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Convenient-to-clean petroleum sieve pipe auxiliary device
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Novel spray head structure for improving oil well yield
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Crude oil screening flow of inclined screen type sealed screening device
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Sealing type high-sulfur-bearing oil stoste sand removing device
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High-sulfur petroleum stock solution sealing and screening device
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Pressure jetting mechanism for down-hole gas production
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Oil well water injection oil extraction method
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Method for removing sand from sulfur-bearing oil concentrate in airtight sand removal device
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CN104984578A
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Auxiliary filtering technology of petroleum sieve tube auxiliary device
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CN104989346A
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Secondary oil recovery method
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CN104987876A
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Closed filtering device for screening petroleum stock solution containing sulfur
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CN104989300A
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Separation device for purifying petroleum drilling fluid
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Heat insulation petroleum pipe
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CN104989908A
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Connector of petroleum pipeline
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CN104989319A
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Cementing method based on continuous cementing mode in petroleum exploration
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CN104989285A
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Drilling rod travel limiting structure having alarm function
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CN104989284A
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Translation apparatus of petroleum drilling machine
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CN104989305A
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Drilling tool clamping member having firm clamping function
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CN104989886A
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Petroleum pipeline
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Spraying fluid feeding type rapid petroleum drilling slurry fluid stirring device
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