The labyrinth piston compressor comprises a cylinder, a piston disposed in the cylinder, and a piston rod, wherein the piston rod extends in a longitudinal direction (L) and is connected to the piston, and wherein the piston is reciprocally movable in the longitudinal direction (L) within the cylinder, wherein the cylinder comprises a first cylinder cover, wherein an inlet valve and an outlet valve are arranged in the first cylinder cover, and wherein the inlet valve and the outlet valve are arranged symmetrically with respect to a plane of symmetry (S) extending in the longitudinal direction (L) along the piston rod.

A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

A rotary air pipe connecting an air outlet of an inflator includes a pipe body, a sleeve with an inner wall and an outer wall, and a first sealing ring. The pipe body has main body and a bottom portion, a top of the main body is provided with a joint, a bottom portion has a front portion and a back portion. The bottom portion passes through the sleeve, the front portion fits the inner wall of the sleeve, the back portion extends out of the sleeve. The bottom portion can rotate around an axial direction of the pipe body in the sleeve; the bottom surface of the sleeve is provided with a thread connecting with the front wall. The back portion is movably inserted into the air outlet, the first sealing ring is sleeved with the back portion, the first sealing ring fits the back wall.

A multi-stage compressor for compressing a fluid, the compressor comprising two or more cylinders each having a compression chamber and a piston, so that a fluid in each of the compression chambers can be com-pressed by the associated piston; the cylinders being connected in series such that a fluid entering an inlet of the compressor can be compressed to a first pressure in the compression chamber of a first cylinder and, then, enter into the compression chamber of a second cylinder where the compressed fluid is compressed to a second higher pressure and, before the fluid exits from an outlet of the com-pressor; wherein each piston is driven by one and the same crankpin of the compressor. Furthermore, a method for compressing a fluid, and a system for comprising the multi-stage stage compressor are disclosed.

A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

A natural gas pumping system that includes six reciprocating compressor cylinders, the reciprocating pistons of the six compressors having cycles offset by 60 degrees one from another.

A vacuum pump is provided that includes a body, a first cylinder at least partially inside the body, a second cylinder at least partially inside the body, and an electric drive motor attached to the body and driving a common crank pin. The first cylinder has a first cylinder axis, and a first piston is reciprocal in the first cylinder. A first piston rod is attached to the first piston. The second cylinder has a second cylinder axis, and a second piston is reciprocal in the second cylinder. A second piston rod is attached to the second piston. The first and second cylinder axes are arranged at substantially 90° to each other. The first and second piston rods engage the common crank pin such that the first piston and the second piston are commonly driven by the common crank pin.

A noise reduction device of compressor for gas is arranged at the inlet end of the compressor. The noise reduction device includes a noise reduction gas return housing and a plurality of gas inlet small pipes, gas inlet large pipes, gas return large pipes, and gas return small pipes, respectively arranged in the noise reduction gas return housing. The design and arrangement that the gas inlet large pipes and the gas return large pipes are respectively sleeved on the gas inlet small pipes and the gas return small pipes changes the moving path of the gas in the noise reduction gas return housing in an instantaneously reverse manner. Such moving path change mainly reduces the flow rate of the gas, so that the noise generated by the gas can be effectively reduced.

A high pressure gas lift compressor system and method of using the system for supplying compressed gas to multiple wells are provided. The system includes a compressor having multiple compressor cylinders. Each cylinder has its own gas inlet line and dedicated gas outlet line that supplies compressed gas from that cylinder directly to a wellbore to provide artificial gas lift. Each cylinder also has its own control valve upstream of the cylinder to control the suction pressure to the cylinder. A desired gas flow rate to each well may be input, and the control valve is adjusted accordingly to achieve the flow rate. By inputting a flow rate for each separate cylinder, the flow rate to each well may be independently controlled.

A system, apparatus, and method for improving performance of a pressurized system that attenuates pulsations in gases having varying acoustic velocities.