Casing Collapse Strength Analysis under Nonuniform Loading Using Experimental and Numerical Approach

Table 1

Experimental scheme.

Group	Number	Loading angle (°)	Purpose	Notes
1	1-1	0° (line loading)	Impact of sample length on collapsing strength	Length: sample is 1D, tooling is 1D
	1-2			Length: sample is 2D, tooling is 1D
	1-3			Length: sample is 3D, tooling is 1D
2	2-1	0°	Impact of loading angle on collapsing strength	Length: sample is 7D, tooling is 2D
	2-2	15°
	2-3	30°
	2-4	45°

Notes: D is casing diameter; D = 139.7 mm.