|Title||Electromechanical Drilling in Dry Holes to Medium Depths|
|Author(s)||Jakob Schwander , Heinrich Rufli|
Ice Core Drilling. Proceedings of the Third International Workshop on Ice Drilling Technology (eds C. Rado and D. Beaudoing)
The maximum depth for ice core drilling in dry holes is limited due to bore hole closure by the action of the hydrostatic pressure and the difficulty to obtain unbroken cores below a certain depth. In this paper we discuss the various sources of stress that act on the core and the consequences for the design of mechanical ice core drills. We present the latest version of our mechanical drill system which has been modified to produce better cores from greater depths.
|Special Collections||International Workshop on Ice Drilling Technology Series, 3rd International Workshop on Ice Drilling Technology|
|Categories||Borehole Closure, Brittle Ice, Drill Heads|
|Equipment||Shallow EM drills|
|Citation||Jakob Schwander , Heinrich Rufli ( 1988 ) Electromechanical Drilling in Dry Holes to Medium Depths. Ice Core Drilling. Proceedings of the Third International Workshop on Ice Drilling Technology (eds C. Rado and D. Beaudoing) , 32-37 .|