Pipe coupling with lug engaging rotatable collar

Claim 1

A DRILL STRING TOOL JOINT FOR USE WITH DRILLING APPARATUS AND FOR INTERCONNECTING IN END TO END RELATIONSHIP TWO ADJACENT LENGTHS OF DRILL PIPE HAVING EXTERIOR THREADS ADJACENT THEIR ENDS COMPRISING; A FEMALE SECTION HAVING INTERNAL THREADS AT ONE END FOR CONNECTION TO THE END OF A FIRST DRILL PIPE, A GENERALLY CYLINDRICAL EXTERIOR SURFACE EXTENDING TO THE OTHER END THEREOF, A PLURALITY OF SPACED LUGS EXTENDING OUTWARDLY FROM SAID EXTERIOR SURFACE, A PERIPHERAL, TRANSVERSE SHOULDER LONGITUDINALLY BELOW SAID LUGS, AND MEANS FOR RECEIVING A PORTION OF A MALE SECTION AT THE END OPPOSITE SAID THREADS; A MALE SECTION HAVING INTERNAL THREADS AT ONE END FOR CONNECTION TO THE END OF A SECOND DRILL PIPE, A PORTION SEATING IN THE RECEIVING MEANS OF SAID FEMALE SECTION, AN UPWARDLY FACING EXTERIOR PERIPHERAL SHOULDER BETWEEN AN UPPER RELATIVELY SMALL EXTERIOR DIAMETER PORTION AND A LOWER AND ADJACENT RELATIVELY LARGE EXTERIOR DIAMETER PORTION; A COUPLING SECTION HAVING AN UPPER PORTION HAVING AN INTERNAL DIAMETER SLIGHTLY GREATER THAN AND OF APPROXIMATELY THE SAME LONGITUDINAL EXTENT AS SAID UPPER PORTION OF SAID MALE SECTION, AN INTERMEDIATE PORTION HAVING AN INTERNAL DIAMETER SLIGHTLY GREATER THAN SAID LAST-MENTIONED PORTION OF SAID MALE SECTION, A LOWER PORTION HAVING AN INTERNAL DIAMETER SLIGHTLY GREATER THAN THE DIAMETER DEFINED BY THE EXTERNAL SURFACES OF SAID LUGS OF SAID FEMALE SECTION, AND SPACED LUGS FOR ENGAGEMENT WITH SAID LUGS OF SAID MALE SECTION EXTENDING INWARDLY FROM SAID LOWER PORTION, THE LONGITUDINAL DISTANCE BETWEEN THE UPPER EDGE OF SAID INTERMEDIATE PORTION AND THE LOWE EDGE OF THE LUGS OF SAID COUPLING SECTION BEING SUBSTANTIALLY THE SAME AS THE LONGITUDINAL DISTANCE BETWEEN SAID SHOULDER OF SAID FEMALE SECTION AND SAID SHOULDER OF SAID MALE SECTION; AND MEANS TO SEAL SAID TOOL JOINT SECTIONS.