Compression set, large expansion packing element

Details Compression set, large expansion packing element Compression set, large expansion packing element

E - Fixed Constructions

21

B

E21B 33/128 (2006.01) E21B 33/12 (2006.01)

Patent

CA 2449660

A packing element, which is a composite structure, is disclosed. Components contain the sealing portion to minimize extrusion. The element is retained in tension when running in to minimize damage. In the preferred embodiment, a collapsing sleeve transfers setting force applied at one end, to the opposite end to avoid the problem of bunching up the element adjacent to where it is being compressed which could, if not addressed, result in insufficiently low sealing contact pressure in regions remote from where the pushing force is applied.

L'invention concerne un élément d'emballage présentant une structure composite. Ces composants renferment une portion de fermeture hermétique pour minimiser l'extrusion. Ledit élément est maintenu sous tension, lorsqu'il est amené pour minimiser les dégâts. Dans un mode de réalisation préféré, un manchon escamotable transfère la force de fixation appliquée à une extrémité à l'extrémité opposée, de manière à éviter le problème d'entassement de l'élément adjacent à l'endroit où il est comprimé, ce qui pourrait sinon déboucher sur une pression de contact de scellement faible insuffisante dans des zones éloignées de l'endroit où la force de compression est appliquée.

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