Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1992-12-17
1994-08-23
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 45, 175 73, 405 52, 405128, F16L 100, E21B 704, B09B 100
Patent
active
053402383
ABSTRACT:
A method and apparatus for detecting and localizing a leak from an above-ground liquid storage tank is disclosed. The invention utilizes a fiber optic chemical sensor to sense vapor from the liquid stored in the tank through a plurality of horizontal bores created at spaced intervals through the strata underneath the tank. Each of the plurality of horizontal bores is connected to a vacuum pump and manifold system which delivers the vapor or liquid present in the strata underneath the tank, resulting from diffusion or leakage in the tank, to the fiber optic chemical sensor. The horizontal bores are created with the use of a pilot which protects the bottom of the tank from punctures and ensures that the bores lie in close proximity to the bottom of the tank, enabling the detection of leaks in the tank as they develop. A seal and conduit assembly is utilized for localization of a leak within the vicinity of a horizontal bore by exposing the vapor or liquid present in an isolated longitudinal section of the bore to the fiber optic chemical sensor.
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Tanknology Corporation International
Taylor Dennis L.
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