دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a large, sloping sedimentary deposit at the mouth of a canyon, laid down by intermittently flowing water, especially in arid climates, and composed of gravel and sand. The deposit tends to be coarse and unworked, with angular, poorly sorted grains in thin, overlapping sheets. A line of fans may eventually coalesce into an apron that grows broader and higher as the slopes above are eroded away.

land counterpart of a river delta. Characteristic of sediments that have been transported by a fast moving stream then dropped out of the flow as the stream velocity drops as it spreads out. Typical of zones of heavy water runoff such as found at the base

n: a floating marker used in a spread mooring system to position each anchor of a semi-submersible rig or drill ship. See spread mooring system.

n: a wire rope that has been flattened and the strands of which have been spread. v: to flatten and spread the strands of a wire rope.

n: a special well-control tool made up in the drill pipe usually just above bubble, of gas enter the annulus, the bubble chopper allows mud in the drill string to be diverted into the gas bubble by means of an opening, or port, in the tool. The mud from the drill string mixes with and spreads out the large gas bubble so that the gas cannot expand to a great extent as it nears the surface. Reducing the amount of bubble expansion reduces pressure on the casing near the surface and thus minimises the chances of formation fracture and an underground blowout.

n: an action of wire rope during loose drum spooling in which a layer of rope spreads apart so that the next layer travels in the groove produced. Crushing, flattening, or distorting of the rope results.

n: The bullet gun that shrinks in the oil tube and outspreads leaf spring out of the oil tube.

n: the difference between the actual air temperature and the dew-point temperature.

n: a tool used to broaden the wellbore ,on whose body there are upper-line and lower-line gear wheels and in each line there are three gear wheels in symmetric offset spread

n: the increased outward-spreading load cused by the ledge surface of the elevator being abraded

n: pipeline construction workers responsible for welding fabrication assemblies into the line. The fabrication crew works independently of the rest of the spread. face mask n: a mask made of a rubber frame surrounding a clear, flat lens, used to seal all or a portion of a divers face from the underwater environment.