دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any of several substances - usually organic compounds of high molecular weight-that, when added in low concentrations to a bentonite or to certain other clay slurries, will increase the viscosity of the system. See low-solids mud.

n: The material increasing viscosity by adding into the clay slurry.

a drilling additive to increase the viscosity of water based muds gelled with bentonite.

n: a kind of tool which can make gas frame with molecular weight surround the electron beam so as to reduce the scattering of the electron beam and improve the ability of beaking rock

ratio of the gas density to the density of air. Equal to the ratio of molecular weight of gas to that of air (28.97).

n: see molecular weight.

n: the CMC product with high degree of polymerization ,high molecular weight and viscosity ,mainly used as adhesion promoter

n pi: organic compounds of hydrogen and carbon whose densities, boiling points, and freezing points increase as their molecular weights increase. Although composed of only two elements, hydrocarbons exist in a variety of compounds, because of the strong affinity of die carbon atom for other atoms and for itself. The smallest molecules of hydrocarbons are gaseous;the largest are solids. Petroleum is a mixture of many different hydrocarbons.

n: 1. a gas whose molecules are infinitely small and exert no force on each other. 2. a gas that obeys Boyles law and Joules law. Also called a perfect gas.

a theoretical gas that perfectly obeys PV=RT/m, where V is the specific volume, T is the absolute temperature, R is the universal gas constant, and m is the molecular weight.

n pi: the low molecular weight hydrocarbons such as methane, ethane, propane, and butanes.

n pi: petroleum fractions, such as ethylene, that are relatively light in molecular weight.

n: the fundamental unit of mass of any substance. A mole of any substance is the number of grams or pounds indicated by its molecular weight. For example, water, H2O, has a molecular weight of approximately 18. Therefore, a gram-mole of water is 18 grams of water;a pound-mole of water is 18 pounds of water. See molecular weight.