Control valve engineering specialist, Severn Glocon Group has strengthened its presence in the subsea oil and gas market with the acquisition of HPHT downhole tools company Calidus Engineering. Now renamed Severn Subsea Technologies Ltd, the company will provide research, development and test facilities to enhance Severn Glocon’s subsea valves capability. A former subsidiary of Badger Explorer (Norway), Calidus is a multi-discipline engineering firm developing innovative subsea and downhole technologies for harsh HPHT environments.