دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

placement of a fluid in the wellbore with coiled tubing where the fluid is spotted at the bottom of the zone and the CT is withdrawn at the same rate the hole is filled.

n: Forming a layer of cementing material of solid grains on the wall of hole when the drilling fluids infiltrating into the layer.

n: also called filter cake or mud cake. See filter cake.

n: The residue deposited on a permeable medium when a slurry, such as a drilling fluid, is forced against the medium under a pressure. Filtrate is the liquid that passes through the medium, leaving the cake on the medium. Drilling muds are tested to determin

filter cake.

n: The wall scraper fixed under the casings ectooecium,which be used to clean the wall cake
of hole wall.

n: a device used in fishing for drill pipe. If the upper end of the lost pipe is leaning against the side of the wellbore, the wall hook centers it in the hole so that it may be recovered with an overshot, which is run on the fishing string and attached to the wall hook.

n: A fishing assistant tool be used to fish the lost drill string ,which can help to centralizing the drill string .

a device at the bottom of an overshot for centering the upward looking end of pipe that may be laying against the casing. The hook may resemble a finger or strip of metal pointing clockwise and used with pipe rotation to surround and center the pipe.

n: A fishing assistant tool be used to fish the lost drill string ,which can help to centralizing the drill string .

n: The wall scraper fixed under the casings ectooecium,which be used to clean the wall cake
of hole wall.

n: A circular brush made by steel wire,which can scratch off the wall cake and develop the quality of cementing.

n: see differential sticking.

n: A condition whereby the drillstring cannot be moved (rotated or reciprocated) along the axis of the wellbore. Differential sticking typically occurs when high-contact forces caused by low reservoir pressures, high wellbore pressures, or both, are exerted