To effectively and stably separate and extract natural gas contained in groundwater, in a well for pumping the groundwater that contains natural gas.
The well is inserted into an underground layer wherein water-soluble natural naturally occurs, so as to be used for separating and extracting the natural gas from the groundwater containing the natural gas. The well comprises an outer pipe (2), which is equipped with a slit (2a) for taking in the groundwater, and an inner pipe (3) having a diameter smaller than that of the outer pipe. The lowermost part of the inner pipe (3) is positioned above that of the outer pipe (2). A ground-section hole opening of the inner pipe (3) and that of the outer pipe (2) are each sealed. The inner pipe (3) is equipped with a means for reducing and adjusting pressure in the inner pipe (3). The outer pipe (2) is provided with an adjusting means for keeping the inside of the outer pipe (2) at a normal pressure.
AIZAWA YOJIN
KAYAMA HIROYUKI
JPS3716954B1 | ||||
JPS5328203U | 1978-03-10 | |||
JPS60208593A | 1985-10-21 | |||
JPS3623707B1 |
Shoji Okamoto
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