A static drilling riser model using free boundary conditions |
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| Authors: | Luc Huyse Mansa C Singh Marc A Maes |
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| Institution: | ?Civil Engineering Department, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4;?Mechanical Engineering Department, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4;?Civil Engineering Department, The University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4 |
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| Abstract: | A static three-dimensional analytical method for drilling risers experiencing large displacements and slip at the top joint is presented. The riser is described in cylindrical coordinates as a three-dimensional tensioned string, without bending or torsional stiffness. The vertical vessel displacement is not taken into account. The equilibrium configuration is obtained from the stationary condition of the total potential energy functional. Kinematic boundary conditions are introduced for the radial displacement only. The riser orientation at the top directly follows from the natural boundary conditions based on the variational treatment of the energy functional. |
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