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- W1569673240 abstract "The United States Department of Energy is involved in a variety of scientific and engineering feasibility studies requiring extensive drilling in hard crystalline rock. In many cases well depths extend from 6000 to 20,000 feet in high-temperature, granitic formations. Examples of such projects are the Hot Dry Rock well system at Fenton Hill, New Mexico and the planned exploratory magma well near Mammoth Lakes, California. In addition to these programs, there is also continuing interest in supporting programs to reduce drilling costs associated with the production of geothermal energy from underground sources such as the Geysers area near San Francisco, California. The overall progression in these efforts is to drill deeper holes in higher temperature, harder formations. In conjunction with this trend is a desire to improve the capability to recover geological information. Spot coring and continuous coring are important elements in this effort. It is the purpose of this report to examine the current methods used to obtain core from deep wells and to suggest projects which will improve existing capabilities. 28 refs., 8 figs., 2 tabs." @default.
- W1569673240 created "2016-06-24" @default.
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- W1569673240 date "1988-08-01" @default.
- W1569673240 modified "2023-09-26" @default.
- W1569673240 title "Coring in deep hardrock formations" @default.
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- W1569673240 doi "https://doi.org/10.2172/7054696" @default.
- W1569673240 hasPublicationYear "1988" @default.
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