A method for driving sections in a strongly water-bearing layers and suitable drilling apparatus.

摘要

Drilling device for the production of freeze-dried bores in a strongly water-bearing layers with an outwardly - and inner pipe train (13, 14) driving a drilling machine (10), a drill mount (11) - and the outer and inner pipe train (13, 14) associated drill bit (15) which, with the inner pipe train (14) is releasably connected, characterised in that the tubes (18, 19) of the outer tube strand (13) from a low temperature steel and via a metallic connection (22) can be coupled to one another, that a with the inner pipe train (14) is detachably connected in an inner drilling crown (16) on the outside of the drill bit (17) can be locked and in that the drill bit (15) and a in the tube (18, 19) of the outer tube strand (13), which can be inserted sealing stopper (27) the outer tube strand (13) in addition to the inside and outside are formed in a sealing manner.