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US3853175A
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Remotely operated well safety valves
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US3742562A
|
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Well pipe supporting unit
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US3592570A
|
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Reversible fluid-driven motor
|
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US3457605A
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Power slip
|
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GB1189057A
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Spinner Device for Turning a Section of Pipe in Well Apparatus
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US3461974A
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Spinner device for turning well pipe or the like
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US3392609A
|
|
Well pipe spinning unit
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US3390728A
|
|
Well pipe spinner
|
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US3381584A
|
|
Vane type rotary devices
|
|
US3270389A
|
|
Power driven well slip structure
|
|
US3169425A
|
|
Variable size pipe tongs
|
|
US3210821A
|
|
Power slip assembly
|
|
US3099917A
|
|
Kelly bushing
|
|
US3035424A
|
|
Roller drive kelly bushing
|
|
US2904311A
|
|
Kelly bushing centering means
|
|
US2939683A
|
|
Power slip assembly
|
|
US2797895A
|
|
Rotary table master bushings
|
|
US2763468A
|
|
Well drilling master bushing assemblies
|
|
US2591887A
|
|
Movable gripping unit for pipe wrenches
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|
US2520448A
|
|
Oil well tool gripping element
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