Transocean's jackup rig ‘GSF Rig 127' has set a world record for the longest extended-reach well ever drilled, at 12,289 metres MD (measured depth), with a 10,902-metre horizontal section at Houston in USA.
The well was drilled offshore Qatar in 36 days. The new record of 12.2km is also the first well in the history of offshore drilling that exceeds 12,191 metres. The well surpasses by approximately 609 metres, the prior extended-reach record of 11,680 metres MD set by another drilling contractor with a land rig drilling at Sakhalin Island earlier this year. The rig's crewmembers, working with the client, Maersk Oil Qatar, overcame many constraints, including high drilling torque throughout certain parts of the horizontal section. The Well BD-04A is in the Al-Shaheen field offshore Qatar. In addition to staying focused on safe operations, crew used extensive deck-management planning and a supply boat to hold additional drill pipe so that the rig could stay within its variable deck load rating. Transocean is the world's largest offshore drilling contractor and provider of drilling management services worldwide. The company has a fleet of 138 mobile offshore drilling units plus nine announced ultra-deepwater newbuild units.
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