4. Valves and valve actuation
  5. Balanced valves
  6. Reciprocating

McEvoy Oilfield Equipment Co.

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Control line exiting coupling

Wells – Above ground apparatus – Inner member anchor or seal with lateral port
Patent

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High pressure valve

Valves and valve actuation – Balanced valves – Reciprocating
Patent

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Mechanically operated breech block

Pipe joints or couplings – Frangible element – Score line or groove
Patent

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Run-in and tie back apparatus

Pipe joints or couplings – Frangible element
Patent

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Underwater well completion method and apparatus

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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