发明名称 |
Rock bit having a mechanical seal with superior thermal performance |
摘要 |
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. |
申请公布号 |
US8783385(B2) |
申请公布日期 |
2014.07.22 |
申请号 |
US201113046328 |
申请日期 |
2011.03.11 |
申请人 |
Varel International Ind., L.P. |
发明人 |
Lu Xiaobin |
分类号 |
E21B10/00;F16J15/34;E21B10/25 |
主分类号 |
E21B10/00 |
代理机构 |
Gardere Wynne Sewell LLP |
代理人 |
Gardere Wynne Sewell LLP ;Szuwalski Andre M. |
主权项 |
1. 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 metal seal ring with a full metal body having a metal dynamic sealing surface in sliding contact with a metal surface associated with the cone and a metal non-sealing surface exposed to an aperture in the seal gland, the mechanical seal further including at least one cooling channel formed in the metal non-sealing surface and extending into the metal body of the metal seal ring, the cooling channel having an open end in fluid communication with the aperture in the seal gland. |
地址 |
Carrollton TX US |