Rock bit having a mechanical seal with superior thermal performance
AssigneeVarel International Ind., L.P.
InventorXiaobin Lu
Life of this patent
Estimating the term…
Abstract
A drill tool includes a bit body, at least one bearing shaft extending from the bit body and a cone mounted for rotation on the bearing shaft. A mechanical seal is disposed between the bearing shaft and the cone in a seal gland. The mechanical seal includes a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland. The mechanical seal further includes at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.
Claims36
A drill tool, comprising:
- a bit body;
- at least one bearing shaft extending from the bit body;
- a cone mounted for rotation on the bearing shaft;
- and
- a mechanical seal disposed between the bearing shaft and the cone in a seal gland, the mechanical seal including a rigid seal ring having a dynamic sealing surface with the cone and another non-sealing surface exposed to an aperture in the seal gland, the mechanical seal further including at least one cooling channel formed in the another non-sealing surface of the rigid seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland.
Apparatus, comprising:
- a mechanical seal adapted to be positioned between a journal and a rotating member, the mechanical seal defining a dynamic seal and including a rigid seal ring having a dynamic sealing surface and a non-sealing surface, and further including at least one cooling channel formed in the non-sealing surface of the rigid seal ring.
Dependencies are inferred from the claim text.