Well TK431 was a test well drilled in this area trying to solve the problem of borehole instability.
TK 431井是在该地区实施的一口解决该井段井眼失稳问题的试验井。
2
Lowering radioactive material into a borehole and measuring how well the radiation passes through the surrounding rock provides more information about what's down there.
将放射性物质放入钻孔中然后测量放射线穿过周围岩石的特性，可以提供地下物质的更详细信息。
3
During drilling horizontal well, usually adopt geometry steerable drilling technology to increase the penetration rate of borehole track in oil reservoir.