Remotely operated well safety valves

Details Remotely operated well safety valves Remotely operated well safety valves

1974-08-22

1976-11-09

Leppink, James A.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166224A, 251294, 251319, E21B 4300

Patent

active

039905080

ABSTRACT:
A safety valve to be lowered into a well and adapted to close off the flow of production fluid upwardly from the well, and which is operated by an actuating cable extending upwardly toward the surface of the earth, with the cable or other element being preferably maintained under tension and acting to hold the valve in open condition so long as the tensioned condition exists, but to release the valve for automatic closing movement in the event of breakage of the cable or release of its tensioned condition for any other reason. The safety valve includes a ball type valve element which moves downwardly in response to upward movement of the main actuating element, and is turned between open and closed conditions by such downward movement of the ball valve.

REFERENCES:
patent: 1911323 (1933-05-01), Otis
patent: 2207033 (1940-07-01), Toney
patent: 2351322 (1944-06-01), Crake
patent: 2357189 (1944-08-01), Erwin
patent: 3351133 (1967-11-01), Clark, Jr. et al.
patent: 3675718 (1972-07-01), Kanady

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