Objectives/Scope: For thirty-five years, TechnipFMC has been providing high pressure and high temperature flexible pipes to the drilling industry. These unbonded flexible pipes rated up to 15k psi working pressure are used worldwide as part of the choke and kill system of onshore and offshore drilling facilities or units. Following recent high-pressure reserve discoveries and to enable future exploration of formations with anticipated higher pressures, the drilling industry has started upgrading drilling safety equipment like blowout preventers to higher pressure ratings. Unbonded flexible pipe technology is following this trend, striving to continue providing the industry with reliable high-pressure choke and kill flexible pipes. Methods, Procedures, Process: The information presented in this document is the outcome of a full-scale test campaign performed within company owned facilities or in collaboration with worldwide recognized test laboratories. Results, Observations, Conclusions: This paper will present the trials performed on the presently available 15k psi rated product and the results of the testing toward qualification of the first choke and kill unbonded flexible pipes with a 20k psi internal pressure rating. In addition to the high-pressure upgrade, progress was made in the fire performance domain by improving flexible pipe product knowledge with regard to the fire resistance. This has been achieved through a large fire test campaign performed over the years. The document will detail the tests performed, the procedures followed, and the understanding of the different failure modes observed. Novel/Additive Information: Major achievements in the development of high pressure choke and kill unbonded flexible pipe technology will be presented to the industry with a focus on qualification testing and fire performance.
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