Hydraulic drilling and casing setting tool

Claim 1

A TOOL FOR USE IN DRIVING AND SETTING A WELL CASING IN AN UNDERGROUND FORMATION BY HYDRAULIC JETTING ACTION COMPRISING A SUPPORTING HEAD PROVIDED WITH A SUSPENDING MEANS TO RECEIVE AND RELEASABLY ENGAGE THE AXIAL EXTREMITY OF A TUBULAR WELL CASING, AN ADDITIONAL SUSPENDING MEANS COAXIAL WITH SAID FIRST NAMED SUSPENDING MEANS FOR RECEIVING AND RELEASABLY ENGAGING THE EXTREMITY OF A WELL CASING OF SUBSTANTIALLY DIFFERENT DIAMETER FOR SUSPENDING SUCH CASINGS IN A VERTICAL AXIS, SAID HEAD HAVING THERETO IN COAXIAL RELATIONSHIP WITH BOTH SAID SUSPENDING MEANS A DRILL PIPE SUB ADAPTED TO BE SUPPLED WITH FLUID AND ADAPTED TO BE SUSPENDED FROM A DRILLING DERRICK, PIPE COUPLING MEANS EXTENDING DOWNWARDLY FROM SAID HEAD AND BEING COAXIAL WITH AND OF SUBSTANTIALLY GREATER DIAMETER THAN SAID DRILL PIPE SUB AND DISPOSED BETWEEN BOTH SAID SUSPENDING MEANS AND SAID SUB FOR RECEIVING A JETTING PIPE, AND PASSAGEWAYS IN SAID HEAD FOR PERMITTING OUTFLOW OF JETTING FLUID THROUGH THE ANNULAR SPACE BETWEEN BOTH SAID SUSPENDING MEANS AND THE PIPE COUPLING MEANS.