دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: a device, operated by air or hydraulic fluid, that fits into the opening in the rotary table when the drill stem must be suspended in the wellbore (as when a connection or trip is being made). Automatic slips, also called power slips, eliminate the need for roughnecks to set and take out slips manually. See slips.

n: A tool operated by pneumatics or hydraulic pressure.Used for chafing the drill stem when pipe connection or tripping.

n: The bearing that can prevent the rotary table jumping due to the component force of gear.

n: a special device that fits into a bit breaker adapter (a plate that goes into the rotary table) and conforms to the shape of the bit. Rig workers place the bit to be made up or broken out of the drill stem into the bit breaker and lock the rotary table to hold the bit breaker and bit stationary so that they can tighten or loosen the bit.

a heavy plate that can hold the bit in the rotary table to make or break it from the drill string.

n: a heavy plate that fits into the rotary table and holds the bit breaker;a device used to hold the bit while it is being made up or broken out of the drill stem.

n: a heavy plate that fits in the rotary table and holds the drill bit while it is being unscrewed from the drill collar. See bit breaker.

n: See bit breaker.

below rotary table.

n: on a mechanical-drive rig, the type of transmission that sends power from the engines to the drawworks and the rotary table, and sometimes to the mud pumps. See also transmission.

n: The driving gear that is assembled by several power machines.

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: The drill rig whose drawworks, rotary table and drilling pump are driven by direct current motor. The direct current motor is driven by diesel engine or gas turbine.