Electronic ram pump controller

The electronic controller of any preceding claim, further comprising a spring member that is configured to produce a force on the elongate stem in a direction towards its first end.

The electronic controller of any preceding claim, wherein the limiting element is configured to be moveable parallel to the longitudinal axis of the elongate stem.

The electronic controller of any preceding claim, wherein the housing comprises a base plate onto which the limiting element is mounted.

The electronic controller of any preceding claim, wherein the housing includes mounting elements allowing the electronic controller to be retrofitted to the hydraulic ram pump.

The electronic controller of any preceding claim, wherein:

• the electronic controller further comprises a power storage device that is configured to power the control circuit and/or drive unit;
• and
• the power storage device is configured to receive power from at least one of an external power supply, a solar cell, a micro hydro generator, or an internal turbine in the hydraulic ram pump.

The electronic controller of any preceding claim, wherein either:

• the drive unit comprises a screwthread connected to a stepper motor controlled by the control circuit, and rotation of the screwthread moves the limiting element parallel to the axis of the elongate stem;
• or
• the drive unit comprises a pneumatic or hydraulic element controlled by the control circuit and configured to move the limiting element parallel to the axis of the elongate stem.

The electronic controller of any preceding claim, wherein:

• the control circuit includes a memory that is configured to store previous instructions sent to the drive unit;
• and
• the control circuit is configured to determine the position of the limiting element with respect to the housing based on the stored previous instructions.

The electronic controller of any preceding claim, wherein the control circuit is configured to send and/or receive telemetry signals to/from a remote operator which can control the electronic controller remotely.

The electronic controller of any preceding claim, wherein the first end of the elongate stem is suitable for coupling to either the impulse value or the delivery valve of the hydraulic ram pump.

A hydraulic ram pump electronic controller comprising:

• a housing for connection to a hydraulic ram pump;
• a drive unit coupled to a retaining arm in a valve in the hydraulic ram pump, wherein the retaining arm controls the maximum aperture of the valve as it opens and closes under the action of a fluid in the hydraulic ram pump, the drive unit being configured to adjust the positon of the retaining arm with respect to the housing;
• a control circuit connected to the drive unit, the control circuit being configured to instruct the drive unit to adjust the position of the retaining arm based on a desired maximum valve aperture.