دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a special type of elevator designed to accommodate the end of a sucker rod. It allows the derrickman to transfer the rod to the racking platform from the regular elevator being used to lift the rod out of the well.

n: all the devices used to accomplish the moving of sucker rods from the elevators to the racking platform.

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: the angular motion of a ship or floating offshore drilling rig as its sides move up and down. v: to move from side to side.

n pi: the compartments on a floating offshore drilling rig that are filled with water to offset the rig.s tendency to roll.

a type of connector (with grooves around its diameter on one end and threads on the other) is slipped inside the coiled tubing and the wall of the coiled tubing is deformed by a roller-type device into the grooves, securely connecting the BHA to the coile

n: 1. on a kelly bushing, a cylindrical device that fits inside the bushing, whose exterior shape is matched to the kellys shape so that they mate with the kelly when it is inside the kelly bushing. See kelly bushing, roller assembly. 2. part of a roller bearing. See roller bearing.

n: on a kelly bushing, an arrangement of rollers, roller pins, and roller bearings that mate with the kelly as it moves up or down inside the kelly bushing. The roller assembly transfers the turning motion of the kelly bushing to the kelly, and, at the same time, allows the kelly to move up and down freely. See rolle!;roller bearing, roller pin.

n: a bearing in which a finely machined shaft (the journal) rotates in contact with a number of cylinders (rollers). Compare ball bearing.

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.