Patent ID: 9163458
Filing Date: 2015-10-20
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 retained within 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 retained within the second annular gland; a third ring including a sealing region with a second metal seal face in contact with the first metal seal face and forming a sliding metal-to-metal seal, a body region including a biasing surface axially opposite the second metal seal face, and an axially extending flexible member pivotally interconnecting the sealing region to the body region; a spring member configured to apply an axial force against the biasing surface of the third ring; and a radial drive connection between the second ring and the third ring.