Sealed slip joint coupling

Claim 1

A SEALED SLIP JOINT COUPLING FOR COUPLING ADJACENT END PORTIONS OF A FIRST AND A SECOND TUBULAR SECTION WHEREIN THE END PORTION OF SAID SECOND TUBULAR SECTION TELESCOPES WITHIN THE END PORTION OF SAID FIRST TUBULAR SECTION COMPRISING: AN ANNULAR SLIP CAGE HAVING A FIRST END PORTION AND A SECOND END PORTION, SAID FIRST END PORTION PROVIDED WITH INTERNAL THREADS FOR CONNECTION TO CORRESPONDING EXTERNAL THREADS ON THE END PORTION OF SAID FIRST TUBULAR SECTION AND SAID SECOND END PORTION PROVIDED WITH A SUBSTANTIALLY FRUSTOCONICAL INTERNAL CONFIGURATION, THE DIAMETER OF SAID CONFIGURATION DECREASING IN A DIRECTION AWAY FROM SAID FIRST END PORTION AND TERMINATING IN AN INWARDLY DIRECTED ANNULAR FLANGE; A PLURALITY OF SELF ALIGNING EXPANSIBLE ANNULAR SLIP SECTIONS POSITIONED WITHIN SAID SECOND END PORTION OF SAID SLIP CAGE, AND SAID SLIP SECTIONS WHEN ASSEMBLED HAVING AN INTERNAL CONFIGURATION CORRESPONDING TO SAID INTERNAL CONFIGURATION OF SAID SECOND END PORTION OF SAID SLIP CAGE, EACH OF SAID SLIP SECTIONS HAVING A PLURALITY OF RADIALLY INWARDLY DIRECTED TEETH, SAID SLIP SECTIONS BEING MOVABLE FROM A FIRST EXPANDED POSITION TO A SECOND RETRACTED POSITION IN GRIPPING CONTACT WITH THE EXTERIOR OF THE SECOND TUBULAR SECTIN IN RESPONSE TO THREADED AXIAL ADVANCEMENT OF SAID SLIP CAGE UPON THE END PORTION OF SAID FIRST TUBULAR SECTION; AN AXIALLY EXTENDING METALLIC POSITIVE DRIVE MEMBER LOCATED BETWEEN THE END SURFACE OF SAID FIRST TUBULAR SECTION AND THE END SURFACE OF SAID SLIP SECTIONS ADJACENT SAID FIRST TUBULAR SECTION; A CIRCULAR RESILIENT SEALING ELEMENT POSITIONED BETWEEN THE OUTER SURFACE OF SAID POSITIVE DRIVE MEMBER AND THE ADJACENT INNER SURFACE OF SAID SLIP CAGE; AND A CIRCULAR RESILIENT SEALING ELEMENT POSITIONED BETWEEN THE INNER SURFACE OF SAID POSITIVE DRIVE MEMBER AND THE ADJACENT OUTER SURFACE OF THE END PORTION OF SAID SECOND TUBULAR SECTION.