Application of Extension Hanger in Gas Well Cementation of Narrow Layers Pressure Windows

As a cat well in Mahudang of Burma on anticline structure zone, YH-1 encountered narrow formation pressure window stratum in the process of drilling with the problem that loss of filtration is serious and the speed of air cutting rises rapidly. Application of drilling liner hanger into cementation, combined with expansive slurry system in well YH-1 has met cementing requirements. Well sections are qualified and sealing sections of high quality amount to 49.4 percent. The field application results display that the usage of drilling liner hanger in narrow formation pressure window well section, associated with appropriate slurry system are able to satisfy well cementation requirements.