دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a system consisting of a beacon positioned on the seafloor to transmit an acoustic signal, a set of three or four hydrophones mounted on the hull of a floating offshore drilling vessel to receive the signal, and a position display unit to track the relative positions of the rig and the drill site. Monitoring of the display unit aids in accurate positioning of the rig over the site.

n: a process for manufacturing components for 100-octane gasoline. An alkyl group is introduced into an organic compound either with or without a catalyst. Now usually used to mean alkylation of isobutane with propene, butenes, or hexenes in d1e presence of concentrated sulphuric acid or anhydrous hydrofluoric acid.

a reverse cracking process that convents hydrocarbon light ends (olefins) into longer chain, liquid fuels.

(failure/crack development): characteristic markings (ridges, tears, risers, etc.) on fracture surfaces after fatigue crack of fracture propagation (also known as beach marks, clamshell marks, and conchoidal marks).

n: The vertical heigh from the drill floor to the floor of monkey board.

v: the procedure whereby one threaded piece (such as a pipe) is unscrewed from another.

v: To disconnect a string of pipe by unscrewing one threaded piece from another.

unscrewing a tool or equipment. In pipe recovery, back-off of a joint precedes recovery of the upper section in a well. Common in plug and abandonment or sidetrack operations.

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

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 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.