Patent ID: 7069987

Claim:
A casing adapter tool for connecting and sealing to a casing pipe at its lower end and to production or service equipment at its upper end, and for use with a well servicing equipment, comprising: a generally tubular casing adapter body having an upper end and a lower end, said casing adapter body being formed with a central bore extending therethrough, the central bore providing a profile which forms a casing seal chamber at the lower end, a barrier seal chamber located thereabove, and a fracturing seal chamber above or below the barrier seal chamber; lower connectors at the lower end of the casing adapter body for connecting and sealing to the casing pipe; top connectors at the upper end of the casing adapter body for connecting and sealing to production or service equipment; the barrier seal chamber: having a profile to accommodate and seal to a first removable pressure barrier on removal of any well servicing equipment, and sized to provide full bore access to the casing pipe; the first removable pressure barrier being a threaded, latched or snap ring type check valve or plug; and said fracturing seal chamber having a profile to permit a fracturing isolation tool to be run in and sealed against the central bore.