دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a glass-stem thermometer totally encased in a glass sheath, which provides air space between the thermometer and the liquid in which the unit is immersed.

n: a device secured around the casing at regular intervals to centre it in the hole. Casing that is centralised allows a more uniform cement sheath to form around the pipe.

n: The cyclic cement stone formed by cement slurry solidifying in the annular between casing and wellbore.

n: The cementing method that pumping delayed setting cement into drill pipe before casing installation and tripping the bottom of casing or liner into uncured cement slurry. It can make cement sheath outside the casing more smooth.

n: the phenomenon of bouncing and slowing that caused by mud sheath on drilling bit when the hole bottomis not clear .

n: the mud sheath that exist in hole pores.

filtration control by particles smaller than the pore bridging size that invade the pores and bridge within the pore throats. Often very difficult to remove.

n: the sheath of mud solids that forms on the wall of the hole when liquid from mud filters into the formation. Also called filter cake or wall cake.

n: also called filter cake. See cake.

the filter cake on the formation formed by dehydration of the solids as the liquid part of the mud (filtrate) leaks off into the formation.

n: the cementing operation that takes place immediately after the casing has been run into the hole. It provides a protective sheath around the casing, segregates the producing formation, and prevents the undesirable migration of fluids.

n: placing cement around the casing immediately after it has been run into the hole.

the first attempt at creating a cement seal in the annulus.

a jacket or armour, often around a logging cable, a gauge cable, or a pump cable.