دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: An accessary of landing tool.

valve normally placed across the circulation point to allow isolation of the tubing strings or tubing/casing during production.

n: The volume flow rate of the circulating drilling fluid, usually expressed in gallons per minute or barrels per minute.

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: an accessory employed above a packer, to permit annulus-to-tubing circulation or vice versa.

a downhole valve in the treating string, operated by pressure pulsing or wireline that will allow the annulus to be circulated.

n: a white high-level cloud that is composed primarily of ice crystals. This type of cloud forms from cirrus or cirrostratus clouds and has a rippled appearance. status n: a very thin, white, high-level cloud that produces halos visible around the sun or moon. This type of cloud is composed of ice

chemical injection valve.

completion isolation valve.

adj: (slang) commonly used to describe moderate to severe flocculation of mud due to various contaminants. Also called gelled-up.

n: I. a term used for particles smaller than \1156 millimetre (4 microns) in size, regardless of mineral composition. 2. a group of hydrous aluminum silicate minerals (clay minerals). 3. a sediment of fine clastics.

n: (1) A soft, variously colored earth, commonly hydrous silicates of alumina, formed by the decomposition of feldspar and other aluminum silicates. Clay minerals are essentially insoluble in water but disperse under hydration, grinding, or velocity effects.

a fine grain (<0.00015” or about 4 microns) – finely crystalline silica sheet minerals. Usually of silicate composition. In oil field terms, the most common clays are Smectite (montmorillinite),illite, kaolinite and chlorite. The characteristic for autho