دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an object that is left in the wellbore during drilling or workover operations and that must be recovered before work can proceed. It can be anything froo1 a piece of scrap metal to a part of the drill stem. v: 1. to recover from a well any equipment left there during drilling operations, such as a lost bit or drill collar or part of the drill string. 2. to remove from an older well certain pieces of equipment (such as packers. liners, or screen liner) to allow reconditioning of the well.

n: Any object in a well that obstructs drilling or operation;usually pipe or junk.

a lost piece of equipment in the well.

n: any method by which large amounts of sand in a sandy formation are prevented from entering the wellbore. Sand in the wellbore can cause plugging and premature wear of well equipment. See gravel pack, sand consolidation, screen liner:

one of various mechanisms for controlling formation sand movement during fluid production from a weakly consolidated sandstone.

n: see wire-wrapped screen.

n: Twisting the steel wire on the liner ,which can decrease the amount of sand into the liner.

n: a relatively short length of pipe that has openings in its sides and a specially shaped wire wrapped around the pipe. It is used in wire-wrapped screen completions, usually in conjunction with a gravel pack. The screen and gravel pack block out sand and allow fluids to flow into the well through the openings in the screen. Also called a screen liner.