دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the derrick or mast, draw works, and attendant surface equipment of a drilling or workover unit.

n: the derrick, draw-works, rotary table and all associated equipment required to drill a well.

typically a well drilling or service unit capable of pulling and running joined tubing.

n: the legal right of passage over public land and privately owned property;also the way or area over which the right exists. The width of a right-of-way varies according to contract specifications and individual easements, but it is generally between 50 and 100 feet (15 and 30 metres).

without a drilling or workover rig (may involve a wireline unit, snubbing unit, or coiled tubing unit).

a wiper placed over the drill pipe to wipe off excess mud as they are pulled from the well.

n: one of the links in a roller chain. It consists of two txlshings press-fitted into the link plates (side bars) and two rollers that fit over the bushings. The bushings are locked into the link plates to prevent rotation.

n: a type of chain that is used to transmit power by fitting over sprockets attached to shafts, causing rotation of one shaft by the rotation of another. Transmission roller chain consists of offset links, pin links, and roller links.

n: an anticline formed when the dip of a growth fault approaches the horizontal at depth and deposition is faster on the downthrown side, which tends to roll over" or curl downward.

n: see growth fault.

really overbalanced perforating, see EOP or extreme overbalanced perforating.

n: a worker on a drilling or workover rig, subordinate to the driller, whose primary work station is on the rig floor. On rotary drilling rigs, there are at least two and usually three or more rotary helpers on each crew. Sometimes called floorhand, floorrnan, rig crewman, or roughneck.