硬脆地层钻进中钻具频繁断裂原因浅析及应对措施  

Causational Analysis of Drilling Tool Frequently Breaking off in Hard Brittle Strata and Responding Measures

作　　者：秦志坤[1] 

机构地区：[1]中国煤炭地质总局第四水文地质队,河北邯郸056001

出　　处：《中国煤田地质》2007年第A02期93-94,共2页Coal Geology of China

摘　　要：在地热井施工过程中,经常钻遇硬脆地层,特别是侏罗系安山岩、凝灰岩地层,钻进过程中产生严重跳钻现象,个别地层还产生H2S气侵,造成钻铤频繁断裂。以北京、上海地区地热井施工中遇到的实际问题为例,对引起钻具频繁断裂的各种原因进行了认真分析,并提出了相应的应对措施。During the geothermal well drilling, to encounter of hard and brittle strata is very often, especially the Jurassic andesite and tufts. During the operation, serious drilling tool bouncing and H2S gas getting out of from some strata caused drill collar frequently breaking off. To take practical problems happened in geothermal drilling in Beijing and Shanghai areas as examples, analyzed various causations of drilling tool frequently breaking off, responding measures have been brought forward.

关 键 词：硬脆地层 跳钻 断钻具 应对措施 

分 类 号：P634.8[天文地球—地质矿产勘探]