Patents Represented by Attorney, Agent or Law Firm Brigitte Jefferey
  • Rock bit face seal having lubrication gap
    Patent number: 6427790
    Abstract: A seal arrangement useful in a rolling cutter rock drill bit includes a pair of rigid rings disposed between the leg of the bit body and the rolling cutter. The rings have opposing faces, which have opposing sealing surfaces. The sealing surfaces occupy a portion of the faces and include wear resistant material. A gap is formed between a portion of the faces, the gap allowing lubrication to flow to the sealing surfaces from the bit's bearing cavity.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 6, 2002
    Assignee: Schlumberger Technology Corporation
    Inventor: Bruce H. Burr