METHOD FOR SANITATION OF PIPELINE Russian patent published in 2021 - IPC F16L55/165 B29C63/36 

FIELD: municipal services; reclamation; oil and gas industry.

SUBSTANCE: invention refers to sanitation of pipelines. Claimed method widens the range of equipment. Method of pipeline sanitation by coating on its inner surface includes introduction into a clean pipeline of a hose and heat-resistant hoses, sleeve is pressed against pipeline wall by pressure of water or air with subsequent polymerisation of polymer binding hose by hot water or steam. Sleeve is made using nonwoven fabric, reinforced with glass-woven fabric and impregnated with polymer binder with possibility of polymerisation by hardening hardeners. Process is started with installation of mounting tower into pipeline, to which sleeve is attached. Hose is turned into the pipeline cavity under pressure of water; at the same time as the hose tail passes into the pipeline cavity heat-resistant hoses are laid. Polymerisation of polymers impregnating the sleeve is carried out by circulating hot water or steam on heat-resistant hoses until temperature inside the sleeve is preferably 90 °C, with further heating of the cavity inside the sleeve within the specified temperature to 8 hours and cooling of the sleeve cavity by circulation of cold water along heat-resistant hoses for at least 24 hours.

EFFECT: task for solution of which is creation of invention consists in simplification of technology of pipeline restoration and expansion of technological capabilities of the method.

9 cl, 1 dwg