reverse circulation

基本解释

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。
When excess slurry is left in the wellbore, it may not be possible to remove the excess slurry by conventional means, such as reverse circulation, before the slurry thickens and becomes immovable.
当多余的水泥浆被留在井筒中时，在水泥浆初凝和变成不可流动以前用常规的方法（如反循环）不可能去除这些多余的水泥浆。
www.infopetro.com.cn
Apply air reverse circulation drilling, appropriate increase length of twofold wall drill tools under certain conditions, may be drilling much deeper.
运用气举反循环钻进，在满足一定条件下适当增加双壁钻具长度即可得到较大钻进孔深。

During the third quarter, the company continued what it described as an aggressive drill campaign with 13 core and 10 reverse circulation rigs in operation.
FORBES: Kinross: Tasiast-Expansion Commitment To Hit $1 Billion By Year-End; Production Set For 2014
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