دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a glass-stem thermometer totally encased in a glass sheath, which provides air space between the thermometer and the liquid in which the unit is immersed.

n: a type of thermometer used on oil tanks. The graduated part of the thermometer is angled at least 90ﾰ from the temperature-sensitive portion. The angle conforms to the shell of the tank and permits easy reading of the instrument.

n: a glass-stem thermometer in which the tail is bent at an angle to the stem so that the tail can be mounted in a horizontally disposed thermowell, leaving the scale vertical for greater ease of reading.

n: a corrosion-resistant metal case in which a glass-stem thermometer can be placed to minimise the risk of breakage.

bacteria generated natural gas, found at shallow depths and in many water wells. Usually contains C14 isotope. See also thermogenic gas as a gas that has a biological origin but has been modified from the original organic state by time at temperature and

the amount of heat input required to raise the temperature of one pound of water by 1oF at water’s maximum density at 39oF. It is approximately equal to 1 kilojoule.

irregular motion of colloidal sized particles when suspended in a fluid. The effect in simplest terms is caused by thermal driven motions.

n: a measure of heat energy equivalent to the amount of heat needed to raise 1 pound of water 1ﾰF at or near its point of maximum density (39.1ﾰF). Equivalent to 0.252 kilogram- calorie or 1,055 joules.

British Thermal Unit.