US3269468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foaming agents for use in air drilling of wells
Assignee: ConocoPhillips Co
•
Filing: 1962-07-20
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Granted: 1966-08-30
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Achyut K Phansalkar
- 👤 Jack L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE METHOD OF REMOVING CUTTINGS AND FORMATION FLUIDS FROM THE BORE OF A WELL BEING DRILLED UTILIZING A GASEOUS CIRCULATION MEDIUM WHEREIN SAID FORMATION FLUIDS ARE UTILIZED TO FORM A FOAM WITHIN THE WELL BORE, WHICH FOAM IS SWEPT FROM THE WELL BORE WITH SAID GASEOUS CIRCULATING MEDIUM SO AS TO CARRY WITH IT SAID CUTTINGS, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID FLUIDS (A) A FOAMING AGENT HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
73 words
IN THE METHOD OF REMOVING CUTTINGS AND FORMATION FLUIDS FROM THE BORE OF A WELL BEING DRILLED UTILIZING A GASEOUS CIRCULATION MEDIUM WHEREIN SAID FORMATION FLUIDS ARE UTILIZED TO FORM A FOAM WITHIN THE WELL BORE, WHICH FOAM IS SWEPT FROM THE WELL BORE WITH SAID GASEOUS CIRCULATING MEDIUM SO AS TO CARRY WITH IT SAID CUTTINGS, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID FLUIDS (A) A FOAMING AGENT HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |