دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

sand and proppant falling through a vertical pipe faster than the downflow of fluid during placement of propping. Bridging may occur.

n: The filter at the enter port of suction line of drill pump.

n: a translucent amber-colored to almost black brittle friable resin obtained by chemical means from oleoresin, the dead wood of pine trees, or from tall oil and used in making varnish, paper, and soap. It is also used as a soldering flux.

n: an instrument used to indicate flow rate. It consists of a float in a tapered tube, or a tapered float that moves in a fixed orifice. Row passing around an annular space between the float and its container causes the float to rise until its weight counterbalances the pressure drop across it. rotary n: the machine used to impart rota- tional power to the drill stem while permitting vertical movement of the pipe for rotary drilling. Modern rotary machines have a special component, the rotary or master bushing, to turn the kelly bushing, which permits vertical movement of the kelly while the stem is turning.

n: It permit csaing rotate,which is benefit to fill up the entire annular between casing and hole.

n: a chain drive powered by the draw works that drives the rotary table assembly;it runs from the drawworks sprocket to a drive-shaft sprocket. The driveshaft sprocket turns the drive-shaft assembly that drives the rotary table.

n: The pulpitb cast steel workpiece be setted on the rotary through main bearing.

n: a drilling method in which a hole is drilled by a rotating bit to which a downward force is applied. The bit is fastened to and rotated by the drill stem, which also provides a passageway through which the drilling fluid is circulated. Additional joints of drill pipe are added as drill- ing progresses.

n: the method of drilling wells that depends on the rotation of a column of drill pipe to the bottom of which is attached a bit. A fluid is circulated to remove the cuttings.

a rig that spins a drill string with a bit on bottom.