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  5. With below and above ground modification
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High flow injection anchor

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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Hydraulic pump jack drive system for reciprocating an oil well p

Wells – With below and above ground modification – Above ground actuating means for below ground device
Patent

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Hydraulic pumping unit with a variable speed triplex pump

Wells – With below and above ground modification – Eduction pump or plunger in well
Patent

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Hydraulic well control system

Wells – With below and above ground modification – Above ground actuating means for below ground device
Reexamination Certificate

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Hydraulic wiper plug launcher

Wells – With below and above ground modification – Head for tool – piston or cleaner
Patent

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