دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a choke in which the position of a conical needle, sleeve, or plate may be changed with respect to their seat to vary the rate of flow;may be manual or automatic. See choke.

n: A choke in which a conical needle and seat vary the rate of flow.

a pressure step-reduction choke that can be changed while actively flowing the well.

n: an adjustable choke that is power-operated to control pressure of flow. See adjustable choke.

n: The adjustable choke controled by pneumatics or hydraulic pressure. Used for controlling the pressure and circulating rate.

n: a cylindrical tube placed around the retrieving neck of a retrievable bridge plug to catch debris or frac balls.

a cylinder at surface to catch ball sealers before the fluid is routed through the choke.

n: a nipple or restriction placed in a line (a pipe) to reduce the rate of flow of fluid through the line. Beans are frequently placed in Christmas trees to regulate the flow of fluids corning out of the well. Also called a flow bean. See Christmas tree.

a flow restriction common in downhole chokes, surface chokes and some SSSVs.

an engineered sequence of choke settings in the start-up of a well to apply stresses in the formation in a manner that will strengthen the formation and avoid failure.

the equation is used in the design of chokes and explains the manner in which pressure in the body in the body of the choke, downstream of the first pressure drop, is lower than the eventual recovery pressure at the end of the choke.

a restriction in a profile near the bottom of the well that allows some gas expansion and holds a backpressure on the formation. Rarely used, but considered for hydrate control.

n: a device with a restricted opening placed in the lower end of the tubing to control the rate of flow. See choke.

n: see bottomhole choke.