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DE2125154A1
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Recording power meter - for mutisheave block and tackle cables esp in well boring
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DE1936322A1
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Device for adjusting the rods of deep pumping systems during operation
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DE1583836B1
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Polishing rod clamp for deep pump systems and socket wrench for actuating the polishing rod clamp
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DE1284381B
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Method and device for measuring and recording the work done by pulley ropes, especially in deep drilling rigs
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DE1648255A1
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Temperature measuring device with registration device for use in hard-to-reach places, e.g. in deep oil wells
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DE1215084B
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Device for observing and registering the processes in deep pumps, especially in oil production probes
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DE1217901B
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Polishing rod hangers for deep pump systems
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DE1102424B
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Direct writing recorder like an indicator
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DE1037205B
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Device for the destruction of excess forces for recorders u. like
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CA650259A
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Dynamometers for deep well pump installations
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CA900843A
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Apparatus for setting of rods for deep well installations
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CA890550A
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Apparatus for measuring labor
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