دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

prep: over. The term usually relates conditions of fluid flow 00 me side of a piece of equipment to conditions on the opposite side (e.g., a pressure drop across a separator).

n: The pressure deficiency through the flowing direction due to friction resistance when drilling fluid flows in the annular.

n: a device that, when installed in a pipe or flow channel and actuated by automatic control equipment. enables a representative sample to be obtained of the fluid flowing therein. systematic basis, which can be tested to determine the quality of the liquid flowing in the line. An automatic sampling device consists of a probe inserted into the line, an extractor, a timer or other device that controls the sampling rate, and a small tank (sample receiver) that holds the samples.

n: 1. the pressure maintained on equipment or systems through which a fluid flows 2. in reference to engines, a term used to describe the resistance to the flowof exhaust gas through the exhaust pipe. 3. the operating pressure level measured downstream from a measuring device4.

n: 1. a valve used to regulate back-pressure on equipment or systems through which a fluid flows. 2. a valve used to regulate automatically a uniform pressure on the inlet side of the valve.

n: a device used to restrict fluid flow to one direction. It consists of a polished sphere, or ball, usually of metal, and an annular piece, the seat, ground and polished to form a seal with the surface of the ball. Gravitational force or the force of a spring holds the ball against the seat. flow in the direction of the force is pre- vented, while flow in the opposite direction overcomes the force and unseats the ball.

an isotope tracer in a bead with the same density of the flowing fluid that is used to track fluid flow rates and therefore fluid entry and exit points along the wellbore.

n: A kind of flow pattern of fluid obey Casson flow equation.

n: A one way valve installed at the bottom of drill pipe and above drill bit. Allowing drill fluid flowing from top to bottom in drill pipe.

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