Complex sentence: In the case of Puchuldiza, drilling in six exploratory wells occurred to depths of, but in 1982 it was found that the flow rates at Puchuldiza were not sufficient to justify a geothermal project.
Split into simpler sentences: In the case of Puchuldiza, drilling in six exploratory wells occurred to depths of. However in 1982 it was found that the flow rates at Puchuldiza were not sufficient to justify a geothermal project.