单筒双井表层预斜占位钻具打捞技术

Fishing technology of surface pre inclined occupying drilling tool in single barrel double wells

渤海油气田为解决海上平台钻井槽口限制问题,提高大尺寸槽口的利用率,渤海油田先后实施了单筒双井及表层预斜单筒双井。其中表层预斜单筒双井需要在井筒内下入预斜占位钻具,施工过程中部分井出现占位钻具被临井水泥封固在井筒内,无法正常取出,需要进行打捞。

In order to solve the limitation of drilling groove of offshore platform and improve the utilization rate of large size drilling groove,Bohai oil and gas field successively implemented system of twin hole and surface pre-inclined twin hole. The surface pre-inclined twin hole needs to run pre-inclined occupied drilling tools. Some of the occupied drilling tools are cemented by adjacent wells when cementing,which cannot be pulled out of hole normally,and need to proceed fishing procedures.