Under reamer
US8936110B2 · kind B2 · utility
14Cited by
33References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Apr 24, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/322
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An under-reamer includes a body and extendable cutters mounted on the body. The under-reamer is configured to be cycled between a first configuration in which the cutters are retracted and a second configuration in which the cutters are movable between retracted and extended positions. A control mechanism is provided and is configurable to prevent the under-reamer cycling between the first and second configurations and thus maintains the under-reamer in a selected one of the first and second configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.