摘要
针对煤炭采掘过程中许多煤层不具备穿岩测压条件,而采用本煤层测压时,煤层松软测压成功率低的问题,提出了钻杆内下套管及带压注浆封孔技术进行测压,该技术主要是对传统钻头进行改进,研制出三"花瓣"形开闭式PDC合金钻头,并与带压注浆封孔技术相结合。
For the coal mining process,many coal load conditions do not have to wear rock,while the use of this seam manometry manometry low success rate of soft coal problem,casing and drill pipe with pressure grouting sealing technology conduct manometry,the technology is mainly to improve the traditional drill,developed three 'petal' shape retractable alloy PDC drill bits,and in sealing technology with pressure grouting combined.
出处
《煤炭技术》
CAS
北大核心
2015年第5期123-126,共4页
Coal Technology
基金
国家自然科学基金资助项目(51074086
51174109)
关键词
本煤层
带压封孔
误差率
压力
the seam
with pressure sealing
error rate
pressure
