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Research on casing deformation prevention technology based on cementing slurry system optimization

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petroleum Science 2024年第2期21卷 1231-1240页

作者： Yan Yan Meng Cai Wen-Hai Ma Xiao-Chuan Zhang Li-Hong Han Yong-Hong Liu state key laboratory for performance and structure safety of petroleum tubular goods and equipment materials CNPC Tubular Goods Research InstituteXi©an710077ShaanxiChina College of Mechanical and Electrical Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Shale Gas Evaluation and Exploitation key laboratory of Sichuan Province Chengdu610095SichuanChina CNPC Daqing Oilfield Company Daqing163453HeilongjiangChina

The casing deformation prevention technology based on the optimization of cement slurry is proposed to reduce the casing deformation of shale oil and gas wells during hydraulic fracturing. In this paper, the fracture mechanism of hollow particles in cement sheath was firstly analyzed by discrete element method, and the effect of hollow particles in cement on casing deformation was investigated by laboratory experiment method. Finally, field test was carried out to verify the improvement effect of the casing deformation based on cement slurry modification. The results show that the formation displacement can be absorbed effectively by hollow particles inside the cement transferring the excessive deformation away from casing. The particles in the uncemented state provide deformation space during formation slipping. The casing with diameter of 139.7 mm could be passed through by bridge plug with the diameter of 99 mm when the mass ratio of particle/cement reaches 1:4. According to the field test feedback, the method based on optimization of cement slurry can effectively reduce the risk of casing deformation, and the recommended range of hollow microbeads content in the cement slurry is between 15% and 25%.

关键词： Cement slurry Hollow ceramsite Casing deformation Formation slip Field test

Research on the solid particle erosion wear of pipe steel for hydraulic fracturing based on experiments and numerical simulations

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petroleum Science 2024年第4期21卷 2779-2792页

作者： Si-Qi Yang Jian-Chun Fan Ming-Tao Liu De-Ning Li Jun-Liang Li Li-Hong Han Jian-Jun Wang Shang-Yu Yang Si-Wei Dai Lai-Bin Zhang state key laboratory of Oil and Gas equipment CNPC Tubular Goods Research Institute key laboratory of Oil and Gas safety and Emergency Technology China University of Petroleum Oil Production Technology Research Institute of Liaohe Oilfield Company Tianjin Gas Storage Branch PetroChina Dagang Oilfield Company petroleum Production Engineering Research Institute Daqing Oilfield Company

Erosion wear is a common failure mode in the oil and gas industry. In the hydraulic fracturing, the fracturing pipes are not only in high-pressure working environment, but also suffer from the impact of the high-speed solid particles in the fracturing fluid. Beneath such complex conditions, the vulnerable components of the pipe system are prone to perforation or even burst accidents, which has become one of the most serious risks at the fracturing site. Unfortunately, it is not yet fully understood the erosion mechanism of pipe steel for hydraulic fracturing. Therefore, this article provides a detailed analysis of the erosion behavior of fracturing pipes under complex working conditions based on experiments and numerical simulations. Firstly, we conducted erosion experiments on AISI 4135 steel for fracturing pipes to investigate the erosion characteristics of the material. The effects of impact angle, flow velocity and applied stress on erosion wear were comprehensively considered. Then a particle impact dynamic model of erosion wear was developed based on the experimental parameters, and the evolution process of particle erosion under different impact angles, impact velocities and applied stress was analyzed. By combining the erosion characteristics, the micro-structure of the eroded area, and the micro-mechanics of erosion damage, the erosion mechanism of pipe steel under fracturing conditions was studied in detail for the first time. Under high-pressure operating conditions, it was demonstrated through experiments and numerical simulations that the size of the micro-defects in the eroded area increased as the applied stress increased, resulting in more severe erosion wear of fracturing pipes.

关键词： Erosion wear Applied stress Particle impact dynamics Erosion mechanism

Oxidation behavior of boron-containing(Zr,Ti)C_(x)B_(y)solid solution ceramics at 1600℃in air

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Journal of Advanced Ceramics 2023年第10期12卷 1989-2002页

作者： Huilin Lun Yi Zeng Xiang Xiong Houbu Li state key laboratory of performance and Structural safety for petroleum tubular goods and equipment materials CNPC Tubular Goods Research InstituteXi’an 710077China state key laboratory of Powder Metallurgy Central South UniversityChangsha 410083China key laboratory of petroleum tubular goods and equipment Ouality safety for state Market Regulation CNPC Tubular Goods Research InstituteXi’an 710077China

Multicomponent boron-containing carbide coatings(i.e.,(Zr,Ti)C_(x)B_(y))on a C/C composite show good ablation ***,the high-temperature oxidation behavior of this new type of boron-containing(Zr,Ti)C_(x)B_(y)solid solution ceramics has not been clarified *** present work fabricated(Zr,Ti)C_(x)B_(y)solid solution block ceramics by spark plasma sintering,and their oxidation behavior at 1600℃in air(N2–20-vol%O2)was investigated for the first *** effects of boron on the oxidation resistance of(Zr,Ti)C_(x)B_(y)ceramics were *** results indicate that the(Zr,Ti)C_(x)B_(y)ceramics display good oxidation resistance with the parabolic rate law describing the oxidation *** the trace solution of boron(0.5 wt%)into(Zr,Ti)Cx,the oxidation resistance of carbide ceramics is significantly enhanced,leading to a decrease of 30%in the oxidation rate *** formed oxide scale in the(Zr,Ti)C_(x)B_(y)ceramics is dense,and the interlayer shows stronger ability to inhibit inward diffusion of *** addition,the introduction of boron leads to more negative binding energy of(Zr,Ti)C_(x)B_(y)and improves the oxidation resistance of carbides.

关键词： ultra-high-temperature ceramics(UHTCs) (Zr,Ti)CxBy solid solution oxidation behavior oxidation resistance

The anti-Temperature-vibration properties of viscoelastic anticorrosive tape

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petroleum Science 2022年第5期19卷 2413-2419页

作者： Hai-Liang Nie Wei-Feng Ma Xiao-Wei Hu Wei Dang Jun-Jie Ren Ke Wang Jun Cao Tian Yao Xiao-Bin Liang Institute of safety Assessment and Integrity State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment MaterialsCNPC Tubular Goods Research InstituteXi'an710077China No.2 Oil Extraction Plant Changqing Oilfield BranchPetroChinaGansu745100China

Viscoelastic anticorrosive tape is extensively used for repairing anticorrosive layers on compressor outlet pipelines in the oil and gas ***,there is no relevant research on the coupling effect of temperature and vibration on the performance of viscoelastic anticorrosive *** this paper,acceleration tests of temperature and vibration coupling conditions were conducted to investigate the performance of viscoelastic anticorrosive *** temperature and vibration treatment,the specimens showed wide variance in thickness,and the adhesion and chemical soaking resistance of the tape was ***,the viscoelastic anticorrosive tape still showed high *** to theoretical calculations,the tested viscoelastic body can repair pipes with a maximum diameter of 903 ***,this viscoelastic anticorrosive tape is suitable for the compressor outlets of buried pipelines with diameters smaller than 903 *** research in this paper provides a method and basis for the selection of repairing materials for the anticorrosion coatings of compressor outlet pipelines.

关键词： Station Compressor outlet Anticorrosive coating Viscoelastic anticorrosive tape

Thermoelectric properties of polycrystalline(SnSe)1-x(AgSnSe2)x/2 alloys

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Progress in Natural Science:materials International 2022年第2期32卷 242-247页

作者： Long Jiang Weiwei Liu Lihong Han Hao Sun Yu Wang Yihua Zhang Haijun Wu state key laboratory for performance and structure safety of petroleum tubular goods and equipment materials CNPC Tubular Goods Research Institute MOE key laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and state key laboratory for Mechanical Behavior of materials Xi'an Jiaotong University School of materials Science and Engineering Chang'an University

SnSe is considered as a thermoelectric material with great potential and advantages due to the record of high thermoelectric figure of merit(ZT) of 2.6 at 923 K in single ***,it is difficult to use single crystal SnSe in practice due to its poor mechanical properties and high manufacturing ***,the polycrystalline SnSe also is also not suitable for applications due to its much lower thermoelectric performance compared with single crystal ***,improving the thermoelectric properties of polycrystalline SnSe has become a hot research *** this paper,AgSnSe2doped into SnSe to increase the carrier density of the system and thus improve its thermoelectric *** is found that the addition of AgSnSe2can effectively improve the thermoelectric performance of polycrystalline SnSe.A peak ZT of 0.81 was obtained at 713 K for(SnSe)0.95(AgSnSe2)0.025,which is 305% higher than that of the undoped *** reveals that AgSnSe2-doped SnSe alloy may become a thermoelectric material system with great application potential and significance.

关键词： Thermoelectric materials SnSe AgSnSe 2

Transition of dynamic recrystallization mechanism during hot deformation of Incoloy 028 alloy

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Journal of materials Science & Technology 2020年第7期42卷 241-253页

作者： XiTing Zhong Lei Wang LinKe Huang Feng Liu state key Lab of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China state key laboratory for performance and structure safety of petroleum tubular goods and equipment materials CNPC Tubular Goods Research InstituteXi'an710077China Analytical&Testing Center Northwestern Polytechnical UniversityXi’an710072China

Dynamic recrystallization(DRX)plays significant roles in manipulating of microstructures during hot deformation and the result mechanical properties;however,the underling mechanism leading to multi scale-microstructures remains poorly ***,the DRX mechanism under wide processing conditions(i.e.950-1200°C,0.001-10 s-1)in Incoloy 028 alloy was investigated,where the relationships among flow stress,Z parameter and grain size,as well as the evolution of characteristic microstructures(grain size,sub-grain boundaries,and high angle grain boundaries),are *** the values of Z parameters decrease(corresponding to decreased flow stresses),three typical softening mechanisms successively occur,ranging from continuous DRX controlled by dislocation glide,discontinuous DRX dominated by dislocation motion(climb and cross/multiple slip)and grain boundary migration,to dynamic normal/abnormal grain growth resulting from grain boundary migration,with transition regions where two adjacent mechanisms occur ***,these above three softening mechanisms result in ultrafine,fine and coarse grains,*** present findings demonstrate a comprehensive understanding of DRX mechanism over a wide range of processing conditions,and further provide a new guideline for preparing single crystals.

关键词： Hot deformation Dynamic recrystallization Microstructure evolution Incoloy 028

Misalignment Tolerance in One-side and Symmetric Loading Hopkinson Pressure Bar Experiments

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Acta Mechanica Solida Sinica 2022年第2期35卷 273-281页

作者： Hailiang Nie Weifeng Ma Xueliang He Ke Wang Junjie Ren Jun Cao Wei Dang Institute of safety Assessment and Integrity State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment MaterialsTubular Goods Research Center of CNPCXi'an 710077China Northwestern Polytechnical University XVan 710072China PetroChina Beijing Natural Gas Pipeline Co. Ltd.Beijing 100001China

The split-Hopkinson pressure bar(SHPB)is a widely used experimental technique for studying the mechanical properties of materials at high strain *** are two kinds of loading methods applied in the SHPB technique,namely one-side loading and symmetric ***,the experimental accuracy of the two loading methods is affected by the interface *** present study focused on the inadequate contact caused by the misalignment of the pressure *** commercial software ABAQUS was used for *** result shows that the inadequate contact caused by the alignment of the bars has a non-negligible effect on the calculated *** with the one-side loading Hopkinson pressure bar,the symmetric loading Hopkinson pressure bar has a more relaxed requirement for the alignment of the *** conclusion arrived at in this paper can help researchers to make a reasonable choice between one-side and symmetric loading Hopkinson pressure bars according to actual requirements.

关键词： Contact issues Split-Hopkinson pressure bar Symmetric loading One-side load-ing Error analysis

Microstructure and properties of HAZ for X100 pipeline steel

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China Welding 2016年第1期25卷 77-80页

作者：胡美娟王鹏池强李鹤张伟卫 state key laboratory of performance and Structural safety for petroleum tubular goods and equipment materials CNPC Tubular Goods Research Institute

In general, the weld thermal cycle results in significant changes in microstructure and mechanical properties of the weld heat affected zone （ HAZ）. The microstructure, microhardness and low temperature impact toughness of HAZfor X100 pipeline steel were studied by means of welding thermal simulation. Influence of cooling time on the microstructure and properties in coarse-grained heat affected zone （CGHAZ） was investigated. The results illustrated that polygonal ferrite and a small amount of granular bainite were obtained when the cooling time ts/5 is larger than 1 500 s. Mainly granular bainite was formed when the cooling time t8/5 is in the range of 1500 s to 100 s. Bainite ferrite was observed when the cooling time is smaller than 60 s. Martensite appeared in the CGHAZ with the 20 s cooling time. The value of microhardness in the CGHAZ was higher than that of base metal （ BM） when the cooling time ts/s is smaller than 100 s. The CVN absorbed energy in the CGHAZ was higher than the value of BM when the cooling time t8/5 is smaller than 30 s.

关键词： X100 pipeline steel CGHAZ microstructure microhardness impact toughness

Welding of 2205 duplex stainless steel natural gas pipeline

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China Welding 2016年第3期25卷 49-56页

作者： Li Weiwei Xu Xiaofeng Yang Yang Liu Yaxu Hu Meijuan state key laboratory of performance and Structural safety for petroleum tubular goods and equipment materials CNPC Tubular Goods Research Institute Xi＇ an 710077

There are abundant natural gas resources in western China, but many oil and gas fields are rich in chloridion, sulfureted hydrogen, carbon dioxide and other corrosive medium, which have strong corrosivity to pipeline. One gas field possesses abundant natural gas with great pressure, and the chloridion concentration in the water separated from gas is about 10% , so the medium has great corrosivity. In order to ensure the safety of the pipeline, about 13 km length pipeline and the internal pipes of a gas treatment plant that purifies gas about 12 billion cubic meter a year are made of 2205 duplex stainless steel （2205 DSS ） . 2205 DSS has many characteristics in welding with complex welding process; and because of high quality requirements for the construction of natural gas pipeline and restriction of on-site conditions, the site welding is very difficult. Around the engineering application, a large number of experimental researches have been carried out on the material microstructure, properties and weldability. Finally welded joints which conform to the requirements of standard are obtained, contributing to the first large-scale application of this material in the field of oil and gas pipelines. Considering the engineering application and the latest research development, the welding and key factors affecting the joint properties of 2205 DSS pipes are summarized and analyzed.

关键词： duplex stainless steel weldability key factors property