| 摘要 |
<p>The invention relates to a biodegradable foaming composition for gas wells and to a process for preparing the same. According to the invention, the composition consists of a solid mixture of surfactants of the fatty alcohol polyethoxylate type comprising 65...76% C...Cfatty alcohol ethoxylate with an ethoxylation degree of 80, 10...20% (tri)decanol ethoxylate with an ethoxylation degree of 11, 2...4% oleic amide ethoxylate with an ethoxylation degree of 10 and 10...13% polyethylene glycol with an average molecular mass of 4500. The process claimed by the invention consists in melting and homogenizing the mixture of biodegradable components within a closed autoclave, air bubbling at a temperature of 49°C, for 25 minutes, using sintered glass porous diffusers, resulting in subunitary foam-forming sticks having a density in the range of 0.7...0.95 g/cm.</p> |
