High temperature well packer.

摘要

A well packer (20) for use in geothermal wells or steam injection wells. The packer (20) can be anchored to the inner wall of a casing string (25) to resist differential pressure in either direction. The anchoring means includes a single set of slip elements (50) which are hyrdaulically or mechanically set. The packer (20) includes a sealing unit (30) with packing elements (36) and (37) especially adapted for high temperature wells. The packer (20) can be simply released from the casing by upward tension on the tubing (21).