دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the pressure at the bottom of a borehole. It is caused by the hydrostatic pressure of the wellbore fluid and, sometimes, by any back-pressure held at the surface, as when the well is shut in with blowout preventers. When mud is being circulated, bottomhole pressure is the hydrostatic pressure plus the remaining circulating pressure required to move the mud up the annulus. 2. the pressure in a well at a point opposite the producing formation, as recorded by a bottomhole pressure bomb.

n: The pressure at the bottom of the borehole, or at a point opposite the production formation.

n: The act of adding commercial materials to convert water or a water-clay slurry into a mud. Mudding up is usually done after drilling a well to a certain depth with relatively inexpensive spud mud or other native-clay mud, or with water or air. By delaying

increasing the density of the mud.