دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A one way valve installed at the bottom of drill pipe and above drill bit. Allowing drill fluid flowing from top to bottom in drill pipe.

n: a container in which various chemicals are mixed prior to addition to drilling fluid.

n: A container in which soluble chemicals can be mixed with a limited amount of fluid prior to addition to the circulating system.

n: a method of severing steel pipe in a well by applying high-pressure jets of a very corrosive substance against the wall of the pipe. The resulting cut is very smooth.

n: a fishing tool that uses high-pressure jets of chemicals to sever casing, tubing, or drill pipe stuck in the hole.

n: The cutting tool with ejecting opening in the bottom.

a pipe cutting tool that uses boron trifluoride sprayed through a nozzle at very high velocities.

n pi: in drilling-fluid terminology, a chemical is any material that produces changes in the viscosity, yield point, gel strength, fluid loss, and surface tension.

n: In drilling-fluid terminology, a chemical is any material that produces changes in the low-shear-rate viscosity, yield point, gel strength, fluid loss, pH, or surface tension.

a V-shaped seal very common on moving and static seals.

a V-shaped pattern on a fatigue or brittle-fracture surface. The pattern may also be one of straight radial lines on round specimens.

a clay type marked by high iron content. Usually not water sensitive and only slowly acid soluble. Very occasionally existing as fragile, free standing rims following sand grain dissolution over geologic time.

n: in crane operations, the angle between the vertical part and choked part of a choker sling. As this angle decreases, the load-lifting capacity of the sling also decreases. See choker sling.