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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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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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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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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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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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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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Frictional heating and convective cooling of polycrystalline diamond drag tools during rock cutting

Description: A numerical-analytical model is developed to predict temperatures in stud-mounted polycrystalline diamond compact (PDC) drag tools during rock cutting. Experimental measurements of the convective heat transfer coefficient for PDC cutters are used in the model to predict temperatures under typical drilling conditions with fluid flow. The analysis compares favorably with measurements of frictional temperatures in controlled cutting tests on Tennessee marble. It is shown that mean cutter wearflat … more
Date: January 1, 1982
Creator: Ortega, A. & Glowka, D.A.
Partner: UNT Libraries Government Documents Department
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Geothermal drilling ad completion technology development program. Semi-annual progress report, April-September 1979

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, and completion technology. 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 1982 and by 50% by 1986.
Date: May 1, 1980
Creator: Varnado, S.G. (ed.)
Partner: UNT Libraries Government Documents Department
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Failure mechanisms of polycrystalline diamond compact drill bits in geothermal environments

Description: Over the past few years the interest in polycrystalline diamond compact (PDC) drill bits has grown proportionately with their successful use in drilling oil and gas wells in the North Sea and the United States. This keen interest led to a research program at Sandia to develop PDC drill bits suitable for the severe drilling conditions encountered in geothermal fields. Recently, three different PDC drill bits were tested using either air or mud drilling fluids: one in the laboratory with hot air,… more
Date: September 1, 1981
Creator: Hoover, E. R. & Pope, L. E.
Partner: UNT Libraries Government Documents Department
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WELCST: engineering cost model of geothermal wells. Description and user's guide

Description: WELCST, a FORTRAN code for estimating the effects of R and D project results upon the future cost of geothermal wells is described. The code simulates the drilling and completion of a well at 27 specific US geothermal prospects, given assumptions about well design and casing plan, formation drillability, and selected engineering and cost characteristics of today's drilling technology. The user may change many of the assumptions about engineering and cost characteristics to allow WELCST to simul… more
Date: February 1, 1979
Creator: Entingh, D.J. & Lopez, A.
Partner: UNT Libraries Government Documents Department
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Engineering report on drilling in the Sand Wash Basin, Colorado. [In support of NURE program]

Description: The Sand Wash Basin Drilling project was conducted by Bendix Field Engineering Corporation in support of the US Department of Energy (DOE) National Uranium Resource Evaluation (NURE) program. This project consisted of 27 drill holes ranging in depth from 110 feet (33.5 m) to 1,995 feet (608.1 m). A total of 25,514 feet (7,471.9 m) was rotary drilled, and 1,593.5 feet (485.7 m) were cored resulting in a total of 26,107.5 feet (7,957.6 m) drilled for the project. The objective of the project was … more
Date: January 1, 1980
Creator: Callihan, M C
Partner: UNT Libraries Government Documents Department
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Field Drilling Tests on Improved Geothermal Unsealed Roller-Cone Bits. Final Report

Description: The development and field testing of a 222 mm (8-3/4 inch) unsealed, insert type, medium hard formation, high-temperature bit are described. Increased performance was gained by substituting improved materials in critical bit components. These materials were selected on bases of their high temperature properties, machinability and heat treatment response. Program objectives required that both machining and heat treating could be accomplished with existing rock bit production equipment. Six of th… more
Date: May 1, 1980
Creator: Hendrickson, R. R.; Jones, A. H.; Winzenried, R. W. & Maish, A. B.
Partner: UNT Libraries Government Documents Department
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Semi-annual report on the project to design and experimentally test an improved geothermal drill bit, Phase II

Description: The test facilities (the geothermal drilling vessel and the geothermal drill-bit seal tester) were completed and de-bugged, and the first tests were run on full-scale research drill bits and drill-bit seals. In addition, more materials information was gathered, and a number of additional seals of high-temperature elastomer materials were obtained for testing. Maurer Engineering has also been active in the design and procurement of candidate high-temperature drill-bit seals for testing, and has … more
Date: December 1, 1976
Creator: Barker, L.M. & Green, S.J.
Partner: UNT Libraries Government Documents Department
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Qualification of a computer program for drill string dynamics

Description: A four point plan for the qualification of the GEODYN drill string dynamics computer program is described. The qualification plan investigates both modal response and transient response of a short drill string subjected to simulated cutting loads applied through a polycrystalline diamond compact (PDC) bit. The experimentally based qualification shows that the analytical techniques included in Phase 1 GEODYN correctly simulate the dynamic response of the bit-drill string system. 6 refs., 8 figs.
Date: January 1, 1985
Creator: Stone, C. M.; Carne, T. G. & Caskey, B. C.
Partner: UNT Libraries Government Documents Department
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Research and development of improved cavitating jets for deep-hole drilling

Description: Improved cavitating nozzles have been developed as part of an on-going program to increase the rate of penetration of deep-hole drill bits. Based on the four criteria of: incipient cavitation number, amplitude of pressure fluctuation (and hence enhanced structuring of the jet flow), rock cutting, and cleaning chips from the hole bottom - these new, STRATOJET (STRuctured Acoustically Tuned Oscillating JET) cavitating nozzle systems have out-performed both conventional drill bit nozzles and the b… more
Date: January 1, 1984
Creator: Johnson, V.E. Jr.; Lindenmuth, W.T.; Chahine, G.L.; Conn, A.F. & Frederick, G.S.
Partner: UNT Libraries Government Documents Department
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Studies of the frictional heating of polycrystalline diamond compact drag tools during rock cutting

Description: A numerical-analytical model is developed to analyze temperatures in polycrystalline diamond compact (PDC) drag tools subject to localized frictional heating at a worn flat area and convective cooling at exposed lateral surfaces. Experimental measurements of convective heat transfer coefficients of PDC cutters in a uniform crossflow are presented and used in the model to predict temperatures under typical drilling conditions with fluid flow. The analysis compares favorably with measurements of … more
Date: June 1, 1982
Creator: Ortega, A. & Glowka, D.A.
Partner: UNT Libraries Government Documents Department
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Laboratory and Field Testing of Improved Geothermal Rock Bits

Description: The development and testing of 222 mm (8-3/4 inch) unsealed, insert type, medium hard formation, high-temperature bits are described. The new bits were fabricated by substituting improved materials in critical bit components. These materials were selected on bases of their high temperature properties, machinability, and heat treatment response. Program objectives required that both machining and heat treating could be accomplished with existing rock bit production equipment. Two types of experi… more
Date: July 1, 1980
Creator: Hendrickson, R. R.; Jones, A. H.; Winzenried, R. W. & Maish, A. B.
Partner: UNT Libraries Government Documents Department
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Geothermal drilling and completion technology development program. Semi-annual progress report, October 1978-March 1979

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 drill bits, drilling fluids, and completion technology. 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 1982 and by 50% by 1986.
Date: September 1, 1979
Creator: Varnado, S.G. (ed.)
Partner: UNT Libraries Government Documents Department
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Energy technologies at Sandia National Laboratories: Past, Present, Future

Description: We at Sandia first became involved with developing energy technology when the nation initiated its push toward energy independence in the early 1970s. That involvement continues to be strong. In shaping Sandia's energy programs for the 1990s, we will build on our track record from the 70s and 80s, a record outlined in this publication. It contains reprints of three issues of Sandia's Lab News that were devoted to our non-nuclear energy programs. Together, they summarize the history, current act… more
Date: August 1, 1989
Partner: UNT Libraries Government Documents Department
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Use of single-cutter data in the analysis of PDC bit designs

Description: A method is developed for predicting cutter forces, temperatures, and wear on PDC bits as well as integrated bit performance parameters such as weight-on-bit (WOB), drilling torque, and bit imbalance. A computer code called PDCWEAR has been developed to make this method available as a tool for general bit design. The method uses single-cutter data to provide a measure of rock drillability and employs theoretical considerations to account for interaction among closely spaced cutters on the bit. … more
Date: October 10, 1986
Creator: Glowka, D.A.
Partner: UNT Libraries Government Documents Department
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