دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a braking mechanism on the drawworks, supplemental to the mechanical brake, that permits the lowering of heavy hook loads safely at retarded rates without incurring appreciable brake maintenance. There are two types of auxiliary brake-the hydrodynamic and the electrodynamic. In both types, work is converted into heat, which is dissipated through liquid cooling systems. See electrodynamic brake, hydrodynamic brake.

n: The additional device of mechanical brake.Decreasing the maintenance of brake system and making landing heavy loading safe. There are two kinds of forms: one is hydrodynamic, the other is dynamic.

n: a cylindrical steel bar (similar to the handle or bail of a bucket, only much larger) that supports the swivel and connects it to the hook. Sometimes, the two cylindrical bars that support the elevators and attach them to the hook are called bails or links. v: to recover bottomhole fluids, samples, or drill cuttings by lowering a cylindrical vessel called a bailer to the bottom of a well, filling it, and retrieving it.

n: A rounded steel bar that supports the swivel and connects it to the hook. May also apply to the steel bars that connect the elevators to the hook (links).

remove solids or fluids from a well.

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.

n: in crane operations, a sling composed of several legs, the tops of which are gathered in a fitting that goes over the cranes lifting hook. See leg.

n: Used to hang casing string when casing running.

n: The hook installed at one end of cathead line. Used for lifting drill tool or equipment to drill floor.

n: See well head set up.

n: a long steel pole with a hook on one end that allows one of the rotary helpers to release the safety latch on the drilling hook so that the bail of the swivel can be removed (as when the kelly is set back prior to making a trip). Also called a shepherds stick, or hook.

n: A long steel arm with hook. The borer uses it to crook safety latch to unload swivel bail from hook.