Duct seepage reduction

Details Duct seepage reduction Duct seepage reduction

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/162 (2006.01) F16L 55/16 (2006.01)

Patent

CA 2485180

The present invention concerns a method for reducing seepage through a leak (5) in a duct (1), the leak being defined in terms of its maximum dimension xL and its maximum width in an orthogonal direction yL and the effective size of the leak being given by formula (1): SL = (x2L + y 2L)1/2 . A plurality of sealing elements (3) are introduced into the duct, the sealing elements having dimensions a, b and c in mutually orthogonal directions and the effective size SE of the sealing element being given by formula (2) : SE = (a2+ b2 + c2) 1/2. The sealing elements have an effective size SE, which is less than the effective size of the leak SL, so that sealing elements (3A) are drawn to the leak locality and caused, by reason of a pressure differential at that locality and attributable to the leak, to move over the leak and reduce the seepage.

L'invention concerne un procédé permettant de réduire la percolation due à une fuite (5) dans un conduit (1), la fuite étant définie en termes de dimension maximale x<SB>L</SB> et de dimension minimale dans une direction orthogonale y<SB>L</SB> et la taille effective de la fuite étant donnée par (1). Une pluralité d'éléments d'étanchéité (3) sont introduits dans le conduit, les éléments d'étanchéité présentant des dimensions a, b et c dans des directions mutuellement orthogonales et la taille effective S<SB>E</SB> de l'élément d'étanchéité étant donnée par (2). Les éléments d'étanchéité ont une taille effective SE qui est inférieure à la taille effective de la fuite SL, de sorte que les éléments d'étanchéité (3A) soient entraînés en direction du point de fuite et soient déplacés au-dessus de la fuite et réduisent la percolation, sous l'effet d'une pression différentielle en ce point et imputable à la fuite.

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