4. Pipe joints or couplings
  5. Frangible element
  6. Score line or groove

Gerald D. Watts

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Downhole expandable casting hanger

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

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Ram bore profile for variable bore packer ram in a ram type...

Valves and valve actuation – Blow-out preventers – Radial reciprocating ram
Reexamination Certificate

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Variable bore ram packer for a ram type blowout preventer

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Variable bore ram packer for tapered tubular members in a...

Seal for a joint or juncture – Seal for well apparatus – For overpressure control device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1747488

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