US3190370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive and feed device for a string of rotary drill string elements
Assignee: Craelius AB
•
Filing: 1962-04-17
•
Granted: 1965-06-22
•
Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Kvello-Aune Alf Gunnar
- 👤 Troften Per Fredrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:32
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B19/00; E21B19/08; E21B19/086; E21B7/00; E21B7/02; E21B7/022; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17666; Y10T279/17692; Y10T279/17743
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
DRIVE AND FEED DEVICE FOR A STRING OF ROTARY DRILL STRING ELEMENTS COMPRISING A FRAME, A FIRST DRILL CHUCK ROTATABLY MOUNTED AND CARRIED ON SAID FRAME AND OPERABLE INDEPENDENTLY TO ENGAGE AND TO DISENGAGE SAID DRILL STRING, A SECOND DRILL CHUCK ROTATABLY MOUNTED AND CARRIED ON SAID FRAME AXIALLY ALIGNED AND SPACED FROM SAID FIRST DRILL CHUCK AND OPERABLE INDEPENDENTLY THEREOF TO ENGAGE AND TO DISENGAGE SAID DRILL STRING, MEANS FOR POWER FEEDING AND FOR POWER RETRACTING AT LEAST ONE OF SAID CHUCK FORMING A POWER LINKAGE BETWEEN SAID ONE CHUCK AND THE FRAME, AN INDEPENDENTLY ROTATABLE TUBULAR SHAFT IN EACH CHUCK FORMING A PASSAGE FOR A DRILL STRING AND COUPLINGS BETWEEN THE DRILL STRING ELEMENTS, RADIAL OPENINGS IN SAID SHAFT, CHUCK JAWS OPERABLE THROUGH SAID OPENINGS TO ENGAGE A DRILL STRING EXTENDING THROUGH SAID SHAFT, POWER DRIVING MEANS FOR ROTATING SAID SHAFTS SELECTIVELY SIMULTANEOUSLY AND INDEPENDENTLY AT DIFFERENT SPEEDS FOR DRILLING, AND POWER CYLINDER MEANS IN SAID DRILL CHUCKS ADJACENT SAID JAWS FOR MOVEMENT THEREOF IN AND OUT OF SAID RADIAL OPENINGS FOR ENGAGING OR DISENGAGING DRILL STRING ELEMENTS.
Claim 2
Dependent Claim
180 words
DRIVE AND FEED DEVICE FOR A STRING OF ROTARY DRILL STRING ELEMENTS COMPRISING A FRAME, A FIRST DRILL CHUCK ROTATABLY MOUNTED AND CARRIED ON SAID FRAME AND OPERABLE INDEPENDENTLY TO ENGAGE AND TO DISENGAGE SAID DRILL STRING, A SECOND DRILL CHUCK ROTATABLY MOUNTED AND CARRIED ON SAID FRAME AXIALLY ALIGNED AND SPACED FROM SAID FIRST DRILL CHUCK AND OPERABLE INDEPENDENTLY THEREOF TO ENGAGE AND TO DISENGAGE SAID DRILL STRING, MEANS FOR POWER FEEDING AND FOR POWER RETRACTING AT LEAST ONE OF SAID CHUCK FORMING A POWER LINKAGE BETWEEN SAID ONE CHUCK AND THE FRAME, AN INDEPENDENTLY ROTATABLE TUBULAR SHAFT IN EACH CHUCK FORMING A PASSAGE FOR A DRILL STRING AND COUPLINGS BETWEEN THE DRILL STRING ELEMENTS, RADIAL OPENINGS IN SAID SHAFT, CHUCK JAWS OPERABLE THROUGH SAID OPENINGS TO ENGAGE A DRILL STRING EXTENDING THROUGH SAID SHAFT, POWER DRIVING MEANS FOR ROTATING SAID SHAFTS SELECTIVELY SIMULTANEOUSLY AND INDEPENDENTLY AT DIFFERENT SPEEDS FOR DRILLING, AND POWER CYLINDER MEANS IN SAID DRILL CHUCKS ADJACENT SAID JAWS FOR MOVEMENT THEREOF IN AND OUT OF SAID RADIAL OPENINGS FOR ENGAGING OR DISENGAGING DRILL STRING ELEMENTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |