Dynamic Buckling Characteristics of Drill String in Horizontal Wells

• DOI: 10.1142/s0219455424501219
• Publication Date: 2023-08-28T08:02:31Z
• Authors: Jialin Tian; Haolin Song; Yinglin Yang; Lanhui Mao; Junyang Song
• Keywords: Drill string; Contact force

Buckling may cause drill string damage or even drilling failure. For the 3[Formula: see text]000-m-long horizontal section string, a simplified analysis model of in well is established, and dynamic response results axial displacement, angular displacement contact force are obtained. When buckling, closer position to bottom, later buckling time, smaller deformation degree, slower growth rate attenuation degree amplitude. After undergoes tensile eventually remains stable state. stabilization, from top bottom increment increases first, then unchanged decreases, relative torsion angle between different positions gradually decreases. The always with wellbore, resulting same values at locations. change inclination does not affect law force. absolute value negatively correlated angle, positively deviation but quite close. research can provide reference for alleviating wells.