This is a reversal thinking operation concept against the pipe drilling method of casing pipe wall protection described in conventional books.

本方法与书本上所述的套管护壁跟管钻进方法有反向思维操作概念。

youdao

The structural characters of steel pipe drilling rod, the signification of welding repair for the rods and the narrow gap welding process and equipment are introduced in the paper.

介绍了钻铤钢管的结构特点、焊接修复的意义，以及窄间隙焊接工艺与设备。

youdao

Permanent towers, called derricks, used to be built to handle the long sections of drilling pipe.

被称为井架的永久性的塔，过去是为处理长距离钻探管道而建的。

youdao

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?

Inside the riser pipe is a space about half a meter in diameter, large enough to hold the spinning drill pipe and bit and to allow the return flow of drilling fluid.

FORBES: The delicate art of sucking up

Drilling holes every few dozen yards and pulling up pipe-shaped samples still leaves acres of mystery.

WSJ: In Geology, Old-Timers Can Be Worth Their Weight in Gold