中国石油网消息：5月1日，记者从工程技术研究院江汉机械研究所获悉，该公司与煤层气公司携手组建联合攻关团队，成功完成2口深层煤岩气井3000米超长水平段压后井筒清理作业，一举刷新了深层煤岩气水平井水垂比最大、水平段最长2项行业纪录，为我国非常规油气资源高效开发提供了技术支撑。

China Oil News: On May 1st, a reporter from the Jianghan Machinery Research Institute of the Engineering Technology Research Institute learned that the institute, in collaboration with the Coalbed Methane Company, has formed a joint research team and successfully completed the post-pressure wellbore cleaning operation of two deep coal rock gas wells with a 3,000-meter ultra-long horizontal section. This achievement has broken two industry records: the maximum water-vertical ratio of deep coal rock gas horizontal wells and the longest horizontal section. It provides technical support for the efficient development of unconventional oil and gas resources in China.

深层煤岩气井长水平段作业长期受井眼轨迹复杂、井筒内残留桥塞、压裂砂返吐等影响，连续管下入阻力大、易自锁，既延长作业周期又增加施工风险，制约规模化开发进程。

The long horizontal section operations of deep coalbed methane wells have long been affected by factors such as complex wellbore trajectories, residual bridge plugs in the wellbore, and the return and ejection of fracturing sand. The resistance for continuous pipe insertion is high and it is prone to self-locking, which not only prolongs the operation period but also increases the construction risks, thereby restricting the process of large-scale development.

攻关团队打破传统“被动扫塞”作业理念，确立“高效井筒清洁”思路，通过数值模拟优化工艺参数，创新应用“分段泵注+动态清砂”组合工艺，破解管柱自锁、卡钻等难题。

The research team broke away from the traditional "passive cleaning" operation concept and established the idea of "efficient wellbore cleaning". They optimized the process parameters through numerical simulation and innovatively applied the combined process of "segmented pumping + dynamic sand removal", successfully solving problems such as self-locking of the pipe string and stuck drill pipes.

此次2口井累计钻除桥塞54支、清理杂物约50立方米，连续管最大下深达5326米、水平段长3036米。其中，通过工艺完善和配套升级，第二口井施工效率提升50%。

In this operation, a total of 54 bridge plugs were removed from the two wells, and about 50 cubic meters of debris were cleared. The maximum depth of the continuous pipe reached 5,326 meters, and the horizontal section was 3,036 meters long. Among them, through process improvement and equipment upgrading, the construction efficiency of the second well was increased by 50%.