Method and apparatus for installing guidelines at underwater wellheads
Abstract
Abstract THERE IS PROVIDED A SIMPLE, RELIABLE AND COMPACT MEMBER HAVING A PLUG-IN PORTION THAT PLUGS INTO AN UNDERWATER GUIDE POST, AND, RELEASABLY FIXED TO AN UPPER PART THEREOF, THERE IS A COIL OF RELATIVELY LIGHT LINE ENCLOSED WITHIN A CAN. ONE END OF THE LINE IS CONNECTED DIRECTLY TO A BUOY AND THE OTHER END IS ALSO CONNECTED TO THE SAME BUOY AFTER THE END PASSES THROUGH A PULLEY MOUNTED ONTO THE PLUG-IN PORTION. THE COMPACT MEMBER IS ADAPTED TO BE PLUGGED INTO THE GUIDE POST BY A SUBMARINE THAT AFTERWARDS RELEASES THE BUOY AND COIL OF LINE FROM THE PLUG-IN PORTION. ON THE SURFACE, A WORKING FUIDELINE IS FIXED TO ONE END OF THE LIGHT LINE AND THE GUIDELINE IS PULLED AND SECURED TO THE PLUG-IN PORTION BY PULLING ON THE OTHER END OF THE LIGHT LINE. MEANS ARE INCORPORATED IN THE PLUG-IN PORTION TO ALLOW IT TO BE RELEASED FROM THE GUIDE POST BY PULLING ON A GUIDELINE WITH A FORCE GREATER THAN THE THRESHOLD FORCE BUILT INTO THE SYSTEM.
Inventors
- 👤 Walter Brown
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |