دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pl: the tongs latched on the drill pipe joint hanging in the totary by the slips, used to keep the pipe from turning as the makeup or breakout tongs (the lead tongs) apply torque to make up or break out the tightened tool joint connection. Compare lead tongs.

n: A tong suspended in the derrick, normally on the drillers right, used to hold box end of the tool joint while the pin end is loosened and unscrewed. Also called a make-up tong, as it is moved to pin end to tighten the joint to the recommended torque after

n: a workover performed with a continuous steel tube, normally 0.75 inch to I inch (1.9 to 2.54 centimetres) outside diameter, which is run into the well in one piece inside the normal tubing. Lengths of the tubing up to 16,000 feet (4,877 metres) are stored on the surface on a reel in a manner similar to that used for wireline. The unit is rigged up over the wellhead. The tubing is injected through a control head that seals off the tubing and makes a pressuretight connection.

n: an underwater pipe-joining technique in which the pipe is pulled to a target area in line with the platform but to one side of it. The connection is made by winding or otherwise deflecting the pipe laterally until it mates with the riser connection. Compare direct pull-in connection.

n: a straightforward connection that makes the speeds of a prime mover and a driven machine identical.

n: an underwater pipe-joining technique in which the pipe with its connector sled is steered straight onto the matching receiver at the base of the platform. Compare deflect-to-connect connection.

n: A type of tubing connection in which the internal or external surfaces are the same diameter throughout the tubing joint. Internal flush joints are most common, offering no restriction to fluid flow. Externally flush joints are typically used in more spec

a Non Upset connection in most cases.

n: a control head for injecting coiled tubing into a well that seals off the tubing and makes a pressure-tight connection.

n: one of the pricipal equipment conponents of a coiled tubing unit. The injector head incorporates special profiled chain assemibies to grip the coiled tubing string,and uses a hydraulic drive system that tractive effort for running and retrieving the strin

n: in tank sampling, a sample obtained by lowering an unstoppered beaker or bottle from the top of the oil to the level of the bottom of the outlet connection or swing line and returning it to the top of the oil at a uniform rate of speed so that the beaker or bottle is about threequarters full when with- drawn from the oil.

n: increasing the radius of root of tooth of numerical threading external thread and decreasing coning of external thread.

n: a baffle installed at or near the outlet connection of a liquid storage container to prevent the formation of a vortex and air/vapor entrainment in the liquid. Also called vortex eliminator.