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 […]

The assembly of well control equipment including preventers, spools, valves, and nipples connected to the top of the casinghead.

A device designed or form a seal on the hole with no pipe or in the annular space with pipe in the hole. The equipment can […]

A hole made by drilling or boring. See wellbore.

A type of mobile offshore drilling unit (MODU) that has a part of its structure in contact with the sea floor when it is on site […]

The lowest or deepest part of a well. adj pertaining to the bottom of the wellbore.

A device with a restricted opening placed in the lower end of the tubing to control the rate of flow. See Choke.

1) the pressure at the bottom of a borehole. It is caused by the hydrostatic pressure of the wellbore fluid and, sometimes, by any back-pressure held […]