Title:
DRILLING DEVICE COMPRISING A DRIVE BODY WITH NOZZLES
Document Type and Number:
WIPO Patent Application WO2002090707
Kind Code:
A3
Abstract:
The invention relates to a device for producing or expanding drill holes in a wet drilling method, wherein said device is provided with a drive body with nozzles, which is connected to a pull and/or thrust drive, said nozzles being movably arranged, thereby having a larger working area in comparison with stationary nozzles and a more intensive drilling force.
Inventors:
BAYER HANS-JOACHIM (DE)
Application Number:
PCT/EP2002/004882
Publication Date:
October 09, 2003
Filing Date:
May 03, 2002
Export Citation:
Assignee:
TRACTO TECHNICK GMBH (DE)
BAYER HANS-JOACHIM (DE)
BAYER HANS-JOACHIM (DE)
International Classes:
E21B7/04; E21B10/60; E21B10/61; (IPC1-7): E21B7/04; E21B10/60
Foreign References:
| US4739845A | 1988-04-26 | |||
| US4871037A | 1989-10-03 | |||
| GB2351302A | 2000-12-27 | |||
| US4668018A | 1987-05-26 | |||
| US3111179A | 1963-11-19 | |||
| US2783972A | 1957-03-05 | |||
| US5794719A | 1998-08-18 |
Other References:
"NOZZLE FOR ROTARY DOWNHOLE DRILL BIT", RESEARCH DISCLOSURE, KENNETH MASON PUBLICATIONS, HAMPSHIRE, GB, no. 374, 1 June 1995 (1995-06-01), pages 418, XP000519449, ISSN: 0374-4353
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