Patent ID: 11959879
Assignee: SOUTHWEST PETROLEUM UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A device for determining characteristics of metallic casing and casing attenuation, comprising a processor and a memory, and a computer program is stored on the memory, and when the computer program is executed by the processor, cause the processor to:
obtain the ratio of first magnetic field intensities around a solenoid with a metallic casing and without the metallic casing at DC mode;
obtain magnetic related parameter of the metallic casing through the ratio of the first magnetic field;
obtain magnetic permeability of metallic casing through the magnetic related parameter of the metallic casing;
obtain the ratio of second magnetic field intensities around a solenoid with the metallic casing and without the metallic casing at AC mode;
obtain electrical related parameter of the metallic casing through the ratio of the second magnetic field and the magnetic related parameter of the metallic casing;
obtain electrical conductivity of metallic casing through the electrical related parameter of metallic casing;
obtain casing attenuation of metallic casing through the magnetic related parameter and the electrical related parameter of metallic casing.