关键词: 斜直井, 管柱变形, 钻压, 临界载荷, 模拟实验装置

Abstract: Based on the physical similitude principle,a small-scale simulator of tubular buckling in well was designed.The relationship of the drilling pressure transition and displacement with loading in slant well was experimented with the tubular buckling simulator by changing the non-dimensional axial force,non-dimensional friction factor and non-dimensional axial force distribution factor got from the buckling differential equation.The curves of load transference,relationship between force and displacement,and critical buckling during the tubular buckling were obtained.The difference of the theoretic and experimental curves is less than 10 percent,and the difference of theoretic critical buckling load and experimental critical buckling load is less than 6 percent.These results of experiment can provide the bases for modifying the theoretical models.

Key words: slant well, tubular buckling, drilling load, critical buckling load, simulator