A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a ______.
A.heavy-walled drill pipe
B.tool joint
C.down hole tool
D.drill collar
第1题：
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 ______.
A.annular blowout preventer
B.annulus
C.accumulator
D.automatic choke
第2题：
A heavy steel device that is set on the sea floor and used as a drilling template in offshore drilling operations is called a ______.
A.temporary guide base
B.permanent guide base
C.guide frame
D.foundation template
第3题：
A. sliding sheet
B. sliding board
C. banana board
D. sling
第4题：
重吊杆用于吊大的重件。（）
第5题：
第6题：
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
第7题：
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a ______．
A.String
B.Stand
C.Joint
D.Standpipe
第8题：
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the ______.
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
第9题：
测深管（）
第10题：
as a connecting strap between the butted ends of plating
to stiffen areas under points of great stress between beams
to prevent the anchor from fouling when the brake is released
to provide an extra heavy fitting in a heavy lift cargo rig