An electrochemically actuated pump and an electrochemical actuator for use with a pump. The pump includes one of various stroke volume multiplier configuration with the pressure of a pumping fluid assisting actuation of a driving fluid bellows. The electrochemical actuator has at least one electrode fluidically coupled to the driving fluid chamber of the first pump housing and at least one electrode fluidically coupled to the driving fluid chamber of the second pump housing. Accordingly, the electrochemical actuator selectively pressurized hydrogen gas within a driving fluid chamber.

Downhole well pump assembly (1) having first and second pump units (7a, 7b) with first and second bellows (31) connected to inlet and outlet check valves. A drive fluid assembly (5) with first and second hydraulic drive lines (9a, 9b) communicates with the bellows. Hydraulic fluid is provided to the first and second hydraulic drive lines. A drive fluid distribution valve (11) is arranged between a drive pump (17) and the drive lines. It has a drive fluid inlet and outlet (113, 115), and first and second drive ports. The distribution valve (11) interchanges between a first mode, where the drive fluid inlet communicates with the first drive port and the drive fluid outlet (115) communicates with the second drive port; and a second mode, wherein the drive fluid inlet communicates with the second drive port, and the drive fluid outlet communicates with the first drive port.

Method, and associated system, computer program and use, of controlling working range of a pump bellows, including maximum limitations such as maximum retracting position and maximum extension position of the bellows, the method comprising the steps of: a) reading at least a first position of a bellows (6′, 6″) in a closed hydraulic loop volume using at least one position sensor (12′, 12″), g) transmitting a first position signal representing the first position to a control system, h) wherein the control system, based on the at least first position signal: c1) determines the position of the bellows (6′, 6″) represented by the at least first position signal, c2) compares the position of the bellows (6′, 6″) with a predetermined bellows position operating range, and c3) if the position is outside the predetermined bellows position operating range, instructs an oil management system valve (16′, 16″) allowing a dual acting pressure boosting liquid partition device (2) to recalibrate the hydraulic fluid volume in the closed hydraulic loop volume to re-establish a hydraulic fluid volume that causes the at least first position to return to a position within the predetermined bellows position operating range.

A reciprocating pump includes: a housing with a fluid channel that includes a pump chamber; a reciprocated member that is disposed in the housing to form the pump chamber, and reciprocable for suction and discharge of fluid; an actuator configured to reciprocate the reciprocated member; and a pressure gauge with a pressure receiving portion, configured to detect pressure of the fluid in the fluid channel via the pressure receiving portion. The housing includes an inner wall facing the fluid channel, and a flexible, membranous portion placed continuously next to the inner wall to face the fluid channel. The pressure gauge is attached to the housing such that the membranous portion is sandwiched between the pressure receiving portion and the fluid channel.

The APPARATUSES, METHODS AND SYSTEMS FOR HARNESSING THE ENERGY OF FLUID FLOW TO GENERATE ELECTRICITY OR PUMP FLUID include a device which, when placed in fluid-flow, harnesses the kinetic energy of the flow to generate electricity or to perform useful mechanical work such as pumping. For example, the undulating mechanical action of traveling waves along flexible fins may be harnessed by summing the varying speeds and torques along the fins into a unified circulatory system for power take-off or fluid extraction. The device may include two fins, a chassis, and bellows/pistons/rotary vanes and the like which are connected via a circulatory system of tubes or conduits.

The invention relates to pump assemblies for pumping fluids with a high solids content. The present assembly comprises a housing having two parts with internal cylindrical chambers having openings for the inlet and outlet of a pumped fluid, and two longitudinally deformable bellows fastened inside the respective parts of the housing. The opposite end of each bellows is provided with a plug. On the end surface of the housing to which the bellows are connected is an opening for the inlet of a working fluid into the corresponding internal chamber. A hydraulic system for controlling the pump assembly is configured as a tank containing a working fluid, a positive displacement pump, two independent hydraulic pipelines, and a system of valves capable of alternately connecting the internal chambers of the bellows containing working fluid to the pipelines. The internal chamber of each bellows is alternatingly connected to the positive displacement pump for supplying working fluid by a first hydraulic pipeline and to the working fluid tank by a second hydraulic pipeline. The assembly allows to increase the capacity of the pump, reduce the weight and size of the pump assembly, and improve energy efficiency.

The invention relates to a dual acting pressure boosting liquid partition device (2), a system comprising the dual acting pressure boosting liquid partition device (2), a fleet comprising the system, and use of the device, system and fleet. The dual acting pressure boosting liquid partition device (2) for a closed hydraulic loop volume, the dual acting pressure boosting liquid partition device (2) being capable of feeding and retracting a large amount of hydraulic fluid under high pressures to and from at least a first pressure transfer device (1) and second pressure transfer device (1), the pressure transfer devices (1, 1) pumping fluids with particles at high volumes and pressures above 500 bars, where the dual acting pressure boosting liquid partition device (2) is controllable by a variable flow supply through at least a first drive fluid port (24) and a second drive fluid port (24), wherein the dual acting pressure boosting liquid partition device (2) comprises: a hollow cylinder housing (20) having a longitudinal extension, wherein the cylinder housing (20) comprises at least a first part and a second part having a first transverse cross sectional area (a1) and a third part having a second transverse cross sectional area (a2) of different size than the first transverse cross sectional area (a1), and a rod (19).

A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.

The invention relates to a positive displacement pump (10) comprising a pump body (11, 101, 201) comprising an inlet end (16, 116, 216) and an outlet end (18, 118, 218), a pumping chamber (30, 130, 230) arranged between said inlet end (16, 116, 216) and said outlet end (18, 118, 218), at least one membrane (20, 120, 220) active in the pumping chamber (30, 130, 230) and mobile between an expanded configuration in which the volume of the pumping chamber (30, 130, 230) is maximum and a retracted configuration in which the volume of the pumping chamber (30, 130, 230) is minimum, a delivery valve (46, 146, 246) arranged close to the outlet end (18, 118, 218) of the pump body (11, 101, 201), an intake valve (26, 126, 226) comprising an intake mouth (27, 127, 227), an outlet mouth (28, 128, 228) and a valve wall (29, 129, 229) that joins the intake mouth (27, 127, 227) to the outlet mouth (28, 128, 228), the intake mouth (27, 127, 227) being coupled to the inlet end (16, 116, 216) of the pump body (11, 101, 201) and the outlet mouth (28, 128, 228) being inserted in the pumping chamber (30, 130, 230). Said at least one membrane (20, 120, 220), when in the retracted configuration, adheres to the valve wall (29, 129, 229) of the intake valve (26, 126, 226) and the intake valve has the outlet mouth closed.

The invention relates to pressure transfer device, system comprising the pressure transfer device, a fleet comprising the system and use of a pressure transfer device for pumping fluid at pressures above 500 bars, the pressure transfer device (1, 1) comprising a pressure chamber housing (1, 1) and at least one connection port (3, 3), the at least one connection port (3, 3) being connectable to a dual acting pressure boosting liquid partition device (2) via fluid communication means (26, 27; 26, 27), the pressure chamber housing comprises: a pressure cavity (4, 4) inside the pressure chamber housing, and at least a first port (5, 5) for inlet and/or outlet of fluid to the pressure cavity (4, 4), a bellows (6, 6) defining an inner volume (7, 7) inside the pressure cavity (4, 4), and wherein the inner volume (7, 7) is in fluid communication with the connection port (3, 3), wherein the pressure cavity (4, 4) has a center axis (C, C) with an axial length (L) defined by the distance between the connection port (3, 3) and the first port (5, 5) and a varying cross sectional area over at least a part of the axial length (L), and wherein the bellows (6, 6) is configured to move in a direction substantially parallel with the center axis (C, C) over a part of the axial length (L) of the pressure cavity (4, 4).