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US3703467A
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Vertical separator for drilling fluids
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US3703477A
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Corrosion inhibitor containing sulfurized tall oil
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US3712373A
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Multi-layer well screen
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US3670813A
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Pontoon structures in man-made lake for arctic operations
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US3695351A
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Suspending casing through permafrost
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US3641961A
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System for lowering a subsea device from a vessel
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US3616858A
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Method for plugging gas zones with silicone foams
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US3587743A
|
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Explosively fracturing formations in wells
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US3586107A
|
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Carbon dioxide slug drive
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US3677342A
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Method of increasing size of underground nuclear chimney
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US3570601A
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Recovery of oil with viscous propane
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US3617221A
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Procedure for cooling down sulfur plant for inspection
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US3594317A
|
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Well drilling method using decanol in place of oil in aqueous drilling fluids
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US3572434A
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Pressure opened circulating sleeve
|
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US3583481A
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Down hole sidewall tubing valve
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US3559731A
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Pump-off controller
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US3554281A
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Retrievable circulating valve insertable in a string of well tubing
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US3719606A
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Microemulsion of increased viscosity for improved oil recovery
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FR2015092A1
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Anti-corrosion material comprising a zinc chloride - complex of a salt of an amine and an organic acid
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GB1244779A
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Drilling fluid
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