دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see head.

n: a type of meter that measures the rate of fluid flow through it to determine the quantity of fluid flowing through it.

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: see fluid potential.

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 long tube used in well fire fighting operations to move all the fluids and the fire up above the damaged wellhead. May also be used to put out the fire in some cases.