宁夏中卫深井煤炭勘探区钻探工程冬季施工技术

Winter drilling construction technology in Shenjing coal exploration area， Zhongwei City， Ningxia

摘要:

宁夏中卫市深井区块煤炭资源勘探是宁夏能源保供地方急需矿产资源勘探项目，钻探工程需要进行冬季施工，工作区最低气温-21 ℃，期间受低温及地层破碎影响，给钻探施工带来了巨大挑战。勘探区主要煤层以粉煤为主，取心难度大，通过使用抗低温冲洗液体系、合理维护钻机柴油机等设备、优化钻具组合及改善施工人员防寒取暖条件，顺利完成了该项目的钻探工程冬季施工，平均台月效率811.2 m/月。

Abstract:

The coal resource exploration project in the Shenjing block， Zhongwei City， Ningxia， is an urgently needed local mineral resource project for energy supply. The drilling work needs to be conducted in winter when the lowest temperature is -21℃. During the construction period， great challenges exist due to the influence of low temperature and strata fragmentation. The main coal seams were dominated by fine coal， which leads to the highly difficulty of coring. By using a low-temperature resistant flushing fluid system， reasonable maintenance of drill diesel engines and other equipment， optimization of drilling tool combinations， and improving the anti-cold and warm kepping conditions for construction personnel， the winter drilling construction is successfully completed， with an average monthly efficiency of 811.8m/month.