دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

A cement plug, set with no downhole flow conditions, which allows temporary or permanent shut-off in a well. It takes into account the densities of all fluid columns, both in the string and in the annulus.

n: The method assuming that borehole axis of two adjoining measured points is a polygonal line. The length of one part of polygonal line is equal to another part. The deviation angle and azimuth of upper part is same with upper measured point and the deviati

contractual agreement between legal parties to account for differences between chart measured quantities and the total confirmed quantities at a measuring point such as a plant. They are used to track over/under production relative to entitlements between

a steel, aluminum, brass or plastic ball pumped or dropped downhole to shift or operate a tool.

n: a bearing in which a finely machined shaft (a journal) turns on freely rotating hardened-steel spheres that roll easily within a groove or track (a race) and thus convert sliding friction into rolling friction. See ball race.

n: Composed by a set of hardened ball, inside race and outside race. Because the ball can roll flexibly in the race, the bearing journal can revolve freely in the bearing.

n: A kind of double core barrel drill. The top of inner barrel is hung by ball bearing. It is good for improvement of core recovery if inner barrel does not roll with outer barrel.

n: See ball bearing of cone.

n: Composed by several balls installed in the cone bearing and tray bath in the surface of cone axis. Used for sustaining radial reacting force of cone and part of axial force. Also can lock the cone and make sure it not fall off from the cone.

n: a cylindrical tube placed around the retrieving neck of a retrievable bridge plug to catch debris or frac balls.

a cylinder at surface to catch ball sealers before the fluid is routed through the choke.

n: a device for regulating the level of fluid in a tank. It consists of a valve connected to a hollow floating ball that, by rising or falling, shuts or opens the valve.