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1. (WO2018121815) DRILLING DEVICE

Pub. No.:    WO/2018/121815    International Application No.:    PCT/DE2017/101106
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Thu Dec 28 00:59:59 CET 2017
IPC: E21B 43/29
E21B 7/14
E21B 7/16
E21B 7/18
E21B 10/60
Applicants: HOCHSCHULE BOCHUM
Inventors: HAHN, Simon
HARTUNG, Viktor
Title: DRILLING DEVICE
Abstract:
The invention relates to a drilling device (1) for hard rock using a fluid, having at least one drill head (2) with a pre-chamber (8) and a mixing chamber (3) where at least one front-facing nozzle (4) and at least one rear-facing nozzle (7) are provided. The fluid is mixed with abrasives in the mixing chamber, and the fluid together with the abrasives exits from the front-facing nozzle or an opening. The fluid flow is separated in the region of the pre-chamber, abrasive-free fluid exits the rear-facing nozzles, abrasives and the abrasive-free fluid are mixed in the mixing chamber, and the fluid mixed with the abrasives exits from the front-pacing nozzle or an opening.