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PRODUCTION TECH INT

US3 patents

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US4716960AJan 5, 1988

Method and system for introducing electric current into a well

PRODUCTION TECH INT484 citations98

US5207273AMay 4, 1993

Method and apparatus for pumping wells

PRODUCTION TECH INT371 citations95

US4861074AAug 29, 1989

Tubing collar

PRODUCTION TECH INT36 citations90