دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in pipeline construction, the process of putting slack in a pipeline to counter the effects of contraction and expansion caused by extreme variations in daily temperature. Instead of laying the pipe in a straight line down the center of a ditch, it is laid so that it alternately touches one side of the ditch or the other, thereby pro- viding a curve or slack in the line.

v: to lower a load or ease up on a line. A driller will slack off on the brake to put additional weight on the bit.

n: A kind of ways to measure the hydropower lifting ability.

the weight reading when the pipe is entering the well. Compared to the pick-up weight to estimate the friction.

n: A specially designed drilling rig capable of drilling directional wells.

n: a metamorphic rock formed when shale becomes buried deeply. The heat and pressure fuse individual mineral grains into slate.

metamorphic shale rock with fractures or cleavage planes.

slick line depth.

n: a tubular part designed to fit over another part.