Valhall DP fra norh sea platform guide 1985 s 688
Discovery of Hod and Valhall
Finding Hod and Valhall was more closely linked than one might suppose. Amoco had caught whiffs of both fields before Phillips Petroleum made the nearby Ekofisk discovery, but it made its breakthrough only came after the latter had begun production. And that was after something pretty close to espionage by Amoco.