Elastomeric seal assembly having auxiliary annular seal...

Details Elastomeric seal assembly having auxiliary annular seal... Elastomeric seal assembly having auxiliary annular seal...

E - Fixed Constructions

21

B

E21B 10/08 (2006.01)

Patent

CA 2514713

A drill bit and seal assembly therefor include a seal gland, an elastomeric sealing seal disposed in the seal gland and having a dynamic sealing surface and a static sealing surface, and at least one auxiliary elastomeric annular seal member disposed between the static sealing surface of the sealing seal and the seal gland. The auxiliary annular seal member serves to prevent relative movement of the sealing seal relative to the surfaces of the seal gland and to permit sealing seals of various cross-sections and shapes to adapt to and function with a conventionally sized and shaped gland. The auxiliary annular seal member is sized and configured and its material properties selected so as to impart the appropriate squeeze to the sealing seal to provide the desired contact pressure and footprint. Choice of the appropriate auxiliary seal member may permit the same sized seal to be employed in seal glands of differing sizes.

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