石油钻采工艺2023，Vol.45Issue(5)：562-567,6.DOI:10.13639/j.odpt.202207050
循环推送下套管系统的研制
Development of a circulating pushing casing running system
摘要
Abstract
How to safely run the casing to the predetermined position is one of the technical challenges in completion of structurally-complex wells such as extended-reach wells,branch wells and cluster wells.A circulating pushing casing running system(with mud circulation and pushing forces)was developed.The system can automatically connect casing,establish drilling fluid circulation,rotate the casing string and generate axial oscillation force at the end of the casing string to reduce casing running friction.Moreover,it is capable of removing sand bridges and steps by cutting the borehole wall.This paper introduces the structure and working principles of the key devices of the system,namely the casing circulating rotating device and casing pushing running device.Numerical simulation and laboratory testing were performed to analyze the slip load-bearing capacity of the casing circulating rotating device.The results show that the casing circulating rotating device works reliably,and can bear an axial load of 2 400 kN,a torque of 30 kN·m and sealing pressure of 35 MPa.Under the designed pump rate,the pressure drop through the casing pushing running device is 2.7 MPa,and the oscillation force is 41 kN.Field testing shows that the circulating pushing casing running system effectively improves the safety of casing running.关键词
大位移井/下套管/钻井液循环/套管推送/完井Key words
extended-reach well/casing running/drilling fluid circulation/casing pushing/completion分类
能源科技引用本文复制引用
赵传伟,孙家祥,兰恭涛,吴仲华,陈勇,周志刚,刘晗..循环推送下套管系统的研制[J].石油钻采工艺,2023,45(5):562-567,6.基金项目
中石化集团公司科技攻关项目"高摩阻井眼套管下入分段推送技术研究"(编号:JP15014) （编号:JP15014）
中国石油化工股份有限公司项目"准中超深层高效钻井关键技术研究"(编号:P22130). （编号:P22130）
