Robert M. Potter

TL;DR: Two hot dry rock geothermal energy reservoirs were created by hydraulic fracturing of Precambrian granitic rock on the west flank of the Valles Caldera, a dormant volcanic complex, in the Jemez Mountains of northern New Mexico as discussed by the authors.

TL;DR: In this article, an attempt was made to synthesize the results of active seismic experiments carried out by the Los Alamos National Laboratory's Hot Dry Rock Project staff for determining the geometrical and physical properties of the fracture system produced by hydraulic fracturing in a hot, low-permeability rock.

TL;DR: In this article, the authors present a method for thermally drilling a wellhole by directing a fluid having a temperature greater than about 500 °C above the ambient temperature of the material and less than about the temperature of brittle-ductile transition temperature of a material to a target location on the surface of the materials, wherein the fluid produces a heat flux of about 0.1 to about 50 MW/m** at an interface between the fluid and the target location.

TL;DR: The phase I Hot Dry Rock Geothermal Energy reservoirs at the Fenton Hill field site grew continuously during Run Segments 2 through 5 (January 1978 to December 1980). Reservoir growth was caused not only by pressurization and hydraulic fracturing, but also by heat extraction and thermal-contraction effects as discussed by the authors.

TL;DR: In this article, a thermal system capable of providing substantially hot fluid, and comprising at least one jet nozzle, was used for excavation of a borehole in a geological formation, and a mechanical drilling system comprising a drill bit was used to produce cuttings and produce boreholes in the geological formation.