Tandem roller stabilizer for earth boring apparatus
US4082373A · kind A · utility
8Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1976 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Sep 7, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The eccentric journals of a tandem roller stabilizer are azimuthally positioned relative to each other by cylindrical pins removably disposed in cylindrical holes extending off-axially parallel to the stabilizer axis, the holes being formed by semi-circular cross-section grooves in the outer periphery of the mandrel and correlative semi-circular cross-section grooves in the inner peripheries of the journals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.