RU1779798C
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Method of fluid feed from well by gas-lift
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SU1724936A1
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Flying valve for plunger lift
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Downhole fluid level controller
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Device to clean drilling mud
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SU1671776A2
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Installation for hydraulic filling of narrow-section structures
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SU1680752A1
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Drilling mud
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RU1788340C
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Periodic gas-lift recovery of liquid from well into casing
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Method of reducing hydraulic resistance of pipeline
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RU1768524C
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Device for water treatment in the magnetic field
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SU1677265A1
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Gaslift valve
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Ejector-type soil intake device
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SU1606795A1
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Pipeline anchor
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SU1641930A1
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Inventory embankment
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SU1546707A2
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Oil-producing sucker-rod well pumping unit
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SU1569499A1
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Opening ripeline anchor
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SU1565947A1
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Method of washing narrow-profile structure
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Installation for hydraulic deposition of narrow-profile structure
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SU1583591A1
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Valve device for bypassing gas in pumped well
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Arrangement for hydraulic deposition of narrow-profile structures
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SU1703811A1
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Method to determine piezoconductivity of oil bed
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