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Influence of ocean load on the axial force of coiled tubing under different buckling states
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NSTL
Elsevier
Coiled Tubing (CT) is disturbed by ocean loads when milling in deep water. The CT's axial force under different buckling states and ocean loads also varies. In this study, to analyze the influence of ocean load on the axial force of coiled tubing under different buckling states, we establish an experimental 'pipe-in-pipe' system under different ocean loads. By simulating the outer pipe's deformation under different ocean loads, the influence of buckling states and ocean loads on the CT's axial force transfer characteristics is studied. The results show that when the CT's buckling state is the same, the greater the ocean load, the greater is the axial force fluctuation. Additionally, when the ocean load is the same, the greater the CT's buckling degree, the greater is the axial force fluctuation, but the axial force transmission efficiency is improved. Besides, the ocean load has little effect on the axial force's transmission efficiency. The results provide theoretical guidance for deepwater milling using coiled tubing.
NSTL
Elsevier
