Method and device for internally locating and sealing pipeline leaks
Patent
·
OSTI ID:6796785
A method and a device are described for internally locating leaks in a pipeline and sealing the leak without interrupting the normal use of the pipe. The device has a tubular rigid body which is open at both ends and is covered on the outside by an inflatable sleeve which can be pressurized to seal off a liquid-tight cavity between the pipe wall and the sleeve surface. The pipe is tested for leaks by pressurizing the cavity with a test liquid and thereafter observing the pressure drop to determine if a leak is present. If a leak is discovered, a settable liquid sealant is forced into the cavity filling the leak. (3 claims)
- Assignee:
- Minnesota Mining and Mfg. Co.
- Patent Number(s):
- US 3762446
- OSTI ID:
- 6796785
- Country of Publication:
- United States
- Language:
- English
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