不压井采油管内防喷器关键技术
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摘要
针对转抽或者检泵过程中需要压井、导致作业时间增加甚至储层被污染这一情况,提出了一趟管柱完成"酸压(射孔)-自喷-机采-检泵"作业思路。根据这一工艺需求,提出不压井采油管内防喷器的总体方案,并对其中大通径弧面密封、可变式球座和阀板关闭可靠性三大关键技术进行了详细分析。管内防喷器将以前多次管柱作业变成一次,缩短了作业时间,提高了作业效率,降低了作业成本,同时避免了压井作业,消除了压井对储层可能造成的污染。最后通过试验对工具结构设计和性能进行验证。试验中,防喷器整体密封压力≥35 MPa,阀板密封压力≥10 MPa,阀板反复开关次数≥10次。试验结果验证了工具结构设计的合理性和性能的可靠性。
To address the increased operation time and formation damage caused by well killing during selfflowing turning to pumping well or pump inspection,a one trip working string to complete the operation of "acid fracturing( perforation)-self-flowing-pumping-pump inspection"is proposed. According to the demand of the proposed operation method,the overall scheme of the in-tubing blowout preventer is proposed. The large-diameter arc seal,diameter variable ball seat and valve plate close reliability are analyzed in detail and designed. The in-tubing blowout preventer allows traditional multi-trip operation complete by one trip operation,greatly shortens the operation time,improves the working efficiency,reduces the operating cost,and eliminates well killing operation that may cause formation damage. The tool structure and performance are verified by ground and downhole test. In the test,the tool shows an overall sealing capacity of ≥35 MPa,the valve plate sealing of ≥10 MPa,and the number of valve plate switching of ≥10 times,which indicates a rational tool structure and the reliable performance.
To address the increased operation time and formation damage caused by well killing during selfflowing turning to pumping well or pump inspection,a one trip working string to complete the operation of "acid fracturing( perforation)-self-flowing-pumping-pump inspection"is proposed. According to the demand of the proposed operation method,the overall scheme of the in-tubing blowout preventer is proposed. The large-diameter arc seal,diameter variable ball seat and valve plate close reliability are analyzed in detail and designed. The in-tubing blowout preventer allows traditional multi-trip operation complete by one trip operation,greatly shortens the operation time,improves the working efficiency,reduces the operating cost,and eliminates well killing operation that may cause formation damage. The tool structure and performance are verified by ground and downhole test. In the test,the tool shows an overall sealing capacity of ≥35 MPa,the valve plate sealing of ≥10 MPa,and the number of valve plate switching of ≥10 times,which indicates a rational tool structure and the reliable performance.
引文
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[3]王炜.不压井作业装置技术现状与应用分析[J].石油机械,2014,42(10):86-89.WANG W.The technical status and application analysis of snubbing operation device[J].China Petroleum Machinery,2014,42(10):86-89.
[4]刘东明,张锐,胡伟杰,等.海上油气田不压井作业工艺的可行性试验研究[J].中外能源,2014,19(4):55-60.LIU D M,ZHANG R,HU W J,et al.The feasibility research of the snubbing operation technology on the offshore oilfield[J].Sino-Global Energy,2014,19(4):55-60.
[5]范海涛,曾晓建,赵延茹,等.稠油热采不压井作业工艺管柱[J].石油矿场机械,2008,37(1):69-72.FAN H T,ZENG X J,ZHAO Y R,et al.Non-killing operation pipe string in thermal heavy oil production wells[J].Oil Field Equipment,2008,37(1):69-72.
[6]MOAK R.Hydraulic rigs allow for live well workover[J].Petroleum Engineer International,1982(4):67-72.
[7]宋正聪,李青,高珊珊,等.不压井更换光杆密封装置的研制与应用[J].钻采工艺,2017,40(1):86-87.SONG Z C,LI Q,GAO S S,et al.Development and application of a rod sealing device demanding no well killing for replacement[J].Drilling and Production Technology,2017,40(1):86-87.
[8]王玮.不压井作业油管堵塞器研制[J].科学技术与工程,2016,16(5):154-155.WANG W.Development of plug tool in no-killing operation[J].Science Technology and Engineering,2016,16(5):154-155.
[9]雷德荣.连续油管不压井作业注汽单流阀的设计[J].新疆石油天然气,2012,8(增刊1):128-130.LEI D R.Study of one way throttle valve of steam injection used for coiled tubing[J].Xinjiang Shiyou Tianran Qi,2012,8(S1):128-130.
[10]黄强.文南油田不压井作业防喷泵研制与应用[D].西安:西安石油大学,2015.HUANG Q.Development and application of blowoutpreventing pump used in snubbing service in Wennan Oilfield[D].Xi’an:Xi’an Shiyou University,2015.
[11]李英松,董社霞,付强,等.井下安全阀启闭阀板流场及应力场有限元分析[J].钻采工艺,2017,40(1):61-64.LI Y S,DONG S X,FU Q,et al.Finite element analysis on flow field and stress field of SSSV flapper open/close[J].Oil Drilling&Production Technology,2017,40(1):61-64.
[12]赵华,王廷喜,王萌,等.硅锰合金扭簧应力松弛行为研究[J].固体力学学报,2014,35(4):410-416.ZHAO H,WANG T X,WANG M,et al.Research on stress-relaxation behavior of silicon-manganese alloy torsion-spring[J].Chinse Journal of Solid Mechanics,2014,35(4):410-416.