Arrangement and method for deploying downhole tools to locate casing collar using xy magnetometers
US10472952B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2017 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Feb 18, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for locating a collar of a casing of a wellbore is disclosed. A sensor for measuring a magnetic field is conveyed through the casing on a tool string. A physical model is formed of a process of obtaining a magnetic measurement of the casing with the sensor. A simulation of the physical model is run through a processor to select a design parameter of the tool that allows for using the sensor at a determined value of an operational parameter for obtaining the measurement at a selected signal-to-noise ratio. The tool is conveyed into the wellbore and the sensor set to the determined value of the operational parameter. The magnetic measurement of the casing is obtained using the sensor, and the collar is located using the obtained magnetic measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.