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RUST ENVIRONMENT & INFRASTRUCTURE
Acquired by Earth Tech Inc in 1998



ARCO ALASKA INC
Acquired by Phillips Petroleum Co in 2000, see ConocoPhillips Alaska Inc



ARROWHEAD ENERGY LIMITED
Acquired by Austral Pacific Energy Ltd in October 2006.



ARTHUR ENGINEERS INC
Out of business in 1997



ASCENTEX ENERGY INC
Name changed to Bonavista Petroleum Ltd in March 1997.



ASSOCIATED GAS RESOURCES INC
See Torch Energy Services Inc



ATKINSON PETROLEUMS 1972 LTD
See APL Oil & Gas 1998 Ltd



ATLANTIS RESOURCES LTD
Acquired by Grad & Walker Energy Corporation in December 1994.



AUSQUACAN ENERGY LIMITED
Sold to Beau Canada Exploration Ltd



AUSTEX OIL & GAS LTD
Dissolved in December 1998.



PHILLIPS PETROLEUM TIMOR SEA INC
Acquired by Tokyo Electric Power and Tokyo Gas Co. Ltd. in June 27 and name changed to Tokyo Timor Sea Resources Inc.



AVID OIL & GAS LTD
Acquired by Husky Energy Inc in June 2001



AVIPS PETROLEUM INC
Out of business in 1998



AXEM RESOURCES INC
Acquired by Westport Oil & Gas Company Inc in October 1997



B & R OIL COMPANY
Out of business in 1998



BACA RESOURCES LTD
See Cordex Petroleums Inc.



BACKER PETROLEUM CORPORATION
Amalgamated with Allied Oil & Gas Corporation in September 2000.



BAHRAIN NATIONAL OIL COMPANY - BANOCO
Merged with Bahrain Petroleum Co in January 2000



BAKER & TAYLOR DRILLING CO
Out of business.



BALLISTIC ENERGY CORPORATION
Acquired by Stampeder Exploration Ltd in June 1996



BARRETT RESOURCES CORP
Acquired by The Williams Companies in August 2001, see Williams Exploration and Production Group



BARRINGTON PETROLEUM LTD
Acquired by Petrobank Energy & Resources Ltd in August 2001



WINTERSHALL GABON PETROLEUM LIMITED
Dissolved in September 1980.



ENRON OIL AND GAS INDIA LIMITED
Acquired by BG Group plc in February 2002.



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