Acteon's subsidiary 2H Offshore, a provider of offshore engineering solutions, has launched the second phase of
its measurement-based wellhead fatigue joint industry project (JIP), which aims to improve riser, wellhead, and
conductor fatigue estimates while making drilling operations more reliable and efficient.

2H highlights that seven “major” oil and gas operators have agreed to join the second phase of the JIP so far.
The company has also issued an invitation to other interested industry players to participate and in turn benefit
from the field data insights.

During the first phase of this project, 2H collaborated with nine operators to gather and analyse field
measurements from ten drilling campaigns in the Gulf of Mexico and the North Sea. The information
encompassed a range of environments, water depths, soil characteristics, riser and wellhead configurations, and
vessel types.

According to the company, the findings from the analysis verified that industry assumptions for wave and vortex-
induced vibration (VIV) fatigue assessments are conservative while the remaining fatigue life tends to be higher
than that determined by typical design methods. The firm believes that a more accurate prediction of remaining
fatigue life can eliminate the need for costly mitigation methods or unnecessary upgrades and downtime during
severe events.

Therefore, the field data analysed from the first phase will be used during the second phase to explain
uncertainties identified in the riser, wellhead, and conductor fatigue analysis. Based on 2H's statement, the
findings will further improve the accuracy of future wellhead fatigue assessments and provide an industry
consensus on design methodology.

Bulent Mercan, 2H Project Manager, commented: “Wellhead and conductor fatigue challenges have become
more prevalent in recent years due to the use of newer generation vessels with larger blowout preventers
(BOPs) and longer drilling operations being conducted in more harsh environments. The first phase of the
measurement-based wellhead fatigue JIP proved to be a great industry collaboration to solve this problem
through sharing resources.

“A reliable set of analytical parameters leveraging diverse field measurements will lead to improved accuracy and
more efficient drilling operations. There are a lot of learnings from the field measurements. We plan to further
utilise the datasets to address some uncertainties in the analysis. The findings will be used in the near term to
increase the accuracy of wave and VIV fatigue assessments and will eventually inform a revision of industry riser
design codes.”