Shape Memory Screen Self-Packing Sand Control Completion Technology

In view of the shortcomings of stand-alone screen sand control completions, which include insufficient borehole support and short valid period, as well as the complicated process of gravel packing sand control completion, sand plugging-prone and high cost, a one-run shape memory screen completion technology was proposed to realize the long open-hole annulus packing. On the basis of optimizing the mechanical structure of shape memory screen, the production process of shape memory screen was formed, and the performance evaluation experiment of shape memory screen was conducted by utilizing the developed screen performance evaluation device, so as to form the shape memory screen self-packing sand control completion process. The results of downhole test showed that the self-packing shape memory sand control screen had superior expansion performance, and could completely fill the annulus and perforation tunnels, with good permeability and high sand retaining precision after expansion. The shape memory screen self-packing sand control completion technology is easy to operate, adapts to irregular wellbores, and is a good potential candidate for adoption in the future.