4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

David J. Brunnert

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Apparatus and method for drilling with casing

Boring or penetrating the earth – Boring without earth removal – Drive point detached from shaft to form cased bore or with...
Reexamination Certificate

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Apparatus and method of drilling with casing

Boring or penetrating the earth – Boring a submerged formation
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Apparatus and method of drilling with casing

Boring or penetrating the earth – Boring a submerged formation
Reexamination Certificate

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Apparatus and methods for drilling a wellbore using casing

Boring or penetrating the earth – Processes – Boring curved or redirected bores
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Apparatus and methods for drilling a wellbore using casing

Wells – Processes – Placing or shifting well part
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Profile ID: LFUS-PAI-P-2344321

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