Retrieveable Pack-off Bushing OM-RPOB

The Seal Joint is used in combination with the retrievable Pack off Bushing (RPOB). This combination is used to provide a seal between the liner and setting tool during cementing operations. The Seal Joint stinger is stabbed into the bushing inner V-Ring Seal Pack Off Assembly and the bushing OD is sealed and located in the RPOB profile with in the setting collar or Liner Top Packer to provide a high integrity seal. This method significantly reduces the upward hydraulic force on the drill pipe during cementing when compared to the casing packer cup method to provide this seal. This especially beneficial when cementing larger diameter liners, and /or cementing at relatively shallow depths where this upward force might exceed the drill pipe string weight and hydraulic up the hole and possibly losing the seal between the liner and the setting tool and running the cement job. After the cement job, The Slick Joint and RPB are pulled out of the liner top with no drill out required