超深井钻具接头极限工作扭矩图版及其应用

发布时间：2018-04-10 00:17

  本文选题：超深井　切入点：钻具接头　出处：《石油学报》2016年04期

【摘要】：在深井、超深井中,钻具接头由于要承受较大的轴向拉力作用,其抗扭性能受到很大的限制;同时,由于井下情况复杂钻柱遇卡现象时有发生,而顶驱设备的出现使得大轴向力解卡作业时旋转钻柱成为可能,此时钻具接头承受很大的轴向载荷和扭矩联合作用,可能处于极为危险的状态,因此快速准确地确定不同轴向拉力条件下钻具接头的抗扭性能是保障作业安全的关键。API标准中虽提供了拉、扭耦合条件下钻具接头极限载荷的确定方法,但由于基于很多假设性条件,所得结果与实际情况间存在较大误差,特别是在深井、超深井等复杂钻井作业中,这种误差更大。基于钻具接头的三维弹塑性有限元分析,分别计算了3种主流规格钻具接头在不同轴向拉伸载荷条件下的极限工作扭矩,通过对计算结果的多项式拟合,得到钻具接头的极限工作扭矩计算公式,并绘制出钻具接头的极限工作扭矩图版,形成实际工况下的钻具接头极限工作扭矩快速确定方法。
[Abstract]:In deep and ultra-deep wells, the torsion resistance of drill pipe joints is greatly restricted because they have to bear large axial tensile forces, and at the same time, the phenomenon of complex drill string bumping occurs frequently in downhole conditions.The emergence of the top drive equipment makes it possible to rotate the drill string during the operation of the large axial force release card. At this time, the joint of the drill tool is subjected to a great combination of axial load and torque, and may be in a very dangerous state.Therefore, the fast and accurate determination of the torsion resistance of drill joint under different axial tensile forces is the key to ensure the safety of operation. Although the API standard provides a method for determining the ultimate load of the joint under the conditions of tension and torsion coupling,However, due to many hypothetical conditions, there is a large error between the obtained results and the actual conditions, especially in complex drilling operations such as deep wells and ultra-deep wells.Based on the three-dimensional elastic-plastic finite element analysis of drill joint, the limit working torque of three kinds of mainstream drill pipe joints under different axial tensile loads is calculated, and the polynomial fitting of the calculated results is carried out.The formula for calculating the limit working torque of the drill joint is obtained, and the working torque chart of the joint is plotted, and the method for determining the working torque of the joint under the actual working condition is formed.
【作者单位】： 上海大学上海市应用数学和力学研究所;上海大学机械工程博士后流动站;中国石油塔里木油田公司;
【基金】：国家自然科学基金项目(No.U1663205,No.51174130) 上海市重点学科建设项目(S30106) 上海市优秀学术带头人项目(12XD1402500) 上海市部分地方院校能力建设项目(12160500200) 上海市力学在能源工程中的应用重点实验室开放基金项目(ORF-201602) 上海市教育委员会(高峰学科建设项目)资助
【分类号】：TE921
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本文编号：1728812