US2909224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing viscous crudes from underground formations
Assignee: Texaco Inc
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Filing: 1956-03-22
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Granted: 1959-10-20
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Expires: 1976-03-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/166; E21B43/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD OF TREATING AN UNDERGROUND FORMATION CONTAINING A VISCOUS HEAVY CRUDE SO AS TO INCREASE THE PRODUCTIVITY OF SAID CRUDE FROM SAID FORMATION VIA A WELL BORE PENETRATING SAID FORMATION WHICH COMPRISES INTRODUCING INTO SAID FORMATION VIA SAID WELL BORE A GAS EOUS STREAM CONSISTING ESSENTIALLY OF SUBSTANTIALLY PURE ETHANE, THAT PORTION OF SAID FORMATION SURROUNDING SAID WELL BORE AND INTO WHICH SAID GASEOUS STREAM IS INTRODUCED BEING AT A TEMPERATURE SUBSTANTIALLY GREATER THAN 90*F, THE CRITICAL TEMPERATURE OF ETHANE, MAINTAINING SAID GASEOUS STREAM INTRODUCED INTO SAID PORTION OF SAID FORMATION AT A TEMPERATURE SUBSTANTIALLY GREATER THAN 90* F, AND IN THE GASEOUS STATE WITHOUT LIQUEFACTION AND IN CONTACT WITH THE VISCOUS CRUDE IN THAT PORTION OF SAID
Claim 2
Independent Claim
119 words
A METHOD OF TREATING AN UNDERGROUND FORMATION CONTAINING A VISCOUS HEAVY CRUDE SO AS TO INCREASE THE PRODUCTIVITY OF SAID CRUDE FROM SAID FORMATION VIA A WELL BORE PENETRATING SAID FORMATION WHICH COMPRISES INTRODUCING INTO SAID FORMATION VIA SAID WELL BORE A GAS EOUS STREAM CONSISTING ESSENTIALLY OF SUBSTANTIALLY PURE ETHANE, THAT PORTION OF SAID FORMATION SURROUNDING SAID WELL BORE AND INTO WHICH SAID GASEOUS STREAM IS INTRODUCED BEING AT A TEMPERATURE SUBSTANTIALLY GREATER THAN 90*F, THE CRITICAL TEMPERATURE OF ETHANE, MAINTAINING SAID GASEOUS STREAM INTRODUCED INTO SAID PORTION OF SAID FORMATION AT A TEMPERATURE SUBSTANTIALLY GREATER THAN 90* F, AND IN THE GASEOUS STATE WITHOUT LIQUEFACTION AND IN CONTACT WITH THE VISCOUS CRUDE IN THAT PORTION OF SAID
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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |