Patent US3637014A successfully refreshed from Google Patents.
US3637014A
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Secondary oil recovery process using time-dependent shear-thinning liquid
Assignee: Mobil Oil AS
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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 13:43
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
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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 |