US2634236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment for the correction of lost circulation of drilling fluids
Assignee: Lorum Fibre Co Inc
•
Filing: 1951-04-30
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Granted: 1953-04-07
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Expires: 1971-04-30
Abstract
No abstract record available.
Inventors
- 👤 Edgar K Simon
- 👤 Milton H Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:20
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A PROCESS FOR CORRECTING LOS CIRCULATION OF DRILLING FLUID DURING DRILLING OF A PETROLEUM WELL BORE COMPRISING ADMIXING FIBERIZED LEATHER WITH SAID DRILLING FLUID AND PUMPING THE RESULTING MIXTURE THROUGH SAID WELL BORE TO CONTACT THE LOST CIRCULATION ZONE WITHIN SAID WELL BORE.
Claim 2
Dependent Claim
43 words
A PROCESS FOR CORRECTING LOS CIRCULATION OF DRILLING FLUID DURING DRILLING OF A PETROLEUM WELL BORE COMPRISING ADMIXING FIBERIZED LEATHER WITH SAID DRILLING FLUID AND PUMPING THE RESULTING MIXTURE THROUGH SAID WELL BORE TO CONTACT THE LOST CIRCULATION ZONE WITHIN SAID WELL BORE.
References Cited (Backward Citations)
US2297660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |