초록 ▼

A well packer adapted to be set in a well conduit and includes a mandrel, a packing seal surrounding the mandrel and slips positioned above the packing seal against an abutment. The abutment is connected to a latching head and to the mandrel. A connection is positioned adjacent the lower end of the

A well packer adapted to be set in a well conduit and includes a mandrel, a packing seal surrounding the mandrel and slips positioned above the packing seal against an abutment. The abutment is connected to a latching head and to the mandrel. A connection is positioned adjacent the lower end of the latching head which can be broken for releasing the latching head and preferably the abutment from the mandrel for allowing the milling out of the packer without the necessity of milling the latching head. The packer is released by an upward jar on the latching head for retrieving the latching head in some embodiments and by chemical cutting in another embodiment. The packer slips are then milled out for releasing the packer for upward movement.

대표청구항 ▼

A well packer adapted to be set in a well conduit comprising, a mandrel, packer sealing means surrounding the mandrel, slip means surrounding the mandrel, means supported from the mandrel for expanding the packer sealing means and the slip means, a latching head connected to the mandrel, an abutment

A well packer adapted to be set in a well conduit comprising, a mandrel, packer sealing means surrounding the mandrel, slip means surrounding the mandrel, means supported from the mandrel for expanding the packer sealing means and the slip means, a latching head connected to the mandrel, an abutment connected to the latching head and positioned above and engaging the slip means, breakable means adjacent the lower end of the head for releasing the head from the mandrel for allowing the milling out of the packer without the necessity of milling the latching head. The method of retrieving a normally nonretrievable well packer out of a set position in a well conduit in which the well packer includes a head connected to a mandrel and slip means on the mandrel comprising, providing a breakable connection in the packer adjacent the lower end of the head, breaking the breakable connection for disconnecting the head from the mandrel, removing the head from the well conduit, milling out the slip means for releasing the packer for upward movement from the well conduit, and removing the milled packer from the well conduit.