Abstract
Abstract Internal corrosion and perforation of metal pipelines is the main reason for failure of gathering and transportation pipelines in a western oil field. The content of Cl-in the transport medium of the oilfield is between 24910-118051mg/l, the total salinity is between 65404-39363mg/l, the reduced sulfur content is between 6-36mg/l, and the number of SRBS is between 20-300 /ml, which are the main factors leading to corrosion in the pipeline. Through investigation, demonstration and field test, the internal corrosion control technology system of pipeline has been formed, which includes internal extrusion coating, internal penetration, 32MPa high pressure flexible composite pipe, polyethylene lined FRP composite pipe technology. The internal corrosion control strategy has been popularized in oil field, and the effect is good.
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