دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

adv: 1. toward the stem of a ship or mobile offshore drilling rig. 2. behind. 3. farther aft than. See aft.

adv: toward or near the stem of a ship or offshore drilling rig.

n: a boring tool that consists of a shaft with spiral channels. An auger may be used to bore the hole for a pipeline that must cross beneath a roadbed.

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: see draft.

n: 1. a flat-decked, shallow-draft vessel, usually towed by a boat. Barges are not self-propelled. They are used to transport oil or products on rivers, lakes, and inland waterways. Also, a complete drilling rig may be assembled on a barge and the vessel used for drilling wells in lakes and in inland waters and marshes. Similarly, well service and workover equipment can be mounted on a barge. 2. an offshore drilling vessel built in the shape of a ship. Unlike a ship, however, it is not self-propelled. Also called a drill barge.

marine vessel without its own propulsion.

n: I. the fore and aft reference line at the upper surface of the flat plate keel at the centre line for flush shell plate vessels. 2. the thickness of the garboard strake above that level for vessels having lap seam shell plating.

n: the power produced by an engine as measured by the force applied to a friction brake or by an absorption dynamometer applied to the shaft or the flywheel.

n: The power produced by motor. Measured by absorption measurement device installed in axis or flywheel.