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Vallourec innovates to develop X80 for sour conditions

17/04/2020 - R&D

Vallourec aims to innovate constantly to meet its clients’ demands for tubular solutions for challenging oil & gas market projects. For the past two years, our teams in France, Germany and Brazil have pooled their expertise and resources to tackle a key challenge: the development of a high strength, corrosion-resistant X80 steel grade for application in deep water sour conditions. 
The One X80 project originally grew from a demand from one of Vallourec’s largest clients, as part of an extensive qualification program. The last few years have seen an increased focus on ultra-deep water fields on the one hand, and increased efficiency on the other. This has led oil and gas companies to demand cost-effective new solutions able to resist “sour” conditions – environments in which hydrogen sulfide (H2S) can lead to the pipeline failure.
Light

The high strength, low alloy X80 grade developed by Vallourec enables the use of lighter pipelines in ultra-deep waters, reducing consequently the installation costs.

Laurent Ladeuille R&D Manager

An international team to deliver a single X80 grade worldwide

Vallourec decided to bring together an international X80 product development team to ensure it met other key clients demands: a unique worldwide product.
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Florian Thebault

The whole idea behind the One X80 project was to ensure that clients get exactly similar mechanical and corrosion properties from a tube ordered from Brazil as well as a tube ordered from Germany.

Florian Thebault R&D Engineer
The project called upon the skills and know-how of several people from Vallourec Research Centers and Industrialization teams in France, Germany and Brazil as well as welding  engineers from Serimax, Vallourec’s dedicated welding solutions subsidiary. All countries were involved in product development, while the industrial prototypes were manufactured in Brazil.

“The X80 development started in Brazil with a local team, and after the creation of the One X80 project, the team was expanded and the governance was changed”, says Dr. Júlio Silva, M&D PLP General Manager in Brazil.
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Talent

The larger array of talents and skills is positive as they cannot be found in a single individual only. In addition, the team has supported and enhanced the skills and learning processes of each of its members, bringing out the best of them.

Ana Carolina Vilas Bôas Engineer

A highly technical product demanding specialist expertise

One reason for the large number of people on the project was its complexity. Florian cites one example:

“Sour service X80 is a premium product which presented a major development challenge: how to obtain high mechanical properties while preserving sulfide stress cracking resistance?”

Florian led corrosion testing from the research center in France calling on its experience and line pipe manufacturing expertise in Germany. “We acted as a single close-knit team drawing on the specialist expertise in each country.”

Another significant challenge has been weldability. Laurent Lamps, welding engineer at Serimax summarizes the issues:

“As you move up the grades, you add chemical elements that have a detrimental effect on weldability, a challenge raised by adjusting the welding parameters. We need to meet mechanical and non-destructive testing acceptance criteria, and once at the installation site, we need to be able to weld as quickly as possible. This is vital to keeping down costs for the client.”

An additional complication is that different welding solutions are required depending on pipe installation method. “We’ve already developed and tested a cost-effective welding solution for J-lay, and we’re continuing to work on the welding procedure for reel-lay.”

Teamwork between the Vallourec and Serimax teams has further strengthened both companies’ value proposition: “We are now able to offer clients comprehensive know-how both of tubes and how they are installed.”
 
x80-trial-wtc

Promising results and a lasting cultural impact

While additional industrial trials are necessary before X80 can be marketed, the project was presented at Rio Oil and Gas in 2018 and Rio Pipeline in 2019, and has received positive feedbacks from EPCIs and operators based on initial technical results as stated by Vicente Trindade. 
Strategic

It’s strategic for Vallourec to be well positioned in the frontline of the Oil & Gas market considering potential future demands. It will be relevant for some of the challenging upcoming projects in Brazilian pre-salt fields.

Livia Mangualde PLP Industrialization Manager
And for Vallourec and its employees, the advantages extend beyond the project itself:

“We’ve developed a great dynamic, which continues today,” says Florian. “This multi-country aspect is something which has really grown at Vallourec over the past 10 years. Thanks in part to the X80 project, it looks set to continue into the future.”