桥塞挤水泥工艺及其应用

Cement squeeze technology with cement retainer and application

针对目前油田沿用的常规挤水泥工艺所存在的问题，设计了桥塞挤水泥工艺。该工艺的基本原理是通过电缆式坐封工具将挤水泥桥塞坐封在靠近待挤层段上方的套管中，然后用油管下入专用挤注工具总成打开桥塞内部的滑阀，使油管与待挤层段连通，再通过水泥车对套管外实施验串、封串、二次固井、补救固井及堵漏洞等挤水泥作业。其特点是可立即反洗井，避免了水泥浆倒流井筒，保证了水泥胶结质量和封堵效果。介绍了桥塞挤水泥工艺系统的组成结构、基本参数和应用情况。

In the light of the problems with the conventional cement squeeze technology, the technology for cement squeeze withcement retainer is designed. The procedure of the technology is as follows: firstly, setting the cement retainer in the cas-ing above the formaion to be squeezed by using a wireline setting tool, then, running a snap latch stinger sub and a cn-tralizer togather by the tubing and making it land in the set cement retainer, finally, earrying out cementing by the ce-menting truck to plug-the leakage in the formation or the hole in the casing. By means of this technology, instant backwell washing can be achieved and the slurry can be kept from flowing back to the wellbore. The strueture, parameters andappication of the system for the technology are introduced.