دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a completion that uses flow to purposely increase the size of the open hole wellbore.

n: a powder consisting of alumina. silica, lime, and other substances that hardens when mixed with water. Extensively used in the oil industry to bond casing to the walls of the wellbore.

n: The efflorescent gelatinous material made by alumina, silicon earth, lime and mineral matter. Becomes hard after mixed with water. Usually used for cementing in oilfield.

n: 1. a portion of cement placed at some point in the well bore to seal it. 2.a wiper plug. See cementing, wi per plug.

n: (1) a portion of cement placed at some point in the wellbore to seal off the well;(2) a device used during a primary cement job to separate the cement slurry from contaminating fluids in the casing. A wiper plug is pumped ahead of the slurry and a shut-o

a plug of cement set by various methods that plugs the tubulars or the open hole.

n: a tool set temporarily in the casing or well to prevent the passage of cement, thereby forcing it to follow another designated path. It is used in squeeze cementing and other remedial cementing jobs.

n: A kind of tool for cement squeezing or remedying cementing job. Set into the casing or wellbore temporarily to stop cement slurry downflowing.

a temporary set plug to allow cement work above the tool. It is drilled out after the cement job.

n: The cyclic cement stone formed by cement slurry solidifying in the annular between casing and wellbore.

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 collapsible or folding metal cone that fits against the walls of the wellbore to prevent the passage of cement;sometimes called a metal-petal basket.

n: A kind of casing accessories, installed at the bottom of casing string, made by cage, scale sleeve and air-proof rubber suit. Its function is leading casing into the wellbore and preventing the formation below the shoe being contaminated by cement slurry.

n: A tool used to keep a tool string in the center of the tubing, casing, or wellbore. Tool centralization may be required for several reasons: to prevent the tool from hanging up on obstructions on the wellbore wall, to place fluid efficiently, and to avoid

a bladed or bow spring tool that helps center tools or pipe in the wellbore.

n: a barbed fishing tool used to snag and retrieve broken wireline from the wellbore.