1. THE METHOD OF FORMING A SPIRAL DRILL COLLAR FOR USE WITH A BIT HAVING SUBSTANTIALLY THE SAME OUTER DIAMETRAL DIMENSION COMPRISING (A) TWISTING A SQUARE HOLLOW MEMBER ABOUT ITS LONGITUDINAL AXIS; (B) FORMING THE ENDS OF THE RESULTING TWISTED MEMBER INTO CYLINDRICAL NECKS; (C) PROVIDING SAID CYLINDRICAL NECKS AT EACH OF THE ENDS OF SAID TWISTED MEMBER WITH SCREW THREADING; AND (D) ROUNDING THE ORIGINAL EDGES OF SAID SQUARE HOLLOW MEMBER TO PROVIDE SAID DRILL COLLAR WITH THE DESIRED DIAMETRAL DIMENSION.