Even if it were true, highly doubtful. there wouldn't really anything wrong with that in a free market because their competitors would underbid them. But we don't have a free market....
You don't know what you are talking about. Whoever controls the pipeline, controls the price. It's price control without collusion.
BP and Exxon wanted the natural gas to go to the midwest because that is their market area. Conoco was already building LNG tankers in anticipation of a Valdez pipeline. BP, being a foreign company, is not allowed to own ships and therefore did not want the Valdez pipeline. They were trying to shut out Conoco.
Also, BP opposes drilling in the ANWR because they are not permitted to increase their Alaska holdings. They used to support the drilling, until they took over ARCO.