The focal objective of this work is to calculate the energy consumption for constructing the EGS (Enhanced Geothermal Systems) wells, to examine the energy (heat and power) performance of such well systems, and to propose and evaluate several ways for improving that performance. A model was developed to compute the pressure and temperature fields of the geofluid flowing in the production and in...

The current phase of the European Hot Dry Rock Project at Soultz-sous-Forêts requires the drilling of two additional deep wells to 5000 m depth into the crystalline basement, to form a module consisting of a central injector and two producers. The first well GPK-2 was drilled to 5000 m in 1999 and stimulated in 2000. The well GPK-3 (the injector) was drilled in 2002 and targeted using microseis...

High temperature power electronics has become possible with the recent availability of silicon carbide devices. This material, as other wide-bandgap semiconductors, can operate at temperatures above 500°C, whereas silicon is limited to 150-200°C. Applications such as transportation or a deep oil and gas wells drilling can benefit. A few converters operating above 200°C have been demonstrated, b...

Selective growth of Ge,Si, _ x on Si is demonstrated for the first time using a pulsed laser induced epitaxy technique, combined with either standard oxide or liftoff patterning processes. Two different dimensions of Ge,,12Si0.88/Si lateral wells are formed, 3.5 pm wide by 1700 A deep, and 6 pm wide by 1300 A deep. High-resolution transmission electron microscopy, combined with energy-dispersiv...

We report the development of complete structural AlGaN-based deep-ultraviolet light-emitting diodes with an aluminum thin layer for increasing light extraction efficiency. A 217% enhancement in peak photoluminescence intensity at 294 nm is observed. Cathodoluminescence measurement demonstrates that the internal quantum efficiency of the deep-UV LEDs coated with Al layer is not enhanced. The emi...

It is difficult to adapt traditional screw motors with rubber stators the high-temperature and high-pressure conditions in ultra-deep wells, where age, deform carbonize, resulting motor failure. In this study, goal develop volumetric power drilling tools that can be used drill at depths of 10,000 m. To meet goal, an all-metal applied wells designed, then its deformation structural design are st...

The first phase of an accelerated project to develop Saudi Arabia’s deep gas potential has been sanctioned, and a large number of new gas producers are currently being drilled and completed. A number of wells have been either acid or hydraulically frac’d, and preliminary production tests have shown significant productivity increases resulting from this type of stimulation. Consequently, plans h...