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Record #129678:
Effect of a heated drilling bit and borehole liquid on thermoelastic stresses in an ice core / O.V. Nagornov, V.S. Zagorodnov, J.J. Kelley.
Title: | Effect of a heated drilling bit and borehole liquid on thermoelastic stresses in an ice core / O.V. Nagornov, V.S. Zagorodnov, J.J. Kelley. |
Author(s): | Nagornov, O. V. Zagorodnov, V. S. Kelley, J. J. |
Date: | 1994. |
In: | National Institute of Polar Research. Memoirs. Special Issue. (1994.), Vol. 49 (1994) |
Abstract: | Investigates effect of heat transfer during thermal electric drilling, resulting in heat fracture. Prototype drill was tested. Experimental studies and model simulations show that thermal stresses in ice cores are proportional to ratio of length of drilling bit to rate of penetration. Maximal thermal stresses exhibit only weak dependence on type of borehole liquid. |
Notes: | National Institute of Polar Research. Memoirs. Special Issue. Vol. 49 :314-326 (1994). |
Keywords: | 551.32 -- Glaciology. 551.321 -- Glaciological methods and instruments. 551.321.2 -- Snow and ice, methods of sampling, excavating, drilling, etc. 622.233 -- Drills and drilling, ice and snow sampling. 622.234.2 -- Ice and snow, thermal boring. 551.324 -- Land ice. 53 -- Physics. 539.42 -- Ice, tensile strength. 622.14 -- Core sampling, ice and snow. E4 -- Glaciology: physics and chemistry of ice. |
SPRI record no.: | 129678 |
LDR 01664naa#a2200000#a#4500 001 SPRI-129678 005 20240328193846.0 007 ta 008 240328s1994####xx#a##|##|###|0||#0|eng#d 035 ## ‡aSPRI-129678 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aNagornov, O. V. 245 10 ‡aEffect of a heated drilling bit and borehole liquid on thermoelastic stresses in an ice core /‡cO.V. Nagornov, V.S. Zagorodnov, J.J. Kelley. 260 ## ‡a[S.l.] :‡b[s.n.],‡c1994. 300 ## ‡ap. 314-326 :‡bill., diags., table. 500 ## ‡aNational Institute of Polar Research. Memoirs. Special Issue. Vol. 49 :314-326 (1994). 520 3# ‡aInvestigates effect of heat transfer during thermal electric drilling, resulting in heat fracture. Prototype drill was tested. Experimental studies and model simulations show that thermal stresses in ice cores are proportional to ratio of length of drilling bit to rate of penetration. Maximal thermal stresses exhibit only weak dependence on type of borehole liquid. 650 07 ‡a551.32 -- Glaciology.‡2udc 650 07 ‡a551.321 -- Glaciological methods and instruments.‡2udc 650 07 ‡a551.321.2 -- Snow and ice, methods of sampling, excavating, drilling, etc.‡2udc 650 07 ‡a622.233 -- Drills and drilling, ice and snow sampling.‡2udc 650 07 ‡a622.234.2 -- Ice and snow, thermal boring.‡2udc 650 07 ‡a551.324 -- Land ice.‡2udc 650 07 ‡a53 -- Physics.‡2udc 650 07 ‡a539.42 -- Ice, tensile strength.‡2udc 650 07 ‡a622.14 -- Core sampling, ice and snow.‡2udc 650 07 ‡aE4 -- Glaciology: physics and chemistry of ice.‡2local 700 1# ‡aZagorodnov, V. S. 700 1# ‡aKelley, J. J. 773 0# ‡7nnas ‡tNational Institute of Polar Research. Memoirs. Special Issue. ‡gVol. 49 (1994) ‡wSPRI-42956 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240328