Patent ID: 9091130
Filing Date: 2015-07-28
Classification: E21B

Abstract:
1. A sealing system for a drill bit including a shaft region and a rotating cone, comprising: a first annular gland defined in the rotating cone; a first ring press-fit in the first annular gland and having a first metal seal face; a second annular gland defined at a base of the shaft region; a second ring press-fit in the second annular gland, said second ring including a radially extending flange region having a plurality of first axially extending apertures and a plurality of second axially extending apertures; a third ring positioned between the first and second rings, said third ring including a second metal seal face in contact with the first metal seal face and further including a biasing surface axially opposite the second metal seal face and a plurality of third axially extending apertures; a spring member inserted within each first axially extending aperture and configured to apply an axial force against the biasing surface of the third ring; and a pin member inserted between each pair of second and third axially extending apertures.