Multiple-bed solution mining of an inclined structure
Patent 4418960 Issued on December 6, 1983. Estimated Expiration Date: 
November 4, 2001. 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.
November 4, 2001. 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 3510167 Subterranean cavity chimney development for connecting solution mined cavities Patent #: 4290650 InventorAssigneeApplicationNo. 06/318102 filed on 11/04/1981US Classes:299/5Dissolving or chemical reactionExaminersPrimary: Purser, Ernest R.Attorney, Agent or FirmInternational ClassesE21B 43/00 (20060101)E21B 43/28 (20060101) AbstractSolution mining method particularly adapted for recovery of potash and the like from multiple beds of relatively thin, inclined strata at substantial depths. Dissolution of each ore strata overlain by an insoluble and impermeable strata takes place through a single borehole in sequential order beginning with the deepest ore strata. Water is injected down a borehole at a predetermined rate and, being much less dense than present brine, flows in an updip direction along the top of the cavity to the forward mining face remote from the drill hole. Loaded, heavy brine flows downdip along the bottom of the cavity to an outflow pipe communicating with the bottom of the cavity. | |
