18 July 2017
An internal combustion engine can, temporarily, develop at any speed a maximum usable horsepower; also, can temporarily, run at much higher speeds than economically feasible with […]
10 November 2021
The effective density of the circulating fluid in the wellbore resulting from the sum of the hydrostatic pressure imposed by the static fluid column and the […]
25 July 2017
The shift of duty on a drilling rig that starts in the afternoon and runs through the evening. Sometimes called afternoon tour. Compare daylight tour, graveyard […]
18 July 2017
A well drilled to permit more effective extraction of oil from a reservoir. Sometimes called a development well.
18 July 2017
A well drilled either in search of an as yet undiscovered pool of oil or gas (a wildcat well) or to extend greatly the limits of […]
18 July 2017
When explosives are used to fracture a formation. At the moment of detonation, the explosion furnishes a source of high-pressure gas to force fluid into the […]
25 July 2017
Said of equipment or a system so constructed that, in the event of failure or malfunction of any part of the system, devices are automatically activated […]
18 July 2017
The end of the drilling line that is affixed to the drum or reel of the drawworks, so called because it travels with greater velocity than […]
25 July 2017
A break in the earth’s crust along which rocks on one side have been displaced (upward, downward, or laterally), relative to those on the other side.
25 July 2017
The act of unwinding a cable from a drum. Also a device on a drilling rig that keeps the weight on the bit constant, and lowers […]
18 July 2017
1) a geographical area in which a number of oil or gas wells produce from a continuous reservoir. A field may refer to surface area only […]
18 July 2017
To pump drilling fluid into the wellbore while the pipe is being withdrawn to ensure that the wellbore remains full of fluid even though the pipe […]
