دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a weight placed in the derrick or under the rig floor that is attached by means of wire rope to the tong hanger. Each set of tongs has a counterbalance to ensure that they hang at a convenient height above the rig floor.

n: The situation that the weight on bit is too large when drilling.

n: The situation that the weight on bit is too small when drilling.

n: a heavy coupling element for drill pipe made of special alloy steel. Tool joints have coarse, tapered threads and seating shoulders designed to sustain the weight of the drill stem, withstand the strain of frequent coupling and uncoupling, and provide a leakproof seal. The male section of the joint, or the pin, is attached to one end of a length of drill pipe, and the female section, or the box, is attached to the other end. The tool joint is usually friction welded to the end of the pipe.

n: The enlarged and threaded ends of joints of drillpipe. These components are fabricated separately from the pipe body and welded onto the pipe at a manufacturing facility. The tool joints provide high-strength, high-pressure threaded connections that are s

a pipe connection.

TDS, conductivity test of ions in the water. The combined dry weight of dissolved materials, both organic and inorganic, expressed in ppm that are contained in the water.

n: The pressure of unit area at a given depth,which caused by the total weight of rock and liquid between the mineral at the depth.

v: to lower pipe or tubing onto a downhole tool so that all or part of the pipes or tubings weight is transferred from the traveling blocks hook to the tool.

n: the small amount of additional mud weight carried over that needed to balance formation pressure to overcome the pressure-reduction effects caused by swabbing when a trip out of the hole is made.

any mud density over the amount needed to balance the formation with a static mud column. Related to overbalance.

n: The presure of bit applied by drill string substract the upward presure caused by drill fluid

n: The presure of bit applied by drill string substract the upward presure caused by drill fluid