METHOD FOR CUTTING OUT PIPELINE SEGMENT Russian patent published in 2014 - IPC F16L1/24 

FIELD: transport.

SUBSTANCE: invention relates to pipeline transportation, namely to methods for cutting out pipeline segment, and can be used during oil pipeline repair by defective pipeline segment replacement. According to the proposed method, bridging pieces are installed on pipeline which bridging pieces are copper cables with cross-sectional area not less than 16 mm² and connect not cut out pipeline segments with each other and also with the segment being cut out. At the ends of cut out pipeline segment, grounded fireless pipe-cutting machines are mounted. After this, pipeline is cut simultaneously at all ends of segment by cutting machines with rotational speed of cutting tools not exceeding 60 rpm and with radial movement of cutting tools at speed not exceeding 30 mm/min. In this process of pipeline cutting, wedges made of intrinsically safe material are driven at intervals of 250-300 mm in formed incisions, and cut out pipeline segment is supported by means of cargo lifting device.

EFFECT: simplification of method implementation, improving its efficiency and safety, higher quality of cutting.

3 cl, 1 dwg