Hydraulic well pump assemblies

Claim 1

A HYDRAULIC WELL PUMP ASSEMBLY INCLUDING A PUMP CYLINDER MEMBER, A PUMP PLUNGER MEMBER IN THE PUMP CYLINDER MEMBER, ONE OF THE PUMP MEMBERS BEING ADAPTED TO BE ANCHORED IN A WELL TUBING, DOWNWARDLY-CLOSING VALVE MEANS IN THE PUMP CYLINDER MEMBER, DOWNWARDLY-CLOSING VALVE MEANS IN THE PUMP PLUNGER MEMBER, ONE OF THE PUMP MEMBERS BEING RECIPROCABLE WITH RESPECT TO THE OTHER, THE RECIPROCABLE PUMP MEMBER HAVING PASSAGE MEANS FROM ITS VALVE MEANS TO THE EXTERIOR OF THE PUMP, A MOTOR CYLINDER ABOVE AND CONNECTED TO THE PUMP MEMBER ADAPTED TO BE ANCHORED IN A WELL TUBING, A MOTOR PISTON RECIPROCABLE IN THE MOTOR CYLINDER, FIRST MEANS SEALING THE INTERIOR OF THE MOTOR CYLINDER BELOW THE MOTOR PISTON, RECIPROCATING MEANS CONNECTING THE MOTOR PISTON TO THE RECIPROCATING PUMP MEMBER AND EXTENDING THROUGH THE SEALING MEANS, A CONDUCTOR EXTENDING UPWARDLY FROM THE MOTOR CYLINDER, A TUBULAR STEM EXTENDING UPWARDLY FROM THE MOTOR PISTON INTO THE CONDUCTOR AND HAVING ITS INTERIOR EXPOSED TO THE INTERIOR OF THE MOTOR CYLINDER BELOW THE MOTOR PISTON, SECOND SEALING MEANS IN THE CONDUCTOR RECEIVING THE TUBULAR STEM IN SLIDING SEALING ENGAGEMENT, THE CONDUCTOR HAVING AN OUTLET OPENING EXTERIORLY OF THE PUMP BETWEEN THE MOTOR PISTON AND THE SECOND SEALING MEANS, A REVERSING CYLINDER ADAPTED TO BE MOUNTED AT THE TOP OF A WELL IN WHICH THE PUMP CYLINDER MEMBER IS DISPOSED, A REVERSING PISTON IN THE REVERSING CYLINDER, THE REVERSING CYLINDER HAVING A PRODUCED LIQUID OUTLET INTERMEDIATE ITS ENDS SO POSITIONED AS TO BE COVERED BY THE REVERSING PISTON WHEN THE LATTER IS AT ONE END OF ITS STROKE IN THE REVERSING CYLINDER AND TO BE EXPOSED TO THE INTERIOR OF THE REVERSING CYLINDER WHEN THE REVERSING PISTON IS AT THE OTHER END OF ITS STROKE IN THE REVERSING CYLINDER, MEANS EXPOSING ONE END OF THE REVERSING PISTON TO THE EXTERIOR OF THE PUMP, AND MEANS FOR SUPPLYING MOTIVE LIQUID UNDER PRESSURE ALTERNATELY TO THE OPPOSITE END OF THE REVERSING PISTON AND TO THE INTERIOR OF THE CONDUCTOR ABOVE THE SECOND SEALING MEANS.