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Development and Testing of a Post-Installable Deepwater Monitoring System Using Fiber-Optic SensorsThis paper addresses the design and development of a fiber-optic monitoring system that can be deployed on existing deepwater risers and flowlines; and provides a summary of test article fabrication and the subsequent laboratory testing performed at the National Aeronautics and Space Administration-Johnson Space Center (NASA-JSC). A major challenge of a post-installed instrumentation system is to ensure adequate coupling between the instruments and the riser or flowline of interest. This work investigates the sensor coupling for pipelines that are suspended in a water column (from topside platform to seabed) using a fiber-optic sensor clamp and subsea bonding adhesive. The study involved the design, fabrication, and test of several prototype clamps that contained fiber-optic sensors. A mold was produced by NASA using 3-D printing methods that allowed the casting of polyurethane clamp test articles to accommodate 4-inch and 8-inch diameter pipes. The prototype clamps were installed with a subsea adhesive in a "wet" environment and then tested in the NASA Structures Test Laboratory (STL). The tension, compression, and bending test data showed that the prototype sensor clamps achieved good structural coupling, and could provide high quality strain measurement for active monitoring.
Document ID
20150002987
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Seaman, Calvin H. (NASA Johnson Space Center Houston, TX, United States)
Brower, David V. (Astro Technology, Inc. Houston, TX, United States)
Le, Suy Q. (NASA Johnson Space Center Houston, TX, United States)
Tang, Henry H. (Aerodyne Industries Houston, TX, United States)
Date Acquired
March 16, 2015
Publication Date
May 31, 2015
Subject Category
Quality Assurance And Reliability
Mechanical Engineering
Report/Patent Number
JSC-CN-32886
Meeting Information
Meeting: International Conference on Ocean, Offshore and Arctic Engineering
Location: St. John''s, NL
Country: Canada
Start Date: May 31, 2015
End Date: June 5, 2015
Sponsors: American Society of Mechanical Engineers
Distribution Limits
Public
Copyright
Public Use Permitted.

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