水平井有限级次套管滑套固井工具研制与应用

摘要

为了实现高效分层压裂、提高工具可靠性，需开发水平井有限级次套管滑套压裂工具。与常规固井相比，存在现有胶塞无法满足超大变径条件下水泥封隔、水平段难以有效碰压及单流阀断流等难题。经过室内评价试验及工具结构改进，研制了适合水平井工况的固井胶塞、碰压短节、浮箍浮鞋等装置。结果表明：顺利完成了 SP42H 套管滑套固井试验，碰压正常，通井发现人工井底符合设计要求，后期压裂施工顺利，可以满足水平井套管滑套固井要求。%Finite series casing sliding sleeve fracturing tools in horizontal wells were designed to a-chieve efficient separate layer fracturing and improve the reliability of tool.Compared with the conventional cementing process,the inner diameter of casing sliding sleeve’s tool string changes varied.Available cementing plug cannot satisfied the cement demand,which was hard to achieve effective bump-pressure and cut-off of non-return valve.After more than 100 times laboratory e-valuation test and structural improvement,cementing plug,bump-pressure nipple,float collar and floating shoe were designed for horizontal wells condition.The laboratory test shows that they can satisfy the cement demand of horizontal well casing sliding sleeve.Casing sliding sleeve ce-menting of SP42H well was completed smoothly in August 2013.The bump-pressure is normal. Drifting result shows that artificial bottom wells meets the design requirement.Fracturing is suc-cessfully operated.It can indicate that casing sliding sleeve cementing has achieved initial success.