Acoustically controlled subsurface safety valve system

Details Acoustically controlled subsurface safety valve system Acoustically controlled subsurface safety valve system

1976-05-03

1978-02-14

Leppink, James A.

Wells

With electrical means

166 72, 340 18NC, E21B 4300, E21B 3303

Patent

active

040733416

ABSTRACT:
An acoustically controlled system includes means for transmitting any of several different forms of sonic energy signals through the walls of a tubing extending down into a gas or oil well. There, any of several functions may be performed, such as a control of a disaster valve located at the lower end of the tubing. Depending upon the function selected, the valve may hold itself open irrespective of the continuity of the sonic signal, or may slam shut if the sonic energy ends. Preferably, the selection control depends upon the pulse repetition rate of the sonic energy pulses.

REFERENCES:
patent: 2679903 (1954-06-01), McGowen, Jr. et al.
patent: 2810546 (1957-10-01), Eaton et al.
patent: 3115774 (1963-12-01), Kolb
patent: 3739845 (1973-06-01), Berry et al.
patent: 3741303 (1973-06-01), Terral
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3799259 (1974-03-01), Dinning
patent: 3850237 (1974-11-01), Ahlstone et al.

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