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1. GB2384504 - Groundwater pumping apparatus

Office United Kingdom
Application Number 0304365
Application Date 31.07.2001
Publication Number 2384504
Publication Date 02.04.2003
Publication Kind B
IPC
E02D 3/10
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
3Improving or preserving soil or rock, e.g. preserving permafrost soil
02Improving by compacting
10by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
E02D 19/10
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
19Keeping dry foundation sites or other areas in the ground
06Restraining of underground water
10by lowering level of ground water
E21B 43/12
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
CPC
E21B 43/121
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
121Lifting well fluids
E02D 3/10
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS
3Improving or preserving soil or rock, e.g. preserving permafrost soil
02Improving by compacting
10by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
E02D 19/10
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS
19Keeping dry foundation sites or other areas in the ground
06Restraining of underground water
10by lowering level of ground water
Applicants NISHIMATSU CONSTR CO LTD
SEIKO KOGYO KK
NIPPON KENSETSU KIKAI SHOJI CO
ASAHI TECHNO CORP
Inventors TAKAHASHI SHIGEYOSHI
MINAMIJIMA YOSHIYUKI
MATSUMURA SHUICHI
YAMAGUCHI TORU
Priority Data 0106608 31.07.2001 JP
2000234035 02.08.2000 JP
Title
(EN) Groundwater pumping apparatus
Abstract
(EN)
An underground water pumping device capable of effectively performing a water collecting/water pumping operations with a relatively simple structure and effectively utilizing an existing deep well device, comprising an outer tube buried in the ground and an inner tube having a length generally equal to that of the outer tube and disposed in the outer tube through a clearance provided therebetween, a shielding member for shielding the upper end part of the outer tube from the upper end part of the inner tube, a decompressing means for reducing a pressure in the inner tube, and a pumping means for pumping up the underground water came from the underground water inlet into the inner tube, the outer tube further comprises a water passing part at the lower part thereof and the inner tube further comprises an underground water inlet at the lower end part thereof, wherein the underwater inlet is positioned under the upper end part of the water passing part.