Combined stabilizer and reamer for drilling well bores
US4231437A · kind A · utility
44Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1979 |
| Grant date | Nov 4, 1980 |
| Priority date | — |
| Expiry date | Feb 16, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1057
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An upper stabilizer and a lower reamer are mounted on an integral or one-piece body adapter to be connected in a tubular drilling string for drilling well bores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.