Patent US2801967A successfully refreshed from Google Patents.
US2801967A
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Drilling fluid and method
Assignee: Oil Base Inc
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Filing: 1955-09-12
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Granted: 1957-08-06
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Doyne L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:43
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN OILBASE WELL-UDRILLING FLUID COMPRISING AN ASPHALTCONTAINING PETROLEUM OIL, AND AT LEAST ABOUT 0.1% BY VOLUME, BASED ON THE TOTAL VOLUME FO THE DRILLING VOLUME OF RUBBER LATEX, SAID FLUID BEING SUBSTANTIALLY FREE FROM A COAGULANT FOR SAID RUBBER LATEX AND THE ASPALT BEING PRESENT IN THE PETROLEUM OIL IN AN AMOUNT SUFFICIENT WITH SAID RUBBER LATEX TO SUBSTANTIALY INCREASE THE FLUID VISCOSITY AND GEL STRENGTH OF SAID DRILLING FLUID AND TO SUBSTANTIALLY REDUCE FLUID LOSS, THE AMOUNT OF RUBBER LATEX BEING INSUFFICIENT TO INCREASE THE VISCOSITY OF SAID DRILLING FLUID IN SUCH AN EXTENT AS TO RENDER SAID DRILLING FLUID UNCIRCULATABLE.
Claim 2
Dependent Claim
102 words
AN OILBASE WELL-UDRILLING FLUID COMPRISING AN ASPHALTCONTAINING PETROLEUM OIL, AND AT LEAST ABOUT 0.1% BY VOLUME, BASED ON THE TOTAL VOLUME FO THE DRILLING VOLUME OF RUBBER LATEX, SAID FLUID BEING SUBSTANTIALLY FREE FROM A COAGULANT FOR SAID RUBBER LATEX AND THE ASPALT BEING PRESENT IN THE PETROLEUM OIL IN AN AMOUNT SUFFICIENT WITH SAID RUBBER LATEX TO SUBSTANTIALY INCREASE THE FLUID VISCOSITY AND GEL STRENGTH OF SAID DRILLING FLUID AND TO SUBSTANTIALLY REDUCE FLUID LOSS, THE AMOUNT OF RUBBER LATEX BEING INSUFFICIENT TO INCREASE THE VISCOSITY OF SAID DRILLING FLUID IN SUCH AN EXTENT AS TO RENDER SAID DRILLING FLUID UNCIRCULATABLE.
References Cited (Backward Citations)
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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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |