Apparatus for actuating sleeve valves and the like in wells

Claim 1

AN ACTUATING APPARATUS FOR SUB-SURFACE INSTRUMENTALITIES IN A WELL OR THE LIKE ADAPTED TO BE OPERATED BY A FLUID PRESSURE PUMP AND CONTROL VALVE UNIT HAVING A SUSPENSION AND POWER CABLE SECURED THERETO, SAID APPARATUS COMPRISING A TUBULAR CASING SECURED DEPENDINGLY TO SAID UNIT, SAID CASING HAVING AN INTERNAL SHOULDER INTERMEDIATE ITS ENDS, SAID SHOULDER HAVING FLUID PASSAGE MEANS THERETHROUGH, A PISTON WITHIN SAID CASING ABOVE SAID SHOULDER AND HAVING FLUID PASSAGE MEANS COMMUNICABLE WITH THE PASSAGE MEANS OF SAID SHOULDER AND WITH AN INNER FLUID OUTLET OF SAID UNIT AND ADAPTED TO BE SEATED UPON SAID SHOULDER, A ROD DEPENDINGLY SECURED TO SAID PISTON AND EXTENDING BELOW THE LOWER END OF SAID CASING, A FIRST EXPANDER HEAD ON SAID ROD NEAR THE LOWER END THEREOF, A FIRST PISTON HEAD SLIDABLY SURROUNDING SAID ROD WITHIN SAID CASING BELOW SAID SHOULDER, SAID ROD HAVING A STOP SHOULDER THEREON BELOW SAID SHOULDER AND ABOVE SAID FIRST PISTON HEAD, A TUBE DEPENDINGLY SECURED TO THE FIRST PISTON HEAD AND SLIDABLY SURROUNDING SAID ROD AND EXTENDING BELOW THE LOWER END OF SAID CASING, A FIRST EXPANDING JAW ASSEMBLY SECURED TO SAID TUBE NEAR THE LOWER END THEREOF AND HAVING SPACED JAWS ADJACENT TO SAID FIRST EXPANDER HEAD AND EXPANDED THEREBY DURING RELATIVE MOVEMENT BETWEEN SAID JAWS AND HEAD, A SECOND PISTON