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US2674034A
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Drill pipe protector apparatus
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US2653545A
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Well installation for subsuraface hydraulic pumps
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US2701615A
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Well bore packer and actuating means therefor
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US2694853A
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Apparatus for removing protectors from pipe
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US2590855A
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Dynamoelectric machine and cooling means
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US2695189A
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Well pipe elevator
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US2650070A
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Pipe gripping mechanism for power tongs
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US2677393A
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Radially expanding bellows
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US2638316A
|
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Power unit for a well pipe slip assembly
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US2687695A
|
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Motor pump
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US2693633A
|
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Transfer apparatus for drill pipe protectors
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US2682102A
|
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Drill pipe protector apparatus
|
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US2705614A
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Power operated pipe tongs
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US2631541A
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Hydraulic pump
|
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US2645120A
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Swivel bail adapter weight sensing device
|
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US2645121A
|
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Weight sensing device
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US2594292A
|
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Side wall sampler
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US2657414A
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Adjustable line wiping device
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US2655679A
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Tandem type pipe wiper
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US2664175A
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Hook locking mechanism
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