دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a secondary fault, often in a set, with opposite direction to the primary fault.

a secondary fault, often in a set, with an opposite direction to the primary fault.

n: a transformer with only one winding, part of which is used for either the primary or secondary conductor, and part of which is used as both primary and secondary conductors.

n: A classified float collar installed in the same casing when three-level cementing. Used for secondary cementing. See regular stage collar.

a secondary, discontinuous fracture.

a secondary flow path that goes around a repair point or other feature.

n: the application of a liquid slurry of cement and water to various points inside or outside the casing. See primary cementing, secondary cementing. squeeze cementing. cementing barge n: a barge containing the cementing pumps and other equipment needed for oilwell cementing in water operations.

v: To prepare and pump cement into place in a wellbore. Cementing operations may be undertaken to seal the annulus after a casing string has been run, to seal a lost circulation zone, to set a plug in an existing well from which to push off with directional

n: a retrievable cement squeeze tool that is used in remedial cementing. See remedial cementing;secondary cementing.

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

secondary recovery technique for oil. The carbon dioxide gas is injected and alternated with water. CO2 lowers the viscosity of most oils, but may trigger severe asphaltene and scale precipitates.