超大直径、巨厚漂卵石地层钻井泥浆护壁洗井工艺技术

Well Flushing Technology with Drilling Mud in Super Large Diameter and Great Thick Gravel-oulder Formation

摘要:

介绍了采用机械钻井法施工Ф8.3 m、深度286 m(其中漂卵砾石层厚度251 m)矿山竖井的钻井泥浆护壁洗井技术，主要包括钻井泥浆的配制、不同地层条件下泥浆性能参数的选择、调整以及钻井泥浆的净化、洗井等工艺技术措施。

Abstract:

The paper introduced the well protection and well washing technology with drilling mud by mechanical drilling construction method; the drilling diameter was 8.3 m, the depth was 286 m and the thickness of gravelboulder was up to 251 m. The preparation of drilling mud, the selection & adjustment of mud performance parameters in different formations, mud purification and well washing were illustrated.