دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a track, channel, or groove in which ball bearings turn.

n: Installed in the assemblage opening of cone journal. Used to prevent ball dropping out of the track.

n pi: balls made of nylon, hard rubber, or both and used to shut off perforations through which excessive fluid is being lost.

n: Made by nylon or ebonite. Used to block off the opening in the capital string and prevent fluid lossing when fracturing.

small, rubber-covered, hard centered balls that can seal individual perforations during a chemical treatment.

v: 1. to collect a mass of sticky consolidated material, usually drill cuttings, on drill pipe, drill collars, bits, and so forth. A bit with such material attached to it is called a balled-up bit. Balling up is frequently the result of inadequate pump pressure or insufficient drilling fluid. 2. in reference to an anchor, to fail to hold on a soft bottom, pulling out, instead, with a large ball of mud attached.

n: The phenomenon that drill bit or drill tool is surrounded by cutting and viscous mud in drilling progress.

n: a flow-control device employing a ball with a rotating mechanism to open or close the tubing.

any of several valves that rotate a ball with a flow passage to allow or deny flow.

n: Installed in the bearing race of cone. There are a ball bearing and two roller bearing in every cone, both absorbing radial load.

v: to use a ball mill to grind, polish, or pulverise metal or stone particles.

v: to plug open perforations by using ball sealers.

When using ball sealers, to effectively shut-off the entire zone and cause pressure to rise sharply.