Two slip retrievable packer for extreme duty

A packer settable within a tubular structure, the packer comprising:

• a mandrel;
• first and second axially spaced apart slips disposed relative to the mandrel, the first and second slips being radially outwardly extendable into gripping engagement with the tubular structure when the packer is set therein, the first slip resisting a load applied to the mandrel in a first axial direction, and the second slip resisting another load applied to the mandrel in a second direction, opposite to the first direction;
• a seal element carried about the mandrel, the seal element being radially outwardly extendable into sealing engagement with the tubular structure when the packer is set therein, a pressure differential in the first axial direction applied to the seal element being resisted by the second slip.