Underreamer for increasing a bore diameter
US9915101B2 · kind B2 · utility
3Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2013 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Jul 21, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/322
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An underreamer for increasing the diameter of a bore. The underreamer includes a substantially cylindrical body having an axial bore therein. A mandrel may extend axially through the axial bore. One or more cutter blocks are movably coupled to the body. A ratio of a height of the cutter block to a diameter of the body is between about 0.35:1 and about 0.50:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.