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Tubing joint for corrosion protection
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Ram construction for oil well blow out preventer apparatus
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Rotary blowout preventer
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Wave motion actuated pump
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Wave motion actuated hydraulic pump
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Adjustable jar trip spring
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Safety drilling and fishing bumper sub
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Blowout preventer
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Pressure regulated, straight pull jar mechanism
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Circumorbital cutting tool
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Valve for well testing tools
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Rotary, straight-pull jar assembly
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