ø139.7 mm筛管顶部注水泥免钻塞固井完井技术

ø139.7 mm Plug-Drilling-Free Well Cementing Completion Technology

冯德杰 李国锋 赵勇

Feng Dejie Li Guofeng Zhao Yong

中石化胜利石油工程有限公司钻井工艺研究院, 山东东营 257017

Drilling Technology Research Institute, Sinopec Shengli Oilfield Service Corporation, Dongying, Shandong, 257017, China

为解决常规ø139.7 mm筛管顶部注水泥固井时钻塞时间长、易卡钻、易损坏套管和筛管、影响后期作业管柱下入等问题，依据筛管顶部注水泥固井完井技术要求，在现有ø177.8 mm免钻塞固井工具的基础上，通过设计增加球座、上封隔胶筒和可移动密封机构，优化剪钉压力级差，研制了ø139.7 mm免钻塞固井工具，形成了ø139.7 mm免钻塞固井完井配套技术。该技术在3口井进行了现场试验，结果表明，ø139.7 mm免钻塞固井工具可实现下套管钻井液循环、上封隔胶筒辅助固井、碰压后解除打捞时的活塞效应，打捞力减小200 kN以上，且作业时间可缩短约30%。研究结果表明，ø139.7 mm免钻塞固井完井技术减少了钻水泥塞等程序，避免了作业风险，可满足各类油藏及中深井、深井、大直径井眼筛管顶部注水泥完井技术需求。

ø139.7 mm plug-drilling-free well cementing completion technology was studied to replace conventional ø139.7 mm screen top cementing technique which was deficient over an extended period of plug drilling,sticking,casing and screen damage,and impact on subsequent tripping-in of the string.Based on the screen-top-cementing well completion technique,the existing ø177.8 mm plug-drilling-free well cementing tool was redesigned by adding ball socket,upper rubber packer,and removable sealing mechanism and optimizing the pressure differential of shear pins,so as to develop the ø139.7 mm plug-drilling-free well cementing tool and supporting technology.Field tests in 3 wells showed that the ø139.7 mm plug-drilling-free well cementing tool could create piston effects for the circulation while running casing,well cementing assisted with the upper rubber packer,and fish releasing after landing,thus reducing the fishing force by more than 200 kN and the completion time by about 30%.The study also suggested that the ø139.7 mm plug-drilling-free well completion technology was devoid of such completion procedures as plug drilling,thus avoiding risks in completions.Therefore,the technology is suitable for screen-top-cementing operations in all kinds of oil reservoirs,and medium-deep,deep and large-hole wells.

中国石化工程先导项目"?139.7 mm筛管顶部注水泥免钻塞完井技术"（编号：SG12018）研究成果。

https://doi.org/10.11911/syztjs.201405024