Apparatus and method for down hole vibration spectrum analysis
US4150568A · kind A · utility
29Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1978 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Mar 28, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H3/08
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus and a method are provided for detecting and measuring vibrations of a selected portion of a drill string in a bore hole. The vibrations are detected by a transducer which produces an electrical signal representative of the vibrations. The signal is applied to a band-pass filter which produces an output signal representative of vibrations occurring at frequencies within the pass band of the filter. The pass band is repetitively stepped through a predetermined frequency range under the control of digital circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.