Hydraulic set and straight pull release well packer

Claim 1

A well packer adapted to be set in a conduit disposed in a well bore comprising, a mandrel having a fluid port, initially retracted packing seal means surrounding said mandrel, initially retracted slip means surrounding said mandrel and positioned below said packing seal means, packer seal setting piston means surrounding the mandrel and exposed to the port for moving toward the packing seal means for expanding the packer seal in response to fluid pressure through the port and including a packer sleeve extending downardly, slip setting piston means surrounding the mandrel and exposed to the port for moving toward the slip means for expanding the slip means in response to fluid pressure through the port and including a slip sleeve extending downwardly coaxially with the packer sleeve, one-way clutch means connected between the packer sleeve and the slip sleeve allowing simultaneous movement of the packer piston upward and the slip piston downward for setting and holding the packer centrally in the conduit, a releasable sub including, an abutment member initially positioned against the top of the packing seal means, a housing telescopically surrounding the upper end of the mandrel and initially holding the abutment in engagement with the mandrel, a vertically extending spline and groove between the housing and the mandrel, an outer member releasably connected to the housing, a packer expander sleeve connected to the outer member, coacting shoulders between the housing and the outer member, coacting shoulders between the expander sleeve and the packer setting piston, and coacting shoulders between the packer setting piston and the slip setting piston whereby upward movement of the housing releases the set packer.