Traction drum winch which exerts a predetermined constant tension on a cable
Abstract
Abstract A TRACTION DRUM WINCHING MECHANISM UTILIZING A STORAGE DRUM ON WHICH A SUBSTANTIALLY CONSTANT TENSION IS MAINTAINED TO REEL CABLE THEREONTO AT A TENSION LESS THAN THAT WHICH WILL CRUSH A CABLE. THIS ENABLES A CABLE OF LARGE DIAMETER TO BE WOUND ONTO A STORAGE DRUM WITHOUT CRUSHING. WATER COOLED CLUTCHES AND BRAKES ARE PROVIDED TO ENABLE THE CLUTCHES AND BRAKES TO BE SLIPPED CONTINUOUSLY OVER AN INDEFINITE PERIOD OF TIME WITHOUT HEATING, AND A SENSING MECHANISM IS PROVIDED FOR SENSING THE WEIGHT OF THE DRILLING PIPE TO ENABLE DRILLING TO BE CONTINUED FROM A BARGE, DRILL SHIP OR VESSEL, WHICH VESSEL IS BEING SUBJECTED TO RISE AND FALL DUE TO WAVES, WHILE MAINTAINING CONSTANT TENSION ON THE PIPE WITHOUT THE MOVEMENT OF THE DRILL SHIP OR VESSEL INTERFERING WITH THE DRILLING OF THE BORE HOLE. PROVISION IS MADE TO SPOOL THE CONVOLUTIONS OF CABLE IN SIDE BY SIDE RELATION WITH A SLIGHT CROWD ANGLE, BY MEANS OF A HYDRAULICALLY ACTUATED CABLE SPOOLING DEVICE.
Inventors
- 👤 John Hart Wilson
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |