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單項(xiàng)選擇題

A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the（）.

A.lifts
B.collars
C.elevators
D.clamps

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單項(xiàng)選擇題

A series of trays with sieves that vibrate to remove cuttings from the circulating fluid in rotary drilling operations is called the（）.

A.shale shaker
B.settling pit
C.desilter
D.desander

單項(xiàng)選擇題

A semisubmersible with a positive GM，and TCG located starboard of the centerline，inclines to an angle of（）.

A.heel
B.trim
C.list
D.loll