دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see open-hole completion.

a very simple, open hole pay zone completion with a minimum of downhole equipment. Also called an open hole completion. The casing is usually run to the top of the pay and is cemented above the pay only.

n: an integral part of a blowout preventer. which serves as the closing element on an open hole. Its ends do not fit around the drill pipe but seal against each completely. See ram.

n: one of several valves installed at the wellhead to prevent the escape of pressure either in the annular space between the casing and the drill pipe or in open hole (i.e., hole with no drill pipe) during drilling or completion operations. Blow- out preventers on land rigs are located beneath the rig at the lands surface;on jackup or platform rigs, at the waters surface;and on floating offshore rigs, on the seafloor. See annular blowout preventet;ram blowout preventer:

a conditional surface pressure barrier often consisting of a set of hydraulically operated rams containing equipment designed to grip pipe, seal around pipe, shear off pipe or seal an open hole during drilling or a workover. It may also contain an annular

n: 1. an obstruction in the borehole, usually caused by the caving in of the well or the borehole or by the intrusion of a large boulder.2.a tool placed in the hole to retain cement or other material;it may later be removed, drilled out, or left permanently.

n: An obstruction in the borehole, caused by a buildup of material such as scale, wellbore fill, or cuttings that can restrict wellbore access or, in severe cases, eventually close the wellbore . In open hole a bridge usually caused by the caving in of the w

a blockage in the wellbore caused by a mass of particles that lock together and prevent pipe movement or flow.

a completion that uses flow to purposely increase the size of the open hole wellbore.

n: 1. a portion of cement placed at some point in the well bore to seal it. 2.a wiper plug. See cementing, wi per plug.

n: (1) a portion of cement placed at some point in the wellbore to seal off the well;(2) a device used during a primary cement job to separate the cement slurry from contaminating fluids in the casing. A wiper plug is pumped ahead of the slurry and a shut-o

a plug of cement set by various methods that plugs the tubulars or the open hole.

n: The coring tool that acquires core from borehole face of open hole.

n: Schlumberger wireline fishing tool which can retrieve ferrous junk in cased or open hole.

a class of pipe that can be expanded for cladding corroded or worn casing, saving room in a completion, casing open hole, sealing off perforations, etc.