High-temperature Expandable casing hole liner (ECL) was unsuccessful. The rubber element can not sustain the temperature higher than 160 °C, and steel bevel elements can not meet the requirements for sealing and hanging. In our research copper bands were inlayed on the steel pipe; an optimal manufacture process made the welding of copper had little effect on the mechanical behaviors for both steel and copper, which insured the lower expansion pressure and better sealing. These were tested by the expansion experiments and the following cycled temperature loading and hydrostatic test, the sealing elements can sustain the external pressure 20MPa. We designed an ECL for casing remediation in horizontal well, in which the expansion cone moves downwards. This design avoided the gravity and fraction of oil tube, which leads to the lower expansion pressure. Expandable open-hole liner (EOL) was a well completion plan for sidetracking well for its bigger inner diameter (I.D.), but decentralized EOL led to the cementing failure. In our plan the reamer was not used after the sidetracking, the expansion cone expanded the tubular up to the open hole together with swelling rubber elements for zonal isolation. The most important aspect that affects the intensity of Expandable Tubular was the thread. We modified the structure of thread: increasing the wall thickness at both ends before threads are done, upsetting or welding thicker pipe at the ends are both applicable.

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