Systems and methods that utilize radiation to set cementitious compositions can be used to set a pipe or casing in a wellbore. The systems and methods involve connecting a radiation tool to the top plug of a two-plug system used to place the cementitious composition in the annulus between the pipe and the wellbore. The systems and methods provide for radiating the cementitious composition as it is introduced into the wellbore and as the radiation tool is retrieved from the pipe.

Systems and methods that utilize radiation to set cementitious compositions can be used to set a pipe or casing in a wellbore. The systems and methods involve connecting a radiation tool to the top plug of a two-plug system used to place the cementitious composition in the annulus between the pipe and the wellbore. The systems and methods provide for radiating the cementitious composition as it is introduced into the wellbore and as the radiation tool is retrieved from the pipe.

The present invention relates to a method for aerogel production and to a composite material produced by said method and comprising an aerogel and mineral fibers. An aerogel material produced on the basis of silicate with a coefficient of thermal conductivity of <18 mW/mK is obtainable by rendering it hydrophobic with HMDSO in the presence of nitric acid.

The present invention relates to a method for aerogel production and to a composite material produced by said method and comprising an aerogel and mineral fibers. An aerogel material produced on the basis of silicate with a coefficient of thermal conductivity of <18 mW/mK is obtainable by rendering it hydrophobic with HMDSO in the presence of nitric acid.