دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a boat or self-propelled barge used to carry supplies, tools, and equipment to job site offshore.

n: hardness developed in metals as a result of cold-working.

a metal deterioration in which the metal becomes progressively harder and more brittle with repeated application of load.

v: to perform one or more of a variety of remedial operations on a producing oilwell to try to increase production. Examples of workover operations are deepening, plugging back, pulling and resetting liners, and squeeze cementing.

n: 1. in drilling, the string of drill pipe or tubing suspended in a well to which is attached a special tool or device that is used to carry out a certain task, such as squeeze cementing or fishing. 2. in pipe- line construction, the string of washpipe that replaces the pilot string in a directionally drilled river crossing. The work string remains in place under the river until the actual pipeline is made up and is ready to be pulled back across the river.

The drill pipe or tubing string with special tool ,which can fishing, snubbing cementing,etc.






a special, often large string of tubulars that are used during the completion of the well. Usually higher pressure capacity or allow higher weights than the production tubing.

n: a larger type of self-contained breathing gear that provides from 30 to 60 minutes of air. This apparatus differs from the emergency escape unit mainly in the size of the air bottle and, hence, in its capacity to store air. Compare emergency escape unit.

n: the outer shell of a downhole plunger pump. The pumping cycle starts with an upward stroke of the rods, which pulls the plunger up through the working barrel. On the upstroke, the traveling valve closes, the standing valve in the working barrel opens, fluid above the traveling valve is lifted out of the well, and a new charge is drawn into the pump. On the downstroke, the traveling valve opens, the standing valve closes, and the fluid is forced from the working barrel through the traveling valve in the plunger and into the tubing. Repeated strokes bring the fluid to the surface.

It can express the life of bearing of drilling that have given type bit and media.