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| Coupling Effect of Deep-water Drilling Riser in Recoil after Emergency Disconnection |
| Received:July 19, 2018 Revised:December 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.12.007 |
| KeyWord:drilling riser emergency disconnection recoilo platform excitation discharging flow effect coupling effect |
| Author | Institution |
| SU Wei |
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai , China |
| MENG Shuai |
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai , China |
| WANG Jun-xiong |
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai , China |
| WANG Zhen |
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai , China |
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| Abstract: |
| Objective To explore the coupling effect of top platform incentive and discharge flow effect on dynamic recoil response of deepwater drilling riser after emergency disconnection. Methods The coupling effects of the top platform and the discharging flow column (in the mud discharge and seawater refilling process) on the recoil response of a drilling riser after an emergency disconnection were researched with four different mathematical model based on lumped mass method and different formulas for the external force matrix and the internal flow column acceleration, which can be solved by use of Newmark-β method. Results Thetop platform excitation and the discharging flow effect could significantly affect the recoil after emergency disconnection, especially the distance between the lower end assembly of the raise and the well head in the initial stage. Conclusion The combined coupling effect of the top platform and the discharging flow raise should be taken into consideration in dynamic recoil analysis and control system design for emergency recoil of deepwater drilling riser. |
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