Process and apparatus for cementing offshore support members
Abstract
Abstract THE SPECIFICATION DISCLOSES A PROCESS AND APPARATUS FOR CEMENTING IN TWO STAGES AN ANNULUS FORMED BETWEEN AN OFFSHORE SUPPORT MEMBER AND A PILE DRIVEN THERETHROUGH. THE SUPPORT MEMBER IS PROVIDED WITH A FIRST PORT WHICH NORMALLY LIES ADJACENT THE MUDLINE WHEN THE SUPPORT MEMBER IS IN POSITION AND A SECOND PORT VERTICALLY SPACED UPWARD FROM THE FIRST PORT. A BATCH OF QUICK-SETTING CEMENT MATERIAL, E.G., GYPSUM CEMENT MIXTURES, IS PUMPED THROUGH THE FIRST PORT TO FILL THE ANNULUS TO A LEVEL APPROXIMATELY ADJACENT THE SECOND PORT. THIS MATERIAL IS ALLOWED TO SET TO FORM A SEAL AT THE LOWER END OF THE ANNULUS AND THEN ADDITIONAL CEMENT MATERIAL IS PUMPED THROUGH THE SECOND PORT TO FINISH FILLING THE ANNULUS.
Inventors
- 👤 Elmo M Blount
- 👤 Joseph U Messenger
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |