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Secondary recovery of oil by steam stimulation plus the...

E - Fixed Constructions – 21 – B
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Secondary recovery of oil from wells

E - Fixed Constructions – 21 – B
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Secondary recovery of petroleum

E - Fixed Constructions – 21 – B
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Secondary recovery process

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Secondary recovery process

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Secondary recovery process and surfactant compositions...

E - Fixed Constructions – 21 – B
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Secondary recovery process and surfactant compositions...

E - Fixed Constructions – 21 – B
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Secondary recovery process using surfactant mixtures

E - Fixed Constructions – 21 – B
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Secondary recovery process utilizing brine electrolyzed to...

E - Fixed Constructions – 21 – B
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Secondary recovery process utilizing water saturated with gas

E - Fixed Constructions – 21 – B
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Secondary recovery using carbon dioxide

E - Fixed Constructions – 21 – B
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Secondary recovery using carbon dioxide and an inert gas

E - Fixed Constructions – 21 – B
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Secondary recovery using mixtures of carbon dioxide and...

E - Fixed Constructions – 21 – B
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Secondary release mechanism for fluid actuated couplings

E - Fixed Constructions – 21 – B
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Sectional drive system

E - Fixed Constructions – 21 – B
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Securing a composite bridge plug

E - Fixed Constructions – 21 – B
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Securing arrangement for reamers in raise boring

E - Fixed Constructions – 21 – B
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Sediment evacuator for a liquid flow duct having a low point

E - Fixed Constructions – 21 – B
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Segment for a core drill bit and method of manufacture

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Segmented concentric centralizer

E - Fixed Constructions – 21 – B
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