New evolution at drilling geothermals wells

Abstract

Geothermal energy nowadays belongs to the most interesting, renewable, progressive and ecologically pure energies. Its utilization began long ago, but because development and exploration show that fossil fuels are depletable in outlook of 40 – 50 years, it is needed to pay greater attention to perspective and economically advantageous energies, among which geothermal energy indisputably belongs. Since development continually advances also in drilling technique and technology, it is necessary to conform to this trend and to develop such technologies, procedures and devices, which would, unlike to those currently used, save time, machinery, environment and would be economically more acceptable. This article deals with several possible new methods of drilling such as slimhole drilling, improved control of drilling rinse, using of new modern and better – quality drilling instruments – drilling bits etc. The combination of these new methods and materials brings considerable saving by drilling and thereby lowers financial expense of the whole project. Since Slovakia possesses considerable geothermal sources, which are needed to be drilled and utilized, the following of new trends and methods is of good significance for us, too.

Keywords

• geothermal energy
• geothermal well
• well completion
• hard rock
• slim hole drilling
• drilling mud