Smedvig ASA, ("Smedvig"), (OSE: SME, NYSE: SMVA) was a Norwegian offshore oil rig company headquartered in Stavanger until it was acquired (January 2006) by rig newcomer SeaDrill of tanker mogul John Fredriksen.

At time of the merger Smedvig operated two semi submersibles, one drillship and one jack up rig in the Norwegian and British sector of the North Sea.

Smedvig was delisted from the OSE and NYSE, while Seadrill is listed on the Oslo Stock Exchange.

The company acquired multiple rigs throughout the 1970s and 1980s and in 1988 it bought the competitor Dyvi Offshore.

In January 2006, Seadrill won a bidding war against U.S. drilling rig company Noble Corporation, and subsequently acquired Smedvig ASA for an equity value of NOK 15 bn (US$2.4 bn).