Compared with normal rods, the carbon fibre coiled rod behaves much more advantages, such as lighter weight, better elasticity, resisting corrosion, higher fatiguelimit, etc.
碳纤维连续抽油杆与普通抽油杆相比具有质量轻、弹性好、抗腐蚀、耐疲劳等优点。
2
Because of the interaction of external loads and corrosion, the reliability index decays very quickly. And fatiguelimit-state will take control of the safety of the cables and Bridges.