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- Title
Handling free gas in deep and ultra-deep water drilling risers: a technical review and safety case explanation.
- Authors
Potter, Paul A.
- Abstract
The Macondo well blowout, also referred to as the Deepwater Horizon Disaster, changed the safety case towards the capable and safe handling of the free gas present in ultra-deep water riser strings. This paper is a technical review that discusses the fundamental physical phenomena of free gas contained in drilling fluids, its behaviour under the conditions present in ultra-deep water drilling risers, and its migration to the surface. The technical advances of post-Macondo riser gas handling (RGH) systems are presented and the safety criticality of such systems as an integral component of the safety case for deep water drilling installations is also explained. Finally, a parallel architecture aspect of a RGH system when installed, and operated in conjunction with a closed managed pressure drilling system is described.
- Subjects
UNDERWATER drilling; GAS well blowouts; DEEPWATER Horizon (Drilling rig); OCEAN engineering; RISERS (Founding)
- Publication
Underwater Technology, 2017, Vol 34, Issue 3, p115
- ISSN
1756-0543
- Publication type
Article
- DOI
10.3723/ut.34.115