US2729426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling
Assignee: HOUGH SOILS ENGINEERING LAB
•
Filing: 1954-10-18
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Granted: 1956-01-03
•
Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Julian C Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:00
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/38; Y; Y10; Y10S; Y10S507/00; Y10S507/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A PROCESS OF PNEUMATIC DRILLING OF WELLS IN WHICH A DRILLING FLUID IS CIRCULATED DOWNWARDLY TO THE BIT OF THE DRILL IN ONE PASSAGEWAY AND UPWARDLY FROM THE BIT TO SURFACE DISCHARGE THROUGH ANOTHER PASSAGEWAY, THE STEPS WHICH COMPRISE PRODUCING A DRILLING FLUID OF COMPRESSED GASEOUS MEDIA HAVING A HYDROPHOBED SURFACED FINELY DIVIDED POWDER DISSEMINATED THERETHROUGH, CONDUCTING THE SAID DRILLING FLUID UNDER PRESSURE DOWN ONE PASSAGEWAY TO THE BIT, PASSING THE DRILLING FLUID THROUGH AND AROUND THE BIT IN A MANNER TO CAUSE THE SAID GASEOUS MEDIA TO EXPAND SO AS TO COOL THE BIT AND THE SAID HYDROPHOBED SURFACED POWDER TO COAT THE SURFACES OF THE CUTTINGS AS THEY ARE MADE TO RENDER THE CUTTINGS WATER REPELLENT, AND THEN CONDUCTING THE SAID DRILLING FLUID WITH THE ENTRAINED POWDER-COATED CUTTINGS TO THE SURFACE FOR DISCHARGE.
Claim 2
Dependent Claim
136 words
IN A PROCESS OF PNEUMATIC DRILLING OF WELLS IN WHICH A DRILLING FLUID IS CIRCULATED DOWNWARDLY TO THE BIT OF THE DRILL IN ONE PASSAGEWAY AND UPWARDLY FROM THE BIT TO SURFACE DISCHARGE THROUGH ANOTHER PASSAGEWAY, THE STEPS WHICH COMPRISE PRODUCING A DRILLING FLUID OF COMPRESSED GASEOUS MEDIA HAVING A HYDROPHOBED SURFACED FINELY DIVIDED POWDER DISSEMINATED THERETHROUGH, CONDUCTING THE SAID DRILLING FLUID UNDER PRESSURE DOWN ONE PASSAGEWAY TO THE BIT, PASSING THE DRILLING FLUID THROUGH AND AROUND THE BIT IN A MANNER TO CAUSE THE SAID GASEOUS MEDIA TO EXPAND SO AS TO COOL THE BIT AND THE SAID HYDROPHOBED SURFACED POWDER TO COAT THE SURFACES OF THE CUTTINGS AS THEY ARE MADE TO RENDER THE CUTTINGS WATER REPELLENT, AND THEN CONDUCTING THE SAID DRILLING FLUID WITH THE ENTRAINED POWDER-COATED CUTTINGS TO THE SURFACE FOR DISCHARGE.
References Cited (Backward Citations)
US2469354A
Cited
US2581943A
Cited
US2676148A
Cited
US2701122A
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US2692863A
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US2705700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |