A.heavy-walled drill pipe
B.tool joint
C.down hole tool
D.drill collar
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A.main brace
B.tow span
C.jockey bar
D.None of the above
A.one sidelight
B.one sidelight and a masthead light
C.one sidelight and two masthead lights
D.both sidelights of a vessel and her masthead light(s)
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
A.information or regulatory buoy that has lateral significance
B.buoy that is off-station and is marked to warn mariners of its wrong position
C.dual purpose marking used where the ICW and other waterways coincide
D.buoy that was set in error and will be replaced with a red nun buoy
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
最新試題
A jack-up drilling rig being towed must（）.
An inert gas system on a tanker should be used to（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
A fishing vessel casualty must be reported to the Coast Guard if it involves（）.
A fishing vessel displaying the lights shown is（）.
A large basin cut into the shore，closed off by a caisson，and used for dry docking of ships is known as a（）.
An obstruction on a helodeck is any object that might present a hazard to the（）.
A large valve，usually installed above the ram preventers，that forms a seal in the annular space between the pipe and wellbore or，if no pipe is present，on the wellbore itself is called the（）.
An inert gas system installed on a tanker is designed to（）.
After sending a message describing the symptoms of an ill crew member，you receive a message containing the code MRL. This means（）.