针对页岩气、盐膏层、泥岩地层以及油层出砂等特殊井况，会产生极端或非均匀的外部挤毁压力。衡钢通过优化材料化学成分、热处理工艺和力学性能，自主研发了一系列性能优于 API Spec 5CT 同尺寸同钢级套管的抗挤毁套管。该产品已广泛应用于国内外各大油田。
| 产品 | Specification | Grade | Connection | 标准 | Typical Application | |
|---|---|---|---|---|---|---|
| OD (mm) | WT (mm) | |||||
| High Collapse Resistant Casing Series | 114.3~339.7 | 5.21~15.88 | HS80T/HS80TT HS90T/HS90TT HS95T/HS95TT HS110T/HS110TT HS125T/HS125TT HS140T/HS140TT HS150T/HS150TT |
S/L/B/ HSM-1/ HSM-2 |
HK35-2019 or Technical Agreement |
For complex geological conditions such as salt formations, deep wells, etc. |