大弯角螺杆钻具过窗口通过能力分析
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摘要
绥中某油田E井是在老井244. 5 mm套管内开窗侧钻215. 9 mm井眼,采用大弯角螺杆钻具组合进行中短半径钻进作业,而大弯角螺杆钻具组合通过侧钻窗口问题比较突出。鉴于此,考虑有效窗口长度和马达弯角大小等参数的影响,利用ANSYS有限元计算软件,对螺杆钻具组合过窗口进行模拟计算。计算得到钻具组合下入的最大应力及总摩阻力,利用许用摩阻力和许用应力判断螺杆钻具组合下入能力。当螺杆钻具马达弯角分别取1. 50°、1. 75°和2. 00°时,综合考虑强度和摩阻两个条件,能通过的最短有效窗口长度分别为1. 0、1. 0和1. 5 m。研究结果可为现场最终确定钻具组合方案提供理论依据。
Window opening is designed in the Well E in an oilfield of Suizhong,so as to drill a 215. 9 mm hole in the 244. 5 mm casing. The medium-short radius wellbore is designed to be drilled using PDM with large bending angle. The problem of PDM with large bending angle passing through the window is prominent. In view of this,considering the influence of parameters like the effective window length and the PDM bending angle,the ANSYS is used to simulate the window through of the BHA with large bending angle PDM. The maximum stress and total friction resistance of the BHA are calculated. The through capacity of the BHA is then evaluated using the allowable friction and allowable stress. Given the bending angle of the PDM of 1. 50°,1. 75° and 2. 00° respectively,considering the BHA strength and the friction condition,the minimum effective window lengths are 1. 0,1. 0 and1. 5 m,respectively. The study results can provide a theoretical basis for the choice of BHAs.
Window opening is designed in the Well E in an oilfield of Suizhong,so as to drill a 215. 9 mm hole in the 244. 5 mm casing. The medium-short radius wellbore is designed to be drilled using PDM with large bending angle. The problem of PDM with large bending angle passing through the window is prominent. In view of this,considering the influence of parameters like the effective window length and the PDM bending angle,the ANSYS is used to simulate the window through of the BHA with large bending angle PDM. The maximum stress and total friction resistance of the BHA are calculated. The through capacity of the BHA is then evaluated using the allowable friction and allowable stress. Given the bending angle of the PDM of 1. 50°,1. 75° and 2. 00° respectively,considering the BHA strength and the friction condition,the minimum effective window lengths are 1. 0,1. 0 and1. 5 m,respectively. The study results can provide a theoretical basis for the choice of BHAs.
引文
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[2]赵俊平,苏义脑.钻具组合通过能力模式及其分析[J].石油钻采工艺,1993,15(5):1-6.ZHAO J P,SU Y N.Drilling tool assembly throughput model and its analysis[J].Oil Drilling&Production Technology,1993,15(5):1-6.
[3]陈祖锡,唐雪平.中短半径造斜螺杆钻具在套管内的通过度[J].钻采工艺,1999,22(6):7-10.CHEN Z X,TANG X P.Passing ability of medium/short-radius whipstocking screw drill tools inside casing[J].Drilling and Production Technology,1999,22(6):7-10.
[4]祝效华,高原,刘少胡,等.单弯螺杆钻具下入套管可行性分析[J].石油钻采工艺,2011,33(3):106-108.ZHU X H,GAO Y,LIU S H,et al.Feasibility analysis of single bend screw tripping[J].Oil Drilling&Production Technology,2011,33(3):106-108.
[5]刘巨保,罗敏.139.7 mm套管内侧钻水平井弯螺杆钻具通过能力分析[J].钻采工艺,2003,26(1):15-16.LIU J B,LUO M.The passing capacity analysis of curved screw rod in the139.7 mm casing sidetracking horizontal well[J].Drilling and Production Technology,2003,26(1):15-16.
[6]孙健,李黔.177.8mm套管内大角度单弯螺杆下入阻力分析[J].石油矿场机械,2006,35(6):73-75.SUN J,LI Q.Stress analysis of single-bending screw drill tool with large angle[J].Oil Field Equipment,2006,35(6):73-75.
[7]王晓鹏,谢涛,张强,等.弯外壳螺杆钻具窗口通过能力有限元分析[J].石油机械,2017,45(7):34-38.WANG X P,XIE T,ZHANG Q,et al.[J].Finite element analysis of throughput capacity of screw drilling tool after window cutting of casing[J].China Petroleum Machinery,2017,45(7):34-38.
[8]赵域栋,狄勤丰,王文昌,等.浅层水平井管柱可下入性分析及下入过程的可视化[J].钻采工艺,2012,35(3):67-70.ZHAO Y D,DI Q F,WANG W C,et al.Tripability analysis of the strings and 3D visualization of strings running process in shallow horeizontal well[J].Drilling and Production Technology,2012,35(3):67-70.
[9]陈勇,刘飞,张兴国,等.水平井内套管柱下入过程的数值模拟[J].石油机械,2010,38(3):28-30.CHEN Y,LIU F,ZHANG X G,et al.Numerical simulation of the running process of the casing string in horizontal wells[J].China Petroleum Machinery,2010,38(3):28-30.
[10]张强,刘巨保,姚利明,等.石油钻机井架结构梁单元计算精度分析[J].石油机械,2013,41(12):1-5.ZHANG Q,LIU J B,YAO L M,et al.Calculation precision analysis of the beam element for rig derrick structural design[J].China Petroleum Machinery,2013,41(12):1-5.