Reamer with a rolling cutter for enlarging and straightening bore holes

Claim 1

IN COMBINATION WITH A STRING OF ROTARY DRILL PIPE HAVING A DRILL BIT AXIALLY CONNECTED ON THE LOWER END FOR DRILLING A BORE HOLE UPON ROTATION OF THE STRING OF DRILL PIPE, A REAMER FOR STRAIGHTENING THE BORE HOLE HAVING A CYLINDRICAL BODY SUBSTANTIALLY THE SAME DIAMETER AS THE DIAMETER OF THE DRILL PIPE, CONNECTIONS ON RESPECTIVE ENDS OF THE CYLINDRICAL BODY FOR CONNECTING SAID BODY OF THE REAMER COAXIALLY INTO THE STRING OF DRILL PIPE AT A POINT SPACED ABOVE THE DRILL BIT, A ROLLING CUTTER HAVING A DISK PORTION PROVIDED WITH PERIPHERAL TEETH HAVING INWARDLY EXTENDING CUTTING EDGES, AND MEANS FOR JOURNALING THE CUTTER ON ONE SIDE OF SAID BODY FOR ROTATION ON AN AXIS SUBSTANTIALLY TRANSVERSELY OF THE AXIS OF THE DRILL PIPE TO CAUSE THE CUTTING EDGES OF THE REAMER TO ROLL ALONG A PATH CIRCUMFERENTIALLY OF THE AXIS OF THE BORE HOLE MADE BY THE DRILL BIT BUT ON A CENTER INDEPENDENTLY OF SAID AXIS.