Sealing joints and leaks with an anaerobic liquid

Details Sealing joints and leaks with an anaerobic liquid Sealing joints and leaks with an anaerobic liquid

1984-05-22

1986-04-15

Dawson, Robert A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

2940218, 138 97, 264 36, 285 15, 427140, B32B 3500

Patent

active

045825513

ABSTRACT:
Joints and leaks in pipelines or mains are sealed by injecting into the joint or leak a sealant by means of an expandible tubular pig which is moved endwise through the pipeline or main. The sealant is in the form of an anaerobically curable monomer which cures in the relatively air free conditions in the joint or leak. The pig forms within the pipeline or main an air-free space which communicates with the joint or leak and which is isolated from the fluid in the main. Nevertheless the pig is hollow to permit the flow of fluid therethrough while the joint or leak is sealed. The sealant is injected into the joint or leak by way of the space so that the sealant cures in situ in the joint or leak.

REFERENCES:
patent: 4304805 (1981-12-01), Packo et al.
patent: 4331580 (1982-05-01), Bunyan
patent: 4419163 (1983-12-01), Yamamoto et al.
patent: 4528150 (1985-07-01), Charlebois et al.
patent: 4529008 (1985-07-01), Appleton

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