US3240700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drilling a well
Assignee: Phillips Petroleum Co
•
Filing: 1962-04-25
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Granted: 1966-03-15
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Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 Dixon W Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:04
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035; Y; Y10; Y10S; Y10S507/00; Y10S507/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
IN A PROCESS DRILLING A WELL WITH WELL DRILLING TOOLS, THE STEP OF CIRCULATING IN SAID WELL A DRILLING FLUID CONSISTING ESSENTIALLY OF A LIQUID MEDIUM, SAID LIQUID MEDIUM BEING ONE SELECTED FROM A GROUP CONSISTING OF OIL, WATER, AND EMULSIONS OF WATER AND OIL AND HAVING DISPERSED THEREIN AN ESTER OF PETROLEUM SULFONIC ACID AND AN ALKYL ARYL POLYETHER ALCOHOL HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
65 words
IN A PROCESS DRILLING A WELL WITH WELL DRILLING TOOLS, THE STEP OF CIRCULATING IN SAID WELL A DRILLING FLUID CONSISTING ESSENTIALLY OF A LIQUID MEDIUM, SAID LIQUID MEDIUM BEING ONE SELECTED FROM A GROUP CONSISTING OF OIL, WATER, AND EMULSIONS OF WATER AND OIL AND HAVING DISPERSED THEREIN AN ESTER OF PETROLEUM SULFONIC ACID AND AN ALKYL ARYL POLYETHER ALCOHOL HAVING THE GENERAL FORMULA:
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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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |