US3288230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing gas loss during gas drilling
Assignee: Dow Chemical Co
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Filing: 1964-03-24
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Granted: 1966-11-29
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Expires: 1984-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank H Braunlich
- 👤 Warren M Zingg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:15
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A PROCESS FOR DRILLING BOREHOLES INTO THE EARTH WHEREIN A GAS IS CIRCULATED WITHIN THE BOREHOLE, THE METHOD OF PREVENTING LOSS OF SAID GAS INTO A PERMEABLE EARTH FORMATION WHICH COMPRISES MIXING WITH SAID GAS AND CIRCULATING INTO SAID BOREHOLE A CHARGE OF A PULVERULENT SOLID FROM THE GROUP CONSISTING OF WATER SWELLABLE NATURAL GUMS, SYNTHETIC POLYMERS AND CLAYS AND THEREAFTER MIXING WITH SAID GAS AND CIRCULATING INTO SAID BOREHOLE A CHARGE OF AN AQUEOUS BASE MIST FROM THE GROUP CONSISTING OF WATER AND WATER SOLUTIONS OF SALTS.
Claim 2
Dependent Claim
89 words
IN A PROCESS FOR DRILLING BOREHOLES INTO THE EARTH WHEREIN A GAS IS CIRCULATED WITHIN THE BOREHOLE, THE METHOD OF PREVENTING LOSS OF SAID GAS INTO A PERMEABLE EARTH FORMATION WHICH COMPRISES MIXING WITH SAID GAS AND CIRCULATING INTO SAID BOREHOLE A CHARGE OF A PULVERULENT SOLID FROM THE GROUP CONSISTING OF WATER SWELLABLE NATURAL GUMS, SYNTHETIC POLYMERS AND CLAYS AND THEREAFTER MIXING WITH SAID GAS AND CIRCULATING INTO SAID BOREHOLE A CHARGE OF AN AQUEOUS BASE MIST FROM THE GROUP CONSISTING OF WATER AND WATER SOLUTIONS OF SALTS.
References Cited (Backward Citations)
US2818230A
Cited
US3111178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |