4. Wells
  5. With eduction pump or plunger
  6. Having sediment trap or deflector

Kenneth Havard

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Device for removing sand from pump plungers

Wells – With eduction pump or plunger – Having sediment trap or deflector
Patent

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Traveling valve for sucker rod pumps

Pumps – Expansible chamber type – Fluid serially moved to opposite side of pumping member
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1819585

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