The　deepwater　S-lay　pipeline　maintains　high　tension,　bending　moment,　and　stress　in　the　overbend　section,　exhibiting　substantially　dynamic　responses　due　to　pipe-stinger　roller　interactions.　This　paper　presents　a　refined　Slay　pipeline　model　capable　of　accurately　describing　the　forces　and　deformations　on　the　pipeline　section.　In　this　model,　the　pipeline　is　discretized　into　beam　particles　and　beam　elements　using　the　vector　form　intrinsic　finite　element　(VFIFE)　method.　Meanwhile,　the　equivalent　beam　particle　technique　is　developed　to　account　for　both　the　local　forces　and　deformations　of　the　pipeline　as　well　as　its　overall　static　and　dynamic　responses.　Through　program　coding,　a　dynamic　time-domain　simulation　was　accomplished　for　a　12-inch　pipeline　being　laid　to　a　water　depth　of　1000　m　to　provide　a　detailed　illustration　of　the　S-lay　modeling　process.　Furthermore,　dynamic　behaviours　of　the　pipeline　in　the　overbend　were　systematically　investigated　under　various　groups　of　the　pipe　diameter　and　the　stinger　roller　spacing.　The　results　indicate　that　the　stress　and　deformation　on　the　upper　section　of　the　pipeline　are　more　significant　than　those　on　the　lower　section.　The　equivalent　beam　particle　method　extends　the　capabilities　of　the　VFIFE　for　the　detailed　analyses　of　local　dynamic　behaviours　of　deepwater　S-lay　pipelines.