purchases crude oil for the company's refineries in the US, has oil sands holdings in Alberta and four offshore blocks in the Beaufort Sea and Nova Scotia. The company's oil sands leases include joint ventures with Husky Energy in the Sunrise Energy Project (50%), and Devon Energy in Pike, and a partnership with Value Creation Inc. in the development of the Terre de Grace oil sands lease. The Sunrise oil sands project entered the development phase in 2012. , the Pike project, was in the regulatory approval phase, and the Terre de Grace project was in the resource appraisal phase. Corporate structure Integrated: 1955–1982 Holdings incorporated 26 March 1957: British Petroleum Company of Canada Limited renamed in 1969: BP Canada (1969) Limited renamed in 1970: BP Canada Limited renamed in 1971: BP Canadian Holdings Limited Operations (acquired 1971) incorporated 17 December 1925: Supertest Petroleum Corporation Limited renamed in 1971: BP Canada Limited renamed in 1979: BP Canada Inc. Marketing incorporated 15 June 1955: BP Canada Limitedrenamed in 1969: BP Oil Limited Refining incorporated 8 October 1958: BP Refinery Canada Limited Exploration and production incorporated December 1951: Triad Oil Company Limited renamed in 1969: BP Oil and Gas Limited merged into BP Canada Limited in 1972 Independent: 1982–1992 BP Canadian Holdings Limited – dissolved in 1982 BP Canada Inc. – reorganised in 1982 into: BP Refining and Marketing Canada Limited sold to Petro-Canada in 1983 BP Resources Canada Limited renamed BP Canada Inc. in 1984 became Talisman Energy in 1993 Leadership Chairman of the Board Graham F. Towers CMG, 1957–1969 Robert M. Fowler, 1969–1977 Derek F. Mitchell, 1977–1981 Robert W. Adam, 1981–1982 Roy F. Bennett, 1982–1984 Donald S. Harvie, 1984–1991 David A. Claydon, 1991–1992 President Sir Alastair F. Down MC OBE, 1957–1962 R. Norman Tottenham-Smith, 1962–1966 Derek F. Mitchell, 1966–1977 R. Walter Hanbidge, 1977–1983 M. Anthony Kirkby, 1983–1988 David A. Claydon, 1988–1991 Dr James W. Buckee, 1991–1992 References Oil companies of Canada Companies based in Calgary BP subsidiaries Canadian subsidiaries of foreign companies Bituminous sands of Canada Energy companies established in 1953 Non-renewable resource companies established in 1953 1953 establishments in Alberta