O-ring seal with lubricant additives for rock bit bearings

Details O-ring seal with lubricant additives for rock bit bearings O-ring seal with lubricant additives for rock bit bearings

E - Fixed Constructions

21

B

E21B 10/24 (2006.01) E21B 10/22 (2006.01) F16J 15/06 (2006.01) F16J 15/32 (2006.01)

Patent

CA 2217751

O-ring seals for rock bit bearings comprise a body formed from an elastomeric material having one or more lubricant additive uniformly distributed throughout to reduce the coefficient of friction and stick slick amplitude at O-ring seal surfaces. The lubricant additives are selected from the group consisting of polytetrafluoroethylene, hexagonal boron nitride, flake graphite, ultra-high molecular weight polyurethane, and mixtures thereof. O-ring seals made from elastomeric compositions of this invention comprise in the range of from about 85 to 99 percent by volume elastomeric material, and in the range of from about 1 to 15 percent by volume of the lubricant additives based on the total volume of the composition.

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