US3289762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple fracturing in a well
Assignee: Halliburton Co
•
Filing: 1963-12-26
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Granted: 1966-12-06
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Expires: 1983-12-26
Abstract
No abstract record available.
Inventors
- 👤 Schell Dwight
- 👤 Irmal J Wallen
- 👤 James E Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:16
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD FOR TREATING AN UPPER FORMATION AND A LOWER FORMATION IN A WELL COMPRISING LOWERING TUBING IN THE WELL, SAID TUBING HAVING A BAFFLE THEREIN SPACED ABOVE THE LOWER END OF THE TUBING, POSITIONING THE BAFFLE BETWEEN SAID UPPER AND LOWER FORMATIONS, CEMENTING THE TUBING IN THE WELL, FRACTURING THE LOWER FORMATION, PERFORATING THE TUBING OPPOSITE THE UPPER FORMATION, FRACTURING THE UPPER FORMATION WITH A FREE PLUG PLACED ON THE BAFFLE TO BLOCK FLUID PRESSURE COMMUNICATION TO THE LOWER FORMATION, SAID PLUG HAVING BEEN PLACED AFTER FRACTURING THE
Claim 2
Independent Claim
89 words
A METHOD FOR TREATING AN UPPER FORMATION AND A LOWER FORMATION IN A WELL COMPRISING LOWERING TUBING IN THE WELL, SAID TUBING HAVING A BAFFLE THEREIN SPACED ABOVE THE LOWER END OF THE TUBING, POSITIONING THE BAFFLE BETWEEN SAID UPPER AND LOWER FORMATIONS, CEMENTING THE TUBING IN THE WELL, FRACTURING THE LOWER FORMATION, PERFORATING THE TUBING OPPOSITE THE UPPER FORMATION, FRACTURING THE UPPER FORMATION WITH A FREE PLUG PLACED ON THE BAFFLE TO BLOCK FLUID PRESSURE COMMUNICATION TO THE LOWER FORMATION, SAID PLUG HAVING BEEN PLACED AFTER FRACTURING THE
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |