Higher strength grades give the possibility to reduce the weight of existing designs, which reduces the amount of energy needed to produce the part. This, in combination with the ongoing transition to carbon-free steelmaking, gives steel a huge potential to be the material for a sustainable future.
The oil and gas industry has been one of the main drivers to the development and use of advanced steel products and has forced the steel industry and product suppliers as Subseatec to challenge
what is considered possible.
Recent developments in the ultra-high pressure and high temperature (HPHT) field is one example.
In this area, Subseatec has been challenged by Oil companies and OEMs to develop products with strength, toughness, and corrosion resistance to withstand the extreme environments HPHT dictates. As a result, Subseatec has today the knowledge and experience to deliver SCR riser joints for HPHT environments. A 20,000psi system with a 5 1/8in bore size was developed and delivered to one of our major clients.
The workover system consisted of Upper and Lower Stress Joints, Tension and Intermediate Stress Joints, an SFT Adapter and a Hang off Bushing, as well as required Test caps. All the critical components, e.g., the 18m-long Upper-Stress Joint, were fully ID cladded with Alloy 625. The Hang off Bushing was qualified by a 1000-ton load test at our partner’s test centre. Subseatec delivered the 20K rated joints to its client during 2021. We are all facing a big transition in our industry towards more sustainable solutions, and Subseatec, with our DNA in the steel and energy industry, sees great opportunities in delivering engineering solutions where the steel can be utilized to higher and higher degrees.