Pumps are provided, more particularly piston type pumps having increased energy efficiency, systems incorporating such piston type pumps, and methods of operating piston type pumps. The pumps are suitable for pumping of oil from an oil well or for pumping other liquids such as ground water, subterranean liquids, brackish water, sea water, waste water, cooling water, gas, coolants, and the like.

A valve for a positive displacement pump, designed for use in an artificial lift system. The valve may be either a traveling valve or a standing valve. The valve comprises a cylindrical cage, and includes a ball residing within the cage. In an open position, the ball floats up off of a seat, while in a closed position the ball sealingly lands onto the seat. The cage includes a cone to guide fluid flow after it passes the ball and reduce turbulence and pressure loss through the valve. An intake below the seat gradually reduces in diameter, providing a minimum inner diameter that is less than a diameter of the seat.

A fluid driving device includes: a pipe flow system configured to provide a fluid flow channel; a power system configured to provide power for the fluid to flow into and out of the pipe flow system; and a control system, configured to control the operation of the fluid driving device.

A top open cage may include a first outer diameter at a bottom portion, a second outer diameter smaller than the first outer diameter at a middle portion, a third outer diameter smaller than the second outer diameter at a top portion, a chamber internal to the bottom portion and at least a portion of the middle portion, a first set of inlets from an outer surface of the middle portion to a middle section of the chamber, and a second set of inlets from an outer surface of the middle portion to the top end of the chamber. The chamber may be defined by a first inner diameter at a bottom end of the chamber and a second inner diameter smaller than the first inner diameter at a top end of the chamber.

The present disclosure relates to a modular fluid pump system for configuring a fluid pump in a selected one of first and second configurations. The system may have a first pump casing with a first diameter, and a second pump casing with a second diameter smaller than the first diameter. A tubular frame may be included along with a first float having a first diameter positioned over the tubular frame for sliding longitudinal movement along the tubular frame. The first pump casing may be used to configure the fluid pump in the first configuration, to thus provide a first degree of clearance between the first float and an inner surface of the first pump casing, or alternatively the second pump casing may be used to configure the fluid pump in the second configuration, which provides a second degree of clearance between the first float and an inner of the second pump casing.

A top open cage may include a first outer diameter at a bottom portion, a second outer diameter smaller than the first outer diameter at a middle portion, a third outer diameter smaller than the second outer diameter at a top portion, a chamber internal to the bottom portion and at least a portion of the middle portion, a first set of inlets from an outer surface of the middle portion to a middle section of the chamber, and a second set of inlets from an outer surface of the middle portion to the top end of the chamber. The chamber may be defined by a first inner diameter at a bottom end of the chamber and a second inner diameter smaller than the first inner diameter at a top end of the chamber.

Provided is a high-pressure fuel pump that ensures oil tightness even at high fuel pressure and has a small and lightweight inexpensive discharge valve structure. Therefore, a high-pressure fuel pump according to the present invention includes: a discharge valve arranged on a discharge side of a pressurizing chamber; a discharge valve seat on which the discharge valve is seated; and a facing member configured independently as a separate member from the discharge valve seat and located on an opposite side of the discharge valve seat with the discharge valve interposed therebetween, in which a stroke direction regulating portion that regulates displacement of the discharge valve in a stroke direction is formed on a tapered surface of the facing member.

A downhole pump used for a reciprocating pump system includes a barrel coupling to a tubing string and having a standing valve and includes a plunger coupling to a rod string and having a traveling valve. One or both of the valves can include an assembly comprising a housing, an insert, a ball, and a seat. The insert allowing for flow therethrough defines a ball stop at one end has a ball passage at the other end. The insert positions in flow passage of the housing, and one of the ends engages a shoulder in the passage. The insert includes sidewalls and a conical body to reduce turbulence, flow velocity, gas breakout, ball chatter, and the like.

Pumps are provided, more particularly piston type pumps having increased energy efficiency, systems incorporating such piston type pumps, and methods of operating piston type pumps. The pumps are suitable for pumping of oil from an oil well or for pumping other liquids such as ground water, subterranean liquids, brackish water, sea water, waste water, cooling water, gas, coolants, and the like.

There is provided an airless paint spray pump wherein the pump is a double acting piston pump having an inlet communicating with a source of paint, a motor for driving the pump, a pressure controller for controlling the pressure of the pressurized paint delivered by the pump, and a filter for filtering the paint delivered by the pump. The pump includes features which increase the accessibility of the components thereof, prevent the incorrect installation of the seal packings in the pump cylinder, and allow the assembly of the piston in the pump cylinder properly aligned with the cylinder so as not to damage the seal packings therein.