A compressor device for compressing a gas in at least one compression chamber in at least one compression cylinder is disclosed. In each of at least two drive cylinders, at least one drive piston is disposed, said at least one drive piston dividing each of the at least two drive cylinders into two drive chambers. The at least one first and second drive chamber, by way of a hydraulic fluid, are able to be periodically impinged with a fluid pressure in order for the respective drive piston to be moved. Each of the remaining drive chambers in the at least two drive cylinders, by way of a connection piece, are connected in a non-positive locking manner by a fluid. The movement of the drive pistons by way of at least one mechanical connection means is able to be transmitted to at least one compression piston.

A compressor device for compressing a gas in at least one compression chamber in at least one compression cylinder is disclosed. In each of at least two drive cylinders, at least one drive piston is disposed, said at least one drive piston dividing each of the at least two drive cylinders into two drive chambers. The at least one first and second drive chamber, by way of a hydraulic fluid, are able to be periodically impinged with a fluid pressure in order for the respective drive piston to be moved. Each of the remaining drive chambers in the at least two drive cylinders, by way of a connection piece, are connected in a non-positive locking manner by a fluid. The movement of the drive pistons by way of at least one mechanical connection means is able to be transmitted to at least one compression piston.

The invention relates to a device and a method for compressing a working medium, comprising: compressing a drive medium in a compressor; moving a drive piston within a first cylinder by means of the compressed drive medium; moving a high-pressure piston, which compresses the working medium, within a second cylinder by means of the drive piston; and transferring heat from the compressed working medium to the compressed drive medium before the compressed drive medium enters the first cylinder of the drive piston.

A well service pump system supplies high pressure working fluid to a well. The pump system is a linear design which incorporates a diesel engine, a hydraulic drive gear box, open loop hydraulic Pumps, hydraulic ram cylinders, controls for the hydraulic system hydraulic cylinders, working fluid end cylinders and a coupling to connect the hydraulic cylinders and the working fluid ends. The engine powers the hydraulic system which, in turn, provides hydraulic fluid to operate the hydraulic ram cylinders. Each of the polished rods of the hydraulic ram cylinders is connected axially to a plunger rod end of a working fluid end cylinder. There is no crankshaft or automatic transmission required. The linear design allows for a longer plunger stroke length while still allowing highway transport on a truck or skid.

A well service pump system supplies high pressure working fluid to a well. The pump system is a linear design which incorporates a diesel engine, a hydraulic drive gear box, open loop hydraulic Pumps, hydraulic ram cylinders, controls for the hydraulic system hydraulic cylinders, working fluid end cylinders and a coupling to connect the hydraulic cylinders and the working fluid ends. The engine powers the hydraulic system which, in turn, provides hydraulic fluid to operate the hydraulic ram cylinders. Each of the polished rods of the hydraulic ram cylinders is connected axially to a plunger rod end of a working fluid end cylinder. There is no crankshaft or automatic transmission required. The linear design allows for a longer plunger stroke length while still allowing highway transport on a truck or skid.

A method for high fluid shear processing of a fluid uses an isolator that has a first sub-chamber for containing a first fluid and a second sub-chamber for containing a second fluid defined by a separator positioned in the chamber and movable between a first end of the chamber and a second end of the chamber. The two sub-chambers are in pressure communication with each other but are not in fluid communication with each other. A first fluid is pumped at an ultrahigh pressure into the first-sub chamber, and the pressure in the first sub-chamber causes a second fluid to be processed to be discharged from the second sub-chamber into a processing valve. A system is also provided for performing the steps of this method.

A reciprocating pump (10) comprises a first upright leg (12), a second upright leg (14), a first cross-over conduit (18), a second cross-over conduit (18), a lower valve assembly (20) and an upper drive assembly (22). The drive assembly includes plungers (30) which exert alternating downward pumping forces on columns of liquid in the legs (12, 14). The valve assembly is located in a reservoir of water (55) and includes suction openings (80, 64) in the water, which lead into the cross-over conduits (18) and (18), respectively. The valve assembly includes a system of valves and pistons (74, 76) for controlling flow of water into the legs (12, 14) via the cross-over conduits (12, 14) when pumping forces are alternately applied to columns of wafer in the legs (12, 14) wherein water in the legs is raised and lowered in alternating pendulum fashion. Water is drawn into and alternately forced along the cross-over conduits into the legs where the water is pumped from upper ends of the legs (12, 14) via slots (31) defined in the plungers.

A reciprocating pump (10) comprises a first upright leg (12), a second upright leg (14), a first cross-over conduit (18), a second cross-over conduit (18), a lower valve assembly (20) and an upper drive assembly (22). The drive assembly includes plungers (30) which exert alternating downward pumping forces on columns of liquid in the legs (12, 14). The valve assembly is located in a reservoir of water (55) and includes suction openings (80, 64) in the water, which lead into the cross-over conduits (18) and (18), respectively. The valve assembly includes a system of valves and pistons (74, 76) for controlling flow of water into the legs (12, 14) via the cross-over conduits (12, 14) when pumping forces are alternately applied to columns of wafer in the legs (12, 14) wherein water in the legs is raised and lowered in alternating pendulum fashion. Water is drawn into and alternately forced along the cross-over conduits into the legs where the water is pumped from upper ends of the legs (12, 14) via slots (31) defined in the plungers.

The invention relates to a metering pump having a hydraulic drive (12) for supplying a hydraulic fluid under pressure. The metering pump furthermore comprises a housing (2) and an oscillating piston (3), which is accommodated in the housing (2) in such a way that at least a first and a second hydraulic chamber (9-1, 9-2) and a first (6-1) and a second delivery chamber (6-2) are formed, wherein the oscillating piston (3) has at least a first driving surface (10-1) in the first hydraulic chamber (9-1) and at least a second driving surface (10-2) in the second hydraulic chamber (9-2), and the hydraulic chambers (9-1, 9-2) communicate with the hydraulic drive, thus enabling the oscillating piston (3) to be moved backward and forward between a first and a second position by the hydraulic fluid, wherein, during the movement from the first to the second position, the volume of the first delivery chamber (6-1) is enlarged and the volume of the second delivery chamber (6-2) is reduced and, during the movement from the second to the first position, the volume of the second delivery chamber (6-2) is enlarged and the volume of the first delivery chamber (6-1) is reduced. The invention furthermore relates to a metering system for mixing two fluids and a metering system for metering at least one fluid.

The invention relates to a metering pump having a hydraulic drive (12) for supplying a hydraulic fluid under pressure. The metering pump furthermore comprises a housing (2) and an oscillating piston (3), which is accommodated in the housing (2) in such a way that at least a first and a second hydraulic chamber (9-1, 9-2) and a first (6-1) and a second delivery chamber (6-2) are formed, wherein the oscillating piston (3) has at least a first driving surface (10-1) in the first hydraulic chamber (9-1) and at least a second driving surface (10-2) in the second hydraulic chamber (9-2), and the hydraulic chambers (9-1, 9-2) communicate with the hydraulic drive, thus enabling the oscillating piston (3) to be moved backward and forward between a first and a second position by the hydraulic fluid, wherein, during the movement from the first to the second position, the volume of the first delivery chamber (6-1) is enlarged and the volume of the second delivery chamber (6-2) is reduced and, during the movement from the second to the first position, the volume of the second delivery chamber (6-2) is enlarged and the volume of the first delivery chamber (6-1) is reduced. The invention furthermore relates to a metering system for mixing two fluids and a metering system for metering at least one fluid.