ROUTING METHOD OF PARALLEL CYLINDRICAL PIPELINES IN NO-GO TUNNEL WITH CROSS SECTION OF CIRCULAR OUTLINE Russian patent published in 2013 - IPC F16L7/00 

FIELD: machine building.

SUBSTANCE: pipelines are arranged in coaxial holes-lodgements of supporting elements connected to each other with ropes. A formed bank of pipelines is drawn into a tunnel. Traction force is applied to the first and the last supporting elements in the flow direction, which are located at the distance equal to the tunnel length. Number of intermediate supporting elements is one less than the tunnel length divided by length of a bay between adjacent supporting elements. Supporting element is made in the form of a hollow cylinder equipped with rolling elements and end walls. Outer diameter and width of the supporting element are 0.8-0.9 and 0.4-0.5 of diameter of the no-go tunnel respectively. Centres of coaxial holes-lodgements, the diameter of which is 1.05-1.1 of diameter of routed pipelines, are arranged on a circle that is distant by 1.15-1.2 of the pipeline radius with maximum diameter from the circle of end wall of the hollow cylinder of the supporting element.

EFFECT: simultaneous routing of several parallel pipelines; reduction of losses of pulling forces for friction, preservation of pipelines against mechanical damages during their routing and operation; excluding spontaneous movement in the down coming section of the tunnel; possibility of replacing separate pipelines or their whole pack.