دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a flow control valve that provides some control when running or pulling a string.

n: 1. a valve used to regulate back-pressure on equipment or systems through which a fluid flows. 2. a valve used to regulate automatically a uniform pressure on the inlet side of the valve.

n: the depositional environments associated with a shallow lagoon shoreward from a coastal barrier island. These environments are highly variable and may include tidal channels, salt marshes, shell reefs, and mangrove swamps, among others.

v: to reverse the flow of fluid from a water injection well to get rid of sediment that has clogged the wellbore.

v: The verb form of backwashing.

n pl: a large, widely distributed group of typically one-celled microorganisms. See anaerobic bacteria, sulfate reducing bacteria.

n: Refers to the microbe that makes drilling fluid decrease filtration rate and viscosity due to it can destroy amylum additive.

n: 1. a partial restriction, generally a plate, placed to change the direction, guide the flow, or promote mixing within a tank or vessel. 2. a device that is seated on the bit pin, in a tool joint, or in a drill pipe float, to centralize the lower end of a go-devil while permitting the bypass of drilling fluid.

n: A replaceable metal ring inserted in the BHA (q.v.) to act as a landing collar for a survey tool.

n: a cylindrical steel bar (similar to the handle or bail of a bucket, only much larger) that supports the swivel and connects it to the hook. Sometimes, the two cylindrical bars that support the elevators and attach them to the hook are called bails or links. v: to recover bottomhole fluids, samples, or drill cuttings by lowering a cylindrical vessel called a bailer to the bottom of a well, filling it, and retrieving it.

n: A rounded steel bar that supports the swivel and connects it to the hook. May also apply to the steel bars that connect the elevators to the hook (links).

remove solids or fluids from a well.