US3223622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling mud system
Assignee: Pan American Petroleum Corp
•
Filing: 1962-06-25
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Granted: 1965-12-14
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 James L Lummus
- 👤 Jr Platho P Scott
- 👤 Park Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/035; C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN A METHOD FOR PREVENTING TEH OCCURRENCE OF DIFFERENTIALLY STUCK DRILL PIPE WHEREIN A WELL IS BEING DRILLED INTO A FORMATION USING A WATER BASE LIQUID DRILLING FLUID AND WHEREIN THERE IS A PRONOUNCED TENDENCY FOR SAID PIPE TO BECOME STUCK TO THE WALL OF SAID WELL, THE IMPROVENMENT WHICH COMPRISES INCORPORATING INTO SAID FLUID FROM ABOUT 0.2 TO ABOUT 25 POUNDS PER BARREL OF SAID FLUID FROM ABOUT SURFACE-ACTIVE AGENT PREPARED FROM ABOUT FOUR PARTS OF A HALF AMMONIUM HALF IOSPROPYLAMINE SALT OF THE SULFOSUCCINIC ACID ESTER OF THE OLEIC ACID AMIDE OF ISOPROPANOL AMINE AND ABOUT ONE PART OF THE ISOPROPYLAMINE SALT OF DODECYL BENZENE SULFONIC ACID.
Claim 2
Dependent Claim
109 words
IN A METHOD FOR PREVENTING TEH OCCURRENCE OF DIFFERENTIALLY STUCK DRILL PIPE WHEREIN A WELL IS BEING DRILLED INTO A FORMATION USING A WATER BASE LIQUID DRILLING FLUID AND WHEREIN THERE IS A PRONOUNCED TENDENCY FOR SAID PIPE TO BECOME STUCK TO THE WALL OF SAID WELL, THE IMPROVENMENT WHICH COMPRISES INCORPORATING INTO SAID FLUID FROM ABOUT 0.2 TO ABOUT 25 POUNDS PER BARREL OF SAID FLUID FROM ABOUT SURFACE-ACTIVE AGENT PREPARED FROM ABOUT FOUR PARTS OF A HALF AMMONIUM HALF IOSPROPYLAMINE SALT OF THE SULFOSUCCINIC ACID ESTER OF THE OLEIC ACID AMIDE OF ISOPROPANOL AMINE AND ABOUT ONE PART OF THE ISOPROPYLAMINE SALT OF DODECYL BENZENE SULFONIC ACID.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |