Title:
TURBO-DRILL
Document Type and Number:
WIPO Patent Application WO/1981/000428
Kind Code:
A1
Abstract:
A turbo-drill comprising a casing (1) with an opening (3) in its side wall, a multistage turbine and a hollow shaft (6) mounted in the casing (1) on radial supports (10) and an axial support (11). The inside chamber (7) of the shaft (6) is interconnected hydraulically to the hollow of the drill pipe string (2) and to a chamber (15) located above the nozzles of the boring bit (13). In the annular space between the casing (1) and the shaft (6) are mounted seals (16 and 17) isolating the hollow (12) of the axial support (11) from the drilling mud.
Inventors:
IONESYAN Y (SU)
POPKO V (SU)
SUBKHANGULOV R (SU)
POPKO V (SU)
SUBKHANGULOV R (SU)
Application Number:
PCT/SU1979/000059
Publication Date:
February 19, 1981
Filing Date:
July 27, 1979
Export Citation:
Assignee:
INST BUROVOI TEKHNIK
IONESYAN Y
POPKO V
SUBKHANGULOV R
IONESYAN Y
POPKO V
SUBKHANGULOV R
International Classes:
E21B4/00; E21B4/02; E21B4/14; F03B13/02; (IPC1-7): E21B4/02
Foreign References:
| SU243534A1 | ||||
| SU539135A1 | 1976-12-15 | |||
| US3807513A | 1974-04-30 | |||
| SU121102A1 |
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