Earth boring tool
US4189012A · kind A · utility
16Cited by
19References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Jan 30, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller reamer body is provided with junk receiving pockets that are downward extensions of the body cavities in which the rollers and their shaft mounting blocks are disposed. The slots have upwardly slidably openable or removable outside wall panels so that junk can be dumped from the slots while the reamer is still vertical in the drill string, making it unnecessary to disconnect the reamer to dump the junk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.