Academic literature on the topic 'Casing pipe'
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Journal articles on the topic "Casing pipe"
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Sivathanu Pillai, C., A. R. Santhakumar, and R. Murugan. "Innovative Method of Shielding the SS Pipe Carrying Industrial Wastes by Using Self-Compacting Concrete for Sustainable Construction." Key Engineering Materials 692 (May 2016): 110–18. http://dx.doi.org/10.4028/www.scientific.net/kem.692.110.
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In an underground R.C. Tunnel constructed as conduit for SS Pipes carrying industrial waste liquid, heavy ingress of ground water was witnessed and had to be overcome. Industrial wastes are to be carried through pipes in pipe system with an outer casing of a 200 mm dia SS pipe. Continuous contact of ground water with the casing SS pipe will deteriorate the pipe with the consequence of mixing of waste with the ground water. To avoid this, tunnel was sealed by enclosing the casing pipe with self-compacting concrete (SCC) for preventing ingress of ground water into the tunnel. As sustainability comprise Economy, Environment and social impact, the use of SCC take care the above factors by utilizing fly ash which replaces cement ,thereby, protecting the environment from industrial waste to produce socially accepted concrete and ensuring sustainable construction.
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Zhou, Mi, Hanlong Liu, Muhammad Shazzad Hossain, Yuxia Hu, and Ting Zhang. "Numerical simulation of plug formation during casing installation of cast-in-place concrete pipe (PCC) piles." Canadian Geotechnical Journal 53, no. 7 (July 2016): 1093–109. http://dx.doi.org/10.1139/cgj-2015-0162.
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There is a historic lack of research examining inner soil plugging and outer lateral soil deformation during installation of pipe piles in clay. Furthermore, the influence of the pile tip geometry on soil deformation has not been investigated. Cast-in-place concrete pipe (PCC) piles are a recent generation of pipe piles for soft ground improvement applications, and are cast in place using an innovative double-walled steel casing with a tapered tip. This paper investigates the effect of tip geometry on soil flow mechanisms inside and outside the PCC pile casing during installation in clay. Large-deformation finite element (LDFE) analysis was conducted simulating the continuous penetration process of the casing installation. The LDFE results were validated against (i) field monitoring data in terms of soil lateral displacement and heave outside the casing and (ii) centrifuge test data in terms of penetration resistance, with excellent agreement obtained. An extensive parametric study was then performed encompassing a practical range of parameters. The geometry of the casing tip was shown to have significant influence on the soil movements inside and outside the casing, but minimal effect on the casing penetration resistance. The optimal tapered tip with a tip angle of 45° and minimal extended tip length beneath the tip angle allowed more soil to be pushed inside the casing and less lateral displacement outside the casing, which dictates the amount of concrete required to fill the cavity inside the pile and the pile construction sequence, respectively. Design expressions are proposed for estimating soil movements inside and outside the casing with optimal tip geometry being installed.
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Haldorsen, Jakob B. U., Espen Stensrud, Ioan-Alexandru Merciu, and Douglas E. Miller. "Characterizing borehole plumbing using full-waveform ultrasonic data: Application to data from a North Sea well." GEOPHYSICS 81, no. 6 (November 2016): B189—B199. http://dx.doi.org/10.1190/geo2015-0546.1.
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We have analyzed ultrasonic flexural data acquired in a North Sea well using a commercial tool optimized for generating such data, and found how one might separate refractions along successive layers of casings, and from these separated refractions, characterize successive pipes and annuli. From the timing of refracted events, we determined the shape of a pipe, and by examining the amplitudes of these refracted events — a measure of the conductance of a pipe wall to transverse movement — we characterized the material in the annuli around a pipe. Data from two separate depth intervals were analyzed, demonstrating that a well plan might not give a sufficiently accurate description of the well. In the deeper interval in which the inner pipe was supposed to be free, we found that the annulus was most likely filled with sedimentation and debris. We could also see that the inner 7 in tubing was touching, or nearly touching, the outer 9⅝ in casing over the entire interval. For the shallower interval, below a certain depth, we saw that the 7 in tubing appeared to be touching the 9⅝ in casing approximately every 7–8 m. From measurements inside the 7 in tubing, we estimated the deformation of the outer 9⅝ in casing to be up to a maximum of nearly 5 cm, meaning that the minimum inner diameter of the outer pipe was close to the outer diameter of the inner pipe. Whereas some features revealed by the analyses were “good-to-know” — such as minor pipe deficiencies and deformations — other features might be critical for planned overhaul, or for operations related to abandonment, e.g., touching points were potential sticking points. Knowing where they were may be critical in determining the best depth to cut a pipe before pulling.
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Kovalev, Vladimir A. "Process diagrams of the driving pile construction in the perforated pipe casing." Stroitel stvo nauka i obrazovanie [Construction Science and Education], no. 4 (December 31, 2019): 2. http://dx.doi.org/10.22227/2305-5502.2019.4.2.
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Introduction. Driving piles in drilled wells are a new trend in pile foundation engineering. Further research and development are devoted to the improvement of structural and process diagrams of these piles in order to increase the bearing capacity mainly on their side surface, mainly in weak clay soils. Materials and Methods. The options of flow and process diagrams of driving piles in perforated (penetrated) wells in various soil conditions are studied taking into account the existing regulatory documents and earlier developments on increasing the bearing capacity of driving piles in perforated (penetrated) wells. Results. The main process operations of the driving piles installation in the soil conditions under consideration include perforation (penetration) of the well with a casing with a loose puncher shoe to the base layer of the soil; formation of a well (cavity) in the base layer of the well by means of immersion of the puncher shoe; installation of a shoe reamer in the puncher shoe and formation of a spread foundation made of hard soil material above; immersion of a casing pipe with holes outside the pipe casing; filling of the casing with hard and bulk soil material; removal of the casing and driving (immersion) into the pipe casing of the precast concrete pile filled with bulk soil material with simultaneous formation of additional local broadening and possible compacted soil zones on the sections of holes along the outer contour of the pipe casing. Conclusions. The proposed structural and process diagrams of driving piles in perforated (penetrated) wells allow to significantly expand the scope of their application in terms of soil conditions, increase the side surface bearing capacity of piles and reliability of the construction of the types of foundations under consideration.
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Qin, Yan Bin, Yi Hua Dou, Xiao Zeng Wang, and Jing Wen Yang. "Development of the Ring Block Drill Pipe Casing Wear Tester and Experimental Research." Advanced Materials Research 634-638 (January 2013): 3582–85. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.3582.
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In deep wells and ultra-deep wells the complex geological conditions often result in serious casing wear. In order to be able to accurately measure the wear efficiency and friction coefficient required in the process of the prediction of casing wear, a ring-block drill pipe and casing wear tester is specifically designed and produced, the scheme of tester is proposed, and the design of structure, driving device, and the detecting system of the friction and contact forces of tester is completed. Adopting the ring block drill pipe casing wear tester and simulating down hole conditions P110 casing wear experiments are finished. The results show that the ring block drill pipe casing wear tester meets the requirement of down hole casing wear experiment. P110 casing wear efficiency decreased with the increasing of wear time. The friction coefficient between the P110 casing and the drill pipe sample is about 0.25.
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Yang, Ce, Hanzhi Zhang, Dengfeng Yang, Dazhong Lao, and Changmao Yang. "Casing wall static pressure distribution behavior in a centrifugal compressor with asymmetric inlet/outlet structures." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 233, no. 1 (May 15, 2018): 37–51. http://dx.doi.org/10.1177/0957650918774934.
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Asymmetric structures of the bent inlet pipes and outlet volute are typically adopted in centrifugal compressors. By using asymmetric inlet/outlet structures, the uniformity of the compressor’s internal flow field in the circumferential direction will be changed. The static pressure distribution behavior around the casing wall is significantly influenced by the coupling effect of the bent inlet pipe and outlet volute. In the present work, three compressors were numerically and experimentally investigated. One compressor had a straight inlet pipe, and the other two had bent inlet pipes. Seventy-two static pressure sensors were mounted around the casing wall to obtain the static pressure distribution at different flow rates for three rotational speeds. The results show that at high rotational speeds with large flow rate conditions, when the static pressure waves induced by the bent pipe and volute act on the same circumferential position, the casing wall static pressure will be increased at the corresponding position. Furthermore, this high static pressure will further influence the static pressure values at other circumferential positions and leads to a more nonuniform circumferential static pressure distribution. Near the design flow rate, when the high static pressure strips, which are induced by both the bent pipe and volute impact different circumferential positions, the high static pressure strip induced by the volute will be weakened. As a result, the high static pressure strip induced by the volute cannot propagate upstream into the impeller. At small flow rate under designed rotational speed, the influence of the volute tongue on the casing pressure distribution will be enhanced. At small flow rate under low rotational speed, the casing pressure distributions of the three models were almost the same because the secondary flow effect of the bent pipe diminishes as the flow rate reduces.
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Li, Jie, Jun Du, Xian Chen, and Yanli Wang. "Effects of pipe casing structure on acoustic emission characteristics of underwater pyrotechnic combustion." Journal of Low Frequency Noise, Vibration and Active Control 39, no. 1 (April 13, 2019): 149–57. http://dx.doi.org/10.1177/1461348419842686.
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In order to investigate the acoustic radiation characteristics of underwater, a pipe casing was introduced and the effects of its main structural characteristics on underwater combustion acoustic radiation were studied by acoustic testing. The results show that the addition of the pipe casing significantly increased the sound pressure level of underwater pyrotechnic combustion, especially the peak of sound pressure level that was increased by 15.9 dB from 155.5 to 171.4 dB at the frequency of 125 and 100 Hz. But the addition of the pipe casing had little effect on the frequency. These results indicated that adding a pipe casing is effective for improving sound pressure level in underwater pyrotechnic combustion. An increase in nozzle diameter from 10 to 12.5 mm resulted in an increase of gas volume, so the peak of sound pressure level and broadband sound pressure level is higher. Changing the pipe casing direction to vertical downward will make the bubble formation period shorter, which will generate more bubbles and strong wake; the interaction between bubbles and wake results in a higher intensity of turbulence, which accounts for the coalescence and breakup of bubbles in the fluid. Besides, changing the diameter of pipe casing can be used to lower the frequency of underwater noise.
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Zhou, Zhi, Jianping He, Minghua Huang, Jun He, and Genda Chen. "Casing Pipe Damage Detection with Optical Fiber Sensors: A Case Study in Oil Well Constructions." Advances in Civil Engineering 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/638967.
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Casing pipes in oil well constructions may suddenly buckle inward as their inside and outside hydrostatic pressure difference increases. For the safety of construction workers and the steady development of oil industries, it is critically important to measure the stress state of a casing pipe. This study develops a rugged, real-time monitoring, and warning system that combines the distributed Brillouin Scattering Time Domain Reflectometry (BOTDR) and the discrete fiber Bragg grating (FBG) measurement. The BOTDR optical fiber sensors were embedded with no optical fiber splice joints in a fiber-reinforced polymer (FRP) rebar and the FBG sensors were wrapped in epoxy resins and glass clothes, both installed during the segmental construction of casing pipes. In situ tests indicate that the proposed sensing system and installation technique can survive the downhole driving process of casing pipes, withstand a harsh service environment, and remain intact with the casing pipes for compatible strain measurements. The relative error of the measured strains between the distributed and discrete sensors is less than 12%. The FBG sensors successfully measured the maximum horizontal principal stress with a relative error of 6.7% in comparison with a cross multipole array acoustic instrument.
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Witek, Wiesław, and Marcin Rzepka. "Zjawiska chemiczno-technologiczne podczas zabiegu cementowania otworu w aspekcie projektowania rur okładzinowych ze szczególnym uwzględnieniem ich wytrzymałości na zgniatanie i rozrywanie." Nafta-Gaz 77, no. 3 (March 2021): 187–99. http://dx.doi.org/10.18668/ng.2021.03.05.
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One of the most important issues that needs to be addressed in the borehole design process is the optimal design of the borehole structure, including the appropriate selection of individual casing columns and their setting given the assumed geological and cementing-technical conditions. Specific geological and technical conditions imply a number of both conditions and constraints. A kind of dimensional unification of pipes adopted by API many decades ago, i.e. a series according to the outer diameter of the pipes, constitutes the main natural constraint. Other elements of this unification, such as a series of steel grades or of classic and PREMIUM thread connections were implemented gradually as drilling technology developed. Regardless of these conditions, one thing always remains the same when designing casing and selecting production tubing, i.e. maintaining the balance between the existing loads acting on the pipes during the drilling process and operation of the borehole and the minimum mechanical strength of the pipes. This article reviews the methods and guidelines for casing pipe designing published by API and of computer programs, including StressCheck, which is currently one of the commonly used pipe design tools. The strength issues discussed in the article refer mainly to the pipe body, ignoring the complex issue of the strength of the thread connections, especially those of PREMIUM type, whose qualification is not subject to API standards, but to the guidelines contained in ISO 13679.
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Li, Zheng, Hong Wu Zhu, Xiao Li Fan, Jian Sheng Hao, and Xiang Ling Kong. "Numerical Analysis of Pressure Gradient along Casing in Helical Turbulent Flow of Power Law Fluid in Eccentric Annulus." Advanced Materials Research 616-618 (December 2012): 685–89. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.685.
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With the use of casing running tool (CRT), casing can be rotated and reciprocated at the same time with circulation of drilling fluid. Thus the flow in well bore was eccentric annular helical. Pressure exerted on casing was important for casing buckling analysis. A numerical model of eccentric annular helical flow of power law fluid was built in this paper. The relationship between average pressure gradient on pipe and some influence factors (pipe axial velocity, rotating angular velocity, drilling fluid circulation velocity, and axial coordination) was analyzed. Results showed that average pressure gradient caused by shear stress was only affected by average annular flow velocity, and it didn’t change along pipe length. Effect of rotating angular velocity on average pressure gradient on pipe was very small and could be negligible. A fitting function between average pressure gradient and average annular flow velocity was obtained in this end.
Dissertations / Theses on the topic "Casing pipe"
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Козоріз, А. В. "Розробка установки автоматизованого контролю якості обсадних труб." Thesis, Івано-Франківський національний технічний університет нафти і газу, 2003. http://elar.nung.edu.ua/handle/123456789/3991.
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Показано, що одними з основних параметрів COT, які відповідають за експлуатаційну надійність обсадної колони і можуть бути визначені методами неруйнівного контролю, є овальність та ексцентриситет. На основі проведених теоретичних досліджень розроблені способи та встановлені аналітичні залежності для визначення овальності та ексцентриситету COT. Експериментально досліджено характер залежності між основними параметри контролю та характеристиками дефектів. Розроблено та впроваджено у виробництво комплекс технічних засобів і технологій, які дозволяють проводити автоматизований вхідний контроль якості обсадних труб.Обзор современных технических средств и технологий контроля качества элементов и соединений трубных колонн показывает, что, не смотря на широкое использование в нефтегазовой области методов неразрушающего контроля, вопрос комплексного контроля стальных обсадных труб (СОТ) остается нерешенным. По данным Американских нефтегазовых компаний в США на трубных базах после проверки обсадных труб на соответствие действующим стандартам отбраковывается до 20% общего количества проверенных труб. Учитывая то, что аварии с обсадными трубами составляют 7-8% всех аварий в бурении, на их ликвидации расходуется свыше 10% времени, которое приходится на ликвидацию аварий всех видов, задача разработки и внедрения методов и средств контроля СОТ является, безусловно, актуальной. Входной контроль СОТ с помощью разработанных технических средств и технологий обеспечит недопущение к эксплуатации труб с дефектами, а также позволит формировать обсадную колонну в соответствии с фактическим техническим состоянием СОТ. ель работы состоит в разработке методов, технических средств и технологий автоматизированного контроля стальных обсадных труб в условиях баз производственного обслуживания нефтегазодобывающего предприятия. Практическое значение полученных результатов состоит в том, что разработанные технические средства и технологии реализованы в комплексной установке контроля основных параметров СОТ, внедренные в производство. Разработанные методы и технические средства прошли промышленные испытания на базе производственного обслуживания Хрестищенского УБР ДК "Укргаздобыча" и в Научно-производственной фирме "Зонд".
Is shown, that some of basic parameters of casing pipes, which are responsible for operation reliability of casing string are ovality and eccentricity. These parameters can be defined by methods of non-destructive testing. On the basis of the carried out theoretical researches the designed ways also are established analytical dependences for definition of casing pipes ovality and eccentricity. Character of dependence between basic parameters of testing and defect characteristics was investigated experimentally. Is developed and entered into manufacture the complex of means and techniques which allow to carry out the automated entrance inspection of quality of casing pipes.
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Палійчук, І. І. "Підвищення герметичності різьбових з'єднань обсадних труб нафтових і газових свердловин." Thesis, Івано-Франківський національний технічний університет нафти і газу, 2010. http://elar.nung.edu.ua/handle/123456789/4379.
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Дисертація присвячена підвищенню герметичності та ремонтопридатності різьбових з’єднань обсадних труб шляхом удосконалення конструкції і програмування параметрів їх працездатності з урахуванням експлуатаційних навантажень. Програмна модель пружно-деформованого стану з’єднання муфти і труби з вузлом ущільнення розроблена на основі моментної теорії коротких циліндрів зі стінками змінної товщини, формул Ламе і знайденої формули контактного тиску. Аналітичні дослідження контактних тисків залежно від радіальних натягів, товщин стінок, внутрішніх і зовнішніх тисків, осьових сил дали змогу встановити нові закономірності впливу конструктивних та експлуатаційних чинників на герметичність і надійність різьбових з’єднань обсадних труб ОТТГ. Удосконалені конструкції різьбових з’єднань із вузлом ущільнення і спосіб підвищення їх герметичності захищені патентами України. Розроблені методики їх проектування і технологічного забезпечення. Дослідні випробування цих з’єднань підтвердили підвищення їх працездатності в обсадних колонах. Спосіб відновлення герметичності з’єднань ОТТГ розроблений на основі газопломеневого металопорошкового напилення герметизуючого шару.Диссертация посвящена повышению герметичности и надежности муфтовых соединений обсадных колонн путем усовершенствования конструкции и программирования параметров работоспособности с учетом эксплуатационных нагрузок. В первом разделе проведен анализ причин усложнений с обсадными колоннами, способов повышения надежности их резьбовых соединений и методов рассвета упругих деформаций их элементов, обоснованы цель и задачи диссертации. Второй раздел посвящен теоретическим исследованиям формирования герметизирующей способности муфтовых соединений обсадных труб ОТТГ и разработке их упруго-деформационной модели с учетом натягов и эксплуатационных нагрузок. Программная аналитическая модель сложного напряженно-деформированного состояния соединений труб и муфт с уплотнительным узлом разработана на основе моментной теории коротких цилиндров со стенками переменной толщины с применением формул Ламе. Модель учитывает совместимость кольцевых, радиальных и изгибающих деформаций, которые возникают в их стенках при свинчивании с радиальным натягом, под действием контактных, внутренних и внешних давлений, осевых сил, и закономерности формирования контактных давлений на участках уплотнения и резьбы.В третьем разделе проведены аналитические исследования влияния конструктивных и эксплуатационных факторов на герметичность муфтовых соединений обсадных труб ОТТГ и зависимости контактных давлений в уплотнении и резьбе от радиальных натягов, толщин стенок, внутренних и внешних давлений, осевых нагрузок. Контактное давление больше при больших натягах, толщинах стенок и меньших диаметрах труб. Вследствие изгибов стенок трубы возникает спад контактного давления к торцу уплотнения, что определяет его герметичность. Величина и спад этого давления возрастают под действием внутреннего давления. Уменьшив в пределах допуска толщину стенок в узле уплотнения, увеличив их гибкость, можна уменьшить этот спад и взаимное влияние различных натягов в уплотнении и резьбе. Программный расчет толщин стенок и натягов обеспечивает большее и более равномерное контактное давление в уплотнении и повышение герметичности соединений ОТТГ при заданных эксплуатационных условиях. В четвертом разделе описаны усовершенствованные муфтовые соединения обсадных труб типа ОТТГ повышенной надежности, представлена методика, оборудование и результаты экспериментальных исследований их герметичности, а также разработаны методики проектирования и технологического обеспечения этих соединений для заданных условий эксплуатации. Опытные испытания усовершенствованных соединений подтвердили закономерности повышения их герметичности в зависимости от натягов в уплотнении и резьбе, толщин и диаметров труб, возможность уменьшения толщины стенки в уплотнении при необходимости увеличения натяга. Испытания позволили установить параметры надежной герметизации таких соединений и их пригодность для использования в эксплуатационных колоннах. Экспериментально установлено, что для соединений ОТТГ 146 увеличение радиального натяга на 0,01 мм повышает их герметичность на 9... 10 МПа, а натяг, больший 0,08 мм, обеспечивает их герметичность при максимальных давлениях опрессовки согласно стандарта. В пятом разделе разработаны ремонтопригодная конструкция муфтовых соединений обсадных труб ОТТГ и способ восстановления их герметичности, представлены результаты их внедрения, обосновано технологическое обеспечение ремонта соединений в производственных условиях. Опытная апробация этого способа проведена на установке газопламенного металлопорошкового напыления путем напыления герметизирующего слоя на уплотнительные поверхности соединения ОТТГ. Апробация подтвердила возрастание герметичности восстановленных соединений при максимальных опрессовочных давлениях по стандарту (до 57,9 МПа для ОПТ 146 х 9,5 Е і до 62,8 МПа для ОПТ 146 х 10,6 Е) и эффективность его применения в промышленных условиях. На основе разработанной методики проектирования и технологического обеспечения усовершенствованных соединений типа ОТТГ разработан руководящий документ для повышения надежности соединений обсадных колонн нефтяных и газовых скважин. Он принят для внедрения на буровых предприятиях ВАТ "Укрнефть".
The dissertation deals with the enhancement of impermeability of threaded joints of casing pipes by means of construction improvement of seal assembly and programming of their working capacity parameters taking into account operational loadings. The computer-generated model of the elastic-deformed state of pipe and coupling joint with seal assembly is designed on the basis of the moment theory of short cylinders with variable thickness of their walls, Lame's formulas and the formula of contact pressure found by the author. Analytical studies of contact pressures dependence from radial tension, thicknesses of walls, internal and external pressures, thrust load have allowed to determine new influencing patterns of constructional and operational factors on leakproofness of threaded joints of casing pipes with seal assembly. Advanced constructions of casing pipes joints with seal assembly and the increase technique of their impermeability are patented. The author has elaborated their design technique and procedures of their technological support. Experimental trials of these joints have confirmed the increase of their working capacity in casing strings. The restoration technique of impermeability of joints with seal assembly is designed on the basis of gas-flame powder spraying of pressurizing metallic layer.
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Ledermann, Thomas H. "Submerged mold casting using heat pipes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ44006.pdf.
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Elalem, Kaled. "Application of heat pipe technology in permanent mold casting of nonferrous alloys." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85067.
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The issue of mold cooling is one, which presents a foundry with a dilemma. On the one hand; the use of air for cooling is safe and practical, however, it is not very effective and high cost. On the other hand, water-cooling can be very effective but it raises serious concerns about safety, especially with a metal such as magnesium. An alternative option that is being developed at McGill University uses heat pipe technology to carry out the cooling.The experimental program consisted of designing a permanent mold to produce AZ91E magnesium alloy and A356 aluminum alloy castings with shrinkage defects. Heat pipes were then used to reduce these defects. The heat pipes used in this work are novel and are patent pending. They are referred to as McGill Heat Pipes.
Computer modeling was used extensively in designing the mold and the heat pipes. Final designs for the mold and the heat pipes were chosen based on the modeling results.
Laboratory tests of the heat pipe were performed before conducting the actual experimental plan. The laboratory testing results verified the excellent performance of the heat pipes as anticipated by the model.
An industrial mold made of H13 tool steel was constructed to cast nonferrous alloys. The heat pipes were installed and initial testing and actual industrial trials were conducted. This is the first time where a McGill heat pipe was used in an industrial permanent mold casting process for nonferrous alloys.
The effects of cooling using heat pipes on AZ91E and A356 were evaluated using computer modeling and experimental trials. Microstructural analyses were conducted to measure the secondary dendrite arm spacing, SDAS, and the grain size to evaluate the cooling effects on the castings. The modeling and the experimental results agreed quite well. The metallurgical differences between AZ91E and A356 were investigated using modeling and experimental results. Selected results from modeling, laboratory and industrial trials are presented. The results show a promising future for heat pipe technology in cooling permanent molds for the casting of nonferrous alloys.
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Groenewald, Abraham. "Thermal management of casting moulds using heat pipes." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52563.
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Thesis (MScEng)--University of Stellenbosch, 2001.ENGLISH ABSTRACT: The use of cylindrical heat pipes for the thermal control and management of casting moulds have been investigated. Heat pipes are tubes that possess a high capability to transfer heat, up to a thousand times or more than an equivalent solid copper rod. The heat pipes used in this thesis are copper tubed, use water as working fluid and have (phosphor-bronze) screen mesh wicks. Experiments relating to practical casting situations in industry were designed and performed, using pure tin as the casting metal. Three cases pertaining to the requirements of an industrial casting mould were considered. The first case considered heating of a mould through heat pipes, in order to keep it at a specific temperature. The second case relates to the situation where metal is cast around a core, and the core is cooled by a heat pipe connected to a heat sink. The heat sink in this case was an air cooled fin. The third case is representative of the situation where molten metal is cast into an external mould and the mould heats up due to the energy flowing in from the casting. In order to cool the mould, heat pipes are used to transport the heat to a water cooled heat sink. These three cases were modeled theoretically, which included using a standard finite element method (FEM) computer package, NASTRAN 2.0 for Windows. For the FEM simulations, the heat pipes are modeled using an equivalent conductivity approach. Theoretical and experimental results are to within ± 30% of each other, but better results could possibly be achieved using a better finite element model for the heat pipes. A simulation case was performed to compare the use of an uncooled mould with a heat pipe cooled mould, and a two and a half time improvement of production rate was achieved. In support of the above mentioned casting related experiments, experiments have also been performed on a specially designed cylindrical heat pipe to determine the evaporator and condenser heat transfer coefficients. It was found that the heat pipe can transfer more than 500 W for vertical operation and around 160 W for horizontal operation. The heat transfer coefficients of the condenser and evaporator ends are in the order of 1800 to 2000 W/mK. Experiments were also performed on the fins used as the heat sink in the experiment where core cooling is investigated, to compare the experimentally determined fin heat transfer coefficient with the theoretically predicted coefficient. A theoretical study was also performed for an inclined ammonia thermosyphon in order to compare the theory to a set of previously determined experimental results. The theory produced accurate results for vertical operation, but it is clearly limited for inclined operation, and can lead to inaccurate results. A special correlation factor, the splashing factor, was defined to analyse the deviation between the theoretical and experimental results. The splashing factor can be used in two ways. Firstly, it can be used as a design correction factor and secondly, it can be processed to indicate which operational variables have the highest impact on the discrepancy between the theory and the experimental data. It is recommended that further research into the use of heat pipes for the thermal control of moulds be considered, based on the results achieved in this thesis. Furthermore, a finite element model for a heat pipe can also be considered. It is also recommended that the use of the splashing factor be considered for the analysis of thermosyphons.
AFRIKAANSE OPSOMMING: Die moontlikheid om hittepype te gebruik in die termiese beheer van gietvorms is ondersoek. Hittepype is buise wat oor 'n baie goeie warmte-oordragsvermoë beskik, 'n duisend maal of beter as 'n ekwivalente soliede koper staaf. Die hittepype wat gebruik is in die tesis is gesëelde koperbuise, wat water gebruik as werksvloeier en ook 'n (fosfor-brons) sifdraad pitmateriaal bevat. Eksperimente wat verband hou met industriële gietprosesse is ontwerp en uitgevoer. Suiwer tin is gebruik as die gietmateriaal. Drie giet gevalle is ondersoek. Die eerste geval het die verhitting van 'n gietvorm met hittepype behels. Die tweede geval hou verband met die situasie waar metaalom 'n kern gegiet word en die kern word afgekoel deur middle van 'n hittepyp wat gekoppel is aan 'n hitteput, wat in die geval 'n lugverkoelde fin is. Die derde geval hou verband met die situasie waar gesmelte metal gegiet word in 'n eksterne gietvorm en die gietvorm verhit as gevolg van die energie wat vanaf die gietstuk invloei. Hierdie drie gevalle is teoreties gemodelleer, wat die gebruik van 'n eindige element analise (EEA) rekenaarpakket insluit (NASTRAN 2.0 for Windows). Tydens die EEA simulasies is die hittepype gemodelleer met behulp van die ekwivalente geleidingskoëffisiënt metode. Teoretiese en eksperimentele resultate is binne .± 30% van mekaar. Beter resultate kan moontlik verkry word as 'n verbeterde eindige element model vir die hittepype ontwikkel kan word. 'n Simulasie geval is uitgevoer om die produksietempo van 'n onverkoelde gietvorm te vergelyk met 'n hittepyp-verkoelde gietvorm, en 'n verbetering van twee en 'n half maal is gevind vir die verkoelde gietvorm. Ter ondersteuning van die bogenoemde gietverwante eksperimente en teoretiese modelle, is eksperimente ook op 'n spesiaalontwerpte silindriese hittepyp uitgevoer om die kondeser en verdamper hitte-oordragskoëffisiënte te bepaal. Daar is bevind dat die hittepyp meer as 500 W kan oordra tydens vertikale gebruik en ongeveer 160W tydens horisontale gebruik. Die hitte-oordragskoëffisiënte vir die kondenser en verdamper is in die orde van 1800 tot 2000 W/m2K. Eksperimente is ook uitgevoer op die finne wat gebruik is as die hitteput in die geval waar die kern verkoeling ondersoek is, om die eksperimenteel bepaalde fin hitteoordragskoëffisiënte te vergelyk met die teoretiese koëffisiënt. 'n Teoretiese studie is ook uitgevoer vir 'n skuins termoheuwel sodat die teorie vergelyk kan word met In stel bestaande resultate. Die teorie gee akkurate voorspellings vir vertikale gebruik, maar is duidelik beperk en kan lei tot onakkurate resultate vir skuins gebruik. 'n Spesiale faktor (splashing factor) is gedefiniëer om die verskil tussen die teoretiese en eksperimentele resultate mee te analiseer. Hierdie factor kan op twee maniere gebruik word. Eerstens kan dit gebruik word as 'n korreksiefaktor en tweedens kan dit geprosesseer word om aan te dui watter veranderlikes die hoogste impak het op die verskil in eksperimentele en teoretiese resultate. Dit word aanbeveel dat verdere navorsing gedoen word op die gebruik van hittepype vir die termiese beheer van gietvorms, gebasseer op die resultate wat verkry is uit die tesis. Verder kan 'n eindige element model vir 'n hittepyp ontwikkel word. Dit word ook aanbeveel dat die "splashing factor" oorweeg word in die analise van termohewels.
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Кулинин, Т. М. "Підвищення герметичності різьбових з'єднань обсадних колон." Thesis, Івано-Франківський національний технічний університет нафти і газу, 2007. http://elar.nung.edu.ua/handle/123456789/4187.
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Дисертація присвячена підвищенню герметичності муфтових різьбових з’єднань обсадних колон за рахунок герметизуючого зузла із вставним тонкостінним герметизуючим елементом із іншого матеріалу, ніж муфта і труба. Удосконалено методи розрахунку вигинів стінок муфти, труби і герметизуючого елемента, з’єднаних з натягом, з врахуванням їх взаємного впливу і крайових умов опирання при дії осесиметричних навантажень. Виведені формули радіальних деформацій стінок для усіх ділянок удосконаленого з’єднання. На основі системи рівнянь балансу деформацій і натягів визначені контактні тиски у різьбі і в ущільненні. Програмно реалізована аналітична модель пружно-деформовано-го стану з’єднання враховує дію тисків, осьового навантаження і температури.
Аналітичні дослідження впливу експлуатаційних чинників на з’єднання виявили закономірності розподілу та зміни деформацій герметизуючого елемента і контактного тиску в ущільненні залежно від жорсткості елементів з’єднання, натягів різьби і ущільнення, величин внутрішнього і зовнішнього тисків, осьового зусилля і температури. Виявлено причини порушення герметичності з’єднання та встановлено умови, за яких пружний тонкостінний елемент забезпечує її при гідравлічних випробуваннях, щільність прилягання його стінок (підвищений контактний тиск) в ущільненні та їх допустимі деформації під час експлуатації. Експериментальні дослідження герметичності нового з’єднання при дії внутрішнього тиску, осьової сили і температури підтвердили, що додатні натяги ущільнення витримують тиски, які більші від випробувальних та експлуатаційних. Температурне розширення герметизуючого елемента компенсує зазор в ущільненні, що дозволяє зменшити крутний момент при згвинчуванні. Розроблено методику проектування нового герметизуючого вузла муфтових з’єднань обсадних труб для заданих експлуатаційних умов (діючих у свердловині внутрішнього і зовнішнього тисків, температури, осьового навантаження).Диссертация посвящена усовершенствованию конструкции и повышению герметичности муфтовых резьбовых соединений безупорного типа обсадных колонн за счет герметизирующего узла со вставным тонкостенным елементом. В первом разделе проведен анализ способов обеспечения герметичности муфтовых резьбовых соединений обсадных колонн, методов расчета деформаций этих соединений, обоснованы актуальность диссертации, ее цель и задачи. Во втором разделе разработаны методы расчета деформаций участков муфты, трубы и герметизирующего елемента, соединенных с натягами, с учетом их взаимного влияния и краевых условий при действии осесимметричных нагрузок. Стенки элементов получают изгибы при опирании на смежные участки с разной жесткостью и деформациями, учитывая влияние и несмежных участков. Выведены формулы изгибов стенок всех участков нового соединения. Из системы уравнений баланса радиальных деформаций и натягов определены контактные давления в резьбе и уплотнении. Модель упруго-деформированного состояния соединения реализована программно и учитывает осевую нагрузку и температуру. В третьем разделе аналитические исследования влияния эксплуатационных факторов на соединение и герметизирующий узел выявили закономерности распределения и изменения деформаций герметизирующего елемента и контактного давления в уплотнении в зависимости от жесткости элементов соединения, натягов в резьбе и в уплотнении, отдельного и совместного действия внутреннего и внешнего давлений, осевой нагрузки и температуры. Неравномерность распределения (особенно давления) зависит от жесткости (толщины) стенок герметизирующего елемента и трубы на контактном участке. Выявлены причины нарушения герметичности и условия, при которых упругий герметизирующий елемент обеспечивает герметичность соединения при гидравлических испытаниях, плотность прилягання его стенок (повышенное контактное давление) в уплотнении и их допустимые деформации при эксплуатации. Осевая нагрузка соединения и температурное расширение герметизирующего елемента вызывают его деформации сжатия и увеличение контактного давления в уплотнении. В четвертом разделе описаны методика, оборудование и результаты экспериментальных исследований герметичности нового соединения при действии внутреннего давления, осевой силы и повышенной температуры при заданных натягах в резьбе и уплотнении. Они подтвердили, что минимальные натяги в уплотнении выдерживают давления, больше испытательных и эксплуатационных давлений. Температурное расширение герметизирующего елемента компенсирует зазор в уплотнении, что уменьшает крутящий момент свинчивания. Допустимое давление линейно зависит от натягов в резьбе и уплотнении, а при малом увеличении натяга в уплотнении выдерживаемое давление резко возрастает. В пятом разделе разработана методика проектирования герметизирующего узла муфтовых соединений обсадных труб для заданных условий эксплуатации (действующих в скважине перепада давлений, температуры, осевой нагрузки).
There have been improved the calculation methods of insulation element, pipe and plug divisions deformation joined with the standoff taking into account their cross-effect and boundary conditions under axisymmetric loading. There have been derived the formulas of walls turns of all divisions of a new joint. On the basis of equation system of radial deformations and standoff balance there have been determined the contact pressure in the thread and obturator. The model of elastic-deformed joint has been applied programmatically and considers the axial load and temperature. The analytical research of exploitation factor influence on the joints - has determined the regularities of allocation and change of deformation of insulation element and contact pressure in the obturator depending on rigidity of joining elements, axial load, and temperature. There have been revealed the reasons of proofness abnormality and established the conditions due to which the elastic thin-walled socket provides the joints proofness at hydraulic testing, conformity thickness in sealing (increased contact pressure) and its admissible deformations while exploiting. The experimental research of a new joint proofness under internal pressure, axial force and temperature vindicated that the minimum standoffs in the sealing stand the pressure which is more than testing and operating pressure in the wells. Temperature extension of insulation element compensates the gap in the standoff which reduces the rotational moment of torsion. There has been developed the methodology of design of insulation element of casing socket joints for the predetermined working conditions (operating in the well of pressure difference, temperature, and axial load).
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Gokce, Neslihan. "Effect Of Fiber And Resin Type On The Axial And Circumferencial Tensile Strength Of Fiber Reinforced Polyester Pipe." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609930/index.pdf.
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In this study, the aim is to investigate the stiffness, longitudinal tensile strength and circumferential tensile strength of short fiber reinforced polyester composite pipes produced by centrifugal casting production method. To achieve this aim, theoretical calculation of modulus of elasticity of pipes was done and then test program was carried out on pipe samples produced with three different resin types which were orthophthalic, isophthalic and vinyl ester resin and three different fiber types which were E glass fiber, ECR glass fiber and basalt fiber. The tests were performed according to ISO (International Organization for Standardization) standards.
When resin type and fiber type effect on the fiber reinforced polyester pipe samples were evaluated, calculated elastic modulus values were in accordance with the test results.
According to the experimental test data, which were used to evaluate the effect of resin type on fiber reinforced polyester pipe properties, there is not a significant difference was observed in the stiffness, longitudinal and circumferential tensile strength test results of pipes having different resin types. In other words, there was not a significant effect of resin type on the stiffness, longitudinal tensile strength and circumferential tensile strength of short fiber reinforced pipes produced by centrifugal casting method.
According to the experimental test data, which were used to evaluate the effect of fiber type on the properties of fiber reinforced polyester pipe, basalt fiber reinforced pipe samples showed higher mechanical performance over E glass fiber and ECR glass fiber reinforced pipes. However, the test results of basalt reinforced polyester pipe were not as good as the individual properties of basalt fiber.
Finally, by comparing the basalt fiber reinforced pipe samples having almost the same stiffness and tensile test results as E glass fiber reinforced pipe samples, the gain in fiber and resin amount were investigated. Basalt fiber reinforced pipes were slightly lighter and thinner than E glass fiber reinforced pipes. However, the decrease in the amount of the fiber and resin in basalt reinforced pipe did not result in an overall cost reduction.
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Moutassem, Wael. "Configuration Optimization of Underground Cables inside a Large Magnetic Steel Casing for Best Ampacity." Thesis, 2010. http://hdl.handle.net/1807/26308.
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This thesis presents a method for optimizing cable configuration inside a large magnetic cylindrical steel casing, from the total ampacity point of view. The method is comprised of two main parts, namely: 1) analytically calculating the electromagnetic losses in the steel casing and sheathed cables, for an arbitrary cables configuration, and 2) implementing an algorithm for determining the optimal cables configuration to obtain the best total ampacity. The first part involves approximating the eddy current and hysteresis losses in the casing and cables. The calculation is based on the theory of images, which this thesis expands to apply to casings having both high magnetic permeability and high electric conductivity at the same time. The method of images, in combination with approximating the cable conductors and sheaths as multiple physical filaments, is used to compute the final current distributions in the cables and pipe and thus the associated losses. The accuracy of this computation is assessed against numerical solutions obtained using the Maxwell finite element program by Ansoft. Next, the optimal cable configuration is determined by applying a proposed two-level optimization algorithm. At the outer level, a combinatorial optimization based on a genetic algorithm explores the different possible configurations. The performance of every configuration is evaluated according to its total ampacity, which is calculated using a convex optimization algorithm. The convex optimization algorithm, which forms the inner level of the overall optimization procedure, is based on the barrier method. This proposed optimization procedure is tested for a duct bank installation containing twelve cables and fifteen ducts, comprising two circuits and two cables per phase, and compared with a brute force method of considering all possible configurations. The optimization process is also applied to an installation consisting of a single circuit inside a large magnetic steel casing.
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CHEN, CHUNG-TA, and 陳重達. "The Study of Full-Casing Pile Construction Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hagtkn.
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碩士中華大學
土木工程學系
106
In recent years, with the construction of large-scale public infrastructures, such as construction of traffic bridges, high-rise buildings, factories, etc., the frequency of use of piles has become more and more frequent, especially the full-casing piles have been widely used. Therefore, it is necessary to further study the characteristics of the construction of the whole casing pile. This study will focus on the full-casing construction to explore its engineering characteristics in different situations. In order to obtain the relevant problems in the practice of the whole casing pile construction technology, this study carried out a series of related cases and possible problems in practical problems. The research results show that the full casing pile has many advantages, because the drilling process has the steel casing prevents the soil from collapsing, so that the pile quality is good, and it can be applied to various geological and topography with different drilling equipment and excavation facilities, and has considerable experience in different geology and topography for practical use. For quite mature work methods. In addition, through the special case study in practice, due to the advantages of small construction space, simple tools, flexible movement, etc., the special casing geology and the lack of base space can be used to make semi-circular retaining piles. The section of the soil facility is halved, and the available area of the basement is increased. The construction speed can shorten the construction period, reduce the project cost, increase the land and project expenditure to achieve the maximum benefit.
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Chen, Kuang-Hui, and 陳光輝. "Analysis of Construction Operation for All Casing Pile." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/2yub8x.
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碩士朝陽科技大學
營建工程系碩士班
91
ABSTRACT Many transportation construction projects are performed in Taiwan. Bridge structure is often used in those projects. The critical activity for construction a bridge is the foundation construction. In foundation construction, pile casing is usually the first activity to be performed. Among different type of pile casing, all-casing pile is quite common used. The operations of all-casing pile include position, driving piles, as well as concrete placing that form the cyclic operations. Discrete event simulation technique is suitable in the analysis of system performance for the cyclic operations. This research takes WH33 viaduct foundation construction project as example to analyze the production rate and unit cost for all-casing pile operations. The computer simulation software COST developed based on CYCLONE discrete simulation methodology is used for facilitating the analysis. Several resource combinations are examined for replacing the original resource allocation. Simulation analysis shows one type of resource allocation that can conduct a better system performance, i.e., lower unit cost and higher production rate.
Books on the topic "Casing pipe"
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Swihart, Jay. Mechanical properties of PVC well screen and casing. Denver, Colo: Applied Sciences Branch, Research and Laboratory Services Division, Denver Office, U.S. Dept. of the Interior, Bureau of Reclamation, 1989.
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Oil country tubular goods from Brazil, Korea, and Spain: Determinations of the Commission in investigations nos. 701-TA-215 through 217 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, DC: U.S. International Trade Commission, 1985.
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Oil country tubular goods from Canada and Taiwan: Determination of the Commission in investigation no. 701-TA-255 (final) under the Tariff Act of 1930, together with the information obtained in the investigation, determinations of the Commission in investigations nos. 731-TA-276 and 277 (final) under the Tariff Act of 1930, together with the information obtained in the investigation. Washington, DC: U.S. International Trade Commission, 1986.
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United States International Trade Commission. Oil country tubular goods from Argentina, Canada, and Taiwan: Determinations of the Commission in investigations nos. 701-TA-255 and 256 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations; determinations of the Commission in investigations nos. 731-TA-275, 276, and 277 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, DC: U.S. International Trade Commission, 1985.
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United States International Trade Commission. Oil country tubular goods from Austria, Romania, and Venezuela: Determinations of the Commission in investigations nos. 701-TA-240 and 241 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations : determinations of the Commission in investigation nos. 731-TA-249 through 251 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, D.C: U.S. International Trade Commission, 1985.
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Oil country tubular goods from Argentina and Spain: Determinations of the Commission in investigations nos. 731-TA-191 and 195 (final) under the Tariff Act of 1930, together with the information obtained in the investigations. Washington, D.C: U.S. International Trade Commission, 1985.
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United States International Trade Commission. Oil country tubular goods from Argentina, Austria, Italy, Japan, Korea, Mexico, and Spain. Washington, DC: U.S. International Trade Commission, 1995.
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United States International Trade Commission. Oil country tubular goods from Israel: Determination of the Commission in investigation no. 701-TA-271 (final) under the Tariff Act of 1930, together with the information obtained in the investigation : determination of the Commission in investigation no. 731-TA-318 (final) under the Tariff Act of 1930, together with the information obtained in the investigation. Washington, DC: U.S. International Trade Commission, 1987.
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United States International Trade Commission. Oil country tubular goods from Argentina, Austria, Italy, Japan, Korea, Mexico, and Spain. Washington, DC: U.S. International Trade Commission, 1994.
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Oil country tubular goods from Israel: Determination of the Commission in investigation no. 701-TA-271 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigation : determination of the Commission in investigation no. 731-TA-318 (preliminary) under the Tariff Act of 1930, together with the information obtained in the investigation. Washington, DC: U.S. International Trade Commission, 1986.
Find full textBook chapters on the topic "Casing pipe"
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Martinez, G., M. Garnier, and F. Durand. "Stirring phenomena in centrifugal casting of pipes." In Modelling the Flow and Solidification of Metals, 225–39. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3617-1_14.
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Marinov, S. G. "Improved Interpretation of the Downhole Casing Inspection Logs for Two Strings of Pipes." In Review of Progress in Quantitative Nondestructive Evaluation, 1673–79. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1893-4_189.
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Aftanaziv, I., L. Shevchuk, L. Strutynska, I. Koval, I. Svidrak, P. Komada, G. Yerkeldessova, and K. Nurseitova. "Increase in durability and reliability of drill column casing pipes by the surface strengthening." In Mechatronic Systems 2, 39–49. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003225447-4.
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Vinoth, B. "Determination of Geometric Attenuation Parameters of Surface Amplitude in Soil Medium Due to Installation of Impact Pile Casing." In Lecture Notes in Civil Engineering, 327–38. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6456-4_35.
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Megahed, G. M., S. K. Paul, T. A. El-Bitar, and F. Ibrahim. "Development of X60/X70 Line Pipe Steels through EAF-Thin Slab Casting Technology at Ezz Flat Steel, Ain Sukhna, Egypt." In Materials Science Forum, 261–68. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-981-4.261.
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"casing pipe." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 197. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_30732.
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"Casing Materials." In Pipe Ramming Projects, 35–39. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/9780784409794.ch04.
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"(drill) casing pipe." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 421. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_43876.
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"driven (metal) casing (pipe)." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 429. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_44225.
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"4260 pipe casing [n]." In Encyclopedic Dictionary of Landscape and Urban Planning, 696–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-76435-9_9621.
Full textConference papers on the topic "Casing pipe"
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Liu, Zhengchun, Robello Samuel, Adolfo Gonzales, and Yongfeng Kang. "Collapse Design of UOE-Pipe Wellbore Casing." In Abu Dhabi International Petroleum Exhibition & Conference. Society of Petroleum Engineers, 2020. http://dx.doi.org/10.2118/203176-ms.
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Marx, C., and A. A. H. El-Sayed. "Evaluation of Collapse Strength of Cemented Pipe-in-Pipe Casing Strings." In SPE/IADC Drilling Conference. Society of Petroleum Engineers, 1985. http://dx.doi.org/10.2118/13432-ms.
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Cheng, Yongming, Tao Qi, and Xiaoxian Chen. "Dynamic Analysis for a Pipe-in-Pipe Riser System." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83942.
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A Pipe-In-Pipe (PIP) riser system is widely used in the offshore industry. A typical top tensioned riser system consists of an outer casing, inner casing and tubing. A PIP thermal insulation technology is often used to satisfy stringent insulation requirements and to maintain an acceptable global performance for pipe-in-pipe steel catenary risers. This paper investigates dynamic analysis for a PIP riser system. This paper first presents a theoretical formulation for a PIP riser system coupled with fluids in the annuli and centralizers between pipes. Hydrodynamic forces associated with the viscous fluid in between concentric cylinders are considered. An effective dynamic stiffness matrix method is then developed to evaluate the added mass and damping influence of the fluid on the natural frequencies and the dynamic response of the coupled riser system. The composite model approach is commonly used for modeling concentric PIP riser systems. In reality, however, the riser pipes may contact with the outer pipe at the connectors and centralizers under dynamic loading. This paper then discusses a detailed PIP finite element model to capture the coupling effects of centralizers with gaps. Examples are used to illustrate the dynamic behavior of a PIP riser system. The first example shows the frequency response of a PIP riser coupled through the fluid in the annulus and centralizers distributed longitudinally. The second one represents a PIP riser system coupled through centralizers with gaps. The analysis was performed by using the FEA program ABAQUS.
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Lyu, Shan, and Seyed Mohammad Taghavi. "Buoyant Miscible Flows in Axially Rotating Pipes: the Effects of Pipe Rotation and Viscosity." In ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/omae2021-63439.
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Abstract The primary cementing operations of oil and gas wells involve pumping a sequence of fluids into the well (initially within a circular casing and eventually within an annular region) to displace in-situ drilling mud. The fluids involved can be miscible, and they can also have different density and viscosity ratios. It is believed that a casing rotation can generally improve the displacement process, within both the circular casing and the annulus. However, there have not been a lot of laboratory studies to prove that such rotation is indeed effective for the displacement within the casing. In fact, due to the lack of knowledge, the casing axial rotation may not be still among the top recommendations to enhance the displacement occurring within the casing. This is in spite of the fact such a rotation would be feasible using various types of casing heads and special adaptors. In this work, we conduct simulations to understand the fluid mechanics behind buoyant displacement flows that occur within the casing (pipe). Our focus is to analyze the effects of the axial rotation speed of the pipe, the viscosity of the fluids and the viscosity ratio between the two fluids on the flow behaviours. Other flow parameters are also present: the fluids are miscible, and they have a density difference; the pipe inclination angle is considered to be near-horizontal (i.e. the most challenging case in terms of creating efficient displacements). We investigate important flow features, such as the behaviours of the interface between the fluids, the mixing between the fluids, the fluid front velocities, etc. Our results help develop a deep understanding of how casing rotation can be used to enhance displacement flows in the primary cementing operations of oil and gas wells.
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Taghipour, Ali, Jan David Ytrehus, and Anna Stroisz. "Casing Removal Tests in Laboratory Setup." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77875.
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Through the life-time of a production field in the offshore petroleum industry it is normal to drill several new wells for both production and injection purposes. The initial well template, either at the platform or at a subsea installation, has space for a fixed total number of wells. When this limit is reached an old well needs to be plugged and the well slot reused to allow new wells to be drilled. In order to re-use well slots and benefit from full diameter when constructing the new well, it is required to remove the tubulars in the upper part of the plugged well. The outside of these tubulars are normally in contact with cement or settled particles from shut-in drilling fluids. Removing the tubular through the cement or settled particle is always challenging and there is need for using new techniques. In order to address the dominating effects in these operations, down-scaled laboratory tests are performed. The experiments reported here are performed by pulling steel pipes out of a cemented annulus. The pipes used in the tests are down-scaled from typical casing sizes. They are either normal pipes, grooved pipes or pipes with and without collars. Two setups with different geometries are used. The first is selected to study the de-bonding effect from the cemented annulus and the mechanical friction that must be overcome to remove the pipe. The other setup is designed to show the effect of collars when pulling out the tubulars. Since most tubulars in wells have collars between each stand with extended diameter, this effect is important to consider when comparing laboratory results to field operations. Results show that the loosening force (de-bonding) and pulling force can be significantly reduced by manipulating the pipes with grooves prior to pulling them out. Further, the results show that the most significant resistance when pulling the tubulars are caused by the collars outside the pipe. It is also observed that the effect of collar is significantly reduced when the pipe is grooved between the collars. In total these results provide improved understanding on the dominating effects when pulling pipes from packed wellbore annulus.
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Hørte, Torfinn, Arve Bjørset, Dan Tudor Zaharie, and Sune Pettersen. "Benefit From Structural Reliability Analysis in Risk Evaluation of Collapse of Externally Supported Casing." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18887.
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Abstract Casing collapse capacity was identified by Equinor as a critical operational parameter on one of its fields in production. This led to re-evaluation and detailed studies of the overall well design, specifically the production casing’s collapse capacity, together with consequence and risk evaluations in case of a potential casing failure. As an important and useful input to the risk evaluations, the present paper presents a structural reliability analysis for casing collapse. Initially, the casing collapse capacity was evaluated using API TR 5C3 / ISO 10400 [1], with insufficient capacity being documented. In order to investigate further, physical material testing and collapse testing were performed. Two kinds of collapse tests have been performed: i) tests of unsupported pipe and ii) test of pipes with external support from the cement and formation surrounding the pipe. While a paper from 2018 (OMAE2018-78767) considered casings without external support, the present paper pays attention towards supported pipes. Five collapse tests have been performed where test lengths of the 9 5/8” casing were installed inside a thick-walled pipe that simulates the support. A small gap leaves an annulus between the casing and the supporting pipe, allowing a controlled pressure to increase until collapse. The tests have been simulated by finite element analyses. Good correspondence was obtained, providing confidence that FE simulations can be used to predict the collapse capacity of supported pipes. While the tests were only performed for an idealized case with support around the whole circumference, a large number of FE simulations have been carried out for different combinations of support conditions together with variations in pipe ovality and internal wear from drilling. Ideally, the space between the casing and the rock formation is filled by cement. However, in practice there may be channels where there is no cement, likely to occur if the casing is eccentric in the well bore during cementing. These results from these FE simulations have been used to generate a response surface. Subsequent structural reliability analyses have been performed, in which well specific uncertainty associated with the above parameters is considered. Measurements and logging are used to minimize the uncertainty in these inputs and thereby leading to a reduction in the calculated failure probability. The probability of casing collapse is calculated conditional on different magnitude of the differential pressure of the pipe. By using SRA the potential over-conservatism in the conventional deterministic analysis is avoided. The SRA results were used to assist in the risk evaluation resulting in an allowance for continued production on existing wells.
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Keil, Brent, Robert Card, and Trevor Gonterman. "Innovative Steel Casing Pipe Installation Using Mechanical Interlocking Joints." In Pipelines 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481646.014.
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Lumankun, Barry Albert, Diyah Ayu Adiningtyas, Cinto Azwar, Ahmed Osman, Rudi Hartanto, Erwindo Tanjung, and Sayid Faisal Abdila. "Improving Cement-to-Pipe Bonding Evaluation on Coated Casing." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21804-ms.
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ABSTRACT In the Oil and Gas industries, drilling a well in both exploration and development operations is becoming more challenging due to the reservoir location and complex reservoir system. A sophisticated high-cost well structure with complex trajectory, subsea system, or even operating in deep water is sometimes unavoidable. One of the crucial factors for a successful well construction operation is to achieve excellent well integrity by having good zonal isolation throughout the target reservoir section. This requires flawless primary cementation from cement job planning, design, and up to execution. The cement bond quality will need to be evaluated by performing the post job cement execution evaluation and wireline logging cement bond log survey. Supported with more stringent regulations, well integrity is becoming a fundamental aspect in drilling and production operations. This brings new challenges to cementing operations and subsequent cement evaluation. Flawless primary cementation is of great importance, from the job planning, design, to the execution. Post-job cement evaluations are needed by performing Pressure Match Post-Job Analysis and Wireline Logging Cement Bond Log Survey. Key parameters in designing optimum zonal isolation cement slurry is good understanding of the wellbore technical challenges and mitigating all geological and formation-related risks, such as narrow pressure margin, gas migration risk, etc. Light cement, complicated cement composition recipes, small cement - mud weight ratio are more common these days, supported with the developing technology in cementing. These, on the other side, would impact the cement bond evaluation. Good cement bond is crucial to ensure good zonal isolation across the reservoir intervals. Casing external coating, applied to protect casing strings from rusts, is another aspect affecting the cement bond, especially cement-to-casing bond. A more advanced cement bond evaluation tool will be required to cope with variety of cementing conditions, to enable producing undoubted log results. Thus, helping Operator in making decisions of subsequent well operations. This paper shows and presents different cement bond log interpretation results from four wells executed with a different method of implementations, performed in a development drilling campaign in Natuna Sea, offshore Indonesia in year 2019. The paper will focus on the 9-5/8" casing cementation, on which the cement bond evaluation became one of the main attentions.
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Larbi Zeghlache, Mohamed, Abdulaziz Bazaid, Freeman Hill, and Nacer Guergueb. "Comprehensive Casing Corrosion Inspection Using Multi-Frequency Array EM Technology." In SPE International Oilfield Corrosion Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205050-ms.
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Abstract Historically, only total metal thickness measurement was possible using frequency domain electromagnetic (EM) logging tools. With advances in technology, it is critical to develop a frequency domain alternative answer using a multi-frequency array EM pipe inspection tool to accurately estimate the individual wall thicknesses of as many as five concentric pipes. Results from yard testing in a special design mockup, as well as field logs, are demonstrated as part of the technology assessment process. The new multi-frequency array EM tool uses the eddy current principle and includes two transmitters and eight receivers. It operates in continuous wave mode at multiple frequencies. Optimized transmitter-receiver spacing configurations and multi-frequency operation provide sufficiently diverse information to help assess the metal loss in each individual pipe for a wide range of configurations. The tool uses a sophisticated workflow of data processing and inversion algorithms to decouple individual thickness information from the measured data. The capabilities of the tool are demonstrated using two 400-ft long pipe mockups, each having 18 different combinations of overlapping and non-overlapping defects in five-, four-, and three-pipe sections. The configurations of the pipes used in the mockups were chosen to cover typical well completions commonly used in the Middle East. Data from the mockups are validated using synthetic data generated using two-dimensional (2D) computer models. The tool has delivered unprecedented accurate assessments of the fourth and fifth pipes, as well as an accurate assessment of the commonly evaluated first, second, and third pipes. The sensitivity of the inversion to model mismatches, such as those introduced by decentralized pipes, is studied by deliberately decentralizing one of the mockup pipes over a length of the log. An algorithm designed to correct for pipe eccentricity is also demonstrated. The results from the surface testing are discussed along with the performance of the tool in a test well with pipe configurations similar to the mockups. In the studied test well, the tool was able to identify defects in the outermost strings. This solution utilizes a novel inversion algorithm of big data from multi-frequency array sensors to derive individual pipes corrosion. This technology can significantly improve proactive decision making for mature well operations, especially in areas with high corrosion rates and shallow outer casing corrosion.
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Woelfel, S. R., and P. T. Vollands. "Breakthroughs in Casing Running Efficiency Utilizing Modern Pipe Handling Technology." In SPE/IADC Drilling Conference. Society of Petroleum Engineers, 2001. http://dx.doi.org/10.2118/67811-ms.
Full textReports on the topic "Casing pipe"
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John D. Watts. Results of Performance Tests Performed on the John Watts Casing Connection on 7" Pipe. US: John D. Watts, Houston, TX, August 1999. http://dx.doi.org/10.2172/770563.
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John D. Watts. Results of Performance Tests Performed on the John Watts WW Casing Connection on 7" Pipe. US: John D. Watts, Houston, TX, February 2000. http://dx.doi.org/10.2172/769641.
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Schwarz, G. Continuous casting and inside rolling of round billets for seamless pipe. Final technical report. Office of Scientific and Technical Information (OSTI), July 1996. http://dx.doi.org/10.2172/266887.
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