Fig. 7

Variation of collapse pressure with circumferential angle and deviation angle: (a) azimuth angle 0°; (b) azimuth angle 30°; (c) azimuth angle 60°; (d) azimuth angle 90°.

Variation of collapse pressure with circumferential angle and deviation angle: (a) azimuth angle 0°; (b) azimuth angle 30°; (c) azimuth angle 60°; (d) azimuth angle 90°.