دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a ridged ring-like support next to a seal to provide higher pressure or temperature support.

n: The wrench used to seizure another pipe or screw when make up and breakout.

the tool that keeps the pipe string from rotating while a joint is made up.

n: See backup tongs.

n: the depositional environments associated with a shallow lagoon shoreward from a coastal barrier island. These environments are highly variable and may include tidal channels, salt marshes, shell reefs, and mangrove swamps, among others.

a backlash of tongs that results in a grip in the wrong direction.

n: the technique for covering a completed pipeline so that adequate fill materal is provided underneath the pipe as well as above it. Backfilling prevents pipe damage caused by loose rock, abrasion, shifting, and washouts.

n: in drilling operations, gas that returns to the surface with the drilling mud in measurable quantities but does not cause a kick. Increases in background gas may indicate that the well is about to kick or has kicked.

the radiation intensity existing in the environment before a specific radiation source is considered.