US3279543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tool for removing sand
Assignee: Shell USA Inc
•
Filing: 1964-01-30
•
Granted: 1966-10-18
•
Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 Edward D Yetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
E; E21; E21B; E21B37/00; E21B23/00; E21B23/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A SAND-REMOVAL WELL TOOL ADAPTED TO BE PUMPED DOWN A PIPE STRING WITHIN A WELL, SAID STRING OF PIPE HAVING A LOWER OPEN END AND SHOULDER MEANS POSITIONED THEREIN TO PREVENT THE PASSAGE OF A WELL TOOL THERETHROUGH, SAID WELL TOOL COMPRISING: (A) A BODY MEMBER OF A DIAMETER SMALL ENOUGH TO PASS THROUGH THE PIPE STRING IN THE WELL AND ADAPTED TO BE STOPPED BY SAID SHOULDER MEANS OF SAID PIPE STRING; (B) A PLURALITY OF TUBULAR INDIVIDUALLY TELESCOPING SECTIONS CONNECTED END TO END AND HAVING THE END OF ONE OF SAID TELESCOPING SECTIONS CONNECTED TO THE LOWER END OF SAID BODY MEMBER; AND (C) FLEXIBLE JOINT MEANS INTERCONNECTING ADJACENT TUBULAR TELESCOPING SECTIONS TO PERMIT SAID TOOL TO PASS THROUGH CURVED SECTIONS OF SAID STRING OF PIPE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |