SAKHALIN RMR-Conclusion: Riserless mud-recovery system used in Sakhalin wells

In 2006, Russia’s CJSC Elvary Neftegaz, a joint venture between OAO Rosneft and BP Exploration Operating Co. Ltd., drilled the top hole sections of two wells off Sakhalin Island using a riserless mud-recovery system from a semisubmersible rig.Part 1 of this series, published Apr. 23, describes how the RMR system was designed and organized. This concluding part reviews the permitting process, operations, and lessons learned during the 2006 drilling season and presents future plans.Rig systems integrationAlthough the system does not have a large deck footprint, it was essential to identify a suitable location to avoid conflict with other deck-space intensive applications such as skip ...

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