钻杆

QW50A气动卡瓦是油田修井作业时，安装在井口上用于卡紧油管及类似管柱的一种工具。

offshore drilling

drilling out (boring out)

measured drilling depth

slip-type elevators with deep-well drilling rods

drill (drilling, boring, borehole)

dowel hole drilling machine

surface drive for combined percussion and rotary drilling in deep drilling

offshore drilling platform