US2944019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling mud and the method of making the same
Assignee: ALFRED G HOYL
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Filing: 1956-11-13
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Granted: 1960-07-05
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Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 James V Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:29
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A COMPOSITION FOR USE AS A WEIGHTING AGENT IN A DRILLING FLUID FOR OIL AND GAS WELLS, COMPRISING A NON-SEPARATING HOMOGENEOUS MIXTURE OF FINE PARTICLES OF VERMICULITE IMPREGNATED WITH FINE PARTICLES OF MAGNETITE, THE PROPORTION OF VERMICULITE OF MAGNETITE BY WEIGHT BEING BETWEEN 5 AND 50 PERCENT.
Claim 2
Dependent Claim
47 words
A COMPOSITION FOR USE AS A WEIGHTING AGENT IN A DRILLING FLUID FOR OIL AND GAS WELLS, COMPRISING A NON-SEPARATING HOMOGENEOUS MIXTURE OF FINE PARTICLES OF VERMICULITE IMPREGNATED WITH FINE PARTICLES OF MAGNETITE, THE PROPORTION OF VERMICULITE OF MAGNETITE BY WEIGHT BEING BETWEEN 5 AND 50 PERCENT.
Claim 3
Independent Claim
79 words
A METHOD OF CONTROLLING THE VISCOSITY OF A MUDLADEN FLUID FOR USE IN DRILLING OIL AND GAS WELLS CONTAINING FINELY GROUND PARTICLES OF VERMICULITE IMPREGNATED WITH MAGNETITE, SAID VERMICULITE BEING IN PROPORTION TO THE MAGNETITE IN THE ORDER OF FROM 5 TO 50 PERCENT BY WEIGHT INCLUDING THE STEPS OF SUBJECTNG THE FLUID TO A DIRECT CURRENT MAGNETIC FIELD TO PRODUCE FLOCCULATION OF THE FLUID, AND SUBJECT THE FLUID TO AN ALTERNATING CURRENT MAGNETIC FIELD TO DEFLOCCULATE THE FLUID.
Claim 4
Independent Claim
79 words
A METHOD OF CONTROLLING THE VISCOSITY OF A MUDLADEN FLUID FOR USE IN DRILLING OIL AND GAS WELLS CONTAINING FINELY GROUND PARTICLES OF VERMICULITE IMPREGNATED WITH MAGNETITE, SAID VERMICULITE BEING IN PROPORTION TO THE MAGNETITE IN THE ORDER OF FROM 5 TO 50 PERCENT BY WEIGHT INCLUDING THE STEPS OF SUBJECTNG THE FLUID TO A DIRECT CURRENT MAGNETIC FIELD TO PRODUCE FLOCCULATION OF THE FLUID, AND SUBJECT THE FLUID TO AN ALTERNATING CURRENT MAGNETIC FIELD TO DEFLOCCULATE THE FLUID.
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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |