03 Mar Equinor completes investigation of well control incident
(Oilandgaspress) -Equinor has completed the investigation of a well control incident on the “Deepsea Bollsta” drilling rig on 23 September 2025. The incident is classified in the company’s highest category of severity.
The incident occurred in connection with plugging a well on the Troll field, while cutting a 13-3/8″ casing at a depth of about 510 metres. A leak of gas and fluid spread to the drill floor and the shaker room , where rocks and cuttings are removed from the drilling fluid before the fluid is returned to the well.
One person had trouble evacuating from the room due to the differential pressure that occurred. This person suffered minor injuries and received first aid treatment aboard after using force to get out. The gas and fluid column from the leak also damaged the ventilation system in the ceiling of the room.
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