Subsurface formation monitoring system and method
US7798214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Aug 4, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/125
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface formation monitoring system comprises a conductive piping positioned within a borehole extending into the formation, a surface installed power and communication module, a downhole installed conductive casing or tubing sub comprising sensor(s) mounted on the sub, a data communication module for wireless communication of sensor measurements to the surface module, and a battery for providing power to the data communication module and the sensor. The surface module is coupled to the conductive piping and to a grounded return electrode coupled to the formation, and comprises an alternate current generator that defines an ingoing signal path along the conductive piping and sub, the ingoing signal flowing from the surface module to the sub and transmitting power from the generator to the sub. A return signal comprising sensor measurements is transmitted through a return signal path flowing from the sub to the surface module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.