Formation testing apparatus

Claim 1

A WELL TESTING APPARATUS ADAPTED TO PASS DOWN THROUGH A DRILL PIPE, COMPRISING AN ELONGATED PACKER SUPPORT BODY, A FIRST ELASTIC PACKING MEANS FIXED TO SAID SUPPORT BODY IN A MID PORTION THEREOF, MEANS FOR EXPANDING SAID PACKING MEANS TO FILL A PORTION OF THE ANNULUS BETWEEN SAID SUPPORT BODY AND THE DRILL PIPE, A SECOND INFLATABLE ELASTIC PACKER MOUNTED ON SAID SUPPORT BODY BELOW SAID FIRST PACKING MEANS, A SAMPLING PORT IN THE EXTERIOR OF SAID SUPPORT BODY BELOW SAID SECOND PACKER, A FIRST PASSAGEWAY FOR FLUID WITHIN SAID SUPPORT BODY COMMUNICATING BETWEEN SAID PORT AND THE INTERIOR OF SAID DRILL PIPE ABOVE SAID FIRST PACKING MEANS, SAID FIRST PASSAGEWAY PROVIDING A PATH FOR THE TRAVEL OF SAMPLE FLUID OBTAINED BELOW SAID SECOND PACKER, A SECOND PASSAGEWAY FOR FLUID WITHIN SAID SUPPORT BODY COMMUNICATING BETWEEN THE INTERIOR OF SAID INFLATABLE PACKER AND THE INTERIOR OF SAID DRILL PIPE ABOVE SAID FIRST PACKING MEANS, SAID SECOND PASSAGEWAY PROVIDING A PATH FOR THE TRAVEL OF FLUID FOR THE INFLATION OF SAID INFLATABLE PACKER, A FIRST VALVE POSITIONED IN SAID FIRST PASSAGEWAY OPERATIVE TO PERMIT FLUID FLOW FROM SAID SAMPLING PORT TO SAID DRILL PIPE WHILE OBSTRUCTING FLOW IN THE REVERSE DIRECTION, A SECOND VALVE POSITIONED IN SAID SECOND PASSAGEWAY, SAID SECOND VALVE HAVING TWO OPERATIVE POSITIONS, BEING OPERABLE IN THE FIRST OF SAID POSITONS TO PERMIT FLUID FLOW FROM THE INTERIOR OF SAID DRILL PIPE ABOVE SAID FIRST PACKING MEANS INTO SAID INFLATABLE PACKER AND TO OPPOSE FLUID FLOW IN THE OPPOSITE DIRECTION, AND BEING OPERABLE IN THE SECOND OF SAID POSITIONS TO PERMIT FLUID FLOW IN THE LATTER DIRECTION AND TO OPPOSE FLUID FLOW IN THE FORMER DIRECTION, AND MEANS FOR MOVING SAID SECOND VALVE FROM ONE OF SAID OPERATIVE POSITONS OT THE OTHER OPERATIVE POSITION.