Difference between bottomhole pressure (BHP) and choke pressure due to friction; a function of flow rate, hole geometry, surface roughness, fluid properties.

An arched, inverted-trough configuration of folded rock layers. Compare Syncline.

The measure of the density of gravity of liquid petroleum products in the United States; derived from relative density in accordance with the following equation: API […]

See Driller’s chair.

A remote controlled or automated system for cleaning and lubricating the drill pipe connections while tripping in the hole. Often times connected to a set of […]

A system of a control unit and drilling mud mixing equipment where the drilling mud mixing process can be automated, either to preset drilling mud properties […]

A mechanized or automated mud capturing device that also provides spray protection for the crew when pulling a wet string tripping out of the hole. Typically […]

A system with an automatic dustproof machine able to cut smaller sacks with powder. It separates powder into a feeding unit toward the mud mixer and […]

A PLC controlled flow distribution and remote valve controlled system to ensure even flow distribution to all shakers including a start up procedure when flow is […]

A mechanism used to regulate the amount of weight on the bit without the continual control by drilling personnel. Automatic drillers free the driller from the […]

A system used by ships and vessel traffic services (VTS), principally for identifying and locating vessels.

A remotely controlled, actuated, and/or reset high pressure mud pump discharge relief valve. This system may be remotely operated or controlled electronically, pneumatically, hydraulically or in […]