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Ram type blowout preventers

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Ram-shear and slip device for well pipe

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Ram-type blowout preventer

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Remotely controlled articulatable hydraulic cutter apparatus

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Remotely controlled hydraulic cutter apparatus

Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent

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Removal of downhole drill collar from well bore

Wells – Means for perforating – weakening – bending or separating pipe...
Reexamination Certificate

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Rotary downhole cutting tool

Wells – Means for perforating – weakening – bending or separating pipe... – Cutter rotates circumferentially of pipe
Patent

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