Coiled tubing safety valve and assembly

Details Coiled tubing safety valve and assembly Coiled tubing safety valve and assembly

1992-08-12

1994-02-15

Britts, Ramon S.

Wells

Valves, closures or changeable restrictors

Fluid operated

E21B 3412

Patent

active

052858510

ABSTRACT:
A flexible subsurface well safety valve for installation in the interior of a coiled tubing. A coiled tubing member is connected in a coiled tubing and a safety valve, which is flexible for allowing bending about its longitudinal axis, is positioned in the bore of the tubular member. The valve has sufficient flexibility to coil around a coiled tubing reel. The safety valve includes a housing with a hydraulic piston and cylinder assembly coaxially positioned above the housing and a biasing spring coaxially positioned above the housing and connected to the hydraulic means.

REFERENCES:
patent: 4125162 (1978-11-01), Groves, Sr. et al.
patent: 4473122 (1984-09-01), Tamplen
patent: 4658904 (1987-04-01), Doremus et al.
patent: 4844166 (1989-07-01), Going, III et al.
patent: 4923012 (1990-05-01), Hopmann
patent: 5020600 (1991-06-01), Coronado
patent: 5180012 (1993-01-01), Crawford
patent: 5207275 (1993-05-01), Strattan et al.
patent: 5211243 (1993-05-01), Strattan et al.
Drawing 21449-000-00000 of Camco, Inc., dated Jun. 1981, entitled R-20 Safety Valve.
Co-pending application Ser. No. 07/840,254 filed Feb. 24, 1992 entitled "Coiled Tubing Gas Lift Assembly".

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