Ultrasonic Logging Trajectory Positioning for Eccentric Casing Inspection

The patent implements an iterative feedback mechanism where the ultrasonic logging tool repeatedly measures waveforms, updates trajectory position and wave velocity estimates, and recalculates geometric parameters until convergence criteria are met. This feedback loop continuously refines measurement accuracy by compensating for eccentricity and environmental variations.

The patent dynamically adjusts measurement parameters including wave velocity estimates, trajectory coordinates, and geometric model parameters based on observed waveform characteristics. By allowing these parameters to change and converge through iteration, the system adapts to varying fluid properties, temperature, and pressure conditions.

The patent performs preliminary actions by establishing an initial trajectory model and wave velocity estimate before actual measurement begins. This preliminary framework provides a starting point for iteration, reducing the computational burden during the optimization process and guiding the search toward the correct solution more efficiently.

The patent applies partial iteration by performing a limited number of optimization cycles based on convergence criteria. Rather than exhaustively optimizing all parameters to maximum precision, the system performs sufficient iterations to achieve acceptable accuracy while avoiding excessive computational complexity.