US2818231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drilling with air
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-03-09
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Granted: 1957-12-31
•
Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Freeman
- 👤 Victor G Meadors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:59
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF OVERCOMING COAGULATION OF DRILL CUTTING IN DRILLING A BORE HOLE BY GAS CIRCULATION IN WHICH ABOUT 0.01 TO 0.10 LB. OF A VAPORIZED ORGANOSILANE COMPOUND PER THOUSAND CUBIC FEET OF GAS IS MIXED WITH THE DRILLING GAS DURING CIRCULATION OF THE GASEOUS DRILLING FLUID, SAID ORGANOSILANE COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF ORGANOHALOSILANES AND ORGANOAMINOSILANES HAVING BOILING POINTS OF LESS THAN 100* C. AT ATMOSPHERIC PRESSURE.
Claim 2
Independent Claim
71 words
THE METHOD OF OVERCOMING COAGULATION OF DRILL CUTTING IN DRILLING A BORE HOLE BY GAS CIRCULATION IN WHICH ABOUT 0.01 TO 0.10 LB. OF A VAPORIZED ORGANOSILANE COMPOUND PER THOUSAND CUBIC FEET OF GAS IS MIXED WITH THE DRILLING GAS DURING CIRCULATION OF THE GASEOUS DRILLING FLUID, SAID ORGANOSILANE COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF ORGANOHALOSILANES AND ORGANOAMINOSILANES HAVING BOILING POINTS OF LESS THAN 100* C. AT ATMOSPHERIC PRESSURE.
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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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |