METHOD TO RESTORE PIPELINE, DEVICE FOR PLUGGING AND COATING OF PIPELINE, METHOD AND DEVICE FOR ITS CLEANING Russian patent published in 2012 - IPC F16L58/04 

FIELD: construction.

SUBSTANCE: method of coating includes application of a coating composition (hereinafter - composition) onto an inner surface of a pipeline. The composition is moved in a cavity formed by two sleeves. Sleeves are blown to pipeline walls, the composition is injected into the pipeline cavity between the sleeves. The sleeve to the next section of the pipeline is moved by reversing from the previous section. The method is carried out with a device comprising two sleeves laid into a pipeline, a tore, a nozzle. Sleeves form cavities communicated with systems of fluid agent supply by bent ends. The cavity formed by sleeves is communicated with a system of composition supply. The end of the sleeve is bent and connected with a flexible link laid into the sleeve. The second end of the flexible link is connected with a traction mechanism. The end of the sleeve is fixed along a nozzle perimetre. The nozzle cavity is communicated with the composition supply system, which is moved between the tore and the sleeve. The tore with the flexible link is connected with the traction mechanism. The method of cleaning consists in displacement of a sleeve, gas supply into a cavity, formed by a bent section of a sleeve. Gas from the cavity is released into the pipeline, where water is additionally supplied. Releasing the rope, the sleeve with the water flow is moved to the new section of cleaning.

EFFECT: simplified technology of pipeline restoration.

6 cl, 14 dwg