防塌泥浆在江西省朱溪矿区ZK1013孔煤系地层钻探施工中的应用

Application of Anti-cave Mud in Coal Formation Drilling of ZK1013 of Zhuxi Mining Area

摘要:

介绍了朱溪矿区ZK1013孔的施工情况。钻孔在470～490、630～650、703～709 m三段出现严重坍塌，针对该孔的地层情况。在分析孔壁失稳原因的基础上，提出了两套适用于金刚石绳索取心工艺的复合泥浆体系，取得了良好的应用效果。

关键词:朱溪矿区;煤系坍塌地层;泥包钻头;护壁;复合泥浆体系

Abstract:

The construction of ZK1013 hole in Zhuxi mining area was introduced, the severe collapse happened at the sections of 470～491, 630～650 and 703～709m. According to the formation conditions and based on the analysis on the reasons of the wall instability, 2 sets of composite slurry system suitable for diamond wire-line coring process were proposed and good results were achieved.

Key words:Zhuxi mining area; coal system collapsed strata; balled bit; wall retaining; composite mud system