IOANNESYAN'S DRILLING PUMP Russian patent published in 2020 - IPC F04C2/344 F04C11/00 E21B21/08 

FIELD: pumps.

SUBSTANCE: invention relates to drilling pumps. Pump includes housing 1, in inlet cavity 4 of which axial steps 8 are installed, and sections 11 containing stator 12 with eccentrically arranged in it hollow rotor 10 are installed in it. Slot 13 interacting with stator surface 12 is movably installed in slots of rotor 10 to divide space between inner surface of stator 12 and outer surface of rotor 10 into suction and discharge chambers. Internal volume of rotor 10 is connected to volume of stator 12 by holes made in rotor 10. Housing 1 is supplemented with an outlet cavity separated from cavity 4 by sealed partition 3. Sections 11 are installed parallel to each other and are connected to walls of housing 1. Inlets of rotors 10 are connected with volume of cavity 4. Holes made in wall of rotor 10 and connecting its inner volume with volume of stator 12 are equipped with check valves. Outlets of stators 12 connect its inner volume with volume of outlet cavity and are located with angular pitch relative to each other. Each rotor 10 is equipped with a gear interacting with a gear installed on shaft 2 of the driving motor.

EFFECT: invention is aimed at increasing efficiency and reducing pulsations of pressure of pumped liquid.

1 cl, 3 dwg