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Hyewon Lee, Seung-Ho Ham, Myung-Il Roh, Sol Ha, "Dynamic simulation of the wireline riser tensioner system for a mobile offshore drilling unit based on multibody system dynamics," Ocean Engineering, vol. 106, pp. 485-495, 2015.09.15.

by Sol Ha posted Jan 19, 2015
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Abstract In this study, a wireline riser tensioner system was dynamically simulated to analyze the dynamic response of the riser in a mobile offshore drilling unit (MODU) such as a drilling rig or a drillship. The main function of the riser tensioner system is to sustain the tension to avoid buckling, regardless of the MODU motion. The wireline riser tensioner system consists of a tension ring, wireline, pneumatic cylinders, and air pressure vessels (APVs). It reduces the vertical motion of the top of the riser string caused by the motion of the drilling rig. In this study, the equations of motion of the drilling rig and the riser tensioner system were formulated based on multibody system dynamics. The discrete Euler-Lagrange equation was used to formulate the equations of motion. For the external forces, both hydrostatic and hydrodynamic forces were considered. Among the various properties of the riser tensioner system, the gas volume inside the APVs was changed to check the maximum tension on the lower flex joint of the riser. As a result, the minimum gas volume was found, which satisfies the maximum tension criteria of the lower flex joint.
Publication Date 2015-09-15
Key Words Wireline riser tensioner system; Dynamic simulation; Multibody system dynamics; Pneumatic system; Drilling rig
SCI SCI
Impact Factor 1.351
ISSN 0029-8018
DOI http://dx.doi.org/10.1016/j.oceaneng.2015.07.028

Hyewon Lee, Seung-Ho Ham, Myung-Il Roh, Sol Ha, "Dynamic simulation of the wireline riser tensioner system for a mobile offshore drilling unit based on multibody system dynamics," Ocean Engineering, vol. 106, pp. 485-495, 2015.09.15.


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