Drilling head for reboring a stuck valve
US8042613B2 · kind B2 · utility
16Cited by
14References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2008 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Feb 28, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/909
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling head, method of drilling, and use of the drilling head, for reboring a stuck valve or drilling into the formation downhole and, in particular a drilling tool having a drilling head and a driving unit. The drilling head includes a hole saw beside a drill bit for cutting out a piece from the stuck valve. A drilling system includes the drilling tool and a driving tool for moving the drilling tool downhole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.