دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a ratchet mechanism that is actuated by a fixed rod or chain connected to the walking beam of a pumping unit and that provides a slow rate of rotation to the rod string, distriooting the wear on both rods and tubing.

n: a scratch on the surface of a sucker rod or a piston rod.

n: a sucker rod string, that is, the entire length of sucker rods, which usu- ally consists of several single rods screwed together. The rod string serves as a mechanical link from the beam pumping unit on the surface to the sucker rod pump near the bottom of the well.

the string of sucker rods used in beam pumping a well.

n: a device closed around the rods when the well may flow through the tubing while the rods are being pulled. It is a form of blowout preventer.

n: a short length of sucker rod that is attached to the top of the sucker rod pump.

n: A cable drilling ways that use drill pipe join the bit .

n: a paraffin wax that forms on the sucker rod string.

n: the rapid, whiplike motion of the rods in a sucker rod pumping system, caused by vibration of the rod string.

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

n: a special wrench designed for spinning up and hammering tight the joints between sucker rods. Also called a key.