PUMP OF DIAPHRAGM TYPE FOR SUPPLY OF LIQUIDS AND METHOD OF ITS MANUFACTURING Russian patent published in 2009 - IPC F04B43/67 

FIELD: oil and gas production.

SUBSTANCE: pump is intended for application in drilling and well injection for supply of drilling mud in well. Pump comprises cylinder (2), piston (5) installed in cylinder (2) with the possibility of displacement from drive, and tubular diaphragm (4), which insulates working cavity (10) of pump that communicates with inlet and outlet openings of pump, from water-driven cavity (8), which communicates with internal volume of cylinder, which is adjacent to working surface of piston (5). To produce compact and simple design that makes it possible to produce the pump of diaphragm type on the basis of ordinary piston pump, pump is equipped with jacket (1) placed on top of cylinder (2) with creation of annular chamber limited by at least internal surface of jacket (1) and external surface of cylinder (2), besides, working (10) and water-driven (8) cavities, and also tubular diaphragm (4) that separates them are located in annular chamber. Method is also suggested to make such pump for liquids supply on the basis of piston pump, by means of modification of the latter.

EFFECT: no necessity to use complicated casting molds, lower manufacturing costs.

20 cl, 3 dwg