Detnor Achieves Wellhead Milestone at Trolla


Trolla Wellhead Casing
(Click to Enlarge)

As a first on the Norwegian continental shelf, a wellhead was cut and removed from a vessel instead of a rig at the Trolla prospect. In addition to being first out on the Norwegian shelf with this solution, Det norske has set a world record at 270 meters of water depth.

The previous record for this technology was at 141 meters. After trouble freeing the 9 5/8" casing, the well was abandoned October 3rd, after it was secured in accordance with the PSA regulations.

Norse Cutting & Abandonment Norway AS (NCA) was contacted to plan for cutting and retrieving the wellhead to a vessel. NCA's equipment was installed on the anchor handling vessel Olympic Zeus in Stavanger on November 17-18, and demobilized the same place on November 23rd after a highly successful cutting- and lifting job.

The entire operation was conducted without any HSE remarks.
 

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