Method of removing pipe

Claim 1

A METHOD OF REMOVING A PIPE EMBEDDED IN A MASONRY WALL WHICH COMPRISES THE STEPS OF: (A) CONTACTING SAID WALL WITH SAID PIPE EMBEDDED THEREIN, AT THE POINT AT WHICH SAID PIPE IS EMBEDDED IN SAID WALL, WITH A ROTARY DRILL BIT HAVING AN AXIAL BORE AND A PLURALITY OF ELONGATED CUTTING TEETH WHICH EXTEND SUBSTANTIALLY ALONG THE INTERIOR AND EXTERIOR SURFACES OF SAID BIT AT THE LEADING END THEREOF AND WHICH ARE RIGIDLY ATTACHED TO SAID LEADING END OF SAID BIT, SAID CUTTING TEETH HAVING AN INTERIOR DIAMETER OF FROM 10 TO 20 MILS LESS THAN THE OUTSIDE DIAMETER OF SAID PIPE, AND AN OUTSIDE DIAMETER GREATER THAN THE OUTER DIAMETER OF SAID BIT AND AN INNER DIAMETER LESS THAN THE INNER DIAMETER OF SAID BIT, SAID CUTTING TEETH HAVING A PITCH OF 0 TO 8 DEGREES, SAID BIT BEING ATTACHED AT THE TRAILING END THEREOF TO A ROTARY TOOL; (B) MOVING SAID DRILL BIT COAXIALLY OF SAID PIPE SO AS THE AXIAL BORE OF SAID DRILL BIT FROM THE BREACH IN BIT USING SAID PIPE AS A GUIDE MEANS FOR GUIDING THE MOVEMENT OF SAID DRILL BIT INTO SAID WALL AND COAXIALLY OF SAID PIPE IN SUCH A MANNER AS TO REMOVE FROM 10 TO 20 MILS OF THE EXTERIOR SURFACE FROM SUCH PIPE DURING THE DRILLING OPERATION; AND (C) REMOVING SAID DRILL BIT WITH SAID PIPE CONTAINED IN THE AXIAL BORE OF SAID DRILL BIT FROM THE BREACH IN SAID WALL WHEN SAID DRILLING OPERATION HAS BEEN COMPLETED.

Claim 2

A METHOD OF REMOVING A PIPE EMBEDDED IN A MASONRY WALL WHICH COMPRISES THE STEPS OF: (A) CONTACTING SAID WALL WITH SAID PIPE EMBEDDED THEREIN, AT THE POINT AT WHICH SAID PIPE IS EMBEDDED IN SAID WALL, WITH A ROTARY DRILL BIT HAVING AN AXIAL BORE AND A PLURALITY OF ELONGATED CUTTING TEETH WHICH EXTEND SUBSTANTIALLY ALONG THE INTERIOR AND EXTERIOR SURFACES OF SAID BIT AT THE LEADING END THEREOF AND WHICH ARE RIGIDLY ATTACHED TO SAID LEADING END OF SAID BIT, SAID CUTTING TEETH HAVING AN INTERIOR DIAMETER OF FROM 10 TO 20 MILS LESS THAN THE OUTSIDE DIAMETER OF SAID PIPE, AND AN OUTSIDE DIAMETER GREATER THAN THE OUTER DIAMETER OF SAID BIT AND AN INNER DIAMETER LESS THAN THE INNER DIAMETER OF SAID BIT, SAID CUTTING TEETH HAVING A PITCH OF 0 TO 8 DEGREES, SAID BIT BEING ATTACHED AT THE TRAILING END THEREOF TO A ROTARY TOOL; (B) MOVING SAID DRILL BIT COAXIALLY OF SAID PIPE SO AS THE AXIAL BORE OF SAID DRILL BIT FROM THE BREACH IN BIT USING SAID PIPE AS A GUIDE MEANS FOR GUIDING THE MOVEMENT OF SAID DRILL BIT INTO SAID WALL AND COAXIALLY OF SAID PIPE IN SUCH A MANNER AS TO REMOVE FROM 10 TO 20 MILS OF THE EXTERIOR SURFACE FROM SUCH PIPE DURING THE DRILLING OPERATION; AND (C) REMOVING SAID DRILL BIT WITH SAID PIPE CONTAINED IN THE AXIAL BORE OF SAID DRILL BIT FROM THE BREACH IN SAID WALL WHEN SAID DRILLING OPERATION HAS BEEN COMPLETED.