基于积分计算的倒扣打捞作业中扭矩预测方法  

Torque prediction method in Inverted salvage operation based on integral calculation

作　　者：张健 Zhang Jian(Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《石化技术》2024年第10期86-88,85,共4页Petrochemical Industry Technology

摘　　要：在油气井大修作业中,下入高强度钻杆,对井下油管、筛盲管等落鱼进行倒扣打捞,是非常有效的处理措施。通过将钻柱近似简化成空心圆柱体模型,对其极惯性矩进行积分计算,从理论上推导计算出钻杆反转圈数,以辅助现场分析判断,优选倒扣打捞作业工具组合,使倒扣打捞作业更加精细化操作,提高打捞成功率。In the overhaul operation of oil and gas wells,the insertion of high-strength drill rods is a very effective treatment measure to reverse hook and catch fish such as downhole oil pipes and screen blind pipes.However,in the actual operation process,due to various factors,the success rate of reverse fishing operations is not high.The root cause is still the unclear torque analysis and inadequate understanding of the entire drill string and fish during the reverse fishing process.This article is about simplifying the drill string into a hollow cylindrical model,integrating its polar moment of inertia,and theoretically deducing and calculating the number of reverse turns of the drill string to assist in on-site analysis and judgment,optimizing the combination of reverse fishing tools,making the reverse fishing operation more refined and improving the success rate of fishing.

关 键 词：剪切模量 极惯性矩 扭转角 倒扣打捞 

分 类 号：TE358.4[石油与天然气工程—油气田开发工程]