Study and Test of a New Bundle-Structure Riser Stress Monitoring Sensor Based on FBG

Sensors

Jian Xu¹  Dexing Yang¹  Chuan Qin¹  Yajun Jiang¹  Leixiang Sheng³  Xiangyun Jia¹  Yang Bai¹  Xiaohong Shen⁴  Haiyan Wang⁴  Xin Deng²  Liangbin Xu³  Shiquan Jiang³ 

[1]Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, 127 West Youyi Road, Xi’an 710072, China

[2] E-Mails:

[3]Zhanjiang Western South China Sea Oil Survey and Design Co., Ltd., Nanyou Engineering Building, Nandiao Road, Zhanjiang 524057, China

[4] E-Mail:

[5]Key Lab of Deepwater Engineering CNOOC Research Institute, Room 808, CNOOC Plaza, Taiyanggong South Road 6#, Chaoyang District, Beijing 100028, China

[6] E-Mails:

[7]School of Marine Science and Technology, Northwestern Polytechnical University, 127 West Youyi Road, Xi’an 710072, China

[8] E-Mails:

关键词: FBG;    riser;    stress monitoring;    bundle-structure;    marine test;   

DOI  :  10.3390/s151129648

来源: mdpi

【 摘 要 】

To meet the requirements of riser safety monitoring in offshore oil fields, a new Fiber Bragg Grating (FBG)-based bundle-structure riser stress monitoring sensor has been developed. In cooperation with many departments, a 49-day marine test in water depths of 1365 m and 1252 m was completed on the “HYSY-981” ocean oil drilling platform. No welding and pasting were used when the sensor was installed on risers. Therefore, the installation is convenient, reliable and harmless to risers. The continuous, reasonable, time-consistent data obtained indicates that the sensor worked normally under water. In all detailed working conditions, the test results show that the sensor can do well in reflecting stresses and bending moments both in and in magnitude. The measured maximum stress is 132.7 MPa, which is below the allowable stress. In drilling and testing conditions, the average riser stress was 86.6 MPa, which is within the range of the China National Offshore Oil Corporation (CNOOC) mechanical simulation results.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.