A drop-in insert for a valve cage is adapted for use with a subsurface pump. The insert can be positioned in a valve cage housing. The insert includes a cradle, a base, a plurality of angled ribs, and an upper ring. In one embodiment, the insert may also include an extended nose region. Upper ring can abut an interior diameter of the housing, providing a smooth transition for pumped fluid, thereby decreasing turbulent fluid flow and promoting improved fluid flow during pumping operations. The insert can be dropped into position in the housing. Alternatively, the insert can be positioned in the housing by an interference fit or the like. The housing and insert can be part of a valve cage assembly that includes a ball, seat, seat plug, and end cap. The assembly may include an O-ring component which can cushion the insert, thereby prolonging the life of the insert.

In a piston pump, for example, a piston sub assembly includes a columnar plunger that lies along an axial direction, a cap that is fixed with the plunger to cover an adjacent region between a first end surface at one end in the axial direction of the plunger and the first end surface at a first outer circumferential surface of the plunger, and provided with an intake passage extending from an inlet on an outer side of the first outer circumferential surface to an outlet on an outer side of the first end surface outside the plunger, and a first valve seat of a first intake check valve located at the outlet, and a seal member that is a member different from the cap and that prevents leakage of hydraulic fluid from the first chamber through a gap between the first cylinder and the piston sub assembly.

A disclosure pertains to a reciprocating pump configured for pumping fillers or aggregates or cementitious material and the like.

A disclosure pertains to a reciprocating pump configured for pumping fillers or aggregates or cementitious material and the like.

An improved ball valve on a pump system comprising a ball valve having a ball, a first end arranged for operatively engaging the pump system, a first axial port on the first end sufficiently narrow to prevent the passage of the ball, a ball-seat disposed on the first end with a plurality of ports annularly disposed around the ball and extending through the ball-seat, a second axial port on a second end sufficiently narrow to prevent the passage of the ball, and the second end of the ball valve arranged for connecting to the pump system. The improved ball valve further comprising a ball seat without a first axial port. The improved ball valve further comprising a plurality of ports extending outwardly from the first axial port and extending through the ball-seat.

A method of producing fluid from a wellbore includes operating a pump located proximate to a zone of fluid influx in the wellbore to draw a fluid from a reservoir into the wellbore at the zone of fluid influx. A first section of a tubing string is coupled to, and extends above, the pump, and a second section of the tubing string is coupled to, and extends below, the pump. A packer seals a first annular space around the first section of the tubing string. The method further includes operating the pump to move the fluid from the second section of the tubing string and into the first section of the tubing string.

A method of producing fluid from a wellbore includes operating a pump located proximate to a zone of fluid influx in the wellbore to draw a reservoir fluid from a reservoir into the wellbore at the zone of fluid influx. The pump is coupled to a tubing string extending above the pump, and a packer is coupled to the tubing string proximate to an upper end of the zone of fluid influx and seals an annular space around the tubing string. The method includes operating the pump to produce the reservoir fluid from the wellbore through the tubing string. A pump includes a drive chamber with a drive piston, a production chamber with a production piston coupled to the drive piston, and axially separated traveling valves.

A delivery device for delivering a fluid medium having a delivery drive, a pump device and a scoop device. The delivery drive is arranged at a first end of a pipe, and the pump device and the scoop device are arranged inside the pipe. The scoop device includes a foot valve, which is arranged at a second end of the pipe and controls an inlet for an inflow of medium into a piston chamber. A piston, which sub-divides the piston chamber into an inflow area and a discharge area, is arranged in the piston chamber. The inflow area and the discharge area are or can be connected via the piston, and the piston, via a piston rod, is movable between a retracted position and an extended position inside the piston chamber by the delivery drive.

A piston is the driven component within a pump. The piston is driven along a longitudinal axis to pump a fluid through the pump. The fluid flows through the piston between an upstream end of the pump and a downstream end of the pump. The piston outputs the fluid into the downstream end of the pump at a vector offset from the longitudinal axis, thereby inducing rotation of the piston throughout the pumping process. Rotating the piston encourages even wear on various components within the pump, such as sealing rings surrounding the piston, thereby increasing the lifespan of the components and increasing the efficiency of the pump.

A hydraulic assembly, particularly for supplying a brake circuit of a vehicle brake system with fluid at brake pressure, includes a throttle element, which in the unpressurized state rests with an upper side on a first support and with an underside on a second support, the supports being formed on opposite sides of the gap. The throttle device advantageously dispenses with a spring element for axial pre-tensioning, is accordingly of compact and cost-effective construction and is moreover easy to assemble.