Ugland Offshore, renamed from Ugland Oilfields Services in 1989, merged with Det Söndenfjelds-Norske in 1995 as DSND Ugland Offshore. It became DSND Offshore in 1997, DSND Subsea in 2000 and Siem Offshore in 2004. The group included the acquired Brazilian Norsul Offshore, renamed DSND Consub; Halliburton Subsea and DSND combined resources as Subsea 7 in 2002. Hays Ships is recorded as acquired by DSND in October 1969, and PGS Production later appears under Andreas Ugland & Sons.
Keep the explicit scope label independent; no alias or company identity is inferred.