دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A telescoping joint at the surface in floating offshore operations that permits vessel heave (vertical motion) while maintaining a riser pipe to the seafloor. As the vessel heaves, the slip joint telescopes in or out by the same amount so that the riser b

n: drilling in which the size of the hole is smaller than the conventional hole diameter for a given depth. This decrease in hole size enables the operator to run smaller casing, thereby lessening the cost of completion. See miniaturized completion.

n: by current industry definition, is one where the well is TDd in 4 1/2 or smaller hole size. Slim hole drilling brings significant cost and enviromental benefits but makes well control more diffcult due to the high ECDs and small annular capacities.

n: The technology of logging by drill pipe and oil pipe pumping the equipment.

a type of bacteria that forms a slick surface.

n: A kind of special tool be used to coring in the slim-hole.

n: I. in pipeline operations, a wide rubber and fabric apron-like device on the end of the boom cats hoisting lines that is used for lowering in or handling coated and wrapped pipe. 2. in crane operations, a braided wire-rope device used to attach a load to the cranes hook. Often, several slings are used.

n: a hygrometer, or psychrometer, attached to a handle and chain cord, which is whirled rapidly through the air. It also has two thermometers. The bulb of one is kept wet so that the cooling that results from evaporation as the thermometers are whirled makes it register a lower temperature than the dry one. The difference between the dry and wet readings is a measure of the relative humidity of the atmosphere. See psychrometer.

n: in a chain-andsprocket drive, a type of oil bath lubrication in which the chain itself does not pass through the sump, but one or two disks rotating with the sprocket pick up oil from the sump and sling it against a plate, which then feeds it to the top of the lower span. Compare drip lubrication, pressure lubrication.

n: in an electric motor, the difference between the optimal and the actual output of the motor. v: to change the position of the drilling line periodically so that it wears evenly as it is used.