METHOD OF REPAIRING PIPELINE BENT LENGTH Russian patent published in 2014 - IPC F16L1/28 F16L55/18 

FIELD: machine building.

SUBSTANCE: bent pipeline length repair comprises opening the trench over the length of stability local loss section, restoring the pipeline load-carrying ability and decreasing stress at faulty section. Restoring the pipeline load-carrying ability, decreasing stress at faulty section and preventing further destruction of pipeline even outside of faulty section at repeated origination of axial forces are performed by cutting the damaged pipeline length. Then, flexible metallic pipeline is drawn into strained length to connect said pipeline to both end of repaired pipeline and installing protective jacket.

EFFECT: lower labour input, simplified process, higher reliability.

1 dwg