These are air or hydraulic elevators operated on bails hanging below the traveling equipment, which provide a remote opening and closing of the elevator without human […]

See Slips.

The utility functions associated with a traditional mousehole, such as hoisting, lowering, rotating, and grabbing or actuating with a slip assembly. Usually associated with facilitating offline […]

The initial nitrogen charge in the accumulator. The nitrogen gas charge is compressed by the pumps hydraulically charging the accumulators and is used to expel the […]

The force that a fluid (liquid or gas) exerts uniformly in all directions within a vessel, pipe, hole in the ground, and so forth, such as […]

An instrument that measures fluid pressure and usually registers the difference between atmospheric pressure and the pressure of the fluid by indicating the effect of such […]

A scale of pressure differences in which there is a uniform variation of pressure from point to point. For example, the pressure gradient of a column […]

A valve that opens at a preset pressure to relieve excessive pressures within a vessel or line. Also called a pop valve, relief valve, safety valve, […]

Shortened form of blowout preventer. See Blowout Preventer.

The cementing operation that takes place immediately after the casing has been run into the hole. It provides a protective sheath around the casing, segregates the […]

An internal-combustion engine or a turbine that is the source of power for driving a machine or machines.

1) the phase of the petroleum industry that deals with bringing the well fluids to the surface and separating them and with storing, gauging, and otherwise […]