Wave seal to resist extrusion during equalization

Details Wave seal to resist extrusion during equalization Wave seal to resist extrusion during equalization

E - Fixed Constructions

21

B

E21B 17/00 (2006.01) E21B 34/14 (2006.01) E21B 43/12 (2006.01)

Patent

CA 2436637

The present invention provides for dynamic sealing in a flow control device. In an embodiment, the flow control device comprises a closure sleeve adapted to slide over the tubing hole. The closure sleeve has a front edge having a wave-like surface. One or more seals are mounted downstream of the tubing hole. The one or more seals cooperate in a fluid-tight manner with the closure sleeve. A protective sleeve is mounted in alignment with the closure sleeve and proximate to the one or more seals. The protective sleeve has a top edge adapted for mating engagement with the wave- like surface of the front edge of the closure sleeve. A return mechanism is provided for automatically returning the protective sleeve to a covering position in which the protective sleeve covers the first seal when the first seal is not covered by the closure sleeve.

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