Development of ROV Trencher URI-T and its Sea Trial

We developed a heavy-duty work class ROV trencher named URI-T (Underwater robot it's trencher) that can conduct burial and maintenance tasks for underwater cables and small diameter pipelines. It requires various supporting systems, including a dynamic positioning (DP) vessel, launch and recovery system (LARS), A-frame, and winch in order to perform burial tasks because of its dimensions (6.5 m × 5.0 m × 4.5 m, 20 t) and the tough working environment. However, operating a DP vessel has disadvantages as it is expensive to rent and operate and it is difficult to adjust the working schedule for some domestic coast construction cases. In this paper, we propose a method using a barge instead of a DP vessel to avoid the above disadvantages. Although burying the cable and pipeline using a barge has lower working efficiency than a DP vessel, it can save construction expenses and does not require a large crew. The proposed method was applied over two months at the construction of the water supply in Yokji-do, and the results were verified.

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“…Table 2 URI-T's specifications (Kang et al, 2019) in the worst case, loss of the ROV trencher. therefore be a good alternative to a DP ship.…”

Section: Operation Of the Rov Trencher Using A Bargementioning

confidence: 99%

“…commercial results by introducing the ROV trenchers on-site. As described above, the URI-T is an ROV trencher that buries and maintains cables and pipelines using water jetting and various work tools at depths of up to 2,500 m; it is 6.6 m (L) × 4.5 m (W) × 3.5 m (H) and weighs approximately 21 tons (Kang et al, 2019;Cho, et al, 2019a).…”

mentioning

confidence: 99%