Abstract
Typical structures of unbonded flexible pipes all revolve around a common sequence of layers.
By changing the typical sequence and placing a flat metallic spiral back-up pressure armor layer) under the interlocked pressure armor, it has been identified that this reduces the nub to nub contact travel distance on the interlocked pressure armor, allowing for higher normal operating pressure before the onset of fretting fatigue and the risk of failure of the reinforcements as a result.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Baker Hughes Company, "Spiral under interlocked armor in unbonded flexible pipe of the API 17J type", Technical Disclosure Commons, (April 30, 2025)
https://www.tdcommons.org/dpubs_series/8053
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