A packing assembly for a pump fluid end comprising: a packing screw; a packing carrier; and a packing, wherein the packing screw, the packing carrier, and the packing are each cylindrical with a width measured along a central axis thereof that is less than a minimum spacing distance of a pump comprising the pump fluid end and a pump power end, wherein the pump fluid end comprises a reciprocating element bore in which a reciprocating element can be reciprocated via the pump power end via connection of the reciprocating element to a reciprocating element adapter coupled with a pushrod and crankshaft of the pump power end, wherein the minimum spacing distance is an axial distance measured along the central axis between a back of the pump fluid end and a front end of the reciprocating element adapter when the crankshaft of the pump power end is at top dead center.

A pump comprising a pump fluid end having a reciprocating element bore; a reciprocating element having a front end opposite a fluid intake end and comprising a peripheral wall defining a hollow cylindrical body; a movable manifold comprising a reciprocating element end fluidly connected with the fluid intake end of the reciprocating element, whereby the reciprocating element end of the movable manifold moves in a same axial direction as the reciprocating element during reciprocation of the reciprocating element within the pump fluid end, and a fluid intake end configured for fluid coupling with a stationary fluid manifold such that fluid can be introduced into the movable manifold via the stationary fluid manifold and the fluid intake end of the movable manifold; and a power end operatively connected to the reciprocating element and operable to reciprocate the reciprocating element in the pump fluid end.

A valve seat comprising a primary retention component to retain the valve seat in a valve seat housing upon seating of the valve seat in the valve seat housing, and a secondary retention component to at least temporarily retain the valve seat in the valve seat housing during seating of the valve seat in the valve seat housing, whereafter the valve seat is primarily retained in the valve seat housing via the primary retention component.

A pump comprising a bore pump fluid end having a reciprocating element bore, a discharge valve assembly comprising a discharge valve seat and a discharge valve body, and a suction valve assembly comprising a suction valve seat and a suction valve body; a hollow, cylindrical reciprocating element; a hollow reciprocating element adapter comprising a first end having a fluid inlet opposite a second end having a fluid outlet, wherein the second end of the reciprocating element adapter is connected to and in fluid communication with the fluid intake end of the reciprocating element; a pump power end having a push rod connected to the first end of the reciprocating element adapter; and a movable manifold comprising a reciprocating element end and a fluid intake end, wherein the reciprocating element end of the movable manifold is connected to and in fluid communication with the fluid inlet of the reciprocating element adapter.

The disclosure herein generally relates to sealing elements for valves and methods for forming the same. A valve component has a body which includes a guide portion, a stem, and a sealing portion between the guide portion and the stem. The sealing portion has a front surface facing the guide portion, a back surface facing the stem, and a recess for a sealing element formed in a periphery of the sealing portion; and one or more passages extending between the back surface of the sealing portion and the recess.

The disclosure herein generally relates to sealing elements for valves and methods for forming the same. A valve component has a body which includes a guide portion, a stem, and a sealing portion between the guide portion and the stem. The sealing portion has a front surface facing the guide portion, a back surface facing the stem, and a recess for a sealing element formed in a periphery of the sealing portion; and one or more passages extending between the back surface of the sealing portion and the recess.

A plunger, a hydraulic end and a plunger pump are disclosed. The plunger includes a plunger body, the plunger body includes a flow channel; a first liquid inlet hole is located in the plunger body and passes through the sidewall of the plunger body; the plunger body includes a first end portion and a second end portion, a flow channel extends from the first end portion to the second end portion, a part of the flow channel close to the first end portion is closed, the flow channel extends to the second end portion and forms a first opening, the first liquid inlet hole is communicated with the flow channel, the first valve assembly is located at the first opening, and is configured to allow fluid to flow out from the flow channel at the first opening and prevent fluid from flowing back to the flow channel from outside.

A pump comprising a bore pump fluid end having a reciprocating element bore, a discharge valve assembly comprising a discharge valve seat and a discharge valve body, and a suction valve assembly comprising a suction valve seat and a suction valve body; a hollow, cylindrical reciprocating element; a hollow reciprocating element adapter comprising a first end having a fluid inlet opposite a second end having a fluid outlet, wherein the second end of the reciprocating element adapter is connected to and in fluid communication with the fluid intake end of the reciprocating element; a pump power end having a push rod connected to the first end of the reciprocating element adapter; and a movable manifold comprising a reciprocating element end and a fluid intake end, wherein the reciprocating element end of the movable manifold is connected to and in fluid communication with the fluid inlet of the reciprocating element adapter.

The present invention is a superimposed standing valve and related method of harvesting oil and gas using a conventional rod pump equipped with the superimposed standing valve. The superimposed standing valve includes a donut disposed between a top cylinder and a main standing valve such that the donut can slide along the top cylinder a fixed valve stroke. A plurality of openings are sealed and unsealed by the movement of the donut. The superimposed standing valve isolates the pump from the head pressure of the oil and gas inside of the tubing thereby enabling the standing valve of the pump to remain open on both the upstroke and the downstroke. As a result, the superimposed standing valve increases pump efficiency and reduces the risk of gas locking.

A positive displacement pump is provided. The pump comprises at least one piston operable to be powered by a power source and to pressurize a fluid. The at least one piston comprises an at least partially hollow piston wherein a flow of fluid is induced into and through the piston and a surrounding piston chamber. The piston preferably comprises a direct-mounted outlet valve for controlling a flow of fluid into and out of the piston.