دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the force in dynes that a stationary flat plate with a surface area of 1 square centimetre exerts on a similar parallel plate 1 centimetre away and moving in its own plane with a velocity of 1 centimetre per second, the space between the plates being filled with the liquid in question. It is a measure of the resistance that the liquid offers to shear. absolute error n: the difference between the result of a measurement and the true value of the measured quantity as determined by means of a suitable standard device.

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.

n: the first cross-country pipeline with a 24-inch (61-centimetre) diameter. The 1,340-mile (2,157 -kilometre) Big Inch was begun in 1942 with government financing as a part of an emergency construction program (War Emergency Pipelines) to meet the demand for petroleum products during World War II.

n: thin-walled pipe of high tensile strength with a diameter of 20 inches (51 centimetres) or more.

n: 1. steel pipe placed in an oil or gas well to prevent the wall of the hole from caving in, to prevent movement of fluids from one formation to another, and to improve the efficiency of extracting petroleum if the well is productive. A joint of casing may be 16 to 48 feet (4.8 to 14.6 metres) long and from 4.5 to 20 inches (11.4 to 50.8 centimetres) in diameter. Casing is made of many types of steel alloy, which vary in strength, corrosion resistance, and so on. 2. large pipe in which a carrier pipeline passes under railroad rights-of-way and some roads to shield the pipeline from the unusually high load stresses of a particular location. State and local regulations identify specific locations where casing is mandatory.

n: Steel pipe placed in an oil or gas well to prevent the wall of the hole in a drilled interval from caving in, as well as to prevent movement of fluids from one formation to another.


one of several strings of steel pipe in a well design that, together with cement, forms a barrier to fluid movement along the drilled hole. It is commonly at least partly cemented in the wellbore.

n: the entire length of all the joints of casing run in a well. Most casing joints are manufactured to specifications established by API, although non-API specification casing is available for special situations. Casing manufactured to API specifications is available in three length ranges. A joint of range 1 casing is 16 to 25 feet (4.8 to 7.6 metres) long;a joint of range 2 casing is 25 to 34 feet (7.6 to 10.3 metres) long;and a joint of range 3 casing is 34 to 48 feet (10.3 to 14.6 metres) long. The out- side diameter of a joint of API casing ranges from 4Yz to 20 inches (11.43 to 50.8 centimetres).

n: The entire length of all the casing joints run into the borehole. Several different sizes of casing string may be required.

a continuous string of casing, usually cemented over at least part of its length and usually extending back to surface from the set point.

n: (cm) a unit of length in the metric system equal to one-hundredth of a metre (1-2 metre).

n: (cgs) a variant of the metric system in which the measures are founded on the centimetre, gram, and second rather than directly on the kilogram and metre.

abbr: centimetre.

abbr: square centimetre.