Patent US3196946A successfully refreshed from Google Patents.
US3196946A
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Air method of cementing wells
Assignee: UNITED FUEL GAS CO
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Filing: 1962-11-05
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Granted: 1965-07-27
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 James B Lauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:58
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A GAS METHOD OF CEMENTING WELLS OF THE TYPE WHEREIN A PRODUCTION CASING IS SUSPENDED WITHIN A GAS PRODUCING FORMATION SO AS TO DEFINE AN ANNULUS BETWEEN SAID FORMATION AND THE CASING COMPRISING: (A) PRESSURIZING SAID CASING AND SAID ANNULUS EXCLUSIVELY WITH A GAS IN A PRESSURE RANGE GREATE THAN THE PRESSURE OF THE GAS PRODUCING FORMATION AND LESS THAN THE FORMATION BREAKDOWN PRESSURE; (B) CHARGING CEMENT DOWN THROUGH AND INTO THE BOTTOM OF SAID CASING AND UP SAID ANNULUS, WHILE; (C) MAINTAINING A CONSTANT PRESURE WITHIN SAID PRESSURE RANGE IN SAID ANNULUS DURING SAID CHARGING AND UNTIL SAID CEMENT HAS SET.
Claim 2
Dependent Claim
102 words
A GAS METHOD OF CEMENTING WELLS OF THE TYPE WHEREIN A PRODUCTION CASING IS SUSPENDED WITHIN A GAS PRODUCING FORMATION SO AS TO DEFINE AN ANNULUS BETWEEN SAID FORMATION AND THE CASING COMPRISING: (A) PRESSURIZING SAID CASING AND SAID ANNULUS EXCLUSIVELY WITH A GAS IN A PRESSURE RANGE GREATE THAN THE PRESSURE OF THE GAS PRODUCING FORMATION AND LESS THAN THE FORMATION BREAKDOWN PRESSURE; (B) CHARGING CEMENT DOWN THROUGH AND INTO THE BOTTOM OF SAID CASING AND UP SAID ANNULUS, WHILE; (C) MAINTAINING A CONSTANT PRESURE WITHIN SAID PRESSURE RANGE IN SAID ANNULUS DURING SAID CHARGING AND UNTIL SAID CEMENT HAS SET.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |