دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: (Ev) a mathematical expression that relates the velocity of the fluid flowing in the meter tube upstream from the orifice to the velocity of the fluid flowing through the orifice.

n: the component of the pressure of a moving fluid that is due to the fluids velocity and that is commonly equal to the difference between the impact pressure and the static pressure.

n: the result of a velocity traverse. When fluid flows in a pipe, the fluids velocity is not uniform owing to friction as the fluid moves past the pipes walls. With some measuring devices, it is important that the device be placed properly within the flow to obtain accurate measurement. Running a velocity traverse to obtain the profile is necessary to properly place the measuring device. See also velocity traverse. velocity safety valve n: see subsurface safety valve.

n: The distribution of velocity of all material point on the same section when fluid flowing.

a valve specially dressed for a particular well and kept current with maximum flow potential that can shut in the well if surface control is lost. Also called a storm choke – an early subsurface safety valve.

a small diameter tubing string, often coiled tubing that is suspended inside the existing production tubing. By occupying part of the flow path space, the velocity of the produced fluid is increased and the potential to lift water from the well is increas

n: 1. an opening in a vessel, line, or pump to permit the escape of air or gas. 2. a device installed on one end of that portion of a pipe- line that crosses under a road. The vent marks the boundary of the highway right-of-way and provides an exit for any fluids should the pipeline develop a leak. It also aids in locating line breaks. v: to open a vessel or line so that air or gas can escape.

release gas pressure.

n: the drop in pressure resulting from the increased velocity of a fluid as it flows through a constricted section of a pipe.

n: a nozzle that, because of the venturi effect, increases the velocity of a fluid flowing through it.

n: a short tube with a calibrated constriction that is used in instruments or devices such as jet hoppers. It was developed to take advantage of the principle that a fluid flowing through a constriction has increased velocity and reduced pressure.