Valves and valve actuation – Blow-out preventers – Deformable annulus
Patent
1988-11-18
1989-08-22
Fox, John
Valves and valve actuation
Blow-out preventers
Deformable annulus
277235R, E21B 3306
Patent
active
048588822
ABSTRACT:
An oil well blowout preventer has a housing with axially aligned entrance and exit pipe casing bores and a coaxially aligned hemispherical cavity in the upper portion of the housing. A ring-shaped, convex upper surface sealing member fits conformally within the hemispherical cavity and is drivable upwards by a hollow, hydraulically actuated piston coaxially encompassing the lower exit bore of the housing. The upper annular surface of the piston is beveled downwards and inwards to mate with the bottom annular surface of the sealing member. The sealing member is comprised of incompressible, tooth-like elements imbedded in a resilient matrix. Force limiting means in the sealing member prevent damagingly large radial impact forces of the teeth-like elements with drill string components disposed longitudinally within the device. In one embodiment, resilient material is interposed between the actuating piston and the incompressible element to limit impact force. In another embodiment, the incompressible element of the sealing member are made up of parts movable with respect to one another, to limit impact force.
REFERENCES:
patent: 3323773 (1967-06-01), Walker
patent: 3667721 (1972-06-01), Vujasinovic
patent: 4460149 (1984-07-01), Schaeper et al.
Beard Joseph O.
Granger Stanley W.
Sveen Frode
Chapin William L.
Fox John
LandOfFree
Blowout preventer with radial force limiter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blowout preventer with radial force limiter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blowout preventer with radial force limiter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2414306