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Replicate ice-coring system architecture: mechanical design

  • Christopher J. Gibson (a1), Jay A. Johnson (a1), Alexander J. Shturmakov (a1), Nicolai B. Mortensen (a1) and Joshua J. Goetz (a1)...
Abstract

The replicate ice-coring system was developed by Ice Drilling Design and Operations (IDDO) for the US National Science Foundation. The design of the system leverages the existing infrastructure of the deep ice-sheet coring (DISC) drill to create a steerable drill capable of recovering replicate core at any targeted depth in an existing borehole. Critical requirements of the system include: collecting up to 400 m of core from the high side of an open hole; maintaining access to the entire borehole for logging tools; collecting up to four cores at a single depth; and operating to a depth of 4000m at −55°C and 34 MPa. The system was developed and tested from 2010 through 2012 and integrates several new mechanical subsystems, including two electromechanical actuators capable of pushing the sonde to any targeted azimuth, new reduced diameter core and screen barrels made from off-the-shelf casing tube, and new cutter heads optimized for the multiple stages of the replicate coring procedure. The system was successfully deployed at West Antarctic Ice Sheet (WAIS) Divide in the 2012/13 field season, recovering 285 m of core from five intentional deviations at four target depths.

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References
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Johnson, JA, Mortensen, NB, Gibson, CJ, Goetz, JJ and Shturmakov, AJ (2014) Replicate ice-coring system testing. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A034) (see paper in this issue)
Mason, WP, Shturmakov, AJ, Johnson, JA and Haman, S (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 2. Mechanical design. Ann. Glaciol., 47, 3540 (doi: 10.3189/172756407786857640)
Mortensen, NB, Sendelbach, PJ and Shturmakov, AJ (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 3. Control, electrical and electronics design. Ann. Glaciol., 47, 4150 (doi: 10.3189/172756407786857668)
Mortensen, NB, Johnson, JA and Shturmakov, AJ (2014a) Precision cable winch level wind for deep ice-coring systems. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A013) (see paper in this issue)
Mortensen, NB, Goetz, JJ, Gibson, CJ, Johnson, JA and Shturmakov, AJ (2014b) Replicate ice-coring system architecture: electrical,electronic and software design. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A014) (see paper in this issue)
Shturmakov, AJ and Sendelbach, PJ (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 4. Drill cable. Ann. Glaciol., 47, 5153
Shturmakov, AJ, Lebar, DA, Mason, WP and Bentley, CR (2007) A new 122 mm electromechanical drill for deep ice-sheet coring (DISC): 1 . Design concepts. Ann. Glaciol., 47, 2834 (doi: 10.3189/172756407786857811)
Slawny, KR and 7 others (2014) Production drilling at WAIS Divide. Ann. Glaciol., 55(68) (doi: 10.3189/2014AoG68A018)
Tokle, V (2000) Apparatus for directional drilling. Int. Patent Appl. WO 2000034616 A1. Devico, Melhus
Vasiliev, NI, Talalay, P and Vostok Deep Ice Core Drilling Parties (2011) Twenty years of drilling the deepest hole in ice. Sci. Drilling, 11, 4145 (doi: 10.2204/iodp.sd.11.05.2011)
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Annals of Glaciology
  • ISSN: 0260-3055
  • EISSN: 1727-5644
  • URL: /core/journals/annals-of-glaciology
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