US3112799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coring fluid
Assignee: Jersey Production Research Co
•
Filing: 1960-03-09
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Granted: 1963-12-03
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Julius P Gallus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:22
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS WHEREIN A ROCK CORE IS CUT FROM A SUBTERRANEAN FORMATION ON WHICH POLYVALENT IONS ARE PRESENT BY MEANS OF A CORE BIT AND IS THEREAFTER ENCASED IN A CORE BARREL, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID CORE AS THE CORE SURFACES ARE EXPOSED BY SAID BIT WITH A SHEAR-STABLE LATEX CONTAINING AN OIL-RESISTANT FILM-FORMING ELASTOMER COAGULABLE IN THE PRESENCE OF POLYVALENT IONS AND FROM ABOUT 0.005 TO ABOUT 2.0 ST. PERCENT, BASED UPON SAID LATEX, OF AN OIL-INSOLUBLE, WATER-DISPERSIBLE POLYMER READILY ADSORBED ON SUBSURFACE STRATA, SAID POLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 50,000 STAUDINGER.
Claim 2
Dependent Claim
100 words
IN A PROCESS WHEREIN A ROCK CORE IS CUT FROM A SUBTERRANEAN FORMATION ON WHICH POLYVALENT IONS ARE PRESENT BY MEANS OF A CORE BIT AND IS THEREAFTER ENCASED IN A CORE BARREL, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID CORE AS THE CORE SURFACES ARE EXPOSED BY SAID BIT WITH A SHEAR-STABLE LATEX CONTAINING AN OIL-RESISTANT FILM-FORMING ELASTOMER COAGULABLE IN THE PRESENCE OF POLYVALENT IONS AND FROM ABOUT 0.005 TO ABOUT 2.0 ST. PERCENT, BASED UPON SAID LATEX, OF AN OIL-INSOLUBLE, WATER-DISPERSIBLE POLYMER READILY ADSORBED ON SUBSURFACE STRATA, SAID POLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 50,000 STAUDINGER.
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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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |