System and methods for distance determination within a borehole

By utilizing radar and acoustic signals transmitted through a waveguide, the system effectively addresses the challenge of accurately determining borehole depth and standoff distance, enhancing the efficiency and safety of MMWD operations.

WO2025064153A2 Publication Date: 2025-03-27QUAISE ENERGY INC
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Patent Information

Application Number
PCT/US2024/043654
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-20
Filing Date
2024-08-23
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Conventional drilling methods face challenges in accurately determining the depth and standoff distance within a borehole, especially in deep, hot environments where traditional sensors may fail due to elevated temperatures.

Method used

The system employs radar and acoustic signals transmitted through a waveguide within the borehole to determine the depth and standoff distance. This involves using a frequency-modulated continuous wave radar (FMCWR) and acoustic pressure signals to calculate the time of flight differences and subsequently determine the distances.

Benefits of technology

This method allows for accurate and efficient measurement of borehole depth and standoff distance without the need for additional diagnostic equipment or halting drilling operations, thereby enhancing the efficiency of millimeter-wave drilling (MMWD) and reducing the risk of equipment damage.

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Abstract

Systems and method are provided herein for performing MMWD using a gyrotron to provide electromagnetic waves into a borehole via a waveguide during borehole formation. Borehole depth and a distance between the waveguide and the bottom of the borehole can be determined using radar or acoustic signal processing techniques. The radar and acoustic signal sources can be configured to transmit measurement signals into the waveguide simultaneously with the electromagnetic waves transmitted by the gyrotron thereby eliminating the need for downhole sensing equipment and eliminating the need for drilling operation downtime to perform diagnostic depth measurements.
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