Hydrocarbon tank leak detection system
This patent describes a leak detection system for detecting leaks of a liquid hydrocarbon from an underground tank, comprising in combination: at least one riser pipe extending from a point adjacent the bottom of the tank to the surface; communication means for communicating hydrocarbon leaked from the tank to the interior of the riser pipe; a dye which is soluble in hydrocarbon and insoluble in water; a permeable container containing a quantity of the dye; means for lowering the container to the bottom of the riser pipe and retrieving the container to the top of the riser pipe, the dye within the container being exposed to the interior of the pipe for contacting any liquid contained in the pipe, enabling an inspector to periodically pull the container to the surface to determine if any of the dye has dissolved and thus changed the color of the container, indicating leakage of hydrocarbon from the tank.
- Assignee:
- NOV; EDB-89-006675; NOV-89-033504
- Patent Number(s):
- US 4770028
- OSTI ID:
- 6918882
- Country of Publication:
- United States
- Language:
- English
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