دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The strain of material under axial force.

n: See axial deformation.

n: The process that superpolymer is destroied by the microbe and macromolecule fractures to micromolecule.

breaking down alkanes by bacterial action. Common by psedomonis and ultramonis bacteria and other bacterial strains that digest parts of the crude oil structures. Useful for remediating oil spills or tank bottom residuals.

n: an area of reduced diameter in pipe caused by excessive longitudinal strain or by a combination of longitudinal strain and the swaging action of a body. A bottleneck may result if the downward motion of the drill pipe is stopped with the slips instead of the brake.

n: the ratio of the intensity of stress to the volume of strain produced by stress.

n: The ratio between the consumed work of breaking the rock and flexible strained work before breaking the rock when measuring hardness of rock with Shis hardness tester.

n: plastic deformation of metal at a temperature low enough to insure or cause permanent strain.

n: 1. the point at which, in terms of temperature and pressure, a fluid cannot be distinguished as being either a gas or a liquid, i.e., the point at which die physical properties of a liquid and a gas are identical. 2. one of the places along die length of milling line at which strain is exerted as pipe is run into or pulled out of the hole.