Riserless Field Abandonment Case Study

Abandonment of Argyll Field in the UK Sector of North Sea using multipurpose dive support vessel ‘Seawell’

In peak winter of 1993, HOC successfully executed permanent abandonment of 18 subsea wells in 260ft. water depth using an innovative approach to well abandonment.

The methodology involved squeezing the productive perforations through tubing, cementing the completion in place & removing the Christmas tree/wellhead using a DP DSV ‘Seawell’.

Few key elements to the success of this incident free project were detailed project planning/preparation, integrated services with consistent crew, batch operation and onboard availability of contingencies.

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