Serious casing wear greatly reduces the collapsingstrength and corrosion life.
套管磨损严重时，将使套管的抗挤毁能力和腐蚀寿命大大下降。
2
To solve this problem, a special casing - TP130TT high collapsingstrength heavy casing has been developed.
针对这一问题，开发了一种特殊套管——TP130 TT高抗挤厚壁套管。
3
The shot diameter, shot density and shot phasing related to the collapsingstrength coefficient are analyzed, and the result is helpful to the perforation optimum design.