Device for drilling holes in the ground

Details Device for drilling holes in the ground Device for drilling holes in the ground

E - Fixed Constructions

21

B

255/12

E21B 4/00 (2006.01)

Patent

CA 2018060

DEVICE FOR DRILLING HOLES IN THE GROUND ABSTRACT The device for drilling holes in the ground compri- ses a body, a drive and a base member, connected with the body by means of a thread and provided a with a lug located on an external side surface. The lug is intended for locking the base member relative to the body and is projected beyond the latter. One of the sides is inclined to the generatrix of the side surface of the base member in the direction creating a turning-in moment at the connecting thread. Located on the base member side surface is an additional lug which creates a turning-in moment at the connecting thread in case the device is reversed. Fig. 2

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