Solution mining of an inclined structure
Patent 4411474 Issued on October 25, 1983. Estimated Expiration Date: 
May 20, 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.
May 20, 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 2682396 2822158 3341252 Solution mining potassium chloride from heated subterranean cavities Subterranean cavity chimney development for connecting solution mined cavities Patent #: 4290650 InventorAssigneeApplicationNo. 06/265665 filed on 05/20/1981US Classes:299/4Input and output wellsExaminersPrimary: 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 relatively thin, inclined strata at substantial depths and involving the dissolution of ore strata, overlain by insoluble strata, while leaving the remainder of the formation in place. Water is injected down a bore hole at a predetermined rate and, being much less dense than present brine, flows in an updip direction along the top of the cavity to a forward mining face remote from the drill hole. Loaded, heavy brine flows downdip along the bottom of the stratum to an outflow pipe communicating with the bottom of the bore hole. | |
