Hydraulically-actuated well packers

Claim 1

A WELL PACKER ADAPTED TO BE LOWERED AND SET WITHIN A WELL PIPE, INCLUDING, AN ELASTIC PACKING ELEMENT, AN UPPER ABUTMENT ABOVE SAID PAKING ELEMENT, A LOWER ABUTMENT BELOW SAID PACKING ELEMENT, THE PACKING ELEMENT AND UPPER AND LOWER ABUTMENTS EACH HAVING A PAIR OF PARALLEL OPENINGS WHICH ARE LONGITUDINALLY ALIGNED TO FORM A PAIR OF LONGITUDINAL PARALLEL PASSAGES EXTENDING THROUGH THE PACKER STRUCTURE, A FIRST TUBULAR SUPPORT EXTENDING THROUGH ONE OF SAID PASSAGES AND SECURED TO THE UPPER ABUTMENT, MEANS RELEASABLY CONNECTING THE TUBULAR SUPPOR TO THE LOWER ABUTMENT, A SECOND TUBULAR SUPPORT DISPOSED WITHIN THE OTHER OF SAID PASSAGES AND SECURED TO THE LOWER ABUTMENT, SAID SECOND SUPPORT BEING SLIDEABLE WITHIN THE OPENING IN THE UPPER ABUTMENT, PIPE-ANCHORING MEANS MOUNTED ON THE SUPPORTS BELOW THE PACKING ELEMENT, HYDRAULICALLYACTUATED MEANS MOUNTED ON THE SUPPORTS BELOW THE PIPEANCHORING MEANS AND ABOVE THE LOWER ABUTMENT FOR SETTING SAID ANCHORING MEANS AND THEREAFTER DEFORMING THE PACKING ELEMENT INTO SEALING POSITION, AND LOCKING MEANS ENGAGEABLE WITH SAID SECOND SUPPORT FOR LOCKING THE ANCHORING MEANS AGAINST MOVEMENT IN A DIRECTION WHICH WOULD UNSET SAID ANCHORING MEANS TO THEREBY LOCK THE ANCHORING MEANS AND PACKING ELEMENT IN ITS SET POSITION.