Composite drill collar
US4708203A · kind A · utility
14Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 29, 1986 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | May 29, 2006 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill collar is formed from a composite material to protect equipment during drilling operations as in oil and gas exploration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.