MECHANISM TO ROTATE PIPES OR BEAMS Russian patent published in 2008 - IPC F04C29/00 F04C2/107 F04B47/00 

FIELD: engines and pumps.

SUBSTANCE: invention relates to machine building and can be used, for example, in a screw-type submerged pumps with a surface drive intended for extraction of petroleum. The said mechanism driving the submerged pump incorporates two hollow spindles, a load and driven ones, an element to suspend strings, an insert and a sealing gland. The load spindle incorporates a hollow shaft arranged in the driven spindle space. The element to suspend the strings is a composite rod with grooves and is attached by means of inserts in the hollow shaft upper part. The load spindle, hollow shaft and composite rod form a hydraulic space communicating, on one side, with the well pump forcing section and, on the other side, it is limited by a seal arranged between the hollows shaft and the composite rod. The sealing gland is furnished with a cup with internal partition dividing the sealing gland space into two chambers with independent clamping elements.

EFFECT: higher reliability and efficiency.

4 cl, 2 dwg