The term geothermal originates from Greek, which means heat on earth. The excess heat beneath the earth is a renewable source, which is conveniently utilized for humanity’s increasing fuel needs. With efficient measures, geothermal energy is more cost-effective than other sources of energy. With this being said, it is worthwhile to explore and use geothermal drilling.
Sourcing our Geothermal Energy
In the winter season, the earth’s surface may be cold, but it becomes hotter after a certain level beneath the earth because of the cold atmospheric temperature. It is opposite in the summers. As a result of this difference in temperature, thermal energy is produced.
From hot springs, geothermal energy can be harnessed directly to be used for space heating, food drying or any purpose for any other type of industry. However, these procedures can be done near the resource only. Geothermal energy is a continuous source, which is mainly used to generate electricity. This is why it entails drilling geothermal wells.
Geothermal well drilling is similar to oil and gas drilling, wherein drilling rigs are utilized. The entire geothermal drilling equipment comprises of a drill pipe, drilling fluid, drilling rig, drill bit, and a power system. By using a drill pipe, drilling fluid is transferred from a mud pit to the ground below. To rotate the drill bit, which does the real cutting of the surface, uses also the drill pipe.
The purpose of the drill fluid is to bring up the cuttings quickly from the bottom so that the rocks and debris do not hinder the drilling process. The power system supplies power to the entire operation, which can be electricity, hydraulic or diesel-powered engine.
Ultimately, the drilling rig manipulates all of these tasks. It keeps up the power, rotate the drill bit, hoist the drill pipe, and circulate the drill fluid. Steam or high-pressure fluid may suddenly erupt through the opening, which is why there are other tools used to avoid these hazardous incidents.
After the drilling is complete, a geothermal well is constructed immediately. Steel pipe or casing lines are put in place and the gap between the pipe and the rocks are covered with cement to avoid expansion and shifting.
Geothermal drilling has its benefits and is a very profitable business. Although greenhouse effect is one of the drawbacks of geothermal drilling, research is being carried out to economize this renewable source and at the same time minimize its effects on the environment.
Geothermal well drilling is a challenging job even for the experienced companies. Make sure you use the best and correct well drilling rigs for the job. You can find many dealers online, selling and renting drilling rigs. Take your time to research and compare.