Three Acteon companies are working closely together to deliver the world's first ultra-high-pressure, large-bore drilling riser.
Venture Production, one of the UK’s newer oil and gas operators, is planning a high-pressure, high-temperature (HPHT) drilling campaign in the North Sea that looks set to break the industry mould. The company aims to use a jackup rig equipped with a surface blowout preventer (BOP) to drill a series of subsea wells across its central North Sea assets.
The surface BOP will provide cost and operational advantages. However, in order to complete the wells at the seabed, Venture will need a drilling riser that offers full-bore (18¾-in.) access and can withstand the full pressure of the reservoir, possibly in excess of 12,000 psi. The problem is that risers of this kind have simply not been available, at least until now.
Claxton Engineering, 2H Offshore and Subsea Riser Products have worked closely together to design a unique riser for the campaign. The riser is notable for its flange connections, which will be shrink fitted onto the individual pipes.