Apparatus for fracturing subsurface formations

Claim 1

APPARATUS OR TREADING AN UNDERGROUND FORMATION COMPRISING, IN OPERATIVE COMBINATION, A FRACTURING LIQUID CONTAINER, AN OUTLET THEREFROM OPEN TO THE BOTTOM THEREOF, A FIRST CONDUIT OPERATIVELY CONNECTED THERETO; A FIRST PUMP MEANS, A PUMP INLET THEREON, A PUMP OUTLET THEREON, SAID FIRST CONDUIT OPERATIVELY CONNECTED TO SAID PUMP INLET, A SECOND CONDUIT OPERATIVELY CONNECTED TO SAID PUMP OUTLET; AN INSULATED HIGH PRESSURE CONTAINER, A FIRST OUTLET THEREFROM OPEN TO THE BOTTOM THEREOF, A THIRD CONDUIT OPERATIVELY CONNECTED IN SAID OUTLET, A SECOND PUMP MEANS, AN INLET THEREON AND AN OUTLET THEREON AND A FOURTH CONDUIT OPERATIVELY CONNECTED TO SAID OUTLET FOR SAID SECOND PUMP, SAID INLET TO SAID SECOND PUMP BEING OPERATIVELY CONNECTED TO SAID THIRD CONDUIT; A WELL BORE EXTENDING FROM THE GROUND SURFACE TO SAID UNDERGROUND FORMATION, A FIFTH CONDUIT IN SAID WALL BORE, AN UPPER INLET THERETO AND AN OUTLET THEREFROM ADJACENT SAID FORMATION, SEALING MEANS BETWEEN THE OUTSIDE OF SAID FIFTH CONDUIT AND THE INSIDE OF SAID WELL BORE ABOVE THE LOWER OUTLET OF SAID FIFTH CONDUIT; SAID SECOND CONDUIT AND FOURTH CONDUIT BEING OPERATIVELY CONNECTED AT A JUNCTION NEAR THE TOP OF SAID WELL, A WELL INLET VALVE WITH AN INLET OPERATIVELY CONNECTED TO SAID JUNCTION AND SAID WELL INLET VALVE HAVING AN OUTLET, SAID INLET VALVE OUTLET BEING OPERATIVELY CONNECTED TO THE TOP PORTION OF SAID FIFTH CONDUIT, A WELL OUTLET VALVE WITH AN INLET, SAID OUTLET VALVE INLET BEING OPERATIVELY CONNECTED TO THE TOP PORTION OF SAID FIFTH CONDUIT BETWEEN SAID INLET VALVE AND THE LOWER OUTLET OF SAID FIFTH CONDUIT, SAID WELL OUTLET VALVE HAVING AN OUTLET OPERATIVELY CONNECTED TO THE ATMOSPHERE; MEANS CONTROLLING SAID SECOND PUMP MEANS AND OPERATIVELY CONNECTED THERETO, FLOW SENSING MEANS LOCATED BETWEEN SAID FRACTURING LIQUID CONTAINER AND SAID JUNCTION AND OPERATIVELY CONNECTED TO SAID MEANS CONTROLLING THE SECOND PUMPING MEANS, AND PROVIDING A PREDETERMINED RATIO OF RATE OF FLOW OF LIQUID THROUGH SAID FOURTH AND SECOND CONDUITS.