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Design of a diesel exhaust-gas purification system for inert-gas drilling

Description: To combat the serious oxygen corrosion of drill pipe when a low density drilling fluid (air or mist) is used in geothermal drilling, a system has been designed that produces an inert gas (essentially nitrogen) to be substituted for air. The system fits on three flatbed trailers, is roadable and produces 2000 scfm of gas. The projected cost for gas is slightly less than $2.00 per thousand standard cubic feet.
Date: January 1, 1982
Creator: Caskey, B. C.
Partner: UNT Libraries Government Documents Department
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Optimized design and predicted performance of a deep ocean 50 m piston coring system

Description: Calculational techniques are described which were developed or adapted for the purpose of analyzing the mechanical response of a proposed piston coring system capable of recovering high quality 50 m long cores. The analysis includes the effects of barrel geometry on the mass required to penetrate 50 m of an assumed sediment, the effects of non-vertical entry and pullout on the stresses within the barrel, and the effects of steel cable or parachute piston restraints on the resulting core sample … more
Date: January 1, 1980
Creator: Karnes, C. H.; Burchett, S. N. & Dzwilewski, P. T.
Partner: UNT Libraries Government Documents Department
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Geothermal technology publications and related reports: a bibliography, January 1984-December 1985

Description: Technological limitations restrict the commercial availability of US geothermal resources and prevent effective evaluation of large resources, as magma, to meet future US needs. The US Department of Energy has asked Sandia to serve as the lead laboratory for research in Geothermal Technologies and Magma Energy Extraction. In addition, technology development and field support has been provided to the US Continental Scientific Drilling Program. Published results for this work from January 1984 th… more
Date: September 1, 1986
Creator: Cooper, D.L. (ed.)
Partner: UNT Libraries Government Documents Department
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Design of a water jet drill for development of geothermal resources. Progress report, October 1--November 30, 1977

Description: Progress is reported in the evaluation of the performance of a water jet drill in a stressed rock, particularly in drilling at hole diameters in excess of one inch. Drilling tests are being carried out in a barrier pillar in a layer of coarse, lead-bearing sandstone. Problems encountered in the test drilling are discussed. (JGB)
Date: November 30, 1977
Partner: UNT Libraries Government Documents Department
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Advanced materials for geothermal energy processes

Description: The primary goal of the geothermal materials program is to ensure that the private sector development of geothermal energy resources is not constrained by the availability of technologically and economically viable materials of construction. This requires the performance of long-term high risk GHTD-sponsored materials R and D. Ongoing programs described include high temperature elastomers for dynamic sealing applications, advanced materials for lost circulation control, waste utilization and di… more
Date: August 1, 1985
Creator: Kukacka, L. E.
Partner: UNT Libraries Government Documents Department
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System for producing a uniform rubble bed for in-situ processes

Description: A method and a cutter are disclosed for producing a large cavity filled with a uniform bed of rubblized oil shale or other material, for in-situ processing. A raise drill head has a hollow body with a generally circular base and sloping upper surface. A hollow shaft extends from the hollow body. Cutter teeth are mounted on the upper surface of the body and relatively small holes are formed in the body between the cutter teeth. Relatively large peripheral flutes around the body allow material to… more
Date: April 10, 1981
Creator: Galloway, Terry R.
Partner: UNT Libraries Government Documents Department
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Drilling technology/GDO

Description: The Geothermal Technology Division of the US Department of Energy is sponsoring two programs related to drilling technology. The first is aimed at development of technology that will lead to reduced costs of drilling, completion, and logging of geothermal wells. This program has the official title ''Hard Rock Penetration Mechanics.'' The second program is intended to share with private industry the cost of development of technology that will result in solutions to the near term geothermal well … more
Date: January 1, 1985
Creator: Kelsey, J.R.
Partner: UNT Libraries Government Documents Department
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Laboratory Testing of Percussion Drills for Geothermal Applications

Description: Laboratory tests of percussion drilling tools which were done at Drilling Research Lab, Salt Lake City, during February 1980, are described. The purpose of the tests was threefold: (a) to compare the parenetration rates of different hammers with each other and with conventional rotary drilling; (b) to measure and compare the hammer pulses at normal and high temperatures; and (c) to establish hammer life and failure modes at high temperature. Two roller bit hammers and three solid bit hammers we… more
Date: January 1, 1980
Creator: Finger, John T.
Partner: UNT Libraries Government Documents Department
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Mine roof drill bits that save money

Description: Sandia National Laboratories, Albuquerque, NM, has developed advanced technology roof bolt drill bits which have demonstrated longer life, higher penetration rates at lower thrust and torque, and lower specific energy than conventional roof bolt drill bits. This is achieved through use of advanced technology cutting materials and novel bit body designs. These bits have received extensive laboratory and mine testing. Their performance has been evaluated and estimates of their value in reducing c… more
Date: April 1, 1982
Creator: Ford, L.M.
Partner: UNT Libraries Government Documents Department
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Vertical borehole design and completion practices used to remove methane gas from mineable coalbeds

Description: Coalbed gas drainage from the surface in advance of mining has long been the goal of researchers in mine safety. Bureau of Mines efforts to achieve this goal started about 1965 with the initiation of an applied research program designed to test drilling, completion, and production techniques for vertical boreholes. Under this program, over 100 boreholes were completed in 16 different coalbeds. The field methods derived from these tests, together with a basic understanding of the coalbed reservo… more
Date: August 1, 1980
Creator: Lambert, S. W.; Trevits, M. A. & Steidl, P. F.
Partner: UNT Libraries Government Documents Department
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Testing geopressured geothermal reservoirs in existing wells. Wells of Opportunity Program final contract report, 1980-1981

Description: The geopressured-geothermal candidates for the Wells of Opportunity program were located by the screening of published information on oil industry activity and through direct contact with the oil and gas operators. This process resulted in the recommendation to the DOE of 33 candidate wells for the program. Seven of the 33 recommended wells were accepted for testing. Of these seven wells, six were actually tested. The first well, the No. 1 Kennedy, was acquired but not tested. The seventh well,… more
Date: January 1, 1982
Partner: UNT Libraries Government Documents Department
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Geothermal drilling research in the United States

Description: Current research and development in the following areas are presented: geothermal roller cone bits, polycrystalline diamond compact bits, a continuous chain drill, drilling fluids test equipment, mud research, inert fluids, foam fluids, lost circulation control, completion technology, and advanced drilling and completion systems. (MHR)
Date: January 1, 1980
Creator: Varnado, S. G.
Partner: UNT Libraries Government Documents Department
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Geothermal drilling and completion technology development program. Quarterly progress report, January-March 1980

Description: The progress, status, and results of ongoing Research and Development (R and D) within the Geothermal Drilling and Completion Technology Development Program are described. The program emphasizes the development of geothermal drilling hardware, drilling fluids, completion technology, and lost circulation control methods. Advanced drilling systems are also under development. The goals of the program are to develop the technology required to reduce well costs by 25% by 1983 and by 50% by 1987.
Date: April 1, 1980
Creator: Varnado, S.G. (ed.)
Partner: UNT Libraries Government Documents Department
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Evolution of a Hybrid Roller Cone/PDC core bit

Description: The development of the hot dry rock (HDR) geothermal resource, as presently being accomplished by the Los Alamos Scientific Laboratory (LASL), requires that sufficient quantities of good quality core be obtained at a reasonable cost. The use of roller cone core bits, with tungsten carbide inserts, was initiated by the Deep Sea Drilling Program. These bits were modified for continental drilling in deep, hot, granitic rock for the LASL HDR Geothermal Site at Fenton Hill, New Mexico in 1974. After… more
Date: January 1, 1980
Creator: Pettitt, R.; Laney, R.; George, D. & Clemens, G.
Partner: UNT Libraries Government Documents Department
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Hot dry rock geothermal energy development program. Annual report, fiscal year 1982

Description: Emphasis in the Hot Dry Rock Program was on development of methods to produce the hydraulic fractures required to connect the deep, inclined wells of the Phase II system at Fenton Hill. Environmental surveillance, instrument development, laboratory and modeling studies, and other supporting activities were continued. After two unsuccessful attempts to fracture hydraulically through inflatable packers, formation breakdown was produced in an uncased section near the bottom of well EE-2 by pumping… more
Date: September 1, 1983
Creator: Smith, M.C.; Nunz, G.J. & Ponder, G.M. (eds.)
Partner: UNT Libraries Government Documents Department
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Considerations in the use of water jets to enlarge deep submerged cavities

Description: In order to facilitate use of reinjection wells, and to lower their cost, it has been proposed that a single well be reamed from 22-1/2 cm to 2 m diameter over an increment of 70 m at a depth of 2000 m. In this manner a single well would be capable of coping with flow rates which currently necessitate a dozen wells being emplaced. The problems encountered in using high pressure water jets for this reaming operation are described. Limiting parameters on the use of high pressure water jets and th… more
Date: January 1, 1980
Creator: Summers, D.A. & Sebastian, Z.
Partner: UNT Libraries Government Documents Department
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Drilling and early testing of a sidetrack from the slant hole completion test well

Description: During the winter of 1990 to 1991, the Department of Energy evaluated several options to completing the originally-planned slant hole production tests. A decision was made to sidetrack the original hole and to redrill the 60 and 90{degrees} sections. The objectives for drilling the sidetrack to the original slant hole wellbore are as follows: (1) Test high angle and horizontal drilling and completion technologies as an alternative to vertical wells and hydraulic fracture treatments in tight, na… more
Date: January 1, 1992
Creator: Myal, F.R. & Branagan, P.T.
Partner: UNT Libraries Government Documents Department
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Geothermal well cost sensitivity analysis: current status

Description: The geothermal well-cost model developed by Sandia National Laboratories is being used to analyze the sensitivity of well costs to improvements in geothermal drilling technology. Three interim results from this modeling effort are discussed. The sensitivity of well costs to bit parameters, rig parameters, and material costs; an analysis of the cost reduction potential of an advanced bit; and a consideration of breakeven costs for new cementing technology. All three results illustrate that the w… more
Date: January 1, 1980
Creator: Carson, C. C. & Lin, Y. T.
Partner: UNT Libraries Government Documents Department
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Adaptation of jet accumulation techniques for enhanced rock cutting

Description: The velocity of water jet flow can be increased when the jet impacts a target material or another water jet. A theory describing such augmentation in terms of velocity, mass, and energy change is considered. The phenomena is sensitive to jet structure and the jet velocity profile. Jet velocity profiles do not remain constant over great distances from the nozzle, and ultimately disrupt into droplets. Within the droplet the profile is more regular and the velocity constant. The theory is extended… more
Date: October 26, 1977
Creator: Mazurkiewicz, M.; Barker, C.R. & Summers, D.A.
Partner: UNT Libraries Government Documents Department
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Geothermal drilling and completion technology development program. Quarterly progress report, April-June 1980

Description: The progress, status, and results of ongoing research and development (R and D) within the Geothermal Drilling and Completion Technology Development Program are reported. The program emphasizes the development of geothermal drilling hardware, drilling fluids, completion technology, and lost circulation control methods. Advanced drilling systems are also under development. The goals of the program are to develop the technology required to reduce well costs by 25% by 1983 and by 50% by 1987.
Date: July 1, 1980
Creator: Varnado, S. G.
Partner: UNT Libraries Government Documents Department
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Seal/lubricant systems for geothermal drilling equipment

Description: The development and testing of seals and lubricants for journal-type roller-cone rock bits for drilling into geothermal reservoirs at temperatures over 260/sup 0/C (500/sup 0/F) are described. The conditions experienced by seals and lubricants subjected to geothermal drilling are reviewed along with the basic design requirements for roller-cone bit seals and journal bearing lubricants. Two unique test facilities are described: a seal test machine which simulates pressures, temperatures, and mec… more
Date: July 1, 1980
Creator: Hendrickson, R.R. & Winzenried, R.W.
Partner: UNT Libraries Government Documents Department
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