The performance of foaming agents is the key to the success of production gas techniques of foam drainage.

Through application research and continuous improvement for years, a blocking removal and prevention technique based on alcohol injection and a foam drainage gas recovery technique have been formed.

UT-11C,a kind of liquid foaming agent,is the most common foam drainage agent used for Daniudi gasfield.

Study on the formulation and influence of the high stability aqueous foam;

The method used is similar to those for general aqueous foam generation.

Influence factors and adjustment of aqueous foam stability are reviewed.

A research on applying thermal insulating property of foam cement to the thermal recovery of deep viscous crude oil;

This paper analyzes the main factors on cementing qualities including irregular wellbores, high moving up speed of hydrocarbon, long sealing hole sections and imperfect cementing technologies, etc; meanwhile, it presents the following new technologies for improving the cementing quality: foam cementing, low-density and high-strength slurries, plastic cement, filling packers with slurries, etc.

Application of acoustic impedance in quality evaluation on well cementation by foamed cement.;

After analyzing many cementing practices,it is known that foamed cement is the Ultra-lightweight cement and has been used successfully as necessary technology of air drilling ay home and aboard.

Referring to the design of the AFFF fire extinguishing system on the helicopter flight deck of surface naval ships,the foam concentration and the foam tank capacity are chosen.