Steel Catenary Riser Response Characterization With On-Line Monitoring Devices

Karayaka, Metin; Ruf, Wolfgang; Natarajan, Shreenaath

doi:10.1115/omae2009-79437

“…The sensors placed at the Touchdown Region increases the resolution of VIV characterization. A technique to obtain an optimum instrumentation locations and the number required is discussed in [6], [7] and [8].…”

Section: Characterization Of Viv Induced Riser Motionsmentioning

confidence: 99%

Tahiti Online Monitoring System for Steel Catenary Risers and Flowlines

Karayaka

¹

,

Chen

²

,

Blankenshipp

³

et al. 2009

Proceedings of Offshore Technology Conference

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The Riser and Flowline Monitoring (RFM) project deployed one of the most comprehensive subsea structural monitoring systems to date on a Tahiti infield (production) Steel Catenary Riser (SCR) and associated flowline. State-of-the-art motion and strain measurement devices are optimally placed along the SCR to continuously measure and store real-time full scale riser response. In addition, RFM project is the first to implement monitoring devices on a flowline to measure the flowline buckling, a phenomenon that is predicted during repeated start up/shut down. The project goals are two-fold:1. Understand fundamental hydrodynamic behavior of SCRs and flowlines, specifically, floater motion induced response of catenary risers, Vortex Induced Vibration of catenary risers, riser behavior at the pull tube exit region, riser-soil interaction at the touchdown region, flowline buckling, flowline axial walking, and flow assurance characteristics of infield flowlines. The information generated will be used in future riser designs.2. The information will be used to validate Tahiti riser and flowline system robustness and conduct "health checks" on the fatigue critical risers and flowlines, particularly after significant environmental or operational events. This paper describes the monitoring system configuration, the technology deployed, and the installation methods.

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“…A technique to obtain an optimum instrumentation locations and the number required is discussed in [6], [7] and [8]. In principle, to capture the VIV response, spatial extent of the instrumentation should enable to capture at least a quarter wave length of the shape of lowest mode number expected.…”

Section: Characterization Of Viv Induced Riser Motionsmentioning

confidence: 99%

SS: Tahiti On-Line Monitoring System for Steel Catenary Risers and Flowlines

Karayaka

¹

,

Chen

²

,

Blankenshipp

³

et al. 2009

Self Cite

View full text Add to dashboard Cite

The Riser and Flowline Monitoring (RFM) project deployed one of the most comprehensive subsea structural monitoring systems to date on a Tahiti infield (production) Steel Catenary Riser (SCR) and associated flowline. State-of-the-art motion and strain measurement devices are optimally placed along the SCR to continuously measure and store real-time full scale riser response. In addition, RFM project is the first to implement monitoring devices on a flowline to measure the flowline buckling, a phenomenon that is predicted during repeated start up/shut down. The project goals are two-fold:1. Understand fundamental hydrodynamic behavior of SCRs and flowlines, specifically, floater motion induced response of catenary risers, Vortex Induced Vibration of catenary risers, riser behavior at the pull tube exit region, riser-soil interaction at the touchdown region, flowline buckling, flowline axial walking, and flow assurance characteristics of infield flowlines. The information generated will be used in future riser designs.2. The information will be used to validate Tahiti riser and flowline system robustness and conduct "health checks" on the fatigue critical risers and flowlines, particularly after significant environmental or operational events. This paper describes the monitoring system configuration, the technology deployed, and the installation methods.

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“…6,7 During the vibration testing, various parameters are collected by sensors, and then the data are processed with an intelligent algorithm, which could determine the status of offshore platform and give the appropriate measures. [8][9][10] The information of sensor is generally transmitted by wires. However, the wire acquisition system for offshore platforms utilizes numerous wires and makes the cabling very difficult.…”

Section: Introductionmentioning

confidence: 99%

Design and validation of a fast wireless low-frequency vibration inspection system for offshore platform structures

Zhou

¹

,

Yu

²

,

Wang

³

et al. 2019

Journal of Low Frequency Noise, Vibration and Active Control

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Structural health monitoring has become increasingly important in the effective evaluation of structural health conditions and the maintenance service of structures. The validity and convenience of obtaining sensor data are critical for data mining, feature extraction, and condition assessment. A fast wireless low-frequency vibration inspection system (FWLVIS) based on wireless sensor networks for offshore platform structural vibration inspection is presented in this paper. The designed system consists of intelligent acquisition equipment and eight wireless nodes with low-frequency acceleration sensors, while the entire system has 64 collection channels. The wireless nodes integrated with a vibration sensing unit, an embedded low-power micro-processing unit, a wireless transceiver unit, and a large-capacity power unit perform functions, which could perform data collection, initial analysis, data storage, and wireless transmission. The intelligent acquisition equipment integrated with a high-performance computation unit, a wireless transceiver unit, a mobile power source, and the embedded data analysis software could completely control the multi-wireless nodes, receive and analyze the data, and implement the parameter identification. Experiments are performed on a single pendulum, and then on an offshore platform model is constructed to verify the FWLVIS. The experimental results show that the system has the following characteristics: fast arrangement, high sampling rate, high resolution, and capacity for low-frequency inspection. Thus, the system has good application prospects and practical value in the field of structural health monitoring and non-destructive inspection.

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Steel Catenary Riser Response Characterization With On-Line Monitoring Devices

Cited by 11 publications

References 4 publications

Tahiti Online Monitoring System for Steel Catenary Risers and Flowlines

Tahiti Online Monitoring System for Steel Catenary Risers and Flowlines

SS: Tahiti On-Line Monitoring System for Steel Catenary Risers and Flowlines

Design and validation of a fast wireless low-frequency vibration inspection system for offshore platform structures

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