超深井钻具接头极限工作扭矩图版及其应用

doi:10.7623/syxb201604011

石油学报 ›› 2016, Vol. 37 ›› Issue (4): 516-522.DOI: 10.7623/syxb201604011

超深井钻具接头极限工作扭矩图版及其应用

狄勤丰¹, 陈锋^1,2, 李宁³, 王明杰¹, 王文昌¹, 刘树林²

1. 上海大学上海市应用数学和力学研究所上海 200072;
2. 上海大学机械工程博士后流动站上海 200072;
3. 中国石油塔里木油田公司新疆库尔勒 841000

收稿日期:2015-10-28 修回日期:2016-03-01 出版日期:2016-04-25 发布日期:2016-05-06
通讯作者: 王文昌,男,1982年5月生,2003年获兰州大学理论力学专业学士学位,2011年获上海大学工程力学专业博士学位,现为上海大学讲师,主要从事石油工程中的管柱力学问题研究。Email:wangwenchang1982@163.com
作者简介:狄勤丰,男,1963年8月生,1984年获华东石油学院钻井工程专业学士学位,1997年获西南石油学院油气井工程专业博士学位,现为上海大学教授、博士生导师,主要从事石油工程技术和力学问题的研究。Email:qinfengd@sina.com
基金资助:
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)和上海市教育委员会(高峰学科建设项目)资助。

Ultimate working torque chart of tool joints in ultra deep wells and its application

Di Qinfeng¹, Chen Feng^1,2, Li Ning³, Wang Mingjie¹, Wang Wenchang¹, Liu Shulin²

1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
2. Postdoctoral Research Station of Mechanical Engineering, Shanghai University, Shanghai 200072, China;
3. PetroChina Tarim Oilfield Company, Xinjiang Korla 841000, China

Received:2015-10-28 Revised:2016-03-01 Online:2016-04-25 Published:2016-05-06

摘要/Abstract

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。

关键词: 超深井, 钻具接头, 极限工作扭矩, 三维有限元分析, 预测图版

Abstract:

In deep and ultra deep wells, the torsional property of tool joint is highly limited by large axial tensile. Moreover, stucks are frequently encountered during drilling due to complex down-hole situation, while it is possible to twist drill string when using top drive equipment for unstuck operation with larger axial force. In the meantime, tool joints undergo the combined effect of axial load and torque, which may lead to an extreme danger. Therefore, to rapidly determine the torsional property of tool joint under different axial tensile is a key to ensure safety operation. Although API RP 7G provides the method for determining the ultimate load of tool joint under tensile and rotary coupling conditions, a great error exists between the results and the fact due to many hypothetical conditions. Such error may become greater particularly in complex drillings of deep and ultra deep wells. Based on the 3D elasto-plastic finite element analysis of tool joint in this study, the ultimate working torques of three main tool joints were calculated under different axial tensile load conditions. The calculation equations of ultimate working torque were obtained through polynomial fitting of the calculated results, and charts were developed for the ultimate working torque of tool joints, thus establishing a method to rapidly determine the ultimate working torque of tool joint under the actual working conditions.

Key words: ultra deep well, tool joint, ultimate working torque, 3D finite element analysis, predicting chart

中图分类号:

TE28

狄勤丰, 陈锋, 李宁, 王明杰, 王文昌, 刘树林. 超深井钻具接头极限工作扭矩图版及其应用[J]. 石油学报, 2016, 37(4): 516-522.

Di Qinfeng, Chen Feng, Li Ning, Wang Mingjie, Wang Wenchang, Liu Shulin. Ultimate working torque chart of tool joints in ultra deep wells and its application[J]. Acta Petrolei Sinica, 2016, 37(4): 516-522.

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超深井钻具接头极限工作扭矩图版及其应用

Ultimate working torque chart of tool joints in ultra deep wells and its application

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