In the real time test by electric gauge for the high P and Y wells,the paper recommends using quartz as the conductor,makes sure the gauge to low down successfully by proper heavy bars,and works steadily.

These results are valuable to casing program design,casing protection measure selection and optimization of operation parameters in high pressure high temperature wells.

Optimization of well killing method for high pressure gas wells;

Application examples of gas logging parameters combined with drilling time in the well control of the high pressure gas well.;

Thread sealing property in high temperature and high pressure gas wells is more important than that in oil wells.