Establishing communication between bore holes in solution mining

Claim 1

IN THE SOLUTION MINING OF A PRODUCT STRATUM LOCATED IN A SOLUBLE DEPOSIT WHICH INCLUDES STRATE OF VARYING COMPOSITIONS INCLUDING STRATA OF SOLUBLE NON-PRODUCT MINERALS BENEATH SAID PRODUCT STRATUM AND RELATIVELY THIN BANDS OF INSOLUBLE MATERIAL TRAVERSING SAID DEPOSIT WHEREIN A PLURALITY OF CASED BORE HOLES IS DISPOSED TO COMMUNICATE WITH SAID DEPOSIT, A CAVITY IS DEVELOPED TO COMMUNICATE WITH AN INFLUENT BORE HOLE AND AN EFFLUENT BORE HOLE AND MINERALS ARE EXRACTED FROM THE PRODUCT STRATUM BY FEEDING SOLVENT TO THE CAVITY THROUGH THE INFLUENT BORE HOLE AND WITHDRAWING DISSOLVED PRODUCT MINERALS FROM THE CAVITY THROUGH THE EFFLUENT BORE HOLE, THE IMPROVEMENT WHICH COMPRISES SELECTING A THIN INSOLUBLE BAND LOCATED IN SAID DEPOSIT IN THE VICINITY OF THE BOTTOM OF SAID PRODUCT STRATUM BUT ABOVE NON-PRODUCT MINERALS AND ESTABLISHING COMMUNICATION BETWEEN SAID BORE HOLES IN THE VICINITY OF SAID THIN INSOLUBLE BAND WHILE AVOIDING EXTRACTION OF EXTRACTABLE NON-PRODUCT MINERALS LOCATED IN THE DEPOSIT BELOW SAID THIN INSOLUBLE BAND BY PROVIDING A BORE HOLE TO THE VICINITY OF AND ABOVE SAID THIN INSOLUBLE BAND, PROVIDING A SECOND BORE HOLD REMOVED FROM THE FIRST NAMED BORE HOLE AND COMMUNICATING WITH THE VICINITY OF THE INSOLUBLE BAND, PROVIDING A FLEXIBLE CONDUIT THROUGH ONE OF SAID BORE HOLES TO CONTACT SAID INSOLUBLE BAND, BIASING SAID FLEXIBLE CONDUIT IN THE DIRECTION OF THE SECOND BORE HOLE AND URGING THE CONDUIT ALONG THE UPPER SURFACE OF THE INSOLUBLE BAND IN THE DIRECTION OF THE SECOND BORE HOLE WHILE FEEDING SOLVENT THROUGH SAID FLEXIBLE CONDUIT TO EXTRACT SOLUBLE MATERIAL DISPOSED ABOVE THE INSOLUBLE BAND AND WITHDRAWING EFFLUENT THROUGH THE FIRST BORE HOLE THEREBY DEVELOPING A PASSAGEWAY IN THE DIRECTION OF THE SECOND BORE HOLE UNTIL COMMUNICATION IS EFFECTED BETWEEN THE TWO BORE HOLES.