Wayne Howard Nelson

US Patent:

42603340, Apr 7, 1981

Filed:

Feb 11, 1976

Appl. No.:

5/657247

Inventors:

Lawrence G. Kelley - Glenview IL
Wayne E. Nelson - Fenton MI
Clark J. Quist - Holland MI

Assignee:

Kelley Contract Dewatering Company - Glenview IL

International Classification:

F04B 1700

US Classification:

417 52

Abstract:

This is concerned with a submersible pump deep well system for dewatering construction excavations in which a solid, airtight casing and attached well screen are disposed in a generally upright position in a hole in the ground adjacent an excavation or the like with a pump disposed down in the airtight casing and a water discharge line extending upwardly therefrom with the casing being sealed so that it is airtight with a vacuum created therein with the arrangement being such that the pump is at a level above the well screen so that water in the surrounding ground formation will fill in the bottom of the hole through the well screen openings and rise to a level above the bottom of the casing, thereby sealing the lower end thereof to prevent air from flowing through the surrounding formation into the casing to break the vacuum therein.