Well safety valve system

Details Well safety valve system Well safety valve system

1978-11-13

1981-06-16

Pate, III, William F.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166322, 166324, E21B 3410

Patent

active

042731860

ABSTRACT:
A well safety system comprising a tubing retrievable safety valve adaptable for being connected in a well tubing string with means therein, responsive to pressure, for opening and closing the valve. The tubing retrievable safety valve is to be connected, in the tubing string, below a landing nipple for receiving a secondary safety valve. The safety valve and landing nipple are connected by a common conduit for conducting a suitable pressure fluid for control and balance of the safety valve and a secondary valve landed in the landing nipple. Means are provided on the landing nipple for selectively flushing pressure fluid into the tubing bore. This abstract of the disclosure is neither intended to define the scope of the invention which, of course, is measured by the claims nor is it intended to limit the invention in any way.

REFERENCES:
patent: 3744564 (1973-07-01), Mott
patent: 3786863 (1974-01-01), Tausch
patent: 4026362 (1977-05-01), Moh

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