RU1782237C
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Process for producing modified surfactants
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RU1770556C
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Bottom-hole treatment composition
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Bottom-hole zone treatment composition
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Universal cementing plug
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RU1776766C
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Plugging-back gelling mud
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SU1763719A1
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Submerged multistage centrifugal pump
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SU1747685A1
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Device for measuring the pressure and temperature in oil wells
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Method of acid treatment of formation
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Method of determination of petroleum products emulsified in water
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Water-in-oil emulsion for killing and completion of wells
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Method for reducing downhole water influx
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SU1760095A1
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Foam-forming compound for removing liquid from well bottom
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Method of control of seam acidization efficiency
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Device for preparation and development of wells
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Method for chemically treating drilling mud
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Hydraulic cyclone
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Drilling bit
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Gas lift
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SU1731931A1
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Rotary drilling bit
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SU1646739A1
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Device for forming back side of weld joint
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