Method for computing borehole geometry from ultrasonic pulse echo data
Patent 5638337 Issued on June 10, 1997. Estimated Expiration Date: 
August 1, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 1, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of correcting for axial and transverse error components in magnetometer readings during wellbore survey operations Patent #: 5564193 InventorAssigneeApplicationNo. 690776 filed on 08/01/1996US Classes:367/27, Time interval measurement367/28, Amplitude measurement367/73, Synthetic seismograms and models702/6Well logging or borehole studyExaminersPrimary: Moskowitz, NelsonAttorney, Agent or FirmInternational ClassG01V 001/40AbstractA method for using geometrical data to determine characteristics of a wellbore penetrating a subterranean formation is disclosed. The method involves converting data obtained form acoustic well logging into cartesian coordinates and solving a general quadratic equation by a least squares fit to an elliptical or circular model. More specific information, such as tensor strain and formation compaction along the wellbore may then be obtained from the geometrical data.Other References
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