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US4022273A
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Bottom hole flow control apparatus
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US3981360A
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Well tubing drain
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US3698477A
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Running-in tool for wells
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US3667505A
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Rotary ball valve for wells
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US3584645A
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Flow control valve for wells
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US3568768A
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Well pressure responsive valve
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US3550444A
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Apparatus for testing a well without interrupting flow therefrom
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US3454092A
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Down hole self-adjusting tubing anchor
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US3477507A
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Well safety valve
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US3497004A
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Tubing to tubing flow controlling retrievable sub-surface valve
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US3448802A
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Apparatus for well completion,cementing,circulating and production
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US3454091A
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Down hole self-adjusting tubing anchor
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US3426847A
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Final flow period sample capturing tool
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US3455381A
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Packer holddown and release apparatus
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US3473606A
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Pre-charged pressure responsive safety valve
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US3358767A
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Multi-shut-in tool
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CA916046A
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Flow control valve for wells
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