Handling tools for disassembling and installing well devices

Claim 1

IN A TOOL FOR DISASSEMBLING AND RETRIEVING FROM A REMOTE POINT OF INSTALLATION A TUBULAR WELL DEVICE SECURED BY A PLURALITY OF RADIALLY BIASED LATCH ELEMENTS AND HAVING UPWARDLY EXPOSED MEANS BY WHICH THE LATCH ELEMENTS CAN BE ACTUATED TO DISENGAGED POSITION, THE COMBINATION OF A BODY ADAPTED FOR ATTACHMENT TO A STRING OF HANDLING PIPE AND HAVING A PORTION INSERTABLE DOWNWARDLY INTO THE WEL DEVICE TO BE RETRIEVED; MEANS FOR SECURING SAID BODY TO THE WELL DEVICE WHEN SAID BODY IS LOWERED BY THE HANDLING STRING TO SUCH REMOTE POINT OF INSTALLATION AND SAID PORTION IS INSERTED INTO THE WELL DEVICE; FLUID PRESSURE OPERATED LATCH ELEMENT ACTUATING MEANS COMPRISING A DEPENDENT RIGID ANNULAR MEMBER SPACED OUTWARDLY FROM SAID BODY AND CARRIED THEREBY, SAID ANNULAR MEMBER BEING DIMENSIONED TO ACCOMMODATE THE UPPER END PORTION OF THE WELL DEVICE AND HAVING A LOWER PORTION DIMENSIONED AND DISPOSED TO ENGAGE THE UPWARDLY EXPOSED MEANS OF THE WELL DEVICE FOR ACTUATION OF THE LATCH ELEMENTS TO DISENGAGED POSITION, AND EXPANSIBLE CHAMBER POWER MEANS CARRIED BY SAID BODY AND ARRANGED TO DRIVE SAID ANNULAR MEMBER DOWNWARDLY INTO ENGAGEMENT WITH THE UPWARDLY EXPOSED MEANS OF THE WELL DEVICE WHEN FLUID UNDER PRESSURE IS SUPPLIED TO SAID POWER MEANS; AND DUCT MEANS COMMUNICATING WITH THE INTERIOR OF THE HANDLING STRING WHEN SAID BODY IS ATTACHED THERETO, SAID DUCT MEANS BEING CONNECTED TO SAID EXPANSIBLE CHAMBER POWER MEANS WHEREBY THE LATTER CAN BE OPERATED BY PRESSURE FLUID SUPPLIED THROUGH THE HANDLING STRING.