US2802783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling fluid
Assignee: Texaco Inc
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Filing: 1956-07-09
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Granted: 1957-08-13
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Expires: 1976-07-09
Abstract
No abstract record available.
Inventors
- 👤 Walter J Weiss
- 👤 Wilbur L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:21
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22; C09K8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN AQUEOUS DRILLING FLUID COMPRISING AN ALKALINE AQUEOUS PHASE WHICH CONSISTS ESSENTIALLY OF A SATURATED AQUEOUS CALCIUM HYDROXIDE SOLUTION AND A WATER-SOLUBLE CALCIUM SALT WHICH HAS A SOLUBILITY IN SAID AQUEOUS PHASE GREATER THAN THAT OF CALCIUM HYDROXIDE DISSOLVED THEREIN TO YIELD A CALCIUM ION CONCENTRATION IN SAID AQUEOUS PHASE OF AT LEAST 200 PARTS PER MILLION BY WEIGHT AND SUFFICIENT TO EFFECTIVELY STABILIZE AND CONTROL THE MUD-MAKING PROPERTIES OF HEAVING SHALE MATERIAL IN CONTACT WITH THE DRILLING FLUID, SAID AQUEOUS PHASE HAVING A PH NOT GREATER THAN 12.6.
Claim 2
Dependent Claim
89 words
AN AQUEOUS DRILLING FLUID COMPRISING AN ALKALINE AQUEOUS PHASE WHICH CONSISTS ESSENTIALLY OF A SATURATED AQUEOUS CALCIUM HYDROXIDE SOLUTION AND A WATER-SOLUBLE CALCIUM SALT WHICH HAS A SOLUBILITY IN SAID AQUEOUS PHASE GREATER THAN THAT OF CALCIUM HYDROXIDE DISSOLVED THEREIN TO YIELD A CALCIUM ION CONCENTRATION IN SAID AQUEOUS PHASE OF AT LEAST 200 PARTS PER MILLION BY WEIGHT AND SUFFICIENT TO EFFECTIVELY STABILIZE AND CONTROL THE MUD-MAKING PROPERTIES OF HEAVING SHALE MATERIAL IN CONTACT WITH THE DRILLING FLUID, SAID AQUEOUS PHASE HAVING A PH NOT GREATER THAN 12.6.
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |