FIELD: oil industry.
SUBSTANCE: invention relates to a pressure transfer device, a system containing a pressure transfer device, a complex containing a system, and the use of a pressure transfer device and complex for pumping fluid with pressure of more than 500 bar. Pressure transfer device (1', 1'') contains pressure chamber case (1', 1'') and at least one connecting channel (3', 3''). In this case, at least one connecting channel (3', 3'') is made with the possibility of connection via fluid to liquid distribution device (2) using connecting means (26', 27'; 26'', 27'') with increase in double action pressure. The pressure chamber case contains pressure cavity (4', 4'') inside the pressure chamber case and at least first channel (5', 5'') for inlet and/or outlet of fluid to pressure cavity (4', 4''), bellows (6', 6'') defining inner volume (7', 7'') inside pressure cavity (4', 4''). In this case, inner volume (7', 7'') communicates via fluid with connecting channel (3', 3''). Pressure cavity (4', 4'') has central axis (C', C'') with axial length (L) determined by a distance between connecting channel (3', 3'') and first channel (5', 5''), and variable cross-sectional area on at least part of axial length (L). Bellows (6', 6'') is made with the possibility of movement in a direction essentially parallel to central axis (C', C'') on part of axial length (L) of pressure cavity (4', 4'').
EFFECT: obtaining a complex for pumping fluids.
16 cl, 2 dwg
