The cutting or boring element used in drilling oil and gas wells. The bit consists of a cutting element and a circulating element. The circulating element […]

A heavy plate that fits in the rotary table and holds the drill bit while it is being made up in or broken out of the […]

A report that lists each bit used during a drilling operation, giving the type, the footage it drilled, the formation it penetrated, its condition, and so […]

An integral part of a blowout preventer, which serves as the closing element on an open hole. Its ends do not fit around the drill pipe […]

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 […]

The discharge pipe from a well being drilled by air drilling. The blooey line is used to conduct the air or gas used for circulation away […]

An uncontrolled flow of gas, oil, or other well fluids into the atmosphere. A kick warns of the possibility of a blowout.

One of several valves installed at the wellhead to prevent the escape of pressure either in the annular space between the casing and drill pipe or […]

(slang) an inexperienced rig or oilfield worker; sometimes shortened to weevil.

A thick-walled container, usually steel, used to hold devices that determine and record pressure or temperature in a wellbore. See bottomhole pressure.

The adhering or joining together of two materials (as cement to formation). v to adhere or to join to another material.

An electronic system for communicating critical control functions from the rig floor to the BOP stack. The system incorporates two communicating controllers, one receiving a command […]