SS-20® and SS-15® BigBore™ II-H Subsea Wellhead System Brochure

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The BigBore II-H Subsea Wellhead System allows an additional 18″ casing string, hanger and seal assembly to pass through the 18-3/4″ wellhead with the BOP stack and riser in place. This accommodates drilling and running a large bore diameter casing string through shallow pressurized water sands with complete BOP control and with drilling returns back to the drilling vessel.







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