Magnetic permeability sensor with permanent magnet for downhole sensing
US11802850B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2020 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | Jul 31, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/066
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensing apparatus in the present disclosure is configured to measure magnetic flux of a magnetic field generated by a magnetic source and flowing through a sample slurry to determine magnetic permeability of the sample slurry. The sensing apparatus comprises a magnetic sensor inside a sensor housing that measures magnetic flux through a sensor housing made of a ferromagnetic material. The magnetic sensor sends measurements of the magnetic flux to a computing device that determines the presence of cementing fluids in the slurry based on the magnetic flux measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.