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  2. Ultrasonic/sonic driller/corer - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic/sonic_driller/corer

    The Ultrasonic/Sonic Driller/Corer (USDC) is a drilling device that uses vibrations in order to hammer its bit through materials, as opposed to traditional drilling methods. The drill uses a piezoelectric actuator as its source of power, and utilizes a variety of 'horns' to vibrate, or hammer, its bit through the material.

  3. Theory of sonics - Wikipedia

    en.wikipedia.org/wiki/Theory_of_sonics

    A sonic drill head works by sending high frequency resonant vibrations down the drill string to the drill bit, while the operator controls these frequencies to suit the specific conditions of the soil/rock geology. Torque Converter. [4] A mechanical application of sonic theory on the transmission of power by vibrations.

  4. Ultrasonic welding - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_welding

    Ultrasonic welding of thin metallic foils. The sonotrode is rotated along the weld seam.. Ultrasonic welding is an industrial process whereby high-frequency ultrasonic acoustic vibrations are locally applied to work pieces being held together under pressure to create a solid-state weld.

  5. Well logging - Wikipedia

    en.wikipedia.org/wiki/Well_logging

    Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).

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  7. Today’s NYT ‘Strands’ Hints, Spangram and Answers for Sunday ...

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    Find theme words to fill the board. Theme words stay highlighted in blue when found. Drag or tap letters to create words. If tapping, double tap the last letter to submit.