4. Wells
  5. Submerged well
  6. Wellhead

Ian Douglas Calder

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Apparatus and method for returning drilling fluid from a...

Wells – Submerged well – Wellhead
Reexamination Certificate

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Cuttings injection and annulus remediation systems for...

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

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Rotating drilling head system with static seals

Wells – Above ground apparatus – With seal for reciprocating member
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2559552

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