دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

advanced technology parts.

bottom hole treating pressure.

the device that takes in fluid feed, mixes in sand and then outputs to the pump truck.

n: a section of the lining of a brake band shaped to conform to the curvature of the band and attached to it with countersunk screws. See brake band.

n: The heatproof, abrasion proof, and high friction coefficient blocklike component part. Made by material pressure stencil or plait pressure stenci. Fixed in the inner surface with head screw. The friction produced by contact of brake drum when working.

n: The cement made by bauxite and limestone. This cement is heatproof, non-corrodible and firm in the early stage. Applied in geothermal well and thermal recovery well.

n: output link of a cam mechanism.

n: in systems supplying a breathable source of air to workers wearing breathing equipment in a toxic atmosphere. a serial connection of air cylinders in which the output of air from one adds to that of the next.

n: see chain drive. chain-and-sprocket drive n: a type of drive that consists of a loop of chain that goes around two shafts with sprockets fitted on the shafts. The driving shaft provides power and the driven shaft receives power. When the sprocket on the driving shaft turns, the chain moves and turns the driven sprocket. chainand- sprocket transmission n: a selective transmission made up primarily of chain-andsprocket drives. There are three two-strand chain-and-sprocket drives and a pair of gears for reversing, located between the input shaft coming from the compound, and the output shaft on a mechanically driven drawworks. Each of these chain-and- sprocket drives has a different sprocket ratio to provide three speeds to the high-drum drive and three to the low-drum drive. Com- pare gear transmission.

n: a reduction unit between a prime mover and a beam pumping unit that reduces the prime movers output speed by means of a series of chains.