دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see accuracy curve of a volume meter.

n: a volcanic rock that can be extended to many times its original volume by crushing and heating under pressure. Release of the pressure causes expansion when the water in the rock turns to steam. It is used as an extender in cement.

n: generally speaking, it refers to some different size of product that made of pearl rock. it uses as porous loss layer block agent.

n: fixed a packerbetween the tube bottom and the oil layer casing, the perpetual completion method that fixes a valve between the packer and landing nipple.

n: a nometrievable type of packer that is very reliable but must be drilled or milled out for removal. Most permanent packers are seal-bore packers.

n: after this kinds of packer lower in hole , it no longer take out. Drilling it or milling out when it no using. Most of which uses naked well.

a reliable packer designed and intended to be left in place for a long period of time that seals and holds pressure or resists movement from both directions.

n: a small valve or faucet for letting out air or for draining liquids.

abbr: an indicator of the acidity or alkalinity of a substance or solution, represented on a scale of 0-14, 0-6.9 being acidic, 7 being neither acidic nor basic (i.e., neutral),and 7.1-14 being basic. These values are based on hydrogen ion content and activity.

hydrostatic pressure.

n: a unit of measure of the acid or alkaline condition of a substance. A neutral solution (such as pure water) has a pH of 7;acid solutions are less than 7;basic, or alkaline, solutions are more than 7. The pH scale is a logarithmic scale. A substance with a pH of 4 is more than twice as acid as a substance with a pH of 5. Similarly, a substance with a pH of 9 is more than twice as alkaline as a substance with a pH of 8.

n: a parameter used to measure the acidity or alkalinity of a substance.

n: 1. a portion of a physical system that is liquid, gas, or solid, that is homogeneous throughout, that has definite boundaries, and that can be separated from other phases. The three phases of H2O, for example, are ice (solid),water (liquid),and steam (gas). 2. in physics, the stage or point in a cycle to which a rotation, oscillation, or variation has advanced.

a homogeneous body of material that differs in properties from other phases (immiscible) – e.g., gas, liquid, solid.

n: the number of electrical degrees between corresponding points on the sine wave of two or more emfs or currents of the same frequency, or between current and voltage in a circuit.