4. Wells
  5. Processes
  6. Operating valve, closure, or changeable restrictor in a well

Tianping Huang

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Composition and method for diversion agents for acid...

Wells – Processes – Specific low fluid loss feature for fluid attacking formation
Reexamination Certificate

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Compositions and methods for water and gas shut-off in...

Earth boring – well treating – and oil field chemistry – Well treating – Contains inorganic component other than water or clay
Reexamination Certificate

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Concentrated suspension of particulate additives for...

Wells – Processes – Placing fluid into the formation
Reexamination Certificate

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Downhole gap sealing element and method

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Fluid loss control agents for viscoelastic surfactant fluids

Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2258953

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