简答题 翻译：The casing and tubing used to bring crude oil to the surface is suspended underneath a wellhead or Christmas tree.

翻译：Other instruments used in gravity work are the torsi...

问答题翻译：Other instruments used in gravity work are the torsion balance and the pendulum.These instruments, however, have been practically replaced by the gravimeter.

翻译：The permeability of a porous medium may be determine...

问答题翻译：The permeability of a porous medium may be determined from samples extracted from the formation or by in-place testing.

翻译：The main function of a rotary rig is to drill a hole...

问答题翻译：The main function of a rotary rig is to drill a hole, or as it is known in the industry, to make hole.