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US3029732A
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Perforation and cleaning of wells
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US2969839A
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Apparatus for forming a closure in a well bore
|
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Pressurizing of wells by gaseous release
|
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US2696259A
|
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Apparatus for firing propellent charges in wells
|
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Well pump filter attachment
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Oil well cementing packer
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Well pipe filter
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Oil well cementing
|
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Cleaning of well perforations
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Method and means for perforating well casings
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Safety detonating device for use in torpedoing oil wells
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Device for indicating tension and length of lines in oil wells
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Means for cutting oil-well casings and drill pipe
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US1734670A
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Means for cementing oil, gas, and water wells
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CA565613A
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Pressurizing of wells by gaseous release
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CA547081A
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Apparatus for firing propellent charges in wells
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