دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any device that is used to remove deposits (such as scale or paraffin) from tubing, casing, rods, flow lines, or pipelines.

a device that cuts through paraffin, asphaltenes, etc. inside the pipe. Run on wireline.

n: a specially designed piece of equipment that is installed in a pipeline to launch or receive a pipeline scraper.

n: A kind of crushing ways of the cone bit to the bottom hole when drilling the soft formation.

n: a device that is fastened to the outside of casing to remove mud cake from the wall of a hole to condition the hole for cementing. By rotating or moving the casing string up and down as it is being run into the hole, the scratcher, formed of stiff wire, removes the cake so that the cement can bond solidly to the formation.

n: a device fasten to the outside of the casing, and which removes mud cake and thus promotes a good cement job.

a device with bristles or wires that is used to remove mud cake, soft deposits, etc.

mechanical methods of physically removing mud cake from the borehole wall.

n: determination of the relative percentages of substances, e.g., the suspended solids in a drilling fluid that pass through or are retained on a sequence of screens of decreasing mesh size. Also called sieve analysis.

n: The solid phase grains in the drilling fluid pass different sizes screen for knowing the distribution of sizes .


particle size distribution of a sand sample made by running the sample through a set of screens.

A blade type centralizer, usually mounted at the connection, which holds the screen off the casing wall to assist in gravel packing and flow.

n: The rubber cradle that setting under the cantilever of screen frame of mud desander,which used to develop the shaking efficiency.

n: see wire-wrapped screen.

n: Twisting the steel wire on the liner ,which can decrease the amount of sand into the liner.

a completion that uses a screen without a gravel pack, allowing the formation to cave in around the screen.