Hydraulic Oil Well Pumping System, and Method for Delivering Gas From a Well

A method of compressing produced gas at a well site, the well site having a wellbore that extends into an earth surface, and the method comprising:

• providing an elongated hydraulic lift cylinder, the lift cylinder having a lift piston that is movable between upper and lower rod positions within the lift cylinder;
• operatively connecting the lift piston to a rod string, wherein the rod string extends downwardly from the lift piston and into the wellbore;
• providing a downhole pump in the oil well proximate a lower end of the rod string;
• providing a hydraulic pump that is powered by a prime mover;
• fluidically connecting the hydraulic pump and the hydraulic cylinder with an oil line that cyclically transmits hydraulic fluid from the pump into the lift cylinder to act against the lift piston;
• providing at least one compressor cylinder, each of the at least one compressor cylinder having a compressor piston that is movable between upper and lower rod positions with reciprocating movement of the lift piston;
• placing the at least one compressor cylinder in fluid communication with a gas line;
• producing non-condensable hydrocarbon fluids from the wellbore and into the gas line;
• reciprocating the lift piston and operatively connected rod string and downhole pump in order to pump condensable hydrocarbon fluids from the wellbore to a surface;
• and
• reciprocating the compressor piston with the lift piston in order to increase pressure in the gas line and move the non-condensable hydrocarbon fluids through the gas line.