Direct drive for deep-well drilling
US4485880A · kind A · utility
7Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1983 |
| Grant date | Dec 4, 1984 |
| Priority date | — |
| Expiry date | Aug 1, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/7018
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A direct drive for deep-well drill bits on the Moineau displacement principle is provided with locking means detents (10, 11) which are disposed downstream of the working chambers (4) of rotor (3) and stator (2). Actuation of the locking means is effected by coupling throw-in members (13) introduced through the flushing passage from above. Passage through the working chambers and into the locking means detents groove (16, 20, 21) is rendered possible for the throw-in members on relative rotation of rotor and stator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.