دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the rotary drilling system that uses a conventional swivel, a kelly, a kelly drive bushing, a master bushing, and a rotary table to turn the drill stem and bit. Compare top drive.

n: on a top-drive unit, the device that attaches the unit to the guide rails. See guide rails, top drive.

n: seamless steel or aluminum pipe made up in the drill stem between the kelly or top drive on the surface and the drill collars on the bottom. During drilling, it is usually rotated while drilling fluid is circulated through it. Joints of pipe about 30 feet long are coupled together by means of tool joints.

n: A heavy seamless pipe uesd to rotate the bit and circulate the drilling fluid. Lengths of drill pipe 30 ft long are coupled together with tool joints to make the drill string.

a heavy wall tubing used for drilling.

n pi: see kelly bushing rollers. drive shaft n: in a top drive, d1e shaft that comes out of the drives drilling motor. Usually, crew members attach a saver sub (a short pipe fitting) to the drive shaft and attach the top joint of drill pipe to the sub. The drive shaft transmits the motors rotating fon:e to the drill string and bit. See top drive.

n: refer tokelly bushing rollers

n pl: on conventional rotary rigs and top-drive rigs, hinged steel devices with manual operating handles that crew members latch on to a tool joint (or a sub). Since the elevators are directly connected to the traveling block, or to the integrated traveling block in the top drive, when the driller raises or lowers the block or the topdrive unit, the drill pipe is also raised or lowered.

the snap-around latches that couple around tubing below the pipe coupling and enables the traveling block on a rig to gab and lift the tubular string.

n pl: on some top drives, the steel tracks on which the top-drive unit travels up and down when the driller raises or lowers the traveling block. The rails also keep the unit from turning when its motor rotates the drill stem. Compare torque track, torque tube. See also top drive.

n: anyone of several types of valve installed in the drill stem or in a top drive to prevent highpressure fluids from flowing up the drill stem and into the atmosphere. Flow is possible only downward, allowing mud to be pumped in but preventing any flow back up the stem. Also called an internal blowout preventer.

n: A valve in the drillstring that may be used to prevent the well from flowing uncontrollably up the drillstring.

a valve installed inside the drill stem to prevent flow up the inside of the pipe.

n pi: on a top drive, a device that, when actuated by the driller, tilts the units built-in elevators into a position to make it easy for crew members to latch the elevators onto a joint of pipe stored in the mousehole. See top drive.

n: in a top drive, the power and spinning wrenches built into the unit that spins, makes up, breaks out, and backs up the pipe. See top drive.

n: the main device of top drived drilling system.

n: a steel-reinforced, flexible hose that is installed between the standpipe and the swivel or top drive. It conducts drilling mud from the standpipe to the swivel or top drive. Also called the kelly hose or the mud hose.

n: a reinforced flexible tube that conducts drilling fluid from the standpipe to the swivel. also calledkelly hose or mud hose.

the connection from the mud pump to the stand pipe. Also called the mud hose or kelly hose.