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CA2670048A1
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Mechanism for adjusting the circumference of scraper cups or discs
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CA2637286A1
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Appatatus with control linkage for re-suspending solids in fluid in a tank
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Self-powered nozzle assembly with hydraulic dampener
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Noise generating pipeline pig
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Pipeline pig for detecting an obstruction in a pipeline and method
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Pig for measuring interior diameter changes in a pipe
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Method of repairing a pipe using a pre-stressed sleeve
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Tank cleaning apparatus
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A pig for detecting an obstruction in a pipeline
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Layered scraper cup
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Pipeline pig cleaning apparatus
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Layered scraper cup (lsc)
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Expandable jetting scraper cup
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A pig for detecting an obstruction in a pipeline
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A pig for detecting an obstruction in a pipeline
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CA1300525C
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Vapour plug for temporarily sealing a pipeline
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US4634040A
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Process for welding pipe ends and an insulating ring therefor
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