THE CHALLENGE
A customer in Norway needed a centralizer package suited for a specific close tolerance operation in a deepwater well with a total depth of 9,778 TVD RKB ft and 16,614 MD RKB ft.
The desired solution had to provide a reduced insertion force and low running force, tested and proven in the restriction; along with suitable standoff and a high axial stop collar load capacity - all at a low cost to meet close tolerance capabilities. For this specific well the customer needed to run a 17" liner through a wear bushing restriction with an ID of 17.75" to 3,295 ft TVD. The high cost centralizer sub would be the traditional close tolerance application for this type of well.
THE SOLUTION
To meet the challenge Centek, Halliburton recommended the Centek UROS-CT centralizer.
The UROS-CT close tolerance centralizer is specifically designed for use in tight annulus applications where narrow margins between pore pressure and the fracture gradient exist. In deepwater operations the UROS-CT can compress virtually flat to allow travel through a series of tight casing strings but is still capable of expanding to the designed open-hole size.
THE RESULT
By using the Centek UROS-CT centralizer met all of the requirements from the customer were met and the 17" liner safely passed through the tight restriction without issue.
