Hydraulic borehole mining system
Patent 4401345 Issued on August 30, 1983. Estimated Expiration Date: 
April 22, 2002. 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.
April 22, 2002. 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 Re29021 1851565 1960932 2893716 3393013 3597166 3880470 Backwashing system for slurry pick-up used in hydraulic borehole mining devices Subterranean mining Liquid discharge nozzle with flow divider InventorAssigneeApplicationNo. 06/370607 filed on 04/22/1982US Classes:299/64, With material-handling means175/213, With suction pump inlet communicating with bore bottom175/67, Boring by fluid erosion299/17Jetting (e.g., hydraulic mining)ExaminersPrimary: Purser, Ernest R.Attorney, Agent or FirmInternational ClassesE21B 43/00 (20060101)E21B 43/29 (20060101) AbstractA hydraulic underground mining system for operating through a small diameter borehole into a subterranean body. An elongated mining tool includes a liquid jet nozzle that is movable in a vertical direction along the length of the mining tool for forming a directed jet stream to impact material in the ore body and convert the material into a slurry. An orifice is positioned below the jet so that slurry flows into the orifice, the latter being connected to a jet pump which returns generated slurry to the surface. Suitable hydraulic power means are provided for operating the jet pump and for moving the jet stream in vertical and circular directions. Means for monitoring and controlling the progress of mining and the condition of components of the system are provided to monitor and control the system from a centralized location. | |
