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Surfactant waterflooding process employing surfactant and...

E - Fixed Constructions – 21 – B
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Surfactant waterflooding with graded salinity drive for oil...

E - Fixed Constructions – 21 – B
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Surfactant waterflooding with hydrocarbon slug preceding...

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Surfactants to reduce flood water mobility

E - Fixed Constructions – 21 – B
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Surge anchor assembly

E - Fixed Constructions – 21 – B
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Surge anchor for downhole assembly

E - Fixed Constructions – 21 – B
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Surging fluids downhole in an earth borehole

E - Fixed Constructions – 21 – B
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Survey apparatus and methods for directional wellbore...

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Surveying of a borehole

E - Fixed Constructions – 21 – B
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Surveying of boreholes

E - Fixed Constructions – 21 – B
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Surveying of boreholes using shortened non-magnetic collars

E - Fixed Constructions – 21 – B
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Suspending casing through permafrost

E - Fixed Constructions – 21 – B
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Suspension roof supports

E - Fixed Constructions – 21 – D
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Sustainable method for recovery of petroleum

E - Fixed Constructions – 21 – B
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Swab assembly

E - Fixed Constructions – 21 – B
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Swab cup

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Swab cup

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Swab cup

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Swab cup having an internal reinforcing member

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Swab cup support

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