GB190302400A - Improvements in the Construction of Wells and the like - Google Patents

Abstract

2400. Deacon, G. F. Jan. 31. Wells; tunnels.-Relates to means for increasing the flow of water into wells, headings, adits. &c., by obviating the choking action of sand and silt and by reducing the resistance where the water enters. The well is sunk, without withdrawing the water, by a lining with a cutting-edge and grabs, by boring, by compressed air, or otherwise. The bottom is then stopped by concrete, or by a fitted piston, or, as shown in Fig. 1, by a cone c and concrete d, after which water is withdrawn in order to permit openings f to be made in the sides and bottom for entrance of water. These openings may be bored when the lining is in place, or may have been made before band and temporarily closed during sinking. Strainers g of wire gauze or coarse sand, and screwed plugs or cocks, are fitted in these openings, and perforated tubes may project through then into the water-bearing strata. The bottom may be fitted with a large cock e, and gravel, or other filtering-material, may be placed underneath. Fine silt or cementing-material in sand around the openings may be removed by injecting and releasing air, steam, water, or solvents so that only coarse sand is left. If the sand &c. is fine, it may be replaced by coarser material. If the water-bearing stratum is solid, it may be broken up around the well by tools introduced through the openings or by boring and probing from the surface, or from near the water-level.