Wellbore consolidating tool for rotary drilling application
US8245775B2 · kind B2 · utility
1Cited by
17References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2010 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Aug 30, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/138
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subpart of a drill string is described having an outer circumferential surface which is contoured and adapted to engage the wall of the borehole with a small angle of attack while exerting during rotary drilling operations an compacting pressure on mud cake and/or cuttings present in the annulus between the drill string and the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.