Inventor
STACHOWIAK JOHN E
US4 patents
Patents
4 patentsUS10107088B2Oct 23, 2018
Centrifugal separator for downhole pump
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Diversion plunger for reciprocating rod pump
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US10450847B2Oct 22, 2019
Subsurface reciprocating pump for gassy and sandy fluids
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US10273762B2Apr 30, 2019
On-off tool for sucker rod string
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