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According to the American Petroleum Institute (API), a standard barrel of oil is the amount of oil that would occupy a volume of exactly 1 barrel (158.99 L) at reference temperature and pressure conditions of 60 °F (15.6 °C) and 14.696 psi (1,013.25 hPa). This standard barrel of oil will occupy a different volume at different pressures and ...
The US fluid ounce is based on the US gallon, which in turn is based on the wine gallon of 231 cubic inches that was used in the United Kingdom prior to 1824. With the adoption of the international inch, the US fluid ounce became ⁄128 gal × 231 in 3 /gal × (2.54 cm/in) 3 = 29.5735295625 mL exactly, or about 4% larger than the imperial unit.
In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . [1] In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or 7.48 ppg). In conventional drilling ...
The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (42 US gallons, 35 imp gal or about 159 litres) of crude oil. The BOE is used by oil and gas companies in their financial statements as a way of combining oil and natural gas reserves and production into a single measure ...
Heavy crude oil has an API gravity below 22.3° (i.e., 920 to 1000 kg/m 3) Extra heavy oil has an API gravity below 10.0° (i.e., greater than 1000 kg/m 3) However, not all parties use the same grading. [9] The United States Geological Survey uses slightly different ranges. [10] Crude oil with API gravity less than 10° is referred to as extra ...
British imperial measures distinguish between weight and volume. Weight is measured in ounces and pounds (avoirdupois) as in the U.S. Volume is measured in Imperial gallons, quarts, pints, and fluid ounces. The Imperial gallon was originally defined as 10 pounds (4.5359 kg) of water in 1824, and refined as exactly 4.54609 litres in 1985.
A diesel cycle engine can be as much as 40% to 50% efficient at converting fuel into work, [2] where a typical automotive gasoline engine's efficiency is about 25% to 30%. [3] [4] In general, an engine is designed to run on a single fuel source and substituting one fuel for another may affect the thermal efficiency.
Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property ...