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TUR Centralizer Handles Tight ID and Expands Back to Gauge

Centek /6th April 2017/ TUR

In an offshore well in the Agbami Field, the operator needed to run 13 ⅝" casing through a restrictive 16" casing string, where the internal diameter dropped to just 14.823". The challenge was to pass this restriction without damaging the centralizers and then achieve full centralization in a much larger open-hole section (17 ½"). The solution: Centek TUR bow-spring centralizers — designed precisely for under-reamed/tight-tolerance runs. The TUR units compressed to pass the restriction over 9,250 ft, then expanded back to gauge in the open hole, returning to zero start and running forces. The result: the casing run was completed successfully, and rig time was cut by 3 days versus conventional centralizers that might have failed. The operator’s feedback confirms they plan to continue using TUR centralizers for deepwater Agbami wells.

This is a technology improvement/ innovation that will continue to be deployed for this application in deep water Agbami wells

Christian Rogerson, Drilling Operations Engineer, Chevron

THE CHALLENGE

This operator in the Agbami field needed centralizers that were able to pass through the restricted ID of the 16” casing and then expand to 17 1/2” in the next hole section to ensure proper centralization of the 13 5/8” casing string.

THE SOLUTION

13 5/8” Centek TUR centralizers were passed through a restriction of 14.823” in the 16” casing for 9,250ft and then reverted back to zero start and running forces in the 17 1/2” open hole.

THE RESULT

Running the Centek centralizers as the first option helped to save 3 days of rig time, compared to conventional centralizers which may have been unable to get to bottom, first time.

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Flexible with Low Start and Running Forces

The Centek TUR bow spring centralizer is engineered for use in close tolerance, under-reamed applications commonly found in some of the world’s most challenging offshore fields.

TUR Under-Ream Bow Spring Centralizer

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