4. Boring or penetrating the earth
  5. Below-ground impact members
  6. Fluid-operated

Stig Bakke

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Arrangement in a gripper mechanism for a free pipe/rodlike...

Handling: hand and hoist-line implements – Grapple – Well type
Reexamination Certificate

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Connector and method of use of the connector

Pipe joints or couplings – Packed – Socket
Reexamination Certificate

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Hydraulic cam motor

Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Radially disposed cylinders
Reexamination Certificate

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Hydraulic disconnection device

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Hydraulic jar device

Wells – Processes – Freeing stuck object – grappling or fishing in well
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1150301

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