دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

the inside annulus;tubing-by-production casing annulus. (Note, there may be regional differences in the A, B, C annulus designations and some are reversed. Inside annuli (IA) and outside annuli (OA) are more universally descriptive.)

n: the amount of moisture present in the air. It may be expressed in milligrams of water per cubic metre of air. Compare relative humidity.

n: the value obtained when the absolute dynamic viscosity is divided by the density (expressed in grams per cubic centimetre) of the liquid at the temperature concerned.

actual cubic feet per minute.

the percent by weight loss of exposing a sample of material to an excess of acid.

n: a wireline instrument for measuring bottomhole temperature or pressure. It contains a clock-driven recording section and either a pressure element or a temperature element. It is thin enough to pass downhole through small tubing.

Injection of fluids down the annulus or “backside”. Common as a gas supply path for gas lift. Also used in some fracturing operations, to spot fluids downhole when no packer is used or a type of injection valve is in the tubing to allow entry of chemicals

n: fluid pressure in an annular space, as around tubing within casing.

pressure in an annular area. May be a vented or trapped annuli.

n: the space between two concentric circles. In the petroleum industry, it is usually the space surrounding a pipe in the wellbore, or the space between tubing and casing, or the space between tubing and the well bore;sometimes termed the annulus.

n: The space between a pipe and a hole. The space between drillstring and hole or casing is an Annulus.

n: the number of Btus contained in a cubic foot of natural gas adjusted to reflect the actual water content of the gas at delivered pressure, temperature, and gravity conditions.