Drilling systems for cleaning wellbores, bits for wellbore cleaning, methods of forming such bits, and methods of cleaning wellbores using such bits
US8887836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2009 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Nov 20, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Wellbore cleaning bits include a bit body, at least one cutting structure on the bit body, and a shank configured to attach the bit body to a drill string. Drilling systems for cleaning wellbores include a wellbore cleaning bit coupled to a drill string. The wellbore cleaning bit may include a casing bit body and a shank attached to the casing bit body and the drill string. A casing bit may be attached to a shank having a connection portion configured for attachment to a drill string to form wellbore cleaning bits for cleaning at least a section of a wellbore. Furthermore, a casing bit may be advanced into a wellbore using a drill string to clean a wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.