دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the speed, measured in revolutions per minute, at which the rotary table is operated.

n: The speed of rotary.

String RPM.

n: The exponent of speed in the drilling rate model,usually smaller than 1.

a deviation drilling method where the BHA is turned through a steerable component at the bottom of the well that directs the path of the bit.

n: the principal piece of equipment in the rotary table assembly;a turning device used to impart rotational power to the drill stem while permitting vertical movement of the pipe for rotary drilling. The master bushing fits inside the opening of the rotary table;it turns the kelly bushing, which permits vertical movement of the kelly while the stem is turning. See kelly bushing, master bushing.

n: the main component of the rotating machine that turns the drill string .it has a bevelled gear meachanism to create the rotation,and an opening into which bushings are fitted.

the assembly of gears and connections that spins the kelly.

n: a rotating machine housed primarily inside a rectangular steel box with an opening in the middle for the kelly and the drill pipe that creates and transfers the turning motion for rotary drilling;parts of the assembly include the base, rotary table, master bushing, driveshaft assembly, drawworks sprockets, driveshaft sprockets, and locking devices.

n: a cast steel or reinforced fabricated steel shell that encloses the pinion end of the drive shaft and the rotary table.

n: a small mechanical brake for the rotary table made of an iron rod and a notched wheel;its function is to stop the turning movement of the rotary table and hold it securely while the crew makes or breaks a connection or performs other jobs.

n pl: see tongs.

n: the rotational force applied to turn the drill stem.