Subsurface formation testing apparatus
US4893505A · kind A · utility
76Cited by
2References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for collecting a plurality of samples of fluids in earth formations traversed by a wellbore includes a pressure sensor for deriving a pressure measurement and a temperature sensor for simultaneously deriving a temperature measurement. The pressure measurement signals and the temperature measurement signal are transmitted to processing circuitry using a narrow band frequency modulated scheme. The temperature measurement is used to provide a real time temperature compensated pressure measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.