4. Wells
  5. Guide for device or conduit

James G. Martens

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Centralizer

Wells – Guide for device or conduit
Patent

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Retractable joint and cementing shoe for use in completing a...

Boring or penetrating the earth – Boring a submerged formation
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Smart cementing systems

Wells – Processes – With indicating – testing – measuring or locating
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Surge reduction bypass valve

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Profile ID: LFUS-PAI-P-764334

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