US2748079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluids
Assignee: Texaco Development Corp
•
Filing: 1950-09-06
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Granted: 1956-05-29
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Expires: 1970-09-06
Abstract
No abstract record available.
Inventors
- 👤 Walter J Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A BRINE BASE OIL EMULSION TYPE OF DRILLING FLUID FOR DRILLING THROUGH SUBSURFACE FORMATIONS CHARACTERIZED BY ITS RESISTANCE TO CONTAMINATION BY CALCIUM IONS AND SALTS, SAID FLUID COMPRISING A SUBSTANTIALLY SATURATED WATER SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SALTS, SAID SATURATED SOLUTION CONTAINING OIL EMULSIFIED THEREIN AS AN OIL-IN-BRINE EMULSION AND INCLUDING SAPONIN IN AN AMOUNT EFFECTIVE TO STABILIZE THE EMULSION OF OIL-IN-BRINE.
Claim 2
Dependent Claim
73 words
A BRINE BASE OIL EMULSION TYPE OF DRILLING FLUID FOR DRILLING THROUGH SUBSURFACE FORMATIONS CHARACTERIZED BY ITS RESISTANCE TO CONTAMINATION BY CALCIUM IONS AND SALTS, SAID FLUID COMPRISING A SUBSTANTIALLY SATURATED WATER SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL SALTS, SAID SATURATED SOLUTION CONTAINING OIL EMULSIFIED THEREIN AS AN OIL-IN-BRINE EMULSION AND INCLUDING SAPONIN IN AN AMOUNT EFFECTIVE TO STABILIZE THE EMULSION OF OIL-IN-BRINE.
References Cited (Backward Citations)
US2336171A
Cited
US2371955A
Cited
US2497398A
Cited
US2551768A
Cited
US2582323A
Cited
US2555794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |