4. Wells
  5. Processes
  6. Placing or shifting well part

Richard Alker

Examiner

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Examiner

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Braking devices for use in drilling operations

Boring or penetrating the earth – With means movable relative to tool to receive – retain – or...
Reexamination Certificate

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Core barrel assemblies with braking devices

Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Receiver removable through below-ground tool shaft
Reexamination Certificate

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Drilling tool

Boring or penetrating the earth – Bit or bit element – Nonsymmetrical bit
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Expandable gage ring

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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External water delivery system for rock drills

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid head on tool shaft having lateral port and axial...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2159667

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