4. Wells
  5. Automatic

Smith International Inc.

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2-Stage underreamer

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent

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Abandonment and retrieval apparatus and method

Wells – Submerged well – Means removably connected to permanent well structure
Reexamination Certificate

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Abnormal torque absorber for drilling

Boring or penetrating the earth – Below-ground impact members
Reexamination Certificate

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Abrasion resistant bearing seal

Cutlery
Patent

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Adjustable bearing assembly

Cutlery
Patent

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