A bypass plunger includes a unibody, or one-piece hollow body and valve cage, retains a dart valve within the valve cage portion using a threaded retaining nut secured by crimple detents, and includes sealable flow parts. A series of helical grooves surround the central portion of the outer surface of the hollow body of the plunger to control spin during descent. A canted-coil-spring disposed within the retaining nut functions as a clutch. The valve cage includes ports that may be configured to control flow through the plunger during descent. Other embodiments include clutch assemblies using canted-coil springs with split bobbins, and surfaced valve stems surfaced.

A plunger actuated valve system is provided. The plunger actuated valve system includes a discharge valve, a stem extending from the discharge valve, and a suction valve coupled with the stem. The suction valve can be operable to abut against a plunger as the plunger translates in a first direction such that the suction valve is in a closed configuration. The suction valve includes a latching component operable to abut against a catch surface of the plunger when the plunger translates in a second direction opposite of the first direction such that the suction valve translates in the second direction.

A surge suppressor includes a boost mechanism configured to balance pressures between a working fluid and a process fluid. The boost mechanism includes a boost member that is acted on by a charge pressure of the working fluid. A shaft extends from the boost member to a pressure control member bounding the process fluid and acting on the process fluid. The boost member can have a larger effective area than the pressure control member to provide a pressure multiplication between the charge pressure and the process fluid pressure. In addition, pressure control valves are mounted to an air housing and actuated open by the boost mechanism. Actuating one of the pressure control valves open increases the charge pressure. Actuating the other pressure control valve open decreases the charge pressure.

A pump having significantly minimized or no ullage for pumping material (fluid or aggregate).

The present disclosure provides an oil scavenge pump, which includes a cap member, a piston member and a resilient member. The cap member and the piston member are connected to each other and with the resilient member therebetween. The cap member includes a cap head, a valve connected to the cap head, a resilient unit disposed between the cap head and the valve, and a first sphere disposed between the resilient unit and the valve. The piston member includes a valve stopper, a main portion, a second sphere, a rod portion, a first-seal ring and a second-seal ring. The main portion has two ends respectively connected to the valve stopper and the rod portion. The second sphere is disposed between the valve stopper and the main portion. The first-seal ring and the second-seal ring respectively surround the main portion and the rod portion.

The present invention provides a downhole suction rod pump assembly for use in pumping formation fluid from an oil well, and more specifically, provides a rotor operable to generate a vortex in a pump barrel without imparting torque to the plunger. The improvements to a suction rod pump assembly may be incorporated into any oil well pumping system having a linear rod and or rod string. The rotor vortex displaces formation fluid above a plunger assembly, thereby preventing heavier debris in the formation fluid from settling or lodging between a plunger and barrel boundary, thus extending the practical life of the pump.

The invention relates to a fluid compression apparatus having a plurality of compression stages, comprising a first compression chamber, a second compression chamber, an intake system communicating with the first compression chamber which is configured to allow fluid to be compressed into said first compression chamber, a transfer system configured to allow in an open position the transfer of fluid from the first compression chamber to the second compression chamber, a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the exit of compressed fluid, the piston being translationally mobile in a longitudinal direction, wherein the first compression chamber is defined by a fixed lower cavity, a lower end of the piston and a first sealing system formed between the piston and a wall of the cavity, wherein the second compression chamber is defined by a fixed upper cavity, an upper end of the piston and a second sealing system formed between the piston and a wall of the upper cavity. The invention is characterized in that, in the operating configuration of the apparatus, the longitudinal direction of translation of the mobile piston is vertical, the intake system being located at a lower end of the apparatus and the discharge port being located in an upper part of the apparatus above the transfer system.

The invention relates to a fluid compression apparatus having a plurality of compression stages, comprising a first compression chamber, a second compression chamber, an intake system communicating with the first compression chamber which is configured to allow fluid to be compressed into said first compression chamber, a transfer system configured to allow in an open position the transfer of fluid from the first compression chamber to the second compression chamber, a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the exit of compressed fluid, the piston being translationally mobile in a longitudinal direction, wherein the first compression chamber is defined by a fixed lower cavity, a lower end of the piston and a first sealing system formed between the piston and a wall of the cavity, wherein the second compression chamber is defined by a fixed upper cavity, an upper end of the piston and a second sealing system formed between the piston and a wall of the upper cavity. The invention is characterized in that, in the operating configuration of the apparatus, the longitudinal direction of translation of the mobile piston is vertical, the intake system being located at a lower end of the apparatus and the discharge port being located in an upper part of the apparatus above the transfer system.

A fluid pump is shown, comprising: a chamber comprising an inlet and an outlet, the outlet comprising a non-return valve, the chamber having a cavity comprising a cylinder; a piston slidably disposed within the cylinder; and a Tesla valve in fluid communication with the inlet, wherein the fluid pump is configured to pump fluid from the inlet to the outlet by reciprocation of the piston within the cylinder.

A fluid pump is shown, comprising: a chamber comprising an inlet and an outlet, the outlet comprising a non-return valve, the chamber having a cavity comprising a cylinder; a piston slidably disposed within the cylinder; and a Tesla valve in fluid communication with the inlet, wherein the fluid pump is configured to pump fluid from the inlet to the outlet by reciprocation of the piston within the cylinder.