Patent US3208524A successfully refreshed from Google Patents.
US3208524A
Expired / Lapsed
US
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Process for controlling lost circulation
Assignee: ExxonMobil Upstream Research Co
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Filing: 1960-09-26
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Granted: 1965-09-28
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Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Victor V Horner
- 👤 Richard E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/512; Y; Y10; Y10S; Y10S507/00; Y10S507/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR OVERCOMING LOST CIRCULATION DURING THE DRILLING OF A BOREHOLE WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION OF GALACTOMANNAN AT THE EARTH''S SURFACE, ADDING A CROSS-LINKING AGENT TO SAID SOLUTION IN A CONCENTRATION SUFFICIENT TO FORM A VISCOUS GEL CAPABLE OF PLUGGING VUGS AND FISSURES, AND INJECTING THE RESULTANT PREFORMED GEL INTO SAID BOREHOLE UNDER SUFFICIENT PRESSURE TO PLUG VUGS AND FISSURES IN THE SURROUNDING STRATA WITHOUT FRACTURING SAID STRATA.
Claim 2
Dependent Claim
71 words
A PROCESS FOR OVERCOMING LOST CIRCULATION DURING THE DRILLING OF A BOREHOLE WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION OF GALACTOMANNAN AT THE EARTH''S SURFACE, ADDING A CROSS-LINKING AGENT TO SAID SOLUTION IN A CONCENTRATION SUFFICIENT TO FORM A VISCOUS GEL CAPABLE OF PLUGGING VUGS AND FISSURES, AND INJECTING THE RESULTANT PREFORMED GEL INTO SAID BOREHOLE UNDER SUFFICIENT PRESSURE TO PLUG VUGS AND FISSURES IN THE SURROUNDING STRATA WITHOUT FRACTURING SAID STRATA.
References Cited (Backward Citations)
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US2224120A
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |