Directional drilling apparatus and method utilizing eccentric stabilizer
US6321857A · kind A · utility
23Cited by
17References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1998 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Dec 14, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1014
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Directional drilling apparatus (26) for location on a drill string (20) comprises a stabilizer (32) having a mandrel (38) for connection to the drill string (20) and an eccentric non-rotating element (46) mounted on the mandrel (38) for offsetting the string (20) in the bore (22) and a non-rotating offset mass (34) for maintaining the element (46) at a selected orientation relative to the bore (22) as the drill string (20) rotates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.