Quasistatic Nonlinear Analysis of a Drill Pipe in Subsea Xmas Tree Installation

Table 1

Known parameters.

Property	Value
Sea depth (H)/m	1500
Density of sea water ()/kg/m^3	1025
Wave height (H’)/m	6.5
Wave period (T)/s	8.5
Surface wind-generated current velocity ()/m/s	1
Tidal velocity (Vd) /m/s	1
Latitude of the location ()/rad/s	π/4
Density of drill pipe (ρs)/kg/m^3	7850
Elastic modulus of steel (E)/GPa	206
Outside diameter (D)/mm	127
Thickness of pipe (δ)/mm	9.19
Drag force coefficient (Cd)	1.2
Inertia force coefficient (Cm)	1.6
Weight of tree (Gtree)/kN	500
Drainage volume of tree (V)/m^3	15.3
Drag area of tree (S)/ m^2	10
Number of drill pipe segments (n)	1500