METHOD FOR OPERATION OF PIPELINES OF OIL COLLECTION AND RESERVOIR PRESSURE MAINTENANCE OF OIL DEPOSIT Russian patent published in 2016 - IPC C23F13/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to protection of metals against corrosion. Method of repair of pipelines from corrosion protection system of well cluster oil deposit containing installation of cathode protection of wells and tread protection of pipelines, group measuring plant (GMP), cathodic protection station (CPS) and anode earthing electrodes, is characterised by that on GMP body cable lines are mounted with connection to each pipeline and unit of joint protection of pipelines (PJPU), cable terminals are connected to PJPU adjustment plateau, protector protected pipelines through diodes and adjustable resistance is connected to cathode-protected pipelines in PJPU. At that, as CPS, CPSs and anode earthing electrodes are used mounted on well for cathode protection of well casing string with pipeline, cathode-protected pipeline is used as "donor" to provide current protection to other pipelines, protective potential of which has decreased less than minimum allowable -0.9 V or service life of protectors which has passed, record inserts for electric disconnection of pipelines and point of convergence of pipelines, all pipelines are connected to PJPU and adjustment of current protection in pipelines values of protective potentials on which exceed -1.05 V is reduced and redistribution of current protection between pipelines, tread protection is switched off at potential protection of less than -0.9 V potential newly connected pipelines are installed (-0.9)-(-1.05) V, at connection of one of the channels PJPU to point of convergence of pipelines housing and pipelines to bridge potential set approximately of (-0.7)-(-0.8) V and leak currents value is adjusted.

EFFECT: elimination of corrosion of heat-affected zones of pipelines and high degree of anticorrosion protection of pipelines.

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