Borescope drill pipe and light guide sleeve
US5449919A · kind A · utility
4Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1994 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Feb 8, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/954
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A borescope for inspecting the inside of bores such as drill pipe bores includes an elongate shaft to extend into the pipe. The shaft has an optical eye for directing incident light from a light source toward an inside surface of the bore and a receptor to receive emitted light therefrom. The shaft may be rotated eccentrically about the bore axis so that the distance of the optical eye from a sector of the interior surface to be inspected is always less than the radius of the bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.