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GB900511A
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Cross-over apparatus for use in oil and gas wells
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US3074485A
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Latch for retrievable valves or the like
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US2970648A
|
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Crossover apparatus for oil and gas wells
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US2846014A
|
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Landing nipple for well tubing
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GB764561A
|
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Offset mandrel containing a flow control device for small diameter well tubing
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US2824525A
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Offset mandrel for small diameter tubing
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US2679903A
|
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Means for installing and removing flow valves or the like
|
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US2679904A
|
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Means of installing and removing flow valves or the like
|
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US2672827A
|
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Gas lift valve mechanism
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US2664162A
|
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Means for installing and removing flow valves
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