The main theory of software for automatic drilling control by PC, the major functions, usages and application prospect of the system are introduced.

介绍了钻进微机自动控制软件的主要原理、系统的主要功能、用途及应用前景等。

youdao

Elements of stonework excavation: Use down-hole drill assisted with hammer drill drilling. Control blasting loosely and side slope molding smoothing wall blasting.

石方开挖施工要点：采用潜孔钻机配以凿岩机钻眼，松动控制爆破和边坡成型光面爆破。

youdao

In Pennsylvania, seven municipalities have filed a lawsuit challenging a 2012 state law that takes away their ability to control gas drilling operations through local zoning.

WSJ: NY appeals court to consider local fracking bans

The friction caused by the gas bubble pushing up the pipe and displacing the drilling mud used to control the pressure could have created a static charge that ignited the gas into a fireball.

FORBES: BP's Deepwater Disaster: What Happened And Why?

Of course, Doug is ignoring that while drilling, the operator temporarily lost control of the well and a flare occurred that lasted over two hours, a pretty good sign that a lot of gas was flowing up the well.

FORBES: No Davy Jones Monkey Business For McMoRan