Oil and gas terminology · MLC-0103
Oil and gas terms: J (22)
- J factorA dimensionless capillary pressure function that normalizes capillary pressure curves for different rock...
- J slotA mechanical feature incorporated into downhole tools, consisting of a J-shaped groove that guides a pin or...
- Jacking frameA structural assembly equipped with hydraulic jacks used to lift and support heavy equipment or tubulars...
- JackupA mobile offshore drilling unit with a hull that floats to the drilling location and then extends legs to the...
- Jackup rigA self-elevating mobile offshore drilling unit that floats to the drilling site and then lowers legs to the...
- JarA downhole tool run in the drill string or tubing string that delivers an impact load to free stuck pipe or...
- Jar testA laboratory procedure that evaluates the effectiveness of chemical additives in treating drilling fluid...
- JetA high-velocity stream of drilling fluid expelled from nozzles in a drill bit. The force of the jet cleans...
- Jet cutterA downhole tool that cuts tubing, casing or drill pipe from the inside by firing a shaped explosive charge...
- Jet hopperA device used to mix dry bulk materials, such as drilling fluid additives, into a liquid stream. It operates...
- Jet mixerA device that uses the venturi principle to rapidly and uniformly blend dry powdered additives into drilling...
- Jet nozzleA small, precisely sized opening in a drill bit or other downhole tool that directs a high-velocity stream of...
- Jet perforatingA method of making holes through casing, cement and formation using shaped charges, in which each charge...
- Jet pumpA type of artificial lift system that uses a high-velocity power fluid stream to entrain and lift produced...
- Jet velocityThe speed at which drilling fluid exits the nozzles of a drill bit or other downhole tool. This velocity...
- JointA natural fracture or crack in a rock along which no discernible displacement has occurred, distinguishing it...
- Joule-ThomsonA thermodynamic effect describing the temperature change of a real gas or liquid when it expands...
- Jug hustlerA member of a land seismic crew responsible for deploying, moving, and retrieving geophones, also known as...
- JunkAny unwanted metallic or hard object in a wellbore that obstructs drilling or other operations. Junk can...
- Junk basketA downhole tool designed to retrieve small pieces of junk or debris from the wellbore. It typically consists...
- Junk pusherA downhole tool with a gauge ring or similar full-gauge body that is run to confirm that a tubing or casing...
- Junk subA short, heavy-walled tubular component incorporated into a drill string or workover string, designed to...
22 of 4,469 terms in Oil and gas terminology (MLC-0103). Request the full dataset.