Method of completing production wells for the recovery of gas from coal seams
Patent 4679630 Issued on July 14, 1987. Estimated Expiration Date: 
December 23, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 23, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIn situ oil shale process Coal seam fracing method Patent #: 4566539 InventorAssigneeApplicationNo. 06/812639 filed on 12/23/1985US Classes:166/305.1, Placing fluid into the formation166/280.1, Specific propping feature (EPO)166/308.1Fracturing (EPO)ExaminersPrimary: Novosad, Stephen J.Assistant: Odar, Thomas J. Attorney, Agent or FirmInternational ClassesE21B 43/25 (20060101)E21B 43/00 (20060101) E21B 43/26 (20060101) AbstractA method of completing a production well for the recovery of gas from a coal seam is disclosed. The well is of the type having a casing cemented in the well and the method comprises the steps of providing perforations in the casing above and/or below the coal seam, and hydraulically fracturing the coal seam through the perforations in the casing. | |
