Hydraulic mining method
Patent 4536035 Issued on August 20, 1985. Estimated Expiration Date: 
June 15, 2004. 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.
June 15, 2004. 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 References 1851565 2518591 2720381 3155177 3393013 3439953 3797590 3900226 Method of processing coal channels in underground coal gasification Subterranean drilling and slurry mining InventorsAssigneeApplicationNo. 06/621294 filed on 06/15/1984US Classes:299/17, Jetting (e.g., hydraulic mining)166/52, PLURAL WELLS175/67Boring by fluid erosionExaminersPrimary: Novosad, Stephen J.Assistant: Goodwin, Michael A. Attorney, Agent or FirmInternational ClassesE21B 43/00 (20060101)E21B 43/29 (20060101) AbstractA method of hydraulically mining an underground pitched mineral vein comprising drilling a vertical borehole through the earth's lithosphere into the vein and drilling a slant borehole along the footwall of the vein to intersect the vertical borehole. Material is removed from the mineral vein by directing a high pressure water jet thereagainst. The resulting slurry of mineral fragments and water flows along the slant borehole into the lower end of the vertical borehole from where it is pumped upwardly through the vertical borehole to the surface.Field of SearchJetting (e.g., hydraulic mining) | |
