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Apparatus for sealing a tubing string in a high pressure wellbor

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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Check enhancer

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Reexamination Certificate

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Check enhancer for injecting fluids into a well

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Reexamination Certificate

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Polished rod stuffing box with safety valve for a beam pumped pr

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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Rotary blowout preventer adaptable for use with both kelly and o

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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Wellbore circulation system

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Reexamination Certificate

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Wellhead stuffing box for polished rod and accessories for same

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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Wellhead valve removal and installation tool

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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Wellhead with safety valve for pumping well

Wells – Above ground apparatus – Having retractable pipe section to allow closing of gate...
Patent

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