Downhole pressure and temperature monitoring system
US4803483A · kind A · utility
9Cited by
17References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jul 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for monitoring the temperature and pressure in a well bore is used in connection with a submersible pump disposed in the well bore and electrically energized by a power conductor suspended in the well bore. A plurality of resistors and a plurality of pressure sensitive switches are disposed in the well bore along with a temperature sensitive circuit element. A constant current source at the surface provides a dc sensing signal that is superimposed on the power cable. A single voltage reading taken at the surface provides a measure of both temperature and pressure in the well bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.