4. Fluid handling
  5. Self-proportioning or correlating systems
  6. Self-controlled branched flow systems

Walter R. Chapman

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Cement through side pocket mandrel

Wells – Cementing device
Reexamination Certificate

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Intake valve for air compressors and the like

Valves and valve actuation – Reciprocating valve – Particular head and seat cooperation
Patent

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Mono-trip cement thru completion

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Mono-trip cement thru completion

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Mono-trip cement thru completion

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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