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Claim 1

IN A WELL TOOL: A TUBULAR HOUSING MEMBER; A TUBULAR BODY MEMBER TELESCOPICALLY RECEIVED IN SAID HOUSING MEMEBER, SAID MEMBERS BEING ADAPTED FOR CONNECTED IN A STRING OF PIPE AND MOVABLE IN RELATION TO ONE ANOTHER BETWEEN EXPANDED AND CONTRACTED POSITION; A VALVE BODY HAVING AN ANNULAR VALVE SEAT AND SLIDABLY MOUNTED IN SAID HOUSING MEMBER ADJACENT TO SAID BODY MEMBER; A VALVE MEMBER PIVOTALLY MOUNTED ON ONE SIDE OF SAID VALVE BODY AND NORMALLY SEATED ON SAID VALVE SEAT; FIRST MEANS ADAPTED FOR PASSAGE THROUGH SAID VALVE SEAT AND ENGAGEABLE WITH SAID VALVE MEMBER FOR SHIFTING SAID VALVE MEMBER AND VALVE BODY AS SAID TELESCOPED MEMBERS ARE MOVED TOWARD SAID CONTRACTED POSITION; NORMALLY-CLOSED BYPASS MEANS FOR PROVIDING FLUID COMMUNICATION ACROSS SAID VALVE SEAT WHEN SAID TELESCOPED MEMBERS ARE DISPLACED TO A LOCATION INTERMEDIATE OF SAID POSITIONS; AND SECOND MEANS STOPPING SAID VALVE BODY WHEN TELESCOPED MEMBERS ARE BETWEEN SAID LOCATION AND CONTRACTED POSITION SO SAID FIRST MEANS CAN PASS THROUGH SAID VALVE SEAT AND UNSEAT SAID VALVE MEMBER AS SAID TELESCOPED MEMBERS APPROACH SAID CONTRACTED POSITION.