دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

demigration to zero offset. An improvement in seismic processing over dip movement offset where signal velocity varies significantly with depth.

n: a bit that does not have a uniformly round cross section;instead, the bit has a protuberance that projects from one side. An eccentric bit drills a hole slightly overgauge to compensate for certain formations, such as shale or salt, that deform and enlarge after being drilled. Eccentric bits can also ream undergauge holes.

n: the pterate bit with big and small flushing port and arranged eccentricly

n: the distance from the gauge point on the tank floor or datum plate to the top of the top angle or where the tank contents would begin to overflow.

n: temporary changes in dimensions caused by stress. The material returns to the original dimensions after removal of the stress.

n: the deformation of caused by the effect of overlying-strata pressure which is standed by the rock in the range of elastic limit

deformation of a body in the elastic range, i.e., recovery to the initial shape is possible when the stress or load is removed.

a wireline with a conductor in the middle and woven electrical braid over the conductor.

n: a device that uses a battery, an electric motor, gears, and cables to provide a way of starting an engine. An electrically actuated motor turns the engine over by means of a pinion gear in the starter that engages a ring gear on the engine flywheel.

n: a hydraulic governor on an engine that has a reversible electric motor (it runs both clockwise and counterclockwise). By manipulating a remote control, the engine operator can adjust the electric motor to closely control the engines speed. See governor;hydraulic governor.

n: a multi-bladed propeller usually installed behind an engines radiator, which moves air over an engine. It helps cool the engine and equalizes the temperature of the air as it flows over the engine, thus preventing hot spots. Engine power usually operates the fan, although some fans have auxiliary electric motors that power them when the engine is stopped.

n: (ETS) a device on an engine that senses overheating and shuts down the engine if overheating occurs.

n: (EOR) 1. the introduction of artificial drive and displacement mechanisms into a reservoir to produce a portion of the oil unrecoverable by primary recovery methods. To restore formation pressure and fluid flow to a substantial portion of a reservoir, fluid or heat is introduced through injection wells located in rock that has fluid communication with production wells. See alkaline (caustic) flooding, gas injection, micellar-polymer flooding, primary recovery, secondary recovery, tertiary recovery, thermal recovery, waterflooding. 2. the use of certain recovery methods that not only restore formation pressure but also improve oil displacement or fluid flow in the reservoir. These methods may include chemical flooding, gas injection, and thermal recovery.

one or more of a variety of processes that seek to improve recovery of hydrocarbon from a reservoir after the primary production phase.