دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A chemical that causes a dispersed colloidal system (such as clay) to coagulate and form flocs. Most flocculants are either multivalent cations such as calcium, magnesium and aluminum, or long-chain polymers. High pH, high salinity and high temperature ca

Materials used to increase visicosity. They cause colloidal particles to group into bunches or flocs.

n: the condition in which the feeding amount is over the feeding ability of the vibrosieve and centrifuge

n: most commonly worn by sport divers to overcome the buoyancy effect of water and keep them afloat in the proper position. Carbon dioxide cartridges inside the vest are fired when inflation is necessary.

n: a kind of float collar which can inject fluid into the casing from the bottom and can close automaticly to prenent the overflow entrying the casing when the overflow from the under layer leads to jetting rate greater than the predicated value

a four-way connection. In a wellhead, a flow cross connects the master valve and the swab valve with two, normally horizontal, connections to the wing valves.

n: a restriction installed in a line in which fluid is flowing that produces a pressure differential. The volume of fluid can be determined by measurement of the differential. Flow nozzles can handle dirty and abrasive gases better than orifices.

n: the speed, or velocity, of fluid flow through a pipe or vessel.

n: refer to“circulating rate”

n: a length of straight pipe containing straightening vanes or the equivalent and installed at the inlet of a flowmeter to eliminate swirl from the liquid from entering the meter and causing measurement errors.