دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the exhaustion of a resource.2. a reduction in income reflecting the exhaustion of a resource. The concept of depletion recognizes that a natural resource such as oil is used up over several accounting periods and permits the value of this resource to be expensed periodically as the resource is exhausted.

reducing the fluid content of a formation by production of that fluid.

n: 1. decrease in value of an asset such as a plant or equipment due to normal wear or passing of time;real property (land) does not depreciate. 2. an annual reduction of income reflecting the loss in useful value of capitalized investments by reason of wear and tear. The concept of depreciation recognizes that the purchase of an asset other than land will benefit several accounting cycles (periods) and should be expensed periodically over its useful life.

v: to release the pressure contained in a tank, vessel, or pipe to a predetermined value. See bleed.

n: Two vertical girders sustaining drill floor and the equipments on it at the top of derrick base.

n: The vertical column that used to sustain the weight in the component part of derrick. Usually two or four.

n: See V-door.

n: See V-door.

n: a centrifugal device for removing sand from drilling fluid to prevent abrasion of the pumps. It may be operated mechanically or by a fast-moving stream of fluid inside a special cone-shaped vessel, in which case it is sometimes called a hydrocyclone. Compare desiller.

n: A centrifugal device for removing sand from the drilling mud.

n: the ratio of the ultimate load a vessel or structure will sustain to the permissibly safe load placed on it. Such safety factors are incorporated into the design of casing, for example, to allow for unusual burst, tension, or collapse stresses.

n: 1. the vertical distance from the ocean bottom to the nominal water level plus the height of astronomical and storm tides. 2. the deepest water in which an offshore drilling rig can operate.