Pipe repair and the methods for operational fixing and definitive welding thereof
AssigneesEndserv InspecãO De Equipamentos E Materiais Ltda, Petroleo Brasileiro S.A. - Petrobras
InventorsFABIO CORREIA Do Rosário, TATYANA SORIANO De Oliveira
Life of this patent
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Abstract
The present invention relates to the repair of pipes, comprising a two-part ring fixed initially by a compression unit which allows the execution of longitudinal welding in order definitively to fix the two-part ring, via apertures, before the compression unit is removed. The two-part ring will be completely welded to the pipe, especially in regions close to connections, but it is necessary for the two-part ring to be fixed initially by the compression unit for the purpose of shaping and definitive geometry of the ring relative to the pipe, normalization of fluid conveyance and in order that it is possible for welding to be planned for the opportune moment.
Claims10
Pipe repair system by compression of split sleeves with sealant against the outer surface of the pipe, comprising a split ring (1) with total thickness corresponding to the sum of the thickness of the channel (2) of accommodation of the sealant (8), plus the thickness of the back (3), which is equivalent to the back plate, and plus the extension (19) with the thickness for welding (4) and total width (5) of the split ring (1), which is the sum of the width of the channel (6) to accommodating the sealant (8) and the two lateral widths (7), being the portions of the split ring initially attached to the pipe by the compression unit (9), made by two hollow rectangular pieces, forming apertures (10), built to allow the welding areas, which correspond to the fitting region (15) of the parts of the split ring (1), can be accessible to the welding, interconnected by chains (12), the compression being made by a connector which will approximate the chains (12) of the compression unit (9) with a single screw (11) with the aid of guide pins (20) so that the compressive force exerted by the screw (11) is only in the direction of the tightening, preventing the screw (11) from damaging.
Method of fixing the pipe repair system in the pipelines while in operation wherein the fitting region (15) of the parts of the split ring (1) is in condition to be filled with solder, via apertures (10), before the compression unit (9) is removed.
Dependencies are inferred from the claim text.