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Abstract

Summary

The development of deep geothermal systems to boost global electricity production relies on finding cost-effective solutions to enhance the drilling performance in hard rock formations. In this work, we investigate a novel drilling method combining thermal spallation and conventional drilling. This method aims to reduce the rock removal efforts of conventional drilling by thermally assisting the drilling process by flame jets. Laboratory experiments are conducted on the combined drilling concept by studying the effects of flame treatments on the mechanical strength of hard and soft rocks. In addition, investigation on the interaction between the rock and a cutting tool, permits to show that the combined method can drastically improve the drilling performance in terms of rate of penetration, bit wearing and the required mechanical energy to remove the material. As a proof-of-concept of the method, a field demonstration is presented, where the technology is implemented in a conventional drill rig in order to show the process feasibility as well as to quantify its performance under realistic conditions.

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/content/papers/10.3997/2214-4609.201901604
2019-06-03
2024-03-28
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References

  1. Tokarska, K.B. and Gillett, N.P
    . [2018] Cumulative carbon emissions budgets consistent with 1.5 °c global warming. Nature Climate Change, 8: 296–299.
    [Google Scholar]
  2. Moore, J.N. and Simmons, S.F
    . [2013] More Power from Below. Science, 340: p. 933–935.
    [Google Scholar]
  3. Tester, J.W., Anderson, B., Batchelor, A., Blackwell, D., DiPippo, R., Drake, E., Garnish, J., Livesay, B.
    , Moore, M.C. and Nichols, K. [2006] The Future of Geothermal Energy. Idaho National Laboratory.
    [Google Scholar]
  4. Angelone, M. and S.S.Labini
    : Overcoming Research Challenges for Geothermal Energy. Energy Research Knowledge Centre (ERKC), European Commission. p. 36–36, (2014).
    [Google Scholar]
  5. Uihlein, A. and Sigfusson, B.
    [2015] 2015 JRC Geothermal Energy Status Report. p. 60.
    [Google Scholar]
  6. Timoshkin, I.V., Mackersie, J.W. and MacGregor, S.J
    . [2003] Plasma channel microhole drilling technology. IEEE in 14th IEEE International Pulsed Power Conference. Dallas, Texas, 15-18 June.
    [Google Scholar]
  7. Teodoriu, C
    . [2011] Use of Downhole Mud-Driven Hammer for Geothermal Applications, in 37th Workshop on Geothermal Reservoir Engineering. Stanford University, Stanford, California, January 30 -February1.
    [Google Scholar]
  8. Anders, E., Lehmann, F. and Voigt, M
    . [2015] Electric Impulse Technology-Long Run Drilling in Hard Rocks, in ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering OMAE2015. St. John's, Newfoundland, Canada, May 31-June5.
    [Google Scholar]
  9. Rudolf von Rohr, P., Kant, M.A. and Rossi, E
    . [2017] An apparatus for thermal spallation of a borehole, Patent EP17188149.3.
    [Google Scholar]
  10. Kant, M.A., Rossi, E., Duss, J., Amann, F., Saar, M.O. and Rudolf von Rohr, P
    . [2018] Demonstration of thermal borehole enlargement to facilitate controlled reservoir engineering for deep geothermal, oil or gas systems. Applied Energy, 212, 1501–1509.
    [Google Scholar]
  11. Preston, F., White, H
    . [1938] Observations on spalling. Journal of Americal Ceramic Society, 17, 137–144.
    [Google Scholar]
  12. Wilkinson, M. and Tester, J
    . [1993] Experimental measurement of surface temperatures during flame-jet induced thermal spallation. Rock Mechanics and Rock Engineering, 26(1), 29–62.
    [Google Scholar]
  13. Williams, R.E., Potter, R.M. and Miska, S.S
    . [1996] Experiments in Thermal Spallation of Various Rocks. Energy Resources Technology, 118(1), 2–8.
    [Google Scholar]
  14. Rossi, E., Kant, M.A., Madonna, C., Saar, M.O. and Rudolf von Rohr, P
    . [2018] The effects of high heating rate and high temperature on the rock strength: Feasibility study of a thermally assisted drilling method. Rock Mechanics and Rock Engineering, 51(9), 2957–2964.
    [Google Scholar]
  15. Nasseri, M.H., Schubnel, A., Benson, P.M. and Young, R.P
    . [2009] Common evolution of mechanical and transport properties in thermally cracked westerly granite at elevated hydrostatic pressure. Pure and Applied Geophysics, 166(5–7)
    [Google Scholar]
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