US3331437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead assembly
Assignee: Cooper Industries LLC
•
Filing: 1965-01-06
•
Granted: 1967-07-18
•
Expires: 1985-01-06
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:45
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; E21B33/076; E21B43/00; E21B43/01; E21B43/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
AN UNDERWATER WELLHEAD ASSEMBLY, COMPRISING AN UNDERWATER WELLHEAD, INCLUDING A BASE AND A CHRISTMAS TREE MOUNTED ON THE BASE, HAVING A VERTICAL BORE THROUGH WHICH WELL FLUID CAN FLOW FROM THE WELL AND THROUGH WHICH WELL TOOLS CAN BE INTRODUCED INTO THE WELL FOR VARIOUS OPERATIONS INCLUDING BUT NOT LIMITED TO SWABBING TO INDUCE FLOW, A FLOW LINE HAVING ONE END NEAR THE CHRISTMAS TREE FOR CONDUCTING FLUIDS AWAY FROM THE CHRISTMAS TREE TO A LOCATION REMOTE THEREFROM, A GENTLY CURVING CONNECTOR HAVING ONE END CONNECTED TO THE END OF THE FLOW LINE NEAR THE CHRISTMAS TREE AND ONE END RELEASABLY CONNECTED TO THE VERTICAL BORE OF THE CHRISTMAS TREE TO ALLOW FLUID TO FLOW FROM THNE CHRISTMAS TREE TO THE FLOW LINE AND WELL TOOLS TO BE PUMPED IN AND OUT OF THE WELL THROUGH THE FLOW LINE AND CHRISTMAS TREE, AND MEANS, INCLUDING A BYPASS LINE HAVING ITS OPPOSITE ENDS CONNECTED INTO THE SIDES OF THE FLOW LINE AND THE BORE OF THE CHRISTMAS TREE, RESPECTIVELY, TO ALLOW FLUID TO FLOW THEREBETWEEN WHEN THE CONNECTOR IS DISCONNECTED FROM THE CHRISTMAS TREE TO ALLOW OPERATIONS SUCH AS SWABBING FROM DIRECTLY ABOVE THE WELLHEAD.
Claim 2
Dependent Claim
194 words
AN UNDERWATER WELLHEAD ASSEMBLY, COMPRISING AN UNDERWATER WELLHEAD, INCLUDING A BASE AND A CHRISTMAS TREE MOUNTED ON THE BASE, HAVING A VERTICAL BORE THROUGH WHICH WELL FLUID CAN FLOW FROM THE WELL AND THROUGH WHICH WELL TOOLS CAN BE INTRODUCED INTO THE WELL FOR VARIOUS OPERATIONS INCLUDING BUT NOT LIMITED TO SWABBING TO INDUCE FLOW, A FLOW LINE HAVING ONE END NEAR THE CHRISTMAS TREE FOR CONDUCTING FLUIDS AWAY FROM THE CHRISTMAS TREE TO A LOCATION REMOTE THEREFROM, A GENTLY CURVING CONNECTOR HAVING ONE END CONNECTED TO THE END OF THE FLOW LINE NEAR THE CHRISTMAS TREE AND ONE END RELEASABLY CONNECTED TO THE VERTICAL BORE OF THE CHRISTMAS TREE TO ALLOW FLUID TO FLOW FROM THNE CHRISTMAS TREE TO THE FLOW LINE AND WELL TOOLS TO BE PUMPED IN AND OUT OF THE WELL THROUGH THE FLOW LINE AND CHRISTMAS TREE, AND MEANS, INCLUDING A BYPASS LINE HAVING ITS OPPOSITE ENDS CONNECTED INTO THE SIDES OF THE FLOW LINE AND THE BORE OF THE CHRISTMAS TREE, RESPECTIVELY, TO ALLOW FLUID TO FLOW THEREBETWEEN WHEN THE CONNECTOR IS DISCONNECTED FROM THE CHRISTMAS TREE TO ALLOW OPERATIONS SUCH AS SWABBING FROM DIRECTLY ABOVE THE WELLHEAD.
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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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |