US2805991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling muds
Assignee: Gulf Oil Corp
•
Filing: 1954-10-28
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Granted: 1957-09-10
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Expires: 1974-10-28
Abstract
No abstract record available.
Inventors
- 👤 Rodolfo J Tailleur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:13
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/26; C09K8/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A DRILLING MUD OF ENHANCED LUBRICATING PROPERTIES COMPRISING AN OIL-IN-WATER EMULSION CONTAINING CLAY SOLIDS, AN OIL PHASE OF FROM 2 TO 40 PERCENT BY VOLUME OF SAID MUD, AND A WATER-INSOLUBLE, PREFERENTIALLY OIL-WETTABLE INORGANIC SULFIDE SELECTED FROM THE GROUP CONSISTING OF THE SULFIDES OF ARSENIC, ANTIMONY, BISMUTH, LEAD, ZINC, IRON, CADMIUM, COPPER, MOLYBDENUM AND MERCURY IN AN AMOUNT, FROM ABOUT 1.25 TO 20 PERCENT BY WEIGHT OF THE OIL PHASE, SUFFICIENT TO INCREASE THE TIMKEN LOAD-CARRYING CAPACITY OF THE MUD TO AT LEAST ABOUT 30 POUNDS, SAID MUD CONTAINING NO AMOUNT OF ALKALI METAL HYDROXIDE SUFFICIENT TO DESTROY THE ENHANCED LUBRICATING PROPERTIES OF THE MUD.
Claim 2
Dependent Claim
105 words
A DRILLING MUD OF ENHANCED LUBRICATING PROPERTIES COMPRISING AN OIL-IN-WATER EMULSION CONTAINING CLAY SOLIDS, AN OIL PHASE OF FROM 2 TO 40 PERCENT BY VOLUME OF SAID MUD, AND A WATER-INSOLUBLE, PREFERENTIALLY OIL-WETTABLE INORGANIC SULFIDE SELECTED FROM THE GROUP CONSISTING OF THE SULFIDES OF ARSENIC, ANTIMONY, BISMUTH, LEAD, ZINC, IRON, CADMIUM, COPPER, MOLYBDENUM AND MERCURY IN AN AMOUNT, FROM ABOUT 1.25 TO 20 PERCENT BY WEIGHT OF THE OIL PHASE, SUFFICIENT TO INCREASE THE TIMKEN LOAD-CARRYING CAPACITY OF THE MUD TO AT LEAST ABOUT 30 POUNDS, SAID MUD CONTAINING NO AMOUNT OF ALKALI METAL HYDROXIDE SUFFICIENT TO DESTROY THE ENHANCED LUBRICATING PROPERTIES OF THE MUD.
References Cited (Backward Citations)
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Cited
US2156803A
Cited
US2476845A
Cited
US2509588A
Cited
US2497398A
Cited
US2686156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |