Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Geophysical prospecting
3 (1955), S. 0
ISSN:
1365-2478
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
,
Physics
Notes:
In the development of seismic drilling methods in Northern Italy the most important considerations have been those of ease in transport and quickness of operation. Different drilling systems are described that are adapted to the different types of near surface formation that are encountered in the area. In soft sands a high pressure water jet is used, a rotary table not being required in a great many cases. In medium consistency sand and small gravel, the drill rods are rotated by a special roller wrench equipment instead of the more usual kelly. In coarse formations, gravel and boulders, casing is driven by special pile driving equipment with collapsible mast for easy transport.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2478.1955.tb01388.x
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