1½ Piston force pump

A single stroke hydraulic pump for raising production fluid against the force of gravity a substantial distance, comprising:

• a pump body having a discharge end and a pumping end;
• a powering means;
• a pump piston connected by a solid shaft within the pump body which is completely submerged in the production fluid except for a top of a column of production fluid and the powering means;
• a column of production fluid within the pump body stretching from a pump fluid output chamber on the discharge end of the pump body to a discharge reservoir above the surface of the production fluid in which the pump piston is submerged and having a static hydraulic head pressure;
• a column of power fluid within the pump body and having an hydraulic head pressure identical to when the static hydraulic head pressure of the column of production fluid is at a maximum volume, and wherein the powering means for powering the pump piston toward the discharge end results in raising the column of production fluid with the resultant discharge of a volume of production fluid into a discharge reservoir;
• isolating means for isolating the powering means from the production fluid;
• a pressure barrier to isolate the powering means from the production fluid and to restrain the stroke of the pumping piston;
• resetting means to return the pump piston to a start position after a volume of the column of production fluid has been discharged to the reservoir at a controlled rate so as not to damage the pressure barrier of the pump piston;
• entering and preventing means for allowing external production fluid into the pump body and into the column of production fluid and preventing the production fluid from flowing out when the pump piston is moved toward the discharge end;
• and wherein
• the static head of the column of production fluid is raised only once the length of the stroke of the pump piston and a volume of the production fluid is discharged from the top of the column of production fluid and the column of production fluid is returned without violent force to a point of beginning.

A single stroke hydraulic pump for raising production fluid against the force of gravity a substantial distance, comprising:

• a pump body connected to a supply tube and fluid entry tube;
• a powering means;
• a pump piston comprised of a pump piston top and a pump piston base with the pump piston top being positioned on a pumping end of the pump body and the piston base being positioned on the discharge end of the pump body, the pump piston top and the pump piston base being connected by a solid shaft within the pump body, the pump body being completely submerged in the production fluid except for a top of a column of production fluid and the powering means;
• a column of production fluid within the pump body stretching from a fluid output chamber on the discharge end of the pump body to a discharge reservoir above the surface of the production fluid in which the pump piston is submerged and having a static hydraulic head pressure;
• a column of power fluid within the pump body and having an hydraulic head pressure identical to that of the static hydraulic head pressure of the column of production fluid when the column of production fluid is at a maximum volume, and wherein the powering means for powering the pump piston toward the discharge end is isolated from the production fluid and with the powering means providing power to raise the column of production fluid with a resultant discharge of a volume of production fluid into a discharge reservoir;
• a pressure barrier is positioned between the pump piston top and pump piston base to isolate the powering means from the production fluid and to restrain the stroke of the pump piston;
• resetting means to return the pump piston to a start position after a volume of the production fluid has been discharged to the reservoir at a controlled rate so as not to damage the pressure barrier;
• entering and preventing means for allowing external production fluid into the pump body and into the column of production fluid and preventing the production fluid from flowing out when the pump piston is moved toward the discharge end;
• wherein
• the static head of the column of production fluid is raised only once the length of the stroke of the pump piston and a volume of production fluid is discharged from the top of the column of production fluid and the column of production fluid is returned without violent force to a point of beginning;
• and
• wherein the powering means is comprised of an hydraulic power cylinder having two ends and containing a pre-charge plate, the powering means being isolated from the production fluid by an end barrier through which the solid shaft slidably extends from the pre-charge plate, and having a pre-charge side on the end of the hydraulic power cylinder farthest away from the fluid output chamber, and having a pre-charge pressure therein of sufficient force to overcome the cumulative force of the column of power fluid plus internal system friction so that the pre-charge plate which is connected to the solid shaft moves toward a production fluid entry chamber that is connected to the pump body, thereby opening a pump piston ball check valve to allow production fluid in the supply tube to enter the output chamber, and after the volume of the column of production fluid is reduced by discharging into the reservoir, a power side of the hydraulic power cylinder which is separated from the pre-charge side by the pre-charge plate receives power from a remote driving means providing sufficient force to move the pre-charge plate so as to compress a precharge in the precharge side thereby moving the solid shaft and pump piston to close the pump piston ball check valve and force production fluid from the column of the production fluid into the reservoir.