دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The depth that some drill bit drills in the wellbore.

n: the depth of the wellbore when a new bit or other tool is run in. Compare depth out.

n: The well depth that new bit or tool begins descenting down hole.

n: the depth of the wellbore when a bit or other tool is pulled out of the hole. Compare depth in.

n: The well depth when bringing out drill bit or tool.

n: The well whose wellbore deviates from vertical orientation and exceeds deviation angle required by straight hole.

n: A wellbore that is not vertical. The term usually indicates a wellbore intentionally drilled away from vertical.

n: departure of the wellbore from the vertical, measured by the horizontal distance from the rotary table to the target. The amount of deviation is a function of the drift angle and hole depth. The term is sometimes used to indicate the angle from which a bit has deviated from the vertical during drilling. See drift angle.

n: The angle at which a wellbore diverges from vertical. Wells can deviate from vertical because of the dips in the beds being drilled through. Wells can also be deliberately deviated by the use of a whipstock or other steering mechanism. Wells are often dev

n: Controlling the deviation angle and azimuth of wellbore according to borehole axis in directional drilling.

n: The phenomenon that wellbore deviates from vertical orientation in the drilling programe.

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: Schlumberger wireline tool that records shear, compressional and stoneley waveforms. Used for amplitude variation with offset (AVO) calibration, shear seismic correlation, wellbore stability measurements, sanding analysis, fracture height estimation and s