Composite material structures having reduced signal attenuation
US5988300A · kind A · utility
24Cited by
11References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Oct 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to composite material structures having reduced signal attenuation properties. In particular, the invention relates to composite drillstring components with electromagnetic properties and acoustic properties that enable the use of electromagnetic, acoustic and nuclear sensing equipment to obtain data from a wellbore from within a drill pipe. In a specific embodiment, a composite tube is incorporated with end-fittings which enable its incorporation into a drillstring thereby permitting the use of logging equipment from within the composite tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.