The paper introduces the typical examples for resolving these problems by air-lift reverse circulation drilling technology.

介绍了应用气举反循环钻进工艺解决这些疑难技术问题的成功案例。

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Water well drillers may specialize in a specific method of drilling, such as cable, rotary, auger, hammer or reverse circulation drilling.

水井钻井工可能会专注于一个特定的钻探方法，如电缆，旋转，钻，锤或反向循环钻探。

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The driller adopts the percussion and reverse circulation drilling pattern, with the higher drilling efficiency and wider formation suitability.

钻机采用了冲击反循环方式，钻进效率高，适应地层面广。

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Toward the end of the quarter, Kinross mobilized three core drills to C67 area north of West Branch to follow up on results from reverse circulation drilling earlier in the third quarter.

FORBES: Kinross: Tasiast-Expansion Commitment To Hit $1 Billion By Year-End; Production Set For 2014

The speculation is that something went wrong with the circulation of this drilling mud such that it could no longer control the reservoir pressures.

FORBES: Blowout Suspected in Transocean Rig Explosion