دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: special class of inhibited chemical muds using as their bases sodium silicate, salt. water. and clay.

n: a pattern of drum spooling in which the wore rope travels in a two-step grooving pattern but has flat or level areas for crossing over to act as shock absorbers for the rope and to reduce the rise or hump produced in all multiwrapping of wire rope.

n: water that is free of calcium or magnesium salts. Compare hard water.

water with low calcium and magnesium content.

n: A system used to control and process the performance of drilling fluids,which consists of mud desander,de-gasser,sand filter,desilter and agitator etc.

n: A blank sheet that setting up at the area of cleaners bolting cloth when clean up the soft drilling fluid

n: the devices installed in the mud circulating system that remove such solids as sand, silt, and other particles that may be in the drilling mud.

a substance that will dissolve a solid. In the oil field, oil based solvents may range from xylene for asphaltenes and sludges, to kerosene and diesel/xylene mixtures for paraffins.

n: a type of acoustic log that records the travel time of sounds through objects, cement, or formation rocks. Often used to determine whether voids exist in the cement behind the casing in a well bore.

a sonic log measures the interval travel time (delta t) of compression sound waves moving through one foot of a formation (milliseconds/ft). If matrix velocity is known, porosity can be calculated since sound waves travel slower in porous media (travel sl

n: see acoustic well logging. sonic meter n: see ultrasonic mete,;

n: A type of acoustic log that displays traveltime of P-waves versus depth. Sonic logs are typically recorded by pulling a tool on a wireline up the wellbore. The tool emits a sound wave that travels from the source to the formation and back to a receiver.

n: a two-piece kelly bushing that is secured by holddown nuts and bolts passing from the top of the bushing to the bottom of the bushing. Compare solid-body kelly bushing. See also kelly bushing.