发明名称 |
RADAR MEASURES WATER LEVEL IN WELL DURING DRILLING |
摘要 |
A method for measuring the water level in a well including the steps of radiating an electromagnetic wave to a gap between a boring drill rod and a casing pipe by using a transmitting antenna, receiving the electromagnetic wave reflected by a surface of the water level in the casing pipe by using a receiving antenna; then measuring a distance between the surface of the water level and the receiving antenna based on the going and returning time of the electromagnetic wave. |
申请公布号 |
NZ209403(A) |
申请公布日期 |
1988.08.30 |
申请号 |
NZ19840209403 |
申请日期 |
1984.08.31 |
申请人 |
NIPPON STEEL CORP |
发明人 |
HIROKATSU YASHIRO;JIRO OHNO |
分类号 |
E21B47/047;G01F23/284;G01S13/10;G01S13/34 |
主分类号 |
E21B47/047 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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