APPARATUS FOR USE IN CONTROLLING FLOW THROUGH A TUBING STRING SUSPENDED AND PACKED OFF WITHIN WELL BORE AS WELL AS WITHIN THE ANNULUS BETWEEN THE TUBING STRING AND WELL BORE ABOVE AND BELOW THE PACKER

摘要

There is disclosed apparatus for use in controlling flow through a tubing string suspended and packed off within a well bore and within the annulus between the string and well bore above and below the packer by tools adapted to be lowered into and raised from landed positions within a pocket to one side of a bore through a mandrel connected as part of the tubing string for releasing the packer to be set and opening a bypass therein and for opening and closing a flapper in the bore, as well as the bypass responsive to the supply of control fluid from a remote source to the pocket.