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Title:
DUCT SEEPAGE REDUCTION
Document Type and Number:
WIPO Patent Application WO2003093713
Kind Code:
A3
Abstract:
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 = (x<2>L + y <2>L) <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 = (a<2> + b<2> + c<2>) <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.

Inventors:
MCEWAN IAN KENNETH (GB)
CHIRNSIDE IAN BEVERIDGE (GB)
RYAN NICHOLAS JOHN (GB)
Application Number:
PCT/GB2003/001847
Publication Date:
January 08, 2004
Filing Date:
April 29, 2003
Export Citation:
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Assignee:
UNIV ABERDEEN (GB)
MCEWAN IAN KENNETH (GB)
CHIRNSIDE IAN BEVERIDGE (GB)
RYAN NICHOLAS JOHN (GB)
International Classes:
F16L55/16; F16L55/162; F16L55/18; F16L; (IPC1-7): F16L55/162
Foreign References:
US5980984A1999-11-09
US3227572A1966-01-04
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