FIELD: oil and gas industry.
SUBSTANCE: invention refers to cathode protection of flow strings of oil and gas producing wells from underground corrosion. The anode consists of current conductor in a coating on polymer base; also the anode is located in a well between flow and casing strings along the whole length of protected surface of the flow string; in addition, the anode current conductor corresponds to a flexible steel cable made out of corrosion resistant steel in a perforated coating out of elastic heat resistant isolating material; notably, the coating is perforated on all surface along the length of the anode and degree of coating perforation is 10-90%, and growing in proportion to the length of protected surface of the flow string.
EFFECT: development of inexpensive, simple in fabrication and operation anode facilitating high degree of protection of exterior surface of flow strings of well and gas producing wells from corrosion.
2 dwg
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