دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a specialised form of intermittent-flow gas lift that functions in the same way as other forms, except that, when the injection gas is off, incoming well fluids accumulate in a chamber having a larger diameter than the tubing. For the same volume of fluid, hydrostatic head and wellbore pressure at the formation are both reduced.

an interconnected pathway through the matrix of the rock or an open fracture or other feature that connects a reservoir and the wellbore.

to run a pipe through a wellbore to determine if it is open.

n: A method of cutting pipe in the wellbore. Jetting the pipe with hi-pressure acrid material.

n: the holding of formation rock chips in place as a result of high differential pressure in the wellbore (i.e., pressure in the wellbore is greater than pressure in the formation). This effective- its the cutting action of the bit by retarding circulation of bit cuttings out of the hole.

n: a pipe attached to the blowout preventer stack out of which kick fluids and mud can be pumped to the choke manifold when a blowout preventer is closed in on a kick.

n: A high-pressure pipe leading from an outlet on the BOP stack to the backpressure choke and associated manifold. During well-control operations, the fluid under pressure in the wellbore flows out of the well through the choke line to the choke, reducing th

a drilling and workover pressure control device. A line that attached to the BOP stack and through which kick fluids can be circulated when the BOP is closed.

v: to pass from one point throughout a system and back to me starting point. For example, drilling fluid is circulated out of the suction pit, down the drill pipe and drill collars, out the bit, up the annulus, and back to the pits while drilling proceeds.

v: To cycle drilling fluid through the drill string and wellbore, returning to the mud pits. This operation is carried out during drilling and is also used to condition the mud while drilling is suspended.

establishing flow down the tubing or drill pipe and up the annulus. Reverse circulating involves injecting down the annulus and up the drill pipe.

n: see concurrent method.

n: A kind of well killing method of handling blowout. Increasing the weight of drill fluid and pumping it into the wellbore at the same time after well shuting in and requesting casing pressure. Completing well killing in a loop cycle.

n: an external gripping tool that allows direct circulation through the tool and the fish to keep the wellbore lubricated during fishing. See overshot.

n: The process of cleaning wellbore by circulating drill fluid.