The developments in pipeline isolation systems have evolved from the now outdated umbilical operated tools that were operated through penetrations in the pig trap doors with strippers. This method has great limitations both with respect to safety and operations. The development of remotely operated (tether less) tools (SmartPlugs) was initiated by PSI in the mid 90's, and in 1999 that the world first successful operation took place at the Dimlington Gas terminal in UK. The communication is based on Extremely Low Frequency electromagnetic waves, where digital signals are converted to suitable telegrams for transmission through the pipeline wall as well as any coating or burial mass. This paper presents the remote controlled pipeline isolation system and describes the function and operation of each main sub-system. Further, experience from field operations is presented and discussed, together with a presentation of new challenging commitments made for the Plug system.
The smart plug: A remotely controlled pipeline isolation system
2001
8 Seiten
Conference paper
English