4. Fluid handling
  5. Line condition change responsive valves
  6. Direct response valves

Lubbert Westra

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Ball-type check valve

Fluid handling – Line condition change responsive valves – Direct response valves
Patent

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Ball-type check valve assembly

Fluid handling – Line condition change responsive valves – Direct response valves
Patent

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Seal-sub packer and a setting tool therefor

Wells – Packers or plugs – With expanding anchor
Patent

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Profile ID: LFUS-PAI-P-1125232

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