دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: CH2=CHCN, a kind of organic compound, colourless and fluxionary liquid. The vapor is toxic. It is the important material for coagulant of drilling fluid.

n: the common name for anhydrous calcium sulphate. caSﾰ4.

n: The main component is calcium sulphate which has no crystal water. The formation which contains this gypse is very usual in drilling and it can contaminate the fresh water drilling fluid. This formation swells when the drilling fluid go through it and som

CaSO4 formation. Usually formed as an evaporite from a drying lake of trapped sea water.

n: the temperature at which the vapour pressure of a liquid becomes equal to the pressure exerted on the liquid by the surrounding atmosphere. The boiling point of water is 212ﾰF or 100ﾰC at atmospheric pressure (14.7 pounds per square inch gauge or 101.325 kilopascals).

the temperature at which the vapor pressure of the liquid is equal to the pressure exerted on it by the surrounding atmosphere.

n: a paraffin hydrocarbon, C4H10 , that is a gas in atmospheric conditions but is easily liquefied under pressure. It is a constituent of liquefied petroleum gas. See commercail butane, field-grade butane, normal butane.

a four carbon chain alkane, may be a liquid in the reservoir, but vaporizes as pressure is released. Part of the natural gas liquid components.

n: the formation and collapse of vapour gas-filled cavities that result from a sudden decrease and increase of pressure. Cavitation can cause mechanical damage to adjacent surfaces in meters, valves, pumps, and pipes at locations where flowing liquid encounters a restriction or change in direction.

the creating of a high speed, very low pressure vapor bubble that quickly and violently collapses. Very detrimental to surfaces in the near proximity. Often seen in severe turbulent flow.

n: The pressure of fluid decreases below saturated vapor pressure and forms jet with numbers of air bubble when the fluid passes through special nozzle. The air bubble forms domestic high pressure when striking the solid border.

n: a decrease in the volume of a stratum due to pressure exerted by overlying strata, evaporation of water, or other causes.

n: The process of breaking cuttings and compacting it into sample with compaction cell when doing preventing caving test.

a crushing of the matrix structure as overburden loads press down on the rock, reducing the pore space. During production of the well, the load on the matrix increases as the pore-filling fluids are removed. These loads may reduce the porosity of the rock

n: the refrigeration cycle in which refrigeration is supplied by the evaporation of a liquid refrigerant such as propane or ammonia. Compare absorption-refrigeration cycle.

n: a light hydrocarbon liquid obtained by condensation of hydrocarbon vapours. It consists of varying proportions of butane, propane, pentane, and heavier fractions, with little or no methane or ethane.

the part of the hydrocarbon stream that is a vapor in the formation and condenses to a liquid after being cooled. Normally the volatile condensate has a composition of C5 to C8 and an API gravity of >40.

a relative permeability effect where condensate, usually hydrocarbon, drops out of the vapor phase around the wellbore when the pressure drops below the dew point in response to drawdown or depletion. Gas rates can be severely reduced by the permeability