4. Geometrical instruments
  5. Indicator of direction of force traversing natural media
  6. Magnetic field responsive

Bernard R. Zuvela

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Change in length of drill string containing an instrument

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
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Change in length of drill string while instrument remains therei

Boring or penetrating the earth – Processes
Patent

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Direction responsive flux gate unit

Geometrical instruments – Indicator of direction of force traversing natural media – Magnetic field responsive
Patent

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Inclination and direction responsive apparatus

Geometrical instruments – Indicator of direction of force traversing natural media – Diverse directional indicator
Patent

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Lengthening drill string containing an instrument

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
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Profile ID: LFUS-PAI-P-441721

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