Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1982-05-03
1985-02-26
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular coupling link
340531, 340605, 340612, 340621, 340566, 340683, 310311, 310337, 116109, 181106, 181110, 73290V, 367 82, G08B 100, G01F 2300
Patent
active
045020418
ABSTRACT:
An offshore drilling tower has at least one upright hollow member extending from below the water to support an above-water platform. A detector in or on the hollow member, usually below the water, responds to a water leak into the hollow member. The detector includes a signal generator responsive to pressure or chemical effect of the water. The detector is effective when actuated by water intrusion into the hollow member and into contact with the detector to send a signal of a unique or distinct frequency through the member itself to a signal receiver, preferably on the platform. The receiver is tuned to the distinct frequency and is effective upon receipt of such signal to afford an indication that the detector has been actuated by a water leak at a particular location. Variously tuned signal generators can be located within and without the tower on different ones of the hollow members, so that each, when energized, actuates a comparably tuned receiver on the platform, thus affording unique indications of various leak locations.
REFERENCES:
patent: 3706981 (1972-12-01), Hart
patent: 4090193 (1978-05-01), Hinkle, Jr.
patent: 4329875 (1982-05-01), Nolting et al.
Crosland Donnie L.
The Regents of the University of California
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