Rivestimento anticorrosivo dei tubi. Tubi per tubi (NKTP) e giunti per essi con rivestimento interno in polimero

The line for applying polymer coatings on the inner surface of pipes is designed for coating tubing with a diameter of 60 to 89 mm, as well as linear pipes with a diameter of 89 to 325 mm. Pipes coated with anti-corrosion paint PEP-585 (TU 2329-103-05034239-97) are intended for operation in wells of oil production systems and maintain reservoir pressure at the temperature of the pumped liquid up to 60 ° C. Tubing pipes are completed with couplings (NKT) modernized. Designed for docking steel seamless tubing used for the operation of oil, injection and gas wells. Couplings equipped with elastic sealing rings prevent the formation of hydraulic flows of the pumped medium and the extrusion of sealing grease through the gaps of threaded connections during the operation of tubing suspensions. Protect threaded connections from the effects of corrosive environments, processes of electrochemical corrosion and protect against breaks and damage to the connections of the columns in the wells. Reduce the amount of work in the overhaul of wells associated with non-leaktightness of tubing suspensions. The operational reliability of the coating in corrosive environments is ensured, on the one hand, by the properties of the material itself (strength, hardness, chemical resistance), on the other hand, by the use of advanced technology. Technological process: - thermal degreasing and removal of old coatings in the preburner at a temperature of 390 ° С, which allows to avoid structural changes in the metal; - shot blasting the inner surface of pipes using a highly inert abrasive material based on aluminum oxide; - Pre-heating the pipes to a temperature of 180-200 ° C; coating; - polymerization of the coating at a temperature of 180-200 ° C; - control of the thickness and continuity of the coating. Virtues * The smooth film of the internal coating allows to increase the flow rate of pumped liquids and thereby increases the throughput of the pipe. Thus, the efficiency of a pipe with a diameter of 25 mm with a coating is equal to the efficiency of a pipe with a diameter of 30 mm without a coating. * High adhesion of the coating creates a reliable barrier to the penetration of corrosive media to the metal surface, and an increase in the life of the wells between preventive treatments against paraffin deposits when using tubing coated with anti-corrosion paint P-EP-585 TU 2329-103-05034239-97 is noted.