4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Terry Melius

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Drilling system and method employing torsional sonic vibration f

Boring or penetrating the earth – Natural vibration characteristic of an element of boring...
Patent

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Dual metal seal for a well safety valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Patent

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Rotary rock bit ball plug

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Profile ID: LFUS-PAI-P-1469898

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