US3193011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for restoring lost circulation
Assignee: ExxonMobil Upstream Research Co
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Filing: 1962-05-18
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Granted: 1965-07-06
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 James A Rickard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR RESTORING LOST DRILLING FLUID CIRCULATION IN A BOREHOLE CONTAINING A ZONE OF LOST CIRCULATION EXTENDING LATERALLY FROM THE BOREHOLE IN A CRACKED FORMATION COMPRISING THE STEPS OF: ADDING TO A FLUIDS CAPABLE OF BEING CIRCULATED IN SAID BOREHOLD SMALL, SOLID PARTICLES CONSISTING ESSENTIALLY OF PARTIALLY POLYMERIZED THERMOSETTING PLASTIC GRANULES ADAPTED TO SET AT BOREHOLE TEMPERATURES; DISPLACING SAID PARTICLES RADIALLY OUTWARDLY FROM SAID WELL BORE INTO SAID ZONE OF FLUID LOSS IN SAID CRACKED FORMATION; AND
Claim 2
Independent Claim
78 words
A METHOD FOR RESTORING LOST DRILLING FLUID CIRCULATION IN A BOREHOLE CONTAINING A ZONE OF LOST CIRCULATION EXTENDING LATERALLY FROM THE BOREHOLE IN A CRACKED FORMATION COMPRISING THE STEPS OF: ADDING TO A FLUIDS CAPABLE OF BEING CIRCULATED IN SAID BOREHOLD SMALL, SOLID PARTICLES CONSISTING ESSENTIALLY OF PARTIALLY POLYMERIZED THERMOSETTING PLASTIC GRANULES ADAPTED TO SET AT BOREHOLE TEMPERATURES; DISPLACING SAID PARTICLES RADIALLY OUTWARDLY FROM SAID WELL BORE INTO SAID ZONE OF FLUID LOSS IN SAID CRACKED FORMATION; AND
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |