Oil and gas well disaster valve control system

Details Oil and gas well disaster valve control system Oil and gas well disaster valve control system

1975-11-06

1977-07-26

Moskowitz, Nelson

Communications: electrical

Selective

Interrogation response

340 18P, 175 40, 166 72, 340 155TN, E21B 3500

Patent

active

040386325

ABSTRACT:
A sonic energy signal is transmitted continuously through the walls of tubing extending down into an oil or gas well, in order to control a disaster valve at the lower end of the tubing. If the signal disappears, the valve shuts automatically. In one embodiment, the tubing functions as the core of a transformer. In another embodiment, the tubing conducts an acoustic signal. The sonic energy may be transmitted by either a hydraulic ram or a tuned hammer, which transmits energy vertically into the tubing walls.

REFERENCES:
patent: 2810546 (1957-10-01), Eaton et al.
patent: 3739845 (1973-06-01), Berry et al.
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3850237 (1974-11-01), Ahlstone et al.
Haase, "Acoustic Value Operating System", 1970, pp. 269-277, Offshore Tech. Conf. G-222.
Cooper, "Correlation Detection in a . . . Seismic Disturbances", 7/64, pp. 1378-1382, Jour. Acous. Soc. of Amer., vol. 36 No. 7, G-222.

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