4. Pipes and tubular conduits
  5. Flexible
  6. Joined sections

Drilling Development, Inc.

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Apparatus for drilling straight portion of a deviated hole

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Flexible drill pipe

Pipes and tubular conduits – Flexible – Joined sections
Patent

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Survey tool string

Wells – Receptacles – Lateral ports used in well
Patent

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