دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a high volume flow choke.

the housing with valves and bails that controls the position and dropping of the plugs used in cementing.

n: a fluid moving as a unit in which all shear stress occurs at the pipe wall and hole wall. The stream thus assumes the shape of several telescopic layers of fluid with lowest velocities near the pipe and hole walls and the fastest in the middle.

n: the movement of a meterial as a unit without shearing within the mass. Plug flow is the first type of flow exhibited by a plastic fluid after overcoming the initial force required to produce flow.

fluid moves as a unit.

n: see valve.

a high pressure valve with a rotatable plug that allows or denies flow.

a tool that is dropped without attachment through the tubing and standing water in the well, then seals against the tubing using the pressure of the incoming gas to raise the plunger and the water above it to the surface. A very common Deliquification too

n: a method of artificial lift that utilizes a plunger that travels up and down inside the tubing. Internally, the plunger contains a bypass valve that is opened when it hits the top of the tubing and closed when it hits the bottom. The plungers fit with the tubing reduces liquid slippage back through the well fluid and the gas that is propelling it. Plunger lift is used in less than 1 percent of all artificially produced wells. It is particularly applicable, however, in high gas-liquid ratio oilwells or in gas wells with low bonom- hole pressure and low productivity.

n: a control valve that is actuated by air. SeverallX1ewnatic controls are used on drilling rigs to actuate and control rig components (such as clutches, hoists, engines, and pumps).

n: positive-displacement meter. It measures the single-phase volume of gas or fluid by filling and emptying chambers of a specific volume.