THE CHALLENGE
Cairn Energy needed to run a 291 ft liner incorporating an inline liner hanger and 11-3/4 in., 65 ppf P110 Wedge 513 casing.
The liner had to pass inside 13-3/8 in., 72 ppf P110 VAM TOP casing with an internal diameter of 12.347 in. and a 12.25 in. drift. The restricted clearance required a slim centralizer capable of passing through the casing while maintaining effective standoff.
THE SOLUTION
Ten 11-3/4 in. x 14-3/4 in. Centek UROS-CT close-tolerance centralizers were installed on the liner.
The UROS-CT is engineered to precise tolerances for restricted offshore applications. Its low-profile design provides effective flow-by, helping to manage surge and equivalent circulating density while retaining the restoring force needed to support casing centralization.
THE RESULT
All ten UROS-CT centralizers successfully passed through the restricted casing without incident. The liner was run and cemented as planned, demonstrating the UROS-CT’s suitability for demanding close-tolerance offshore applications.
