Kitada, Kazuya et al. (2010): Drill pipe monitoring of vortex-induced vibration during IODP Expedition 332 observatory installations

Leg/Site/Hole:
IODP 319
IODP 332
IODP 314 C0002
IODP 315 C0002
IODP 326 C0002
IODP 332 C0002
IODP 338 C0002
IODP 319 C0010
IODP 332 C0010
Identifier:
2012-018516
georefid

10.2204/iodp.proc.332.106.2011
doi

Creator:
Kitada, Kazuya
Japan Agency for Marine-Earth Science and Technology, Institute for Research on Earth Evolution, Yokohama, Japan
author

Araki, Eiichiro
Japan Agency for Marine-Earth Science and Technology, Japan
author

Kimura, Toshinori
Pennsylvania State University, United States
author

Kinoshita, Masataka
University of Alaska-Fairbanks, United States
author

Kopf, Achim
University of Bremen, Germany
author

Hammerschmidt, Sebastian
author

Toczko, Sean
author

Saruhashi, Tomokazu
author

Sawada, Ikuo
author

Kyo, Masanori
author

Namba, Yasuhiro
author

Kido, Yukari
author

Saffer, Demian M.
author

Lauer, Rachel
author

Wheat, C. Geoffrey
author

Identification:
Drill pipe monitoring of vortex-induced vibration during IODP Expedition 332 observatory installations
2010
In: Kopf, Achim, Araki, Eiichiro, Toczko, Sean, Kido, Yukari, Hammerschmidt, Sebastian, Kimura, Toshinori, Kitada, Kazuya, Lauer, Rachel, Saffer, Demian M., Wheat, C. Geoffrey, Proceedings of the Integrated Ocean Drilling Program; NantroSEIZE Stage 2; riserless observatory; Expedition 332 of the riser drilling platform; Shingu, Japan, to Minami-Ise, Japan; Sites C0002 and C0010; 25 October-11 December 2010
IODP Management International, Washington, DC, United States
332
This study reports on vortex-induced vibration (VIV) suppression methods for long-term borehole monitoring system (LTBMS) installation in areas of strong ocean currents such as the Kuroshio Current. One of the primary challenges in installing the LTBMS was to deploy high-precision, sensitive sensors into the borehole without damaging them during their trip through the water column. Two field tests were performed using accelerometers attached to the instrument carrier and/or drill pipes to collect data on the characteristics and effects of drill pipe VIV. These tests demonstrated that vortex suppression can be achieved by using drill collars and attaching ropes to the drill pipe. Therefore, these methods were applied to the drill pipe (above the sensor assembly) for the actual recovery and installation of the observatory systems during the Integrated Ocean Drilling Program (IODP) Expedition 332. From the observations and data collected over a period of several days of VIV monitoring during the LTBMS installation and SmartPlug retrieval, the following three points can be made regarding VIV suppression: (1) the bottom-hole assembly should be lowered in the low-current area, with the relative current speed being as low as possible, (2) the drifting speed should be kept well below 1 kt, and (3) the drifting angle between drifting direction and sea current should be kept as small as possible (definitely <45 degrees ). The results of VIV monitoring during Expedition 332 attest that the amplitude was further reduced to <0.5 g, eventually contributing to the success of the first LTBMS installation at IODP Site C0002.
Coverage:Geographic coordinates:
North:33.1800
West:136.3800East: 136.4112
South:33.1236

Engineering geology; Asia; continental margin; drilling; Expedition 319; Expedition 332; Far East; Honshu; Integrated Ocean Drilling Program; IODP Site C0002; IODP Site C0010; Japan; Kii Peninsula; marine drilling; monitoring; Nankai Trough; NanTroSEIZE; North Pacific; Northwest Pacific; Pacific Ocean; preventive measures; vibration; vorticity; West Pacific;

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