METHOD FOR PROTECTION OF SUCKER ROD STRING AND EXTERNAL SURFACE OF TUBING STRING IN OIL PRODUCING WELLS FROM CORROSION, WAX AND RESIN ACCUMULATION, AND MUTUAL ATTRITION

摘要

FIELD: oil producing industry. SUBSTANCE: method involves running a sucker rod string into the well. The rods are provided with scrapers-centralizers-protectors mounted on the rod body near every cast coupling attachment. The scrapers are cylinders with spiral channels for liquid. They are fabricated from metal of higher electrochemical potential than that of the rod. They are secured on the latter by casting. EFFECT: higher efficiency; higher reliability. 2 cl, 2 dwg