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BRPI0920939A2
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artificial oil lifting unit using absorbent belts.
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RO120660B1
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Valve block packer for the sand packing of oil-well strainers
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RO113076B1
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Packer with valve assembly used for gravel -packing the filters
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RO112377B1
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Artificial lifting plant for viscous crude-oil from well
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RO112376B1
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Ecologic discharge and treating plant for sludge and layer sand which are resultied from crude-oil wells
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RO111599B
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Equipment for in situ bailing out of the used waters
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