REPAIR PROCEDURE OF PIPE AND TUBE PRODUCTS USED IN PETROLEUM INDUSTRY Russian patent published in 2017 - IPC B08B9/04 F16L55/18 

FIELD: oil and gas industry.

SUBSTANCE: invention falls into the area of the oil and gas producing industry and may be applied at the repairing works of the pipe and tube products of the petroleum industry. In repairing at the pipeline section, 3 holes are dug. The pipe is opened up in the holes. 2 rubber line squibs are placed to the pipe in the middle hole, one line squib is placed to the third hole. The pipe is bundled, sealed and then the guide for lowering the flexible pipe is installed in the pipeline. The operating fluid is run in and the rubber line squibs are pumped through in the middle hole in opposite directions with the output of one line squib in the first hole and shutting down of the second line squib on the pipeline section. In the third hole sideward of the well the third flexible pipe is lowered to the pipeline with the constant circulation of the operating fluid through the flexible pipe. At the shutting down the polluted fluid is extracted to the ditch system. The flexible pipe is laid alternately in both sides of the pipeline with the definition of the meterage of the lowered flexible pipe to achieve the setting, which is determined by the increase of pressure of the flowing operating fluid on the pipeline section with the line squib and with the definition of the fineness of the pipeline section, which does not contain the line squib. The flexible pipe is raised and the guide is dismantled. The pipeline section is cleansed with the operating fluid in the opposite direction from the well with the output of the third line squib to the third hole. The pipeline section, in the place of setting the flexible pipe, is opened up, the pipeline section with the petrified deposits is cut out, the line squib is extracted of it. The pipeline section is replaced to the new section, all the guides for lowering the flexible pipes are dismantled, the integrity is restored and the pipeline is brought into the operation.

EFFECT: invention allows repairing the pipeline virtually of any curvature without drilling out the internal pipeline space.

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