4. Wells
  5. Expansible anchor or casing

Fred E. Watkins

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Apparatus for measuring bottom hole well conditions

Wells – Expansible anchor or casing
Patent

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Circulating valve for wells

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Fluid injection valve for wells

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Grease injection control head having a specific gas trap

Wells – Above ground apparatus – With seal for reciprocating member
Patent

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High and low tubing pressure actuated well safety valve

Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent

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Profile ID: LFUS-PAI-P-300787

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