FIELD: soil or rock drilling.
SUBSTANCE: invention relates to the field of drilling equipment and can be used as part of pumping drilling rigs for injection of various process liquids into the well. Pump includes housing, drive shaft, crank-and-slider mechanism, cylinder-piston group and hydraulic boxes interconnected with suction and pressure manifolds. Cylinder bushings include guide bushings and sleeves pressed into them from wear-resistant metal and are fixed in housings (14) by means of yokes (31) with annular beads. Stocks (17) of pistons to stocks (29) of sliders are fixed by means of inserts fixed on end of stocks (29) of slides by means of yokes (34) with annular beads. Insert and stock (29) force contact is performed by means of insert made in the form of ball segment.
EFFECT: higher reliability and manufacturability of elements of piston group of drilling pump.
1 cl, 5 dwg
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