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

Davis-Lynch, Inc.

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Anti-rotational cementing apparatus

Wells – Pistons – fluid driven into well – With stop
Patent

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Apparatus and method for re-entering and cementing an underwater

Wells – Submerged well – Connection or disconnection of submerged members remotely...
Patent

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Apparatus for cementing a casing string

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Casing centralizer

Wells – Guide for device or conduit – On sucker or pump rod
Patent

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Casing lined oil or gas well

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

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