Finite element analysis for buckling behaviour of coiled tubing in horizontal wellbores

The model of coiled tubing is built using non–linear finite element analytical method and the distortion of tubing in a vertical well is simulated dynamically. The buckling of coiled tubing in horizontal wellbores is discussed on the basis of computer simulations and the critical buckling load of coiled tubing is given. Then the unit lateral contact force corresponding to the helical configurations between CT and casing is obtained in vertical, inclined, and curved wells, respectively.