دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The circulating method that the drilling fluid is pumped from annular and returns from drill pipe.

n: the place at each end of the drawworks drum where the drilling line being spooled onto or off of the drum stops moving in one direction and starts moving in the other direction. Also called turn back. crossover joint n: a length of casing with one thread on the field end and a different thread in the coupling, used to make a changeover from one thread to anod1er in a string of casing.

n: A sub that is used to connect drill string components that have different threads or sizes.

a section of the treating string that transfers incoming flow from inside the pipe to the annulus below the crossover, and the return flow from inside the tubing to the annulus above the crossover. Straddles a packer.

n: See crossover.

n: see angle-control section.

n: a sub that allows different sizes and types of drill pipe to be joined.

n: See adapter.

a short section of pipe with the proper threads cut into each end to join two pieces of pipe or equipment that do not have matching connections.

n: an assembly of sheaves mounted on beams at the top of the derrick or mast and over which the drilling line is reeved. See block, reeve the line. sheave.

n: An assembly of sheaves or pulleys mounted on beams at the top of the derrick over which the drilling line is reeved.

the set of pulleys or sheaves at the top of the mast on a rig.

government owned land.

abbr: the correction for temperature of steel;a factor used during proving to adjust the temperature of the prover steel to a standard temperature.