دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The pressure within a system caused by fluid friction or an induced resistance to flow through the system. Hydraulic Thru-Tubing Fishing tools are typically operated using back pressure created by fiow through a nozzle.

a pressure caused by a restriction or fluid head that exerts an opposing pressure to flow.

a flow control valve that provides some control when running or pulling a string.

back pressure valve.

n: see float collar.

n: The collar with back pressure control valve, installed at the bottom of casing string. Prevents drill fluid entering into casing and decreases the weight of casing by buoyance. Also prevent cement recirculating when cementing.

n: see float shoe.

n: The Steel and round nipple with back pressure control valve, installed at the bottom of casing string. Leading casing entering into the wellbore and preventing drill fluid entering into the casing to decrease the weight of casing.

n: a device with an orifice installed in a line to restrict the flow of fluids. Surface chokes are part of the Christmas tree on a well and contain a choke nipple, or bean. with a small-diameter bore that serves to restrict the flow. Chokes are also used to control the rate of flow of the drilling mud out of the hole when the well is closed in with the blow-out preventer and a kick is being circulated out of the hole. See adjustable choke. bottomhole choke. positive choke.

n: A device incorporating an orifice that is used to control fluid flow rate or downstream system pressure. Chokes are available in several configurations for both fixed and adjustable modes of operation. Adjustable chokes enable the fluid flow and pressure

a device used to create a controlled pressure drop and allow some expansion of the gas. A choke holds a back pressure on the well fluids, controlling the expansion rate of the gas. It is useful for optimizing natural gas lift in oil wells with sufficient

n: a annex with two inverted valves and connected with the bottom of the tail pipe

n: the jet dribe shoe with a back pressure valve

n: the theoretical maximum capacity of a gas well as determined by a test conducted under limiting conditions. The method of determining this potential varies from state to state.

the maximum potential rate from the well if all back pressure was removed.