Retrievable plugs and packers for deep wells

Claim 1

A RETRIEVABLE BRIDGE PLUG ADAPTED TO BE SUPPORTED ON AN ELONGATED SUPPORT MEMBER FOR LONGITUDINAL AND ARCUATE MOVEMENT IN THE BORE HOLE OF A CASED WELL, WHICH BRIDGE PLUG COMPRISES: (A) AN INNER TUBULAR MEMBER ADAPTED TO BE CONNECTED TO SAID ELONGATED SUPPORT MEMBER FOR LONGITUDINAL AND ARCUATE MOVEMENT THEREWITH UPON LONGITUDINAL AND ARCUATE MOVEMENT OF SAID ELONGATED SUPPORT MEMBER, (B) A FIRST SLEEVE FITTED ON SAID SURROUNDING SAID INNER TUBULAR MEMBER FOR LIMITED SLIDING RELATION AND BEING ROTATABLE, WITHIN LIMITS, ON SAID INNER TUBULAR MEMBER, (1) SAID FIRST SLEEVE HAVING AN INVERTED J-SLOT FORMED THEREIN, (C) A SECOND SLEEVE FITTED ON AND SURROUNDING SAID FIRST SLEEVE FOR LIMITED LONGITUDINAL SLIDING MOVEMENT RELATIVE THERETO AND FOR RELATIVE ARCUATE MOVEMENT THEREWITH ABOUT THE AXIS OF SAID INNER TUBULAR MEMBER AND FOR RELATIVE INDEPENDENT LONGITUDINAL MOVEMENT WITH RESPECT TO SAID INNER TUBULAR MEMBER, (1) SAID SECOND SLEEVE HAVING AN INVERTED J-SLOT FORMED THEREIN WHICH IS COMPLEMENTARY TO SAID J-SLOT IN SAID FIRST SLEEVE, WHEN SAID SLEEVES ARE IN ONE POSITION, (2) SAID SECOND SLEEVE HAVING A LONGITUDINAL SLOT FORMED THEREIN, (D) A PIN FIXEDLY SECURED TO SAID FIRST SLEEVE AND EXTENDING INTO SAID LONGITUDINAL SLOT IN SAID SECOND SLEEVE TO LIMIT THE RELATIVE SLIDING MOVEMENT BETWEEN SAID FIRST AND THE SAID SECOND SLEEVES AND TO PERMIT RELATIVE ARCUATE MOVEMENT THEREBETWEEN, (E) FRICTION MEMBERS MOUNTED ON SAID SECOND SLEEVE EXTERIORLY THEREOF TO FRICTIONALLY ENGAGE THE INNER WALL OF THE CASING OF THE CASED WELL TO RETARD MOVEMENT OF SAID SECOND SLEEVE RELATIVE TO SAID FIRST SLEEVE WHEN SAID BRIDGE PLUG IS MOVED LONGITUDINALLY IN THE CASING OF THE CASED WELL, (F) A SLIP EXPANDER CONE MOUNTED ON AND SECURED TO THE UPPER END OF SAID FIRST SLEEVE AND HAVING A DOWNWARDLY AND INWARDLY TAPERED FACE THEREON, (G) RESILIENT ARMS MOUNTED ON SAID SECOND SLEEVE EXTERIOR THEREOF AND EXTENDING UPWARD THEREFROM, AND BEING SPACED AROUND THE PERIPHERY OF SAID SECOND SLEEVE, (H) A TOOTHED SLIP MEMBER MOUNTED ON THE UPPER END OF EACH SAID ARM AND HAVING AN INWARDLY AND DOWNWARDLY TAPERED SURFACE ON THE INNER FACE THEREOF TO COMPLEMENTALLY ENGAGE THE TAPERED SURFACE OF SAID SLIP EXPANDER CONE TO MOVE SAID SLIP MEMBERS, UPON RELATIVE MOVEMENT OF SAID TAPERED SLIP EXPANDER CONE WITH RESPECT TO SAID SLIP MEMBERS, (I) A PIN FIXEDLY SECURED TO SAID INNER TUBULAR MEMBER AND EXTENDING OUT THROUGH SAID INVERTED J-SLOT IN SAID FIRST SLEEVE AND INTO SAID INVERTED J-SLOT IN SAID SECOND SLEEVE TO PERMIT RELATIVE LONGITUDINAL SLIDING MOVEMENT BETWEEN SAID FIRST SLEEVE, MOUNTING SAID SLIP EXPANDER CONE, AND SAID SECOND SLEEVE, MOUNTING SAID TOOTHED SLIP MEMBERS THEREON, WHEN SAID PIN IS IN ONE POSITION RELATIVE TO SAID INVERTED J-SLOTS IN SAID FIRST AND SECOND SLEEVES, (1) SAID PIN, SECURED TO SAID INNER TUBULAR MEMBER AND EXTENDING THROUGH SAID INVERTED J-SLOTS IN SAID FIRST AND SECOND SLEEVES, BEING ADAPTED TO RETAIN SAID TOOTHED SLIP MEMBERS OUT OF ENGAGEMENT WITH THE INNER WALL OF THE CASING OF THE CASED WELL, WHEN SAID PIN IS IN ANOTHER POSITION IN SAID INVERTED J-SLOTS, (2) SAID INNER TUBULAR MEMBER AND SAID FIRST SLEEVE BEING ADAPTED TO MOVE DOWNWARD RELATIVE TO SAID SECOND SLEEVE, WHICH HAS SAID EXPANDER CONE THEREON, WHEN SAID FRICTION MEMBERS ARE IN ENGAGEMENT WITH THE INNER WALL OF THE CASING OF THE CASED WELL, SO SAID TAPERED SURFACES OF SAID SLIP MEMBERS WILL BE RETAINED AGAINST DOWNWARD MOVEMENT RELATIVE TO SAID SLIP EXPANDER CONE, SO SAID SLIP EXPANDER CONE WILL ENGAGE THE TAPERED FACE OF EACH SAID SLIP MEMBER TO URGE SAID SLIP MEMBERS OUTWARD INTO BINDING ENGAGEMENT WITH THE INNER WALL OF THE CASING OF SAID CASED WELL. (J) AN ANNULAR ELASTOMER PACKER ELEMENT SECURED TO SAID FIRST SLEEVE ABOVE SAID SLIP EXPANDER CONE AND BEING MOVABLE THEREWITH. (K) A DOWNWARDLY AND INWARDLY TAPERED PACKER EXPANDER CONE MOUNTED ON THE UPPER END OF SAID INNER TUBULAR MEMBER AND BEING MOVABLE THEREWITH TO ENGAGE SAID ELASTOMER PACKER ELEMENT WHEN SAID PACKER EXPANDER CONE IS IN ONE POSITION. (1) SAID PACKER EXPANDER CONE, MOUNTED ON SAID INNER TUBULAR MEMBER, BEING ADAPTED TO MOVE INTO ENGAGEMENT WITH SAID ELASTOMER PACKER ELEMENT, UPON DOWNWARD MOVEMENT OF SAID ELONGATED SUPPORT MEMBER, SO AS TO FORM A SEAL BETWEEN SAID INNER TUBULAR MEMBER AND THE INNER WALL OF THE CASING OF THE CASED WALL.