Design of a water jet drill for development of geothermal resources. Annual progress report, June 1, 1976--May 31, 1977 [electronic resource].
- Rolla, Mo. : University of Missouri--Rolla. Rock Mechanics & Explosives Research Center, 1977.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 37 : digital, PDF file
- Additional Creators:
- University of Missouri--Rolla. Rock Mechanics & Explosives Research Center and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Research was expanded to the drilling of crystalline rock. Advance rates of 40 inches per minute have been achieved at 16,000 psi, 10 gpm flow rate in a 30,000 psi compressive strength rock using the water alone as the drilling mechanism. The quality of the hole achieved as the jet drilled a variety of rock was found to vary and a hydromechanical drilling bit, combining high pressure water jets with roller cones, has been developed. A field drilling unit has been tested and modified to allow the drilling of holes to 3/sup 1///sub 2/ inch diameter using the hydromechanical drill. Preliminary work on the development of a cavitation test for rock is also included.
- Report Numbers:
- E 1.99:coo-2677-8
- Other Subject(s):
- Published through SciTech Connect.
- Funding Information:
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