دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The tool of fishing drill tool. Consisted by outer barrel, rubber packing element and slip system. Fishing the junk by hitching the exine of the junk.

n: See cross-over circulation.

n: the movement of drilling fluid out of the mud pits, down the drill stem, up the annulus, and back to the mud pits. See normal circulation, reverse circulation.

n: The movement of drilling fluid through the flow system on a drilling or workover rig. This circulation starts at the suction pit and goes through the mud pump, drill pipe, bit, annular space in the hole, flowline, fluid pits, and back again to the suction

n: a variation of squeeze cementing for wells with two producing zones in which (1) the upper fluid sand is perforated;(2) tubing is run with a packer, and the packer is set between the two perforated intervals;(3) water is circulated between the two zones to remove as much mud as possible from the channel;(4) cement is pumped through the channel and circulated;(5) the packer is released and picked up above the upper perforation, a low squeeze pressure is applied, and the excess cement is circulated out. The process is applicable where there is communication behind the pipe between the two producing zones because of channelling of the primary cement or where there is essentially no cement in the annulus.

a secondary or repair cement method using upper and lower perforations and a packer set between. Circulation is established with water and mud remover chemicals to clean the channel. Cement is circulated with a set volume pumped, then the packer is releas

n pi: notations that appear in government documents for cross-referencing information.1f you are reading a regulation that refers to another regulation or to a different section in the same regulation, the citation will be listed so that you may refer to the appropriate material for more information.

n: a mechanical device used to hold an object in place. For example, a leak-repair clamp, or saddle clamp, holds a piece of metal with the same curvature as the pipe over a hole in a line, effecting a temporary seal. A wireline clamp holds the end of a wire rope against the main rope, while a polishedrod clamp attaches the top of the polished rod to the bridle of a pumping unit

n pi: a classification of injection wells under SDWA that are related to oil and gas activity. Typically, these wells are used to dispose of produced waters into depleted oil formations below drinking water sources;to inject produced water from production operations back into the producing zone;to inject fluids for enhanced recovery;and to store hydrocarbons.

movement of clay particles, usually after partial disintegration of the clay matrix due to absorption of water or reaction to other effects such as ions, velocity, crushing due to overburden, etc.

n: (CAA) one of the first environmental laws passed by the federal government. The CAA addresses and regulates airborne pollution that may be potentially hazardous to public health or natural resources.

n: Consisted by car-borne reciprocal pump. Used for workover. For example, sand washing and flushing.