دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the cable attached to a bailer, passed over a sheave at the top of the derrick, and spooled on a reel.

n: The wire rope connected with bailer, winded to the drum through the pulley on the top of crown block.

n: any assembly of pulleys on a common framework;in mechanics. one or more pulleys. or sheaves. mounted to rotate on a common axis. The crown block is an assembly of sheaves mounted on beams at the top of the derrick or mast. The drilling line is reeved over the sheaves of the crown block alternately with the sheaves of the travelling block. which is hoisted and lowered in the derrick or mast by the drilling line. When elevators are attached to a hook on a conventional travelling block. and when drill pipe is latched in the elevators. the pipe can be raised or lowered in the derrick or mast. See crown block, travelling block.

a pulley (sheave) or set of pulleys, mounted in a housing. The blocks on a rig are the crown (stationary) block at the top of the derrick and the traveling block.

n: The pulley used to sustain catline, installed near the top of derrick.

n: I. the crown block or top of a derrick or mast. 2. the top of a piston. 3. a high spot formed on a tool joint shoulder as the result of wobble.

n: The top of the derrick containing the blockline sheaves.

high point.

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.

n: the working platform at the top of the derrick or mast that permits access to the sheaves of the crown block and provides a safe working area for service to the gin pole. See crown block.

n: See water table.

n: See crown block.

n: The wheel twisting deadline in crown block.