4. Wells
  5. Packers or plugs
  6. With expanding anchor

Brown Oil Tools, Inc.

Corporate Assignee

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Anchoring assembly

Wells – Packers or plugs – With expanding anchor
Patent

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Apparatus and method for cementing well liners

Wells – Processes – Cementing – plugging or consolidating
Patent

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Check valve assembly

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent

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Check valve assembly

Valves and valve actuation – With correlated flow path – Valve operated by motion of flow path
Patent

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Check valve assembly

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent

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