发明名称 |
Tapered friction bearing assembly |
摘要 |
A bearing structure including first and second tapered bearing surfaces for accommodating on-bottom and off-bottom thrust and radial forces on a drive shaft in a down hole drilling environment and further including a radial bearing mounted between the first and second tapered bearings for restricting bending of the drive shaft.
|
申请公布号 |
US4657090(A) |
申请公布日期 |
1987.04.14 |
申请号 |
US19860823344 |
申请日期 |
1986.01.28 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
GECZY, BELA |
分类号 |
E21B4/00;F16C17/10;F16C33/04;(IPC1-7):E21B4/02 |
主分类号 |
E21B4/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|