Safety joint device

Claim 1

A SAFETY JOINT DEVICE INCLUDING, A FIRST SECTION HAVING BOTH RIGHT-HAND AND LEFT-HAND THREADS FORMED THEREON, A SECOND SECTION HAVING LEFT-HAND THREADS FOR CONNECTION WITH THE LEFT-HAND THREADS OF SAID FIRST SECTION, SAID SECTIONS BEING DISCONNECTED BY A ROTATION OF THE SECOND SECTION IN A DIRECTION TO THE RIGHT, A THIRD SECTION HAVING RIGHTHAND THREADS FORMED THEREON FOR CONNECTION WITH THE RIGHT-HAND THREADS OF THE FIRST SECTION AFTER THE SECOND SECTION HAS BEEN DISCONNECTED AND REMOVED FROM SAID FIRST SECTION, AND AN ANNULAR NON-FLEXIBLE ELEMENT MOUNTED WITHIN SAID THIRD SECTION AND ENGAGEABLE BY THE FIRST SECTION AFTER THE FIRST AND THIRD SECTIONS ARE CONNECTED TOGETHER AND HAVING MEANS COACTING WITH SAID FIRST AND THIRD SECTIONS TO LIMIT THE TIGHTNESS TO WHICH THE CONNECTION BETWEEN THE THIRD SECTION AND THE FIRST SECTION MAY BE MADE UP, WHEREBY SUBSEQUENT SEPARATION OF THE SECTIONS IS FACILITATED.

Claim 3

THE METHOD OF REMOVING MULTIPLE PACKERS WHICH ARE MOUNTED ON A SINGLE WELL TUBING STRING FROM A WELL BORE INCLUDING, SEPARATING THE WELL TUBING STRING AT A POINT BELOW THE UPPERMOST PACKER BY IMPARTING A RIGHTHAND ROTATION TO THE WELL TUBING STRING, REMOVING THE UPPERMOST WELL PACKER TOGETHER WITH THAT PORTION OF THE WELL TUBING STRING ABOVE THE POINT OF SEPARATION FROM THE WELL BORE, THEREAFTER LOWERING A RETRIEVING PIPE WITHIN THE WELL BORE AND RECONNECTING SAID RETRIEVING PIPE BY IMPARTING A RIGHT HAND ROTATION TO THAT PORTION OF THE WELL TUBING STRING REMAINING WITHIN THE BORE, AND THEREAFTER REMOVING SAID TUBING STRING AND THE WELL PACKER OR PACKERS THEREON BY MEANS OF THE RETRIEVING PIPE.

Claim 4

THE METHOD OF REMOVING MULTIPLE PACKERS WHICH ARE MOUNTED ON A SINGLE WELL TUBING STRING FROM A WELL BORE INCLUDING, SEPARATING THE WELL TUBING STRING AT A POINT BELOW THE UPPERMOST PACKER BY IMPARTING A RIGHTHAND ROTATION TO THE WELL TUBING STRING, REMOVING THE UPPERMOST WELL PACKER TOGETHER WITH THAT PORTION OF THE WELL TUBING STRING ABOVE THE POINT OF SEPARATION FROM THE WELL BORE, THEREAFTER LOWERING A RETRIEVING PIPE WITHIN THE WELL BORE AND RECONNECTING SAID RETRIEVING PIPE BY IMPARTING A RIGHT HAND ROTATION TO THAT PORTION OF THE WELL TUBING STRING REMAINING WITHIN THE BORE, AND THEREAFTER REMOVING SAID TUBING STRING AND THE WELL PACKER OR PACKERS THEREON BY MEANS OF THE RETRIEVING PIPE.