US3448799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well completion apparatus
Assignee: Cooper Industries LLC
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Filing: 1961-08-09
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Granted: 1969-06-10
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Ahlstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:42
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B43/013; E21B41/00; E21B41/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
WELL COMPLETION APPARATUS, COMPRISING A UNDERWATER WELLHEAD INCLUDING A BASE AND A CHRISTMAS TREE REMOVABLY MOUNTED ON THE BASE AND HAVING AN OUTLET, A U-TUBE, MEANS SUPPORTING THE U-TUBE WITH ITS OPPOSITE ENDS FACING UPWARDLY AND SUBSTANTIALLY PARALLEL TO AND LATERALLY OFFSET FROM THE CHRISTMAS TREE, MEANS CONNECTING THE OUTLET FROM THE CHRISTMAS TREE WITH ONE END OF THE U-TUBE TO PROVIDE FLUID COMMUNICATION BETWEEN SAID CHRISTMAS TREE AND THE U-TUBE, A FLOWLINE, MEANS FOR LOWERING ONE END OF THE FLOWLINE INTO ALIGNMENT WITH THE OTHER END OF THE U-TUBE, AND MEANS FOR RELEASABLY CONNECTING THE ONE END OF THE FLOWLINE TO SAID OTHER END OF THE U-TUBE WHEN THEY ARE SO ALIGNED.
Claim 2
Dependent Claim
113 words
WELL COMPLETION APPARATUS, COMPRISING A UNDERWATER WELLHEAD INCLUDING A BASE AND A CHRISTMAS TREE REMOVABLY MOUNTED ON THE BASE AND HAVING AN OUTLET, A U-TUBE, MEANS SUPPORTING THE U-TUBE WITH ITS OPPOSITE ENDS FACING UPWARDLY AND SUBSTANTIALLY PARALLEL TO AND LATERALLY OFFSET FROM THE CHRISTMAS TREE, MEANS CONNECTING THE OUTLET FROM THE CHRISTMAS TREE WITH ONE END OF THE U-TUBE TO PROVIDE FLUID COMMUNICATION BETWEEN SAID CHRISTMAS TREE AND THE U-TUBE, A FLOWLINE, MEANS FOR LOWERING ONE END OF THE FLOWLINE INTO ALIGNMENT WITH THE OTHER END OF THE U-TUBE, AND MEANS FOR RELEASABLY CONNECTING THE ONE END OF THE FLOWLINE TO SAID OTHER END OF THE U-TUBE WHEN THEY ARE SO ALIGNED.
References Cited (Backward Citations)
US3052299A
Cited
US3022822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |