Wellbore consolidating tool for rotary drilling applications
US7810559B2 · kind B2 · utility
1Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Nov 25, 2028 |
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.