Apparatus for flowing oil from a well

Claim 1

IN AN APPARATUS FOR FLOWING OIL FROM A WELL, A WELL CASING HAVING ONE END OPEN AND THE OTHER END CLOSED ADAPTED TO BE DISPOSED IN AN UPRIGHT POSITION IN A WELL FROM WHICH OIL IS TO BE EXTRACTED WITH THE OPEN END EXTENDING INTO THE WELL AND WITH THE CLOSED END SPACED ABOVE THE WELL, AN OUTER PIPE EXTENDING LONGITUDINALLY THROUGH SAID CASING AND HAVING THE UPPER END PORTION PROJECTING THROUGH AND EXTERIORLY OF THE CLOSED END OF SAID CASING AND HAVING THE LOWER END INWARDLY OF AND SPACED FROM THE OPEN END OF SAID CASING, A MAIN VALVE NORMALLY CLOSING THE LOWER END OF SAID PIPE AND OPERABLE TO OPEN POSITION UPON IMPACT OF FLUID THERAGAINST, A FIRST PLUG PROVIDED WITH AN AXIAL BORE AND HAVING DIVERGING PASSAGES PROJECTING FROM ONE END OF SAID BORE DISPOSED IN SAID PIPE BELOW AND SPACED FROM THE CLOSED END OF SAID CASING SO THAT THE BORE EXTENDS LONGITUDINALLY OF SAID PIPE WITH THE PASSAGES FACING TOWARD THE LOWER END OF SAID PIPE, SAID UPPER END PORTION OF SAID OUTER PIPE BEING PROVIDED WITH AN OUTLET, A FIRST INNER PIPE SPACED FROM AND EXTENDING LONGITUDINALLY THROUGH THE UPPER END PORTION OF SAID OUTER PIPE AND INTO THE PART OF SAID OUTER PIPE BELOW THE CLOSED END OF SAID CASING AND HAVING THE UPPER END PORTION PROJECTING ABOVE THE UPPER END PORTION OF SAID OUTER PIPE AND HAVING THE LOWER END EXTENDING INTO THE BORE OF SAID PLUG AND CONNECTED IN COMMUNICATION WITH SAID ONE END OF SAID BORE, A CONDUIT ABOVE SAID INNER PIPE FOR CONTAINING FLUID UNDER PRESSURE, THE UPPER END OF SAID FIRST INNER PIPE BEING CONNECTED IN COMMUNICATION WITH THE INTERIOR OF SAID CONDUIT, A SECOND INNER PIPE POSITIONED WITHIN AND SPACED FROM SAID OUTER PIPE BELOW AID PLUG AND EXTENDING LONGITUDINALLY OF SAID OUTER PIPE AND HAVING THE UPPER END DETACHABLY ATTACHED TO THE LOWER END OF SAID PLUG BETWEEN THE DIVERGING PASSAGES OF SAID PLUG AND HAVING THE LOWER END PORTION ADJACENT AND INWARDLY OF SAID MAIN VALVE, A SECOND PLUG PROVIDED WITH AN AXIAL BORE, SAID BORE HAVING A FIRST VALVE SEAT ADJACENT ONE END THEREOF AND A SECOND VALVE SEAT ADJACENT THE OTHER END THEREOF, A SUBSIDIARY VALVE NORMALLY SEATING UPON SAID FIRST VALVE SEAT ENCLOSING SAID ONE END OF THE BORE AND OPERABLE TO OPEN POSITION UPON IMPACT OF FLUID THEREAGAINST TO THEREBY SEAT UPON SAID SECOND VALVE SEAT AND CLOSE THE OTHER