دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a special wire mesh installed in a shale shaker that allows liquid mud to pass through hit traps die cuttings and larger solid particles the mud carries from the hole. Often, more than one screen is installed in the shale shaker;also, the screens are usually vibrated to help remove die cuttings and solids on top of die screen.

n: A small pit, typically located immediately after the shaker screens, which is used as a settling pit to separate coarser solids that accidentally bypass the shakers. Mud enters the pit at one side and exits via an overflow at the other. Sand traps are dum

n: the termination of a shale bed. shale shaker n: a vibrating screen used to remove cuttings from the circulating fluid in rotary drilling operations. The size of the openings in the screen should be selected carefully to be the smallest size possible to allow 100 percent flow of the fluid. Also called a shaker.

n: a blowout preventer that uses shear rams as closing elements.

n: A type of vertical seismic profile in which the source is a shear-wave source rather than a compressional-wave source. Shear waves travel through the Earth at about half the speed of compressional waves and respond differently to fluid-filled rock, and so

n: this is the relative velocity of the fluid layers, divided by their normal separation distance. See also viscosity.

the rate of shearing of a fluid during a viscosity measurement. The rate of movement between plates.

n: a type of pressure relief valve in which excess pressure causes a shearing action on a pin to relieve pressure. See pressure relief valve.

n: see gel strength.

n: a measure of the shear value of fluid. The nminimum shearing stress that will produce permanent deformation. See gel strength.

the minimum shear stress that will produce permanent deformation of the fluid (gel breaking).

n: viscosity reduction of non- Newtonian fluids (e.g., polymers, most slurries and suspensions, and lube oils with viscosity-index improvers) under conditions of shear stress.

n: The effect that the viscosity of some non-Newtonian fluid will decrease at the shear pressure .



a fluid that when sheared, reduces viscosity.

n: The behavior that the viscosity of non-Newtonian fluid will decrease when velocity increase.