دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: This schlumberger module provides direct measurements of wellbore fluid resistivity and temperature, also cable tension below the toolstring head. Useful to run in poor hole condition;should allow differentiation of differential sticking and keyseat stic

n: In order to avoid pressure differential sticking,some evaluation tests emulating to prevent sticking with kinds of drill liquid and treating chemical made in the laboratory.

n: a condition in which the drill stem becomes stuck against the wall of the wellbore because part of the drill stem (usually the drill collars) has become embedded in the filter cake. Necessary conditions for differential-pressure sticking, or wall sticking, are a permeable formation and a pressure differential across a nearly impermeable filter cake and drill stem. Also called wall sticking. See differential pressure, filter cake.

n: One of the mechanisms causing stuck pipe by having excessive mud weight.

a common method of pipe sticking where the overbalance pressure in the wellbore pushes the tubing against the side of the wellbore in a permeable formation.

n: sticking of a tool that caused by the pressure of drilling fluid volumn below the pressure of layer.

n: the sticking that caused by the drilling fluid volume above the layer pressure.

refers to drill pipe stuck in the hole from differential sticking or bridging.

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

usually differential sticking (by overbalance),but may also include effect of friction and mud cake adhesion to the tubing or drill string.

n: see differential sticking.