As part of a range of subsea well decommissioning activities, TSMarine has recently completed a multi-client well programme for BP, Perenco and Tullow Oil to abandon four Category One suspended wells in the southern and central North Sea.

TSMarine offers a range of rigless well intervention, decommissioning and construction support solutions to the global subsea oil and gas industry.

Chartering the Island Constructor vessel, the Aberdeen-based subsea services contractor led a 12 day project to carry out preliminary work on the wells that included debris cap removal, well bore drifting, plugging of circulation vent holes, marine growth removal and fishing net debris removal where required.

TSMarine cut casing and recovered the wellheads using Norse Cutting and Abandonment’s (NCA) abrasive water jet cutting services, which eliminated the need to use explosives and removed any risk to marine cetaceans.

Each well was recovered in a single operation. Once recovery rigging was installed, NCA’s specially developed tooling was deployed into the well, the cut was completed and ultimately each well was recovered in a single operation.

TSMarine has carried out a number of multi-client well decommissioning campaigns whereby clients can share mobilisation and transit costs while TSMarine’s manage the entire project scope including well reviews, permits, HIRA, emergency response planning and all offshore operations.