US2697071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil base drilling fluid containing latex
Assignee: Gulf Research and Development Co
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Filing: 1951-05-28
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Granted: 1954-12-14
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Expires: 1971-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harvey T Kennedy
- 👤 Abraham J Teplitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:23
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/32; C09K8/36; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A PROCESS FOR DRILLING A WELL WITH WELL DRILLING TOOLS WHEREIN THERE IS CIRCULATED IN THE WELL AN OIL BASE DRILLING FLUID CONTAINING MINERAL OIL IN MIXTURE WITH SUFFICIENT RUBBER LATEX TO REGULATE THE VISCOSITY AND FLUID LOSS PROPERTIES OF THE FLUID, THE METHOD OF FORMING A PROTECTIVE COATING ON THE WALL OF SAID WELL TO DECREASE THE LOSS OF FLUID INTO SURROUNDING PERMEABLE FORMATIONS UNDER THE ACTION OF DIFFERENTIAL PRESSURES ENCOUNTERED IN DRILLING, WHICH COMPRISES ADMIXING WITH HEATED MINERAL OIL AN AMOUNT OF RUBBER LATEX SUFFICIENT UPON CONSEQUENT SWELLING OF THE RUBBER PARTICLES TO LOWER THE FLUID LOSS THROUGH THE PROTECTIVE COATING FORMED BY CIRCULATION OF SAID FLUID IN THE WELL BUT INSUFFICIENT TO INCREASE THE VISCOSITY OF SAID FLUID TO SUCH AN EXTENT AS TO RENDER SAID FLUID UNCIRCULATABLE, AND CONTACTING SAID WALL OF THE WELL WITH THE RESULTING OIL-LATEX FLUID.
Claim 2
Dependent Claim
144 words
IN A PROCESS FOR DRILLING A WELL WITH WELL DRILLING TOOLS WHEREIN THERE IS CIRCULATED IN THE WELL AN OIL BASE DRILLING FLUID CONTAINING MINERAL OIL IN MIXTURE WITH SUFFICIENT RUBBER LATEX TO REGULATE THE VISCOSITY AND FLUID LOSS PROPERTIES OF THE FLUID, THE METHOD OF FORMING A PROTECTIVE COATING ON THE WALL OF SAID WELL TO DECREASE THE LOSS OF FLUID INTO SURROUNDING PERMEABLE FORMATIONS UNDER THE ACTION OF DIFFERENTIAL PRESSURES ENCOUNTERED IN DRILLING, WHICH COMPRISES ADMIXING WITH HEATED MINERAL OIL AN AMOUNT OF RUBBER LATEX SUFFICIENT UPON CONSEQUENT SWELLING OF THE RUBBER PARTICLES TO LOWER THE FLUID LOSS THROUGH THE PROTECTIVE COATING FORMED BY CIRCULATION OF SAID FLUID IN THE WELL BUT INSUFFICIENT TO INCREASE THE VISCOSITY OF SAID FLUID TO SUCH AN EXTENT AS TO RENDER SAID FLUID UNCIRCULATABLE, AND CONTACTING SAID WALL OF THE WELL WITH THE RESULTING OIL-LATEX 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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |