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

Hughes Tool Company

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Actuator for a hydraulic impact device

Tool driving or impacting – Impacting devices – With means to cause or control advance of hammer head
Patent

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Adjustable collet

Wells – Central chamber sealed with respect to prepositioned...
Patent

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Anchor seal assembly

Wells – Processes – Placing or shifting well part
Patent

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Annulus operated test valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Annulus valve

Wells – Above ground apparatus – Inner member anchor or seal with valve
Patent

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Profile ID: LFUS-PAI-P-7681

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