دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a technique used in directional drilling to deviate the wellbore by washing away the formation in one particular direction.a special bit (badger bit) is used that has one enlarge nozzle that must be orientated towards the intended direction.

v: to create holes through the casing with a shaped charge of high explosives instead of a gun that fires projectiles. The loaded charges are lowered into the hole to the desired depth. Once detonated, the charges emit short, penetrating jets of high- velocity gases that make holes in the casing and cement for some distance into the formation. Formation fluids then flow into the wellbore through these perforations. See bullet perforato1;gun-perforate.

n: a device made up on the bottom of the fishing string to catch and retrieve pieces of junk from the bottom of the hole.

n: a cyclindrical tool designed to retrieve junk or foreign objects loose in a wellbore.

may also be called a Jet Basket: a device with nozzles and a basket or catch basin to catch smaller pieces of junk stirred up by circulation.

n: an entry of water, gas, oil, or other formation fluid into the wellbore during drilling. It occurs because the pressure exerted by the column of drilling fluid is not great enough to overcome the pressure exerted by the fluids in the formation drilled. If prompt action is not taken to control the kick. or kill the well, a blowout may occur. See blowout.

n/v: an entry of formation fluids (oil,gas or water) into the wellbore,caused by the formation pressure exceeding the pressure exerted by the mud column.

an unwanted flow of fluids from a formation into the wellbore. Can happen during drilling, completions or interventions.

v: 1. to bring a well into production;used most often when gas is injected into a gas lift well to start production. 2. in workover operations, to swab a well to restore it to production. 3. to deviate a wellbore from the vertical, as in directional drilling.

n: (KOP) the depth in a vertical hole at which a deviated or slant hole is started;used in directional drilling.

n: the depth at which the wellbore is deliberately deviated from the vertical.

v: 1. in drilling, to control a kick by taking suitable preventive measures (e.g., to shut in the well with the blowout preventers, circulate the kick out, and increase the weight of the drilling mud). 2. in production, to stop a well from producing oil and gas so that reconditioning of the well can proceed. Production is stopped by cir- culating a kill fluid into the hole.

v: To stop a well from flowing or having the ability to flow into the wellbore. Kill procedures typically involve circulating reservoir fluids out of the wellbore or pumping higher density mud into the wellbore, or both. In the case of an induced kick, where

a term used to describe various methods to stop flow from a well. Commonly pumping a kill weight fluid into a well to create an overbalance into the formation.

a liquid with a density sufficient so that a full column of the fluid would control the well and prevent fluid entry into the wellbore from any exposed formation.

n: the pressure exerted by the mud pump (and read on the standpipe or drill pipe pressure gauge) when the pumps speed is reduced to a speed lower than that used during normal drilling. A kill rate pressure or several kill rate pressures are estab- lished for use when a kick is being circulated out of the wellbore. Also called p-low.

n: the delivery capacity pressure of pump that circulates the kill well fluid and discharges the overflow or suppresses well blowout.

n: a mud whose density is high enough to produce a hydrostatic pressure at the point of influx in a wellbore and shut off flow into the well.