System and method for an AC powered downhole gauge with capacitive coupling
US8138622B2 · kind B2 · utility
14Cited by
18References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2007 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jul 5, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Borehole instruments are powered by AC instrument power transmitted on all three phases of a power cable concurrently carrying three phase motor power, the instrument power transmitted at a multiple of the motor power frequency and having a corresponding fraction of the motor power voltage, and received via a capacitive coupling sufficient to withstand high-voltage cable insulation testing. The phase-to-neutral motor power provides approximately the same power level to the borehole instruments if a phase shorts to ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.