US3637014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary oil recovery process using time-dependent shear-thinning liquid
Assignee: Mobil Oil AS
•
Filing: 1970-03-02
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Granted: 1972-01-25
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Expires: 1990-03-02
Abstract
Abstract Secondary oil recovery process in which at least a portion of the driving fluid injected into the oil reservoir is a timedependent shear-thinning liquid. The time-dependent liquid retains a relatively low viscosity induced by the shear rates encountered during injection and thereafter undergoes an increase in viscosity with time. As the viscosity of the time-dependent liquid increases, it functions to increase the sweep efficiency of the secondary recovery process.
Inventors
- 👤 Lloyd G Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:52
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
The method of claim 1 wherein fluid injection is suspended in order to allow viscosity recovery of said viscosity time-dependent liquid and thereafter resuming fluid injection.
Claim 2
Dependent Claim
17 words
The method of claim 2 wherein fluid injection is suspended subsequent to breakthrough at said production system.
Claim 3
Dependent Claim
20 words
The method of claim 2 wherein additional viscosity time-dependent shear-thinning liquid is injected subsequent to said suspension of fluid injection.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein a plurality of slugs of viscosity time-dependent shear-thinning liquid are injected separated by a time-independent liquid.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein said viscosity time-dependent shear-thinning liquid is injected in an amount within the range of 0.5 to 25 percent of the pore volume of said recovery zone.
References Cited (Backward Citations)
US3292696A
Cited
US3279537A
Cited
US3391736A
Cited
US3502146A
Cited
US3519077A
Cited
US3523581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |