US3743020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Consolidating perforation channel walls
Assignee: Shell USA Inc
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Filing: 1971-04-20
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Granted: 1973-07-03
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Expires: 1991-04-20
Abstract
Abstract In a well that opens into an unconsolidated reservoir formation through a perforated portion of grouted casing, the effective permeability is increased by flowing acid through the perforation tunnels to form channels between the grouting material and the reservoir formation and, while maintaining a fluid flow rate that keeps the channels free of solid particles inflowing a sand consolidating fluid that converts the walls of the channels to structures that are integral and permeable.
Inventors
- 👤 G Suman
- 👤 C Murphey
- 👤 E Richardson
- 👤 R Torrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:06
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/56; E; E21; E21B; E21B43/00; E21B43/02; E21B43/025; E21B43/25
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
The process of claim 1 in which: said acidizing fluid has a viscosity of less than about two centipoises; and said acidizing fluid is displaced into the earth formation in response to a pressure sufficient to cause a significant increase in flow rate in response to an increase in the permeability of the opening into the earth formation.
Claim 2
Dependent Claim
54 words
The process of claim 1 in which the rate at which said sand consolidating fluid is flowed through said channels is adjusted relative to the viscOsity of that fluid to enhance the entrainment and displacement of grains having a size and density at least equivalent to those of median-sized grains of the earth formation.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which said acidizing fluid comprises a mud acid formulation.
Claim 4
Dependent Claim
11 words
The process of claim 1 which comprises a hydrochloric acid formulation.
Claim 5
Dependent Claim
17 words
The process of claim 1 in which said sand consolidating fluid comprises an electroless metal plating formulation.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |