4. Wells
  5. Packers or plugs
  6. With expanding anchor

William O. Berryman

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Hydraulic fishing jar having tandem piston arrangement

Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Patent

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Subterranean well tool with pressure equalizing release

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-1495962

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