دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

back pressure valve.

Petrobras.

n: The acclive component part in the derrick geometry.

clamshell-type rings of anodes that clamp around a pipeline.

n: water that contains relatively low concentrations of soluble salts. Brackish water is saltier than fresh water but not as salty as salt water.

n: The water which contains lesser salt, including hard water whose pH is from 7 to 9. Usually the content of chloride is less than 18970g/L. It comes from coastal waters, bay, variole or inland lake. This kind of water contain more Ca2+ and Mg2+. We should

indefinite term meaning water with small amounts of salt. Saltier than fresh water.

n: a condition in which the weight on a bit tooth has been so great that the tooth has dulled until its softer inner portion caves over the harder case area.

n: The tipping becomes blunt due to the teeth of cone bit suffers oversized load.

n: (obsolete) casinghead. Glen T. Braden invented a casinghead in the 1920s that became so popular that all casingheads were called bradenheads.

a packer or packoff installed at surface on a well that enables the use of one size pipe inside another and allows flow into or out of each pipe separately.

n: a flanged connection at the top of the oil well casing.

n: The flange coupling device of the top of oil well casing.

n: a process used to repair a hole in the casing by pumping cement down tubing or drill pipe. First. the casinghead, or bradenhead, is closed to prevent fluid from moving up the casing. Then the rigs pumps are started. Pump pressure moves the cement out of the tubing or pipe and, since the top of the casing is closed, the cement goes into the hole in the casing. The tubing or pipe is pulled from the well and the cement allowed to harden. The hardened cement seals the hole in the casing. Although the term bradenhead squeezing" is still used, the term ,."bradenhead" is obsolete. See annular space. casinghead, squeeze.