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US 11,306,577 B2Granted
Calibrating electromagnetic corrosion detection tools via core saturation
AssigneeHalliburton Energy Services, Inc.
InventorsBurkay Donderici, Ahmed E. Fouda
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Abstract
Methods and devices used to calibrate EM corrosion detection tools may estimate the effects of the presence of a core on measurements to enable more accurate corrosion detection in the well line. The methods may involve sending voltages to a core of a well tool disposed in the well line to obtain signals while the core is in a saturated and unsaturated state. Subsequent measurements using the core may be calibrated using a constant resulting from the division of the signals achieved at the core in the saturated and unsaturated states.
Claims12
A well line detection method comprising the steps of:
- applying a first voltage at a core of a well tool disposed in the well line;
- logging at least one first signal using the well tool while the first voltage is applied to the core;
- removing the first voltage from the core of the well tool while the tool is disposed in the well line;
- logging at least one second signal using the well tool while the first voltage is removed from the core;
- and
- calibrating at least one measurement using both the first signal and the second signal to take into account and/or compensate for the effect of the core.
3 more elements
Dependencies are inferred from the claim text.