Method for in situ minefields
US4125289A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1977 |
| Grant date | Nov 14, 1978 |
| Priority date | — |
| Expiry date | Dec 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S166/901
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A circulation tubing string is disposed about the lixiviant return tubing string in the production hole of an in situ minefield. The circulation string extends from the surface to a point near a packer which defines the top of the leaching interval. A fluid coupler provides a fluid flow path between the annular cross-section regions between the production hole casing and the circulation string, and between the circulation string and the lixiviant return string. A flow of cooling fluid is maintained from the surface through the circuital path defined by the annular cross-section regions and the fluid coupler, particularly including the exterior surface of the production tubing string. The fluid is maintained at a temperature and flow rate so that the pregnant leach liquor flows in the production tubing string between the leaching interval and the surface is characterized by a predetermined temperature drop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.