METHOD AND DEVICE FOR PREVENTION OF RESIN-PARAFFIN DEPOSITS IN TUBING OF WELLS EQUIPPED WITH SUCKER-ROD PUMPS Russian patent published in 1995 - IPC

Abstract RU 2034979 C1

FIELD: oil drilling practice. SUBSTANCE: cylindrical chamber installed in upper part of sucker rod string is connected by gland rod with pumping jack. Chamber has the form of plunger with spring-loaded return valve positioned above inlet holes. Outlet holes are located in upper end portion of cylindrical chamber. EFFECT: improved functional and operating characteristics. 2 cl, 1 dwg

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RU 2 034 979 C1

Authors

Ivanov V.V.

Levykin V.V.

Dorofeev V.A.

Dates

1995-05-10—Published

1991-06-13—Filed