دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the pressure maintained on equipment or systems through which a fluid flows 2. in reference to engines, a term used to describe the resistance to the flowof exhaust gas through the exhaust pipe. 3. the operating pressure level measured downstream from a measuring device4.

n: an eccentrically shaped disk, mounted on a camshaft, that varies in distance from its centre to various points on its circumference. As the camshaft is rotated, a set amount of motion is imparted to a follower riding on the surface of the cam. In the intenal-combustion engine, cams are used to operate the intake and exhaust valves.

n: the device used to seal the top of a cylinder. In modem drilling rig engines, it also houses the valves and has exhaust passages. In four-cycle operation, the cylinder head also has intake passages. Also called head.

v: to exhaust a supply. An oil and gas reservoir is depleted when most or all economically recoverable hydrocarbons have been produced.

n: 1. the exhaustion of a resource.2. a reduction in income reflecting the exhaustion of a resource. The concept of depletion recognizes that a natural resource such as oil is used up over several accounting periods and permits the value of this resource to be expensed periodically as the resource is exhausted.

reducing the fluid content of a formation by production of that fluid.

n: a reduction in US taxes for owners of an economic interest in minerals in place to compensate for the exhaustion of an irreplaceable capital asset. This economic interest includes mineral interest, working interest in a lease, royalty, overriding royalty, production payment interest, and net profits interest.

n: the burned gases that are removed from the cylinder of an engine. v: to remove the burned gases from the cylinder of an engine.