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Failure evaluation mechanism of cement sheath sealing integrity under casing eccentricity during multistage fracturing
《Petroleum Science》2024年第5期3428-3445,共18页Yan Xi Yu Yao Xue-Li Guo Jun Li Yu-Dong Tian Gong-Hui Liu 
financially supported by the National Natural Science Foundation of China (Grant No. 52374001, No. 52004013)。
A microannulus(MA) is the primary reason for sustained casing pressure in multi-stage fractured-shale gas wells. However, the effect of the casing eccentricity on the long horizontal section has not been considered. I...
关键词：Cement sheath Microannulus Casing eccentricity Numerical simulation 
Reshaping force for deformed casing repairing with hydraulic rolling reshaper and its influencing factors
《Petroleum Science》2024年第4期2745-2757,共13页Hong-Fei Li Min Luo Ting-Ting Xu Qiao-Zhen Li Cong-Jian Huang 
financially supported by the National Natural Science Foundation of China (51674088);Natural Science Foundation of Heilongjiang Province of China (LH 2021E011)。
Hydraulic rolling reshaper is an advanced reshaping tool to solve the problem of casing deformation,which has been widely used in recent years.When it is used for well repair operation,the reshaping force provided by ...
关键词：Hydraulic rolling reshaper Reshaping force Deformed casing Casing reshaping Hertz contact theory 
Analysis of mechanical strengths of extreme line casing joint considering geometric, material, and contact nonlinearities
《Petroleum Science》2024年第3期1992-2004,共13页Ji-Yun Zhang Chi Peng Jian-Hong Fu Quan Cao Yu Su Jian-Yun Pang Zi-Qiang Yu 
financially supported by National Natural Science foundation of China(Grant No.52104006);Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance(Grant No.2020CX040202)。
To address the challenges associated with difficult casing running,limited annular space,and poor cementing quality in the completion of ultra-deep wells,the extreme line casing offers an effective solution over conve...
关键词：Extreme line casing Elastic-plastic mechanics Finite element analysis Tensile strength Collapse strength 
Prediction models of burst strength degradation for casing with considerations of both wear and corrosion被引量：3
《Petroleum Science》2024年第1期458-474,共17页Jie-Li Wang Wen-Jun Huang De-Li Gao 
Casing wear and casing corrosion are serious problems affecting casing integrity failure in deep and ultra-deep wells.This paper aims to predict the casing burst strength with considerations of both wear and corrosion...
关键词：Deep well Casing integrity Casing wear Casing corrosion Burst strength 
A novel algorithm for evaluating cement azimuthal density based on perturbation theory in horizontal well
《Petroleum Science》2024年第1期244-251,共8页Ji-Lin Fan Feng Zhang Qian Chen Hao-Chen Song Lu-Yu Zhong Yue-Xiang Dai 
The authors would like to acknowledge the support of the National Natural Science Foundation of China(41974127,42174147).References。
Cement density monitoring plays a vital role in evaluating the quality of cementing projects,which is of great significance to the development of oil and gas.However,the presence of inhomogeneous cement distribution a...
关键词：Cement azimuthal density Perturbation theory Casing eccentricity Spatial dynamic response function Regularized Newton iteration 
Erosion characteristics and simulation charts of sand fracturing casing perforation
《Petroleum Science》2023年第6期3638-3653,共16页Shan-Zhi Shi Si-Song Zhang Ning Cheng Gang Tian De-Zhi Zeng Hui-Yong Yu Xi Wang Xin Zhang 
support from Sichuan Science and Technology Program(21JCQN0066);supported by National Natural Science Foundation of China(No.51774249).
Large-scale sand fracturing is a necessary means in the efficient exploitation of shale gas/oil.However,in the process of fracturing operation,the sand carrying fluid and proppant easily causes scouring and wear to pr...
关键词：Sanding fracturing EROSION Numerical simulation Casing perforation Solid-liquid flow 
Risk assessment of corroded casing based on analytic hierarchy process and fuzzy comprehensive evaluation被引量：5
《Petroleum Science》2021年第2期591-602,共12页Sheng-Shan Chen Han-Xiang Wang Hao Jiang Ya-Nan Liu Yan-Xin Liu Xiao-Xiao Lv 
This work was supported by the National Natural Science Foundation of China(Grant No.2016ZX05042004);the Joint Funds of the National Natural Science Foundation of China(Grant no.U1762104);the Major Scientific and Technological Projects of CNPC(Grant No.ZD2019-184-004);the Fundamental Research Funds for the Central Universities(20CX02306A);the Opening Fund of National Engineering Laboratory of Offshore Geophysical and Exploration Equipment;The authors also would like to express their sincere gratitude to Dr.Zhang Dalei for his assistance in corrosion tests.
Casing corrosion during CO2 injection or storage results in significant economic loss and increased production risks.Therefore,in this paper,a corroded casing risk assessment model based on analytic hierarchy process ...
关键词：Corrosion rate Residual strength Analytic hierarchy process Fuzzy comprehensive evaluation 
A mechanistic model of heat transfer for gas–liquid flow in vertical wellbore annuli被引量：4
《Petroleum Science》2018年第1期135-145,共11页Bang-Tang Yin Xiang-Fang Li Gang Liu 
sponsored by the National Natural Science Foundation of China (Grant No. 51504279);Shandong Provincial Natural Science Foundation, China (ZR2014EEQ021);Qingdao Science and Technology (15-9-1-96-jch);the Fundamental Research Funds for the Central Universities (17CX02073, 17CX02011A and R1502039A);973 Project (2015CB251206)
The most prominent aspect of multiphase flow is the variation in the physical distribution of the phases in the flow conduit known as the flow pattern. Several different flow patterns can exist under different flow co...
关键词：Gas-liquid flow Vertical annuli HEATTRANSFER Tubing liquid film Casing liquid film 
Numerical stress analysis for the multi-casing structure inside a wellbore in the formation using the boundary element method被引量：1
《Petroleum Science》2017年第1期126-137,共12页Wan Cheng Yan Jin Mian Chen Guo-Sheng Jiang 
supported by the China National High Technology Research and Development Program 863 (Grant No. 2013AA064503);The China Scholarship Council
A multi-casing structure in drilling engineering can be considered as an inhomogeneous body consisting of many different materials. The mechanical behavior of the inhomogeneous body in an infinite domain is very com- ...
关键词：Displacement discontinuity method Fictitiousstress method Drilling mechanics Wellbore stressconcentration Inhomogeneous body 
The effects of sulfide stress cracking on the mechanical properties and intergranular cracking of P110 casing steel in sour environments被引量：6
《Petroleum Science》2013年第3期385-394,共10页Hou Duo Zeng Dezhi Shi Taihe Zhang Zhi Deng Wenliang 
support of the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University in China;the National Natural Science Foundation of China (Grant No.51004084)
Variation and degradation of P-110 casing steel mechanical properties, due to sulfide stress cracking （SSC） in sour environments, was investigated using tensile and impact tests. These tests were carried out on spec...
关键词：Acidic solutions high-temperature corrosion hydrogen embrittlement intergranular corrosion sulfide stress cracking 
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