底部钻具组合力学性能分析及优化  

Mechanical Property Analysis and Optimization of Bottom Hole Assembly

作　　者：纪慧 李军[1,2] 杨宏伟 柳贡慧 关立臣[1] Ji Hui;Li Jun;Yang Hongwei;Liu Gonghui;Guan Lichen(China University of Petroleum(Beijing);China University of Petroleum(Beijing)at Karamay;Beijing University of Technology)

机构地区：[1]中国石油大学(北京),北京市昌平区102299 [2]中国石油大学(北京)克拉玛依校区 [3]北京工业大学

出　　处：《石油机械》2024年第6期20-28,共9页China Petroleum Machinery

基　　金：国家自然科学基金重大科研仪器研制项目“钻井复杂工况井下实时智能识别系统研制”(52227804);国家自然科学基金青年科学基金项目“深井复杂地层智能井控井筒压力预测模型与优化控制方法”(2018CFB770)。

摘　　要：深井段复杂地层倾角大,井斜控制难度大,严重影响了安全钻进。为准确控制井眼轨迹,提高钻具的造斜能力,采用纵横弯曲梁法建立力学计算模型,分析井眼曲率、地层倾角、各跨长度和外径、柔性短节、稳定器外径、翼肋推力、钻压和井斜角等因素对多种底部钻具组合力学性能的影响,优化底部钻具组合。研究结果表明:弯螺杆相比于直螺杆有更好的防斜纠斜能力,更适合在深部造斜力强的地层使用;当方位角在25°与205°时地层侧向力最小;定向井段井眼曲率对2种螺杆钻具组合的导向力影响最大,井斜角次之,钻压影响较小;翼肋推力对弯螺杆推靠式旋转导向钻具组合(RSBHA)的造斜力和造斜性能影响最为显著,钻压次之,井斜角的影响较小。研究结果可为复杂地层井斜规律的研究和控制提供参考依据,钻井工具的合理组合及优化对减少井斜问题、顺利完钻起着重要作用。The complex formation in the deep hole section has a large dip angle,making it difficult to control the deviation of well,which seriously affects safe drilling.In order to accurately control the well track and improve the angle building ability of drilling tool,the vertical and horizontal bending beam method was used to build a mechanical calculation model to analyze the influence of factors such as borehole curvature,formation dip angle,span length and outer diameter,flexible pup joint,stabilizer outer diameter,wing rib thrust,WOB and hole angle on the mechanical properties of various bottom hole assemblies,and optimized them.The research results show that the bent PDM drill has better deviation prevention and correction abilities compared to straight PDM drill,and is more suitable for use in deep formations with strong angle building force;when the azimuth angle is between 25° and 205°,the lateral force of the formation is the smallest;the borehole curvature of the directional well section has the greatest impact on the guiding force of two types of PDM drill assemblies,followed by the hole angle,and the impact of WOB is relatively small;the thrust of the wing rib has the most significant impact on the angle building force and performance of the bent PDM drill decentralized rotary steering bottom hole assembly (RSBHA),followed by the WOB,and the influence of the hole angle is relatively small.The research results provide reference basis for the study and control of well deviation in complex formations,and the reasonable assembling and optimization of drilling tools play an important role in reducing well deviation and successfully completing drilling.

关 键 词：底部钻具组合 井斜控制 单弯螺杆钻具 旋转导向钻具 力学性能分析 

分 类 号：TE921[石油与天然气工程—石油机械设备]