Systems and methods for monitoring temperature using a magnetostrictive probe
US9702243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Aug 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2205/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for monitoring temperature distribution in downhole equipment using magnetostrictive probes. In one embodiment, an ESP motor has a stator with a rotor and shaft rotatably positioned within the stator. Magnetostrictive sensors are positioned within the motor. Each magnetostrictive sensor has a transducer, a probe, and electronic circuitry coupled to the transducer. The circuitry generates an initial electrical signal that is conveyed to the transducer. The signal passes through one or more coils in the transducer, generating magnetic fields that induce an acoustic signal in the probe. The acoustic signal propagates through the probe and waves are reflected from reflection points in the probe. The transducer senses the reflected acoustic waves and provides corresponding electrical signals to the circuitry, which determines timing intervals associated with the reflected waves and uses this information to determine temperatures at one or more locations in the probe (hence in the monitored equipment).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.