1
Harold J Vinegar, Kevin Albert Maher, Scott Lee Wellington: Upgrading and mining of coal. Shell Oil Company, November 29, 2005: US06969123 (279 worldwide citation)

A method for treating a coal formation to alter properties of coal in the formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the formation. Heat may be allowed to transfer from the one or more heaters to a part of the formation. In certai ...


2
Harold J Vinegar, Kevin Albert Maher, Scott Lee Wellington: Upgrading and mining of coal. Del Christensen, Shell Oil Company, September 18, 2003: US20030173085-A1 (2 worldwide citation)

A method for treating a coal formation to alter properties of coal in the formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the formation. Heat may be allowed to transfer from the one or more heaters to a part of the formation. In certai ...