Puguang gas field is a large-scale equipped marine gas field which has been successfully developed by SINOPEC. In this article, the drilling practices of ultra-deep wells in Puguang gas field were summarized comprehensively. The practices were divided into the exploratory stage, developing stage and gas drilling stage. From 0.99m/h in the exploratory stage, the ROP was raised to 1.70 and 2.61m/h in the developing stage and gas drilling stage respectively. The drilling speed-increasing effect is very obvious. Some proposals are put forward to speed up the progress of ultra-deep well drilling technology for Sinopec.