A rack that supports the tops of the stands of pipe being stacked in the derrick or mast. It has several steel finger-like projections that form […]

An object that is left in the wellbore during drilling or workover operations and that must be recovered before work can proceed. It can be anything […]

Operations on the rig for the purpose of retrieving from the wellbore sections of pipe, casing, or other items which may have become stuck or inadvertently […]

A tool designed to recover equipment lost in a well.

To tie a piece of cloth or other marker on a bailing or swabbing line to enable the operator to know the depth at which the […]

The act of making the final connection on the piping system. Also in oilfield slang it refers to the completion of any operation. Frequently refers to […]

An open flame used to dispose of unwanted gas around a completed well.

See Floating offshore drilling rig.

A special coupling device inserted one or two joints above the bottom of the casing string that contains a check valve to permit fluid to pass […]

A type of mobile offshore drilling unit that floats and is not in contact with the seafloor (except with anchors) when it is in the drilling […]

Abnormal thickening of drilling fluid due to chemical and physical reaction.

See rotary helper.