Well control technical measures

(1) Surface cementing

1. The surface drilling depth of the drilling team must enter the stable layer more than 50 meters to ensure the cementation quality of the cement ring and the formation of the lower surface cover.

2. It is necessary to attach great importance to the su

Audi "Zero Recall" Gearbox Failure Confirmation Case

Some consumers complained that Audi, the luxury car brand with the highest sales volume in the Chinese market, had problems with burning oil, leaking oil, and transmission failures. It communicated with Audi through a variety of methods, including Audi dealer