Well sealing, bridging, plugging and testing attachment device

Claim 1

AN EXPANSIBLE PACKER AND SEALING UNIT COMPRISING A HOLLOW SLEEVE-LIKE ELONGATED BODY ADAPTED FOR INSERTION IN AND MOVEMENT THROUGH A WELL BORE, AN INFLATABLE AND RADIALLY EXPANSIBLE AND CONTRACTABLE PACKER ELEMENT SECURED TO AND SURROUNDING SAID BODY, SAID PACKER ELEMENT HAVING FLUID TIGHT CONNECTION TO SAID BODY DEFINING THEREWITH AN EXPANSIBLE CHAMBER, A MAIN PASSAGE EXTENDING LONGITUDINALLY OF SAID HOLLOW BODY FOR THE PASSAGE OF PRESSURE FLUID THERETHROUGH, A LATERAL BRANCH PASSAGE ESTABLISHING COMMUNICATION BETWEEN SAID MAIN PASSAGE AND SAID CHAMBER, A CONTROL VALVE IN SAID BRANCH PASSAGE CONTROLLING FLOW THERETHROUGH, UPPER AND LOWER CONTROL VALVES IN SAID MAIN PASSAGE DISPOSED ON OPPOSITE SIDES OF THE JUNCTION OF SAID MAIN AND BRANCH PASSAGES AND MEANS FOR SELECTIVELY OPERATING EACH OF SAID CONTROL VALVES, SAID MAIN AND BRANCH PASSAGES BEING DISPOSED IN THE WALL OF SAID HOLLOW BODY.