A gas processing well head pump assembly consisting of a reciprocating piston compressor pump having input and output ports; an internal combustion engine connected operatively to the compressor pump; a first gas conduit having a wall, a well head end, a pump end, and having an expanded bore between the well head and pump ends, the pump end being fixedly attached to the gas pump's input port, the wall having a first and at least a second aperture overlying the expanded bore; a second gas conduit having a pump end fixedly attached to the gas pump's output port, the second gas conduit entering the first gas conduit's expanded bore through the first aperture, and the second gas conduit exiting the expanded bore through the at least second aperture; and a natural gas liquids separator positioned within the first gas conduit's expanded bore.