Subsurface packer inflating pump

Claim 1

A SURFACE-OPERABLE SUBSURFACE PACKER INFLATING PUMP APPARATUS COMPRISING A LONGITUDINALLY EXTENDING HOUSING CONNECTED AT THE LOWER END THEREOF TO A PACKER AND SUSPENDED IN A WELL BORE FROM THE UPPER END THEREOF ON A WIRE LINE; DRIVE MEANS INCLUDING A ROTATABLE SHAFT ARRANGED IN SAID HOUSING; A ROTATABLE PAWL HOLDER MOUNTED ON SAID SHAFT; OPPOSITELY DIRECTED PAWLS ARRANGED ON SAID PAWL HOLDER; A STATIONARY WALL MEMBER SECURED TO SAID HOUSING; A ROTATABLE PAWL FOLLOWER PROVIDED WITH A KEY POSITIONED ADJACENT SAID PAWLS AND THREADEDLY CONNECTED TO SAID WALL MEMBER SUCH THAT ROTATION OF SAID PAWL FOLLOWER IN ONE CIRCUMFERENTIAL DIRECTION MOVES SAID PAWL FOLLOWER UPWARDLY AND ROTATION OF SAID PAWL FOLLOWER IN A REVERSE CIRCUMFERENTIAL DIRECTION MOVES SAID PAWL FOLLOWER DOWNWARDLY, ONE OF SAID PAWL FOLLOWERS ENGAGING SAID KEY WHEN SAID SHAFT AND PAWL HOLDER ARE ROTATED IN SAID ONE CIRCUMFERENTIAL DIRECTION TO ROTATE SAID PAWL FOLLOWER UNTIL IT MOVES A SELECTED LONGITUDINAL DISTANCE UPWARDLY WHERE SAID ONE PAWL DISENGAGES FROM SAID KEY AND SAID PAWL HOLDER ROTATES FREELY, SAID OTHER PAWL ENGAGING SAID KEY WHEN SAID SHAFT AND PAWL HOLDER ARE ROTATED IN SAID REVERSE CIRCUMFERENTIAL DIRECTION TO ROTATE SAID PAWL FOLLOWER UNTIL IT MOVES A SELECTED LONGITUDINAL DISTANCE DOWNWARDLY, WHERE SAID OTHER PAWL DISENGAGES FROM SAID KEY AND SAID PAWL HOLDER ROTATES FREELY; A PUMP CYLINDER ARRANGED IN SAID HOUSING; A RECIPROCATING PISTON ARRANGED IN SAID CYLINDER TO FORM AN EXPANSIBLE CHAMBER THEREIN; A RECIPROCATING PISTON ROD CONNECTED TO SAID PISTON; MEANS INTERCONNECTING SAID SHAFT AND SAID PISTON ROD ADAPTED TO TRANSLATE THE ROTATIONAL MOTION OF SAID SHAFT TO THE RECIPROCATING MOTION OF SAID PISTON ROD; A TRAVELING VALVE ARRANGED ON SAID PISTON ADAPTED TO ADMIT AND DISCHARGE FLUID TO AND FROM, RESPECTIVELY, SAID CHAMBER UPON RECIPROCATION OF SAID PISTON; A STANDING VALVE ARRANGED IN SAID CYLINDER ADAPTED TO PERMIT DISCHARGE OF FLUID FROM SAID CHAMBER UPON MOVEMENT OF SAID PISTON IN ONE DIRECTION AND TO PREVENT DISCHARGE OF FLUID FROM SAID CHAMBER ON MOVEMENT OF SAID PISTON IN AN OPPOSITE DIRECTION; SAID HOUSING BEING PROVIDED WITH AN OPENING FLUIDLY COMMUNICATING THE INTERIOR AND EXTERIOR THEREOF ADAPTED TO SUPPLY WELL FLUID TO SAID CHAMBER VIA SAID TRAVELING VALVE; A FIRST PASSAGE IN SAID HOUSING FLUIDLY COMMUNICATING SAID STANDING VALVE AND SAID PACKER; SAID HOUSING BEING PROVIDED WITH A PACKER DRAIN PORT; A SECOND PASSAGE IN SAID HOUSING FLUIDLY COMMUNICATING WITH SAID FIRST PASSAGE AND SAID DRAIN PORT; SAID PAWL FOLLOWER HAVING AN ANNULAR GROOVE; A CAM FOLLOWER ARRANGED IN SAID GROOVE AND MOVABLE WITH THE LONGITUDINAL MOVEMENT OF SAID PAWL FOLLOWER; AND A LONGITUDINALLY MOVABLE DRAIN PORT PLUG HOLDER CONNECTED TO SAID CAM FOLLOWER AND LONGITUDINALLY MOVABLE THEREWITH FROM A FIRST TO A SECOND POSITION AND VICE VERSA; A DRAIN PORT PLUG ATTACHED TO SAID PLUG HOLDER AND MOVABLE THEREWITH, SAID PLUG ITSELF ALSO BEING LONGITUDINALLY MOVABLE FROM A FIRST TO A SECOND POSITION AND VICE VERSA; BIASING MEANS ARRANGED ADJACENT SAID PLUG FOR URGING SAID PLUG TO ITS FIRST POSITION WHEREBY WHEN SAID PLUG HOLDER AND SAID PLUG ARE IN THEIR FIRST POSITIONS SAID DRAIN PORT IS CLOSED TO FLUID COMMUNICATION THERETHROUGH AND WHEN SAID PLUG HOLDER IS IN ITS FIRST POSITION AND SAID PLUG IS IN ITS SECOND POSITION AND ALSO WHEN SAID PLUG HOLDER IS IN ITS SECOND POSITION AND SAID PLUG IS IN EITHER ITS FIRST OR SECOND POSITIONS FLUID COMMUNICATION THROUGH SAID DRAIN PORT IS PERMITTED, SAID PLUG BEING MOVED FROM ITS FIRST TO ITS SECOND POSITION WHEN SAID PLUG HOLDER IS IN ITS FIRST POSITION BY AN INCREASE IN FLUID PRESSURE IN SAID SECOND PASSAGEWAY ABOVE A SELECTED PRESSURE.