Multinational Energy Company Equinor experienced damage to the 18-5/8 in. casing at approximately 740m (2,428 ft.) MD in a well on the Oseberg B field in the North Sea. The client required a repair solution that would cover the damaged section while providing post-expanded drift ID of at least 16 in. to allow for a conventional 16 in. drilling BHA needed to drill the next section of the well.

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PERFORMANCE
16 in. ESeal™ Liner Restores Wellbore
Integrity
Challenge
Multinational Energy Company Equinor experienced damage to the 18-5/8 in. casing at
approximately 740m (2,428 ft.) MD in a well on the Oseberg B field in the North Sea. The client
required a repair solution that would cover the damaged section while providing post-expanded drift
ID of at least 16 in. to allow for a conventional 16 in. drilling BHA needed to drill the next section of
the well.
Solution
A 16 x 18-5/8 in. Solid Expandable ESeal Liner was the only
solution that would allow Equinor to continue drilling with the
required ID. Prior to running the ESeal Liner, the client
installed a whipstock below the problem area and milled a
17.5 in. window. The 67m (220 ft.) long 16 in. ESeal
Expandable Liner system was then successfully deployed,
installed at setting depth and tested to 70 bar, all as per plan.
The post-expanded drift ID of 16.125 in. meant that a
conventional 16 in. drilling BHA could be used to drill the next
section, and also provided adequate space to run a 14 in.
casing through.
This marks the first installation of a 16 in. ESeal Liner
worldwide.
► Completion Date: November 2018
► Location: Norway
► Basin: Offshore
► Well Type: Development
► Base Casing: 18-5/8 in. (87.5 lb/ft.)
► Solution: 16 in. 84lb/ft ESeal Liner
► Depth: 697 m. to 764 m. (2,287 ft. to
2,507 ft.)
► Liner Length: 67 m. (220 ft.)
Case Study