Analysis and Optimization of Holding-Inclination Capability of Steerable Assembly with Single Bend and Two Stabilizers
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摘要: 为解决单弯双稳导向钻具组合长时间复合钻进时实钻井眼轨迹偏离设计井眼轨道的问题，对单弯双稳导向钻具组合的稳斜能力及其影响因素进行了分析。根据底部钻具组合复合钻进导向力的拟动态计算模型，编制了相应的计算机程序，模拟计算了钻具组合结构参数、井斜角和钻压对单弯双稳导向钻具组合复合钻进稳斜能力的影响规律。结果表明：第一稳定器如果外径过小，在复合钻进中将处于悬空状态，失去支撑井壁的作用；随着第二稳定器外径的增大，单弯双稳导向钻具组合复合钻进的钻头井斜力减小；螺杆弯角、井斜角和钻压对单弯双稳导向钻具组合复合钻进的钻头井斜力影响均不显著。根据模拟计算结果，对南堡13-斜1025井稳斜段所用单弯双稳导向钻具组合进行了优化设计。实钻结果表明，采用优化设计的钻具组合复合钻进时稳斜效果很好，井斜变化率只有0.18°/30m。这说明，根据各因素对复合钻进稳斜能力的影响规律，对单弯双稳导向钻具组合进行优化设计，可以提高其稳斜能力。
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关键词:
- 钻具组合 /
- 复合钻进 /
- 井斜角 /
- 南堡13-斜1025井
Abstract: When steerable assembly with two stabilizers and one bend was used to drill a section in composite drilling mode,the well trajectory would always deviate from the designed well trajectory.To solve this problem,the angle holding-inclination capability of steerable assembly with two stabilizers and one bend,as well as factors affecting it were analyzed.Based on the quasi-dynamic model for side force of steerable assembly,a computer program was developed to simulate the effects of structural parameters,inclination and weight on bit(WOB)on holding-inclination performance of steerable assembly with two stabilizers and one bend.The results show that if the O.D.of the first stabilizer is too small,the stabilizer will have no contact with borehole.And as the increase of O.D.of the second stabilizer,the rotary side force of steerable assembly with two stabilizers and one bend decreases.In addition,the effects of the bent angle of PDM,inclination,and WOB on the rotary side force of steerable assembly with two stabilizers and one bend are all slight.By using the above simulated results,steerable assembly with two stabilizers and one bend was designed to hold-inclination in Well NP13-X1025.The result of actual drilling indicates the optimized assembly works well in holding-inclination,with the inclination curvature being only 0.18°/30m.It is concluded that,the holding-inclination capability of steerable assembly with two stabilizers and one bend can be improved by optimum design according to the analysis of its influencing factors.-
Keywords:
- bottomhole assembly /
- composite drilling /
- inclination /
- Well NP13-X1025
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[1] Jansen J D.Whirl and chaotic motion of stabilized drill collars[J].SPE Drilling Engineering, 1992, 7(2):107-114.
[2] Sahebkar S M, Ghazavi M R, Khadem S E, et al.Nonlinear vibration analysis of an axially moving drillstring system with time dependent axial load and axial velocity in inclined well[J].Mechanism and Machine Theory, 2011, 46(5):743-760.
[3] Zhu Weiping, Di Qinfeng.Effect of prebent deflection on lateral vibration of stabilized drill collars[J].SPE Journal, 2011, 16(1):200-216.
[4] 狄勤丰, 王文昌, 姚永汉, 等.底部钻具组合动力学模型及涡动特性仿真[J].中国石油大学学报:自然科学版, 2010, 34(3): 53-56. Di Qinfeng, Wang Wenchang, Yao Yonghan, et al.Dynamic model and whirl features’simulation of bottomhole assembly[J].Journal of China University of Petroleum:Edition of Natural Science, 2010, 34(3):53-56. [5] 狄勤丰, 朱卫平, 姚建林, 等.预弯曲动力学防斜打快钻具组合动力学模型[J].石油学报, 2007, 28(6):118-121. Di Qinfeng, Zhu Weiping, Yao Jianlin, et al.Dynamic model of bottomhole assembly used in pre-bending dynamic vertical and fast drilling technology[J].Acta Petrolei Sinica, 2007, 28(6):118-121. [6] Vandiver Kim J, Nicholson James W, Shyu Rong-Juin.Case studies of the bending vibration and whirling motion of drill collars[J].SPE Drilling Engineering, 1990, 5(4):282-290.
[7] 彭国荣, 狄勤丰.滑动导向钻具组合复合钻井导向能力预测方法研究[J].石油钻探技术, 2000, 28(6):4-5. Peng Guorong, Di Qinfeng.Predication of steering ability of the slide steering assembly in compounding drilling mode[J].Petroleum Drilling Techniques, 2000, 28(6):4-5. [8] 狄勤丰.滑动式导向钻具组合复合钻井时导向力计算分析[J].石油钻采工艺, 2000, 22(1):14-16. Di Qinfeng.Calculation and analysis of the steering force of the compounding slide steering assembly[J].Oil Drilling Production Technology, 2000, 22(1):14-16. [9] 狄勤丰, 岳砚华, 彭国荣.滑动式导向钻具组合复合钻井导向力计算及影响参数[J].石油钻探技术, 2001, 29(3):56-57. Di Qinfeng, Yue Yanhua, Peng Guorong.Calculating the steering force of the compounding slide steering assembly and its main influence parameters[J].Petroleum Drilling Techniques, 2001, 29(3):56-57. [10] 高德利.井眼轨迹控制[M].东营:石油大学出版社, 1994: 61-62. Gao Deli.Prediction and control of well trajectory[M].Dongying:Petroleum University Press, 1994:61-62. [11] 蒋恕, 李子丰.钻头处的边界条件研究[J].石油钻采工艺, 2001, 23(4):34-35. Jiang Shu, Li Zifeng.Study of boundary condition at bit[J].Oil Drilling Production Technology, 2001, 23(4):34-35. [12] 李子丰, 李同林.传统底部钻具组合上切点边界条件的正确性[J].石油钻采工艺, 2002, 24(1):31-32. Li Zifeng, Li Tonglin.Accuracy of the boundary conditions at the upper tangent of the conventional BHA[J].Oil Drilling Production Technology, 2002, 24(1):31-32.
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