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

1972-10-02

1976-06-01

Moskowitz, Nelson

Communications: electrical

Selective

Interrogation response

166 72, 175 48, 340239R, G01V 114, E21B 3500

Patent

active

039613089

ABSTRACT:
A signal is transmitted through the walls of tubing extending down into an oil well in order to control a disaster valve at the lower end of the tubing. If the signal disappears, the valve shuts. In one embodiment, the tubing functions as the core of a transformer. In another embodiment, the tubing conducts an acoustic signal.

REFERENCES:
patent: 3115774 (1963-12-01), Kolb
patent: 3588804 (1971-06-01), Fort
patent: 3739845 (1973-06-01), Berry et al.
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3850237 (1974-11-01), Ahlstone et al.

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