초록 ▼

A packer apparatus for use in a subterranean well comprises an inner mandrel and means for applying tension to the inner mandrel to set radially expandable slips and packing elements. The mandrel can be releasably positioned in a first position to secure the slips and packing element in the retracte

A packer apparatus for use in a subterranean well comprises an inner mandrel and means for applying tension to the inner mandrel to set radially expandable slips and packing elements. The mandrel can be releasably positioned in a first position to secure the slips and packing element in the retracted position and can be shifted to a second position in which engagable lock segments secure the slips and packing element in expanded configuration. The packer can be released by rotational manipulation or by axial force. The packer apparatus can be used with rotationally manipulatable well tools positioned either above or below the packer apparatus.

대표청구항 ▼

In a packer apparatus for use in establishing sealing integrity between upper and lower zones in an annular area between an inner and outer conduit in a subterranean well, comprising: an inner mandrel attachable to the inner conduit; anchoring slip means engagable with the outer conduit for holding

In a packer apparatus for use in establishing sealing integrity between upper and lower zones in an annular area between an inner and outer conduit in a subterranean well, comprising: an inner mandrel attachable to the inner conduit; anchoring slip means engagable with the outer conduit for holding the packer in engagement with the outer conduit against oppositely directed forces; packing element means engagable with the outer conduit for sealing against fluid pressure acting thereon in the upper and lower zones; shearable means for retaining the anchoring slip means and packing element means in engagement with the outer conduit, the shearable means being sheared by application of a force to the inner mandrel for releasing the anchoring slip means and the packing element means from engagement with the outer conduit; the improvement comprising; means for supporting forces acting on the packer due to the pressure of fluid in the upper zone without subjecting the shearable means to forces due to the pressure of fluid in the upper zone.