US3087545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heating and producing oil wells
Assignee: Pure Oil Co
•
Filing: 1961-08-09
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Granted: 1963-04-30
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Leo J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:05
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN THE RECOVERY OF PETROLEUM THROUGH A WELL-BORE PENETRATING A SUBTERRANEAN RESERVOIR INCLUDING AN OILPRODUCING STRATUM, A COMBUSTIBLE GAS-PRODUCING STRATUM VERTICALLY SPACED THEREFROM, AND A SUBSTANTIALLY IMPERMEABLE LAYER LYING BETWEEN SAID STRATA, WHEREIN VISCOUS DEPOSITS OF PETROLIFEROUS MATERIAL FORM IN AND PLUG A PETROLEUM TUBING-STRING IN SAID WELL-BORE, THE IMPROVEMENT COMPRISING ISOLATING ZONES OF SAID WELL-BORE ADJACENT TO SAID OIL-PRODUCING STRATUM AND SAID GAS-PRODUCING STRATUM FROM EACH OTHER, COLLECTING GAS PRODUCED FROM SAID GASPRODUCING STRATUM IN SAID WELL-BORE, PUMPING AIR DOWN SAID WELL-BORE AT A PRESSURE APPROXIMATING THAT OF SAID GAS TO AT LEAST THE DEPTH AT WHICH SAID PETROLIFEROUS DEPOSITS
Claim 2
Dependent Claim
101 words
IN THE RECOVERY OF PETROLEUM THROUGH A WELL-BORE PENETRATING A SUBTERRANEAN RESERVOIR INCLUDING AN OILPRODUCING STRATUM, A COMBUSTIBLE GAS-PRODUCING STRATUM VERTICALLY SPACED THEREFROM, AND A SUBSTANTIALLY IMPERMEABLE LAYER LYING BETWEEN SAID STRATA, WHEREIN VISCOUS DEPOSITS OF PETROLIFEROUS MATERIAL FORM IN AND PLUG A PETROLEUM TUBING-STRING IN SAID WELL-BORE, THE IMPROVEMENT COMPRISING ISOLATING ZONES OF SAID WELL-BORE ADJACENT TO SAID OIL-PRODUCING STRATUM AND SAID GAS-PRODUCING STRATUM FROM EACH OTHER, COLLECTING GAS PRODUCED FROM SAID GASPRODUCING STRATUM IN SAID WELL-BORE, PUMPING AIR DOWN SAID WELL-BORE AT A PRESSURE APPROXIMATING THAT OF SAID GAS TO AT LEAST THE DEPTH AT WHICH SAID PETROLIFEROUS DEPOSITS
References Cited (Backward Citations)
US2707029A
Cited
US2675081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |