New geothermal well-completion and rework technology by laser

Bajcsi, Péter and Bozsó, Tamás and Bozsó, Róbert and Molnár, Gábor and Tábor, Viktor and Czinkota, Imre and Tóth, Tivadar M. and Kovács, Balázs and Schubert, Félix and Bozsó, Gábor and Szanyi, János (2015) New geothermal well-completion and rework technology by laser. Central European Geology, 58 (1-2). pp. 88-99. ISSN 1788-2281

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Abstract

Our research team has developed a new well completion and rework technology involving lasers. The system is made up of a high-power laser generator and a custom-designed directional laser drilling head. The laser head is attached to a coiled tubing unit to maximize production and to carry out special downhole tasks. In this phase of the development effort, laser technology is particularly well suited to cost-efficiently drill short laterals from existing wells in a single work phase, drilling through the casing and cement as well as the formation. The technology, which is an extended perforation solution, enables a more intensive interaction with the downhole environment and supports cutting edge subsurface engineering scenarios such as barite removal. Laser-induced heat treatment appears to be a suitable alternative to effectively remove the almost immovable deposits and scales from thermal water-well pipes.

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