青海油田套管切割工艺改进与应用.pdf

第36卷第5期
石油钻采
Vol 36 No. 5
2014年9月
OIL DRILLING& PRODUCTION TECHNOLOGY
Sept. 2014
文章编号:1000-7393(2014)05-0134-04doi:10.13639/odpt.2014.05.034
青海油田套管切割工艺改进与应用
颜生鹏
(青海油田测试公司,青海海西816400)
引用格式:颜生鹏.青海油田套管切割工艺改进与应用『J].石油钻采エ艺,2014,365):134-137.
摘要:通过倒扣将卡点以上的管柱解卡起出以及在取换套施工中倒套管取套,施工周期长,施工费用高,每次倒出的管柱
程度不确定,施工显得非常被动。利用切割工具预先切割井内卡点以上的自由段管柱,将被切割的管柱一次性起出,大大加快
了施工速度,而且对切割位置可实现人为控制。在现场多口井使用中通过对机械内割刀内部结构的不断改进,将对刀头机械施
加压力改为水力施加压カ,解决了机械内切割エ具坐卡确定切割位置困难、刀头加压不均匀、对井内被切割管柱鱼顶不在井ロ
而不能预先施加提拉力导致无法正常切割等问题;同时对切割管柱组合也进行了不断改进和现场试验,解决了切割和打捞需
两次完成、效率低和刀头易损的问题,实现了切割打捞一体化施エ,有效地保护了割刀刀头,延长了刀头使用寿命,提高了施工
效率。目前,青海油田套管切割工艺已逐步替代了通过倒扣解卡打捞处理卡钻事故的传统修井工艺,成为快速解除卡钻管柱事
故和取套、换套施工中管柱快速起出套管的首选修井工艺之
关键词:套管切割;取套;换套;砂埋;管柱组合
中图分类号:TE358;TE935文献标识码:B
Improvement and application for casing cutting technology in Qinghai Oilfield
YAN Shengpeng
Test Company of Qinghai Oilfeld, Haixi 816400, China
Abstract: The operation of freeing the stuck pipe above the sticking point by back-off and taking the casing during casing replacing
will take a long time and a lot of money, and the extent of retrieved casing is not certain, so the operation is quite passive. Using cutting
tool to cut off the free string above the sticking point in the hole and retrieving the cut-off string out of hole at one time can greatly speed
up the operation and can realize manual control over the cutting location. In a number of wells at site, the internal structure of mechani-
cal inside cutters has been improved, and hydraulic force is exerted to cutting head instead of mechanical force, which has solved the
problems of difficulty in determining the cutting location of the mechanical inside cutting, uneven force exerted on the cutting head, as
well as being unable to cut normally due to failure to exert pull force in advance due to the fish head not being at the wellhead. Also, the
string assembly to be cut off has been improved and tested on site, which has solved the problems of cutting and fishing to be finished in
two times, low cfficicncy and easy damage to the cutters, realizing integrated operation of cutting and fishing, effectively protecting the
cutting head, extending the service life of cutters and improving the job efficiency At present, the cutting technology in Qinghai Oilfield
has gradually replaced the traditional well servicing technology which addresses stuck pipe by back-off and fishing. This cutting technol
ogy has become one of the preferred downhole service technologies to quickly remove stuckpipe accident and rapidly retrieve the casing
string in retrieving and casing replacing operations
Key words: casing cutting; casing taking; casing replacing sand burying; string assembly
随着背海油田取套换套工作的开展,套管切割作原理的不同,切割工具可分为4类:聚能切割弹
技术已经成熟,配套了一系列的切割工具。根据工切割、化学喷射切割、机械割刀切割和水力式割刀切
作者简介:颜生鹏,1968年生。1990年毕业于重庆石油学校钻井エ程专业,现主要从事井下作业工具和测井仪器、工具研
究工作,工程师。电话:0937-8903020。E-mail:yaspqh(@petrochina.com.cna