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Displaying records 328 through 328 of 2180
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Title: Cable-operated and self-contained ultrasonic pigs
Category: Pigsource Papers
Downloadable: Yes 
Catalog No.: pg3103e
Date of Publication: 1992
Price: $25.00 US
Authors: Jan A de Raad
Abstract: This paper provides an overview of special ultrasonic pigging systems available from RTD. Cable-operated ultrasonic field-proven tools for distances up to 6000m are described. Current technology enables inspection of pipes with diameters between 8 and 56in. Construction of tools suitable for smaller diameters seems feasible. A brand-new cable-operated ultrasonic riser-pipe inspection system suitable for 20in diameter is mentioned. If used in combination with a hydroplug, gas risers can be inspected. The system provides full circumferential coverage by a swivelling probe system; its first field application is scheduled for early 1992. Cable tools can be propelled either by reversible wheel-driven crawlers, or by differential pressure, as applied for self-contained intelligent pig propulsion. Self-contained liquid-propelled intelligent pigs are used for on-stream inspection of pipelines; a field-tested system (RPIT) to inspect riser pipes is also described.
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