Subsurface well apparatus having flexing means and method of usi

Details Subsurface well apparatus having flexing means and method of usi Subsurface well apparatus having flexing means and method of usi

1976-06-07

1978-01-10

Leppink, James A.

Wells

Pistons, fluid driven into well

With stop

166322, E21B 3316, E21B 4312

Patent

active

040673871

ABSTRACT:
A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve to through-the-flowline serviced wells. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location.

REFERENCES:
patent: 3268006 (1966-08-01), Hayes
patent: 3302721 (1967-02-01), Yetman
patent: 3312283 (1967-04-01), Yetman
patent: 3568770 (1971-03-01), Fredd
patent: 3606926 (1971-09-01), Schwegman
patent: 3826462 (1974-07-01), Taylor
6 "Otis Safety Systems & Automatic Control Equipment"cited by applicant in parent application Ser. No. 580,228.

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