Well perforating method for solution well mining

Details Well perforating method for solution well mining Well perforating method for solution well mining

1977-06-24

1978-09-12

Novosad, Stephen J.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Input and output wells

299 5, 166222, 166 55, E21B 43114, E21C 4114

Patent

active

041133145

ABSTRACT:
An improved method of solution well mining is provided which, among other advantages, enhances the injectivity of the wells and eliminates the need for underreaming and the use of well screens. In solution well mining, a leaching solution is pumped into an injection well so as to flow through a mineralized zone to a plurality of production wells, the solution which contains the mineral to be recovered being pumped out of the production wells. The invention provides for using a high pressure water jet to perforate the cemented casings of the well so as to, inter alia, enhance injectivity and provide sand control. The perforations are arranged in a preselected nonuniform pattern in the production well, with the density being the greatest at the bottom of the zone, so as to promote uniform flow of the solution.

REFERENCES:
patent: 2019418 (1935-10-01), Lang
patent: 3055424 (1962-09-01), Allen
patent: 3130786 (1964-04-01), Brown et al.
patent: 3175613 (1965-03-01), Hough et al.
patent: 3797590 (1974-03-01), Archibald et al.
patent: 3860289 (1975-01-01), Learmont
patent: 4047569 (1977-09-01), Tagirov et al.

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