1) bit bounce
钻头回跳
2) bit bounce
钻头跳动
3) back reamer
回扩钻头
1.
The paper dis- cussed the main technical points of bedrock drilling,the design and selection of back reamers for different formations and drilling diameters,detailed construction technology of bedrock with typical engineering cases in China and prospected the future development.
论述了非开挖基岩钻进的技术要点及在不同地层、不同管径施工条件下对非开挖回扩钻头的设计及选用。
2.
The improved back reamer is in favor of rock cutting,taken effects on drilling guiding and stabilizing,low cutting resistance,high strength,and good wear resistance,thus have improved drilling efficiency greatly.
针对导向钻进非开挖铺设地下管线施工中回扩钻头存在的口径大、包泥堵钻、进尺缓慢、切削齿不耐磨等问题,对钻头结构进行了研究,并从导向钻头、出水口、刮刀、切削齿等四个方面对钻头进行了改进。
4) raising and lowering of bit
钻头上下跳动
5) whirling bit
偏心回转钻头
6) drilling tool bouncing
跳钻
1.
During the operation,serious drilling tool bouncing and H2S gas getting out of from some strata caused drill collar frequently breaking off.
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。
补充资料：三一回五一回
1.犹言三番五次。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条