Patent US4034811A successfully refreshed from Google Patents.
US4034811A
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Method for sealing a permeable subterranean formation
Assignee: ConocoPhillips Co
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Filing: 1975-11-20
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Granted: 1977-07-12
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Expires: 1995-11-20
Abstract
Abstract A method for sealing a permeable subterranean formation, particularly adjacent to a wellbore, is disclosed. Briefly, the method comprises; A. adding a liquid polymerizable material (e.g. furfuryl alcohol) to the wellbore at the site adjacent to the permeable subterranean formation, B. adding an acidic catalyst to the wellbore at the site defined in (a), C. allowing polymerization to occur both in the wellbore and in the adjacent subterranean formation, and D. removing the polymerized material from the wellbore.
Inventors
- 👤 Derry D. Sparlin
- 👤 Robert E. Crumb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:46
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A method for sealing a permeable subterranean formation adjacent to a wellbore wherein the method comprises: a. adding furfuryl alcohol to the wellbore at a site adjacent to the permeable subterranean formation, b. adding an acidic catalyst, selected from the group consisting of hydrochloric acid, phosphoric acid, and hypophosphorous acid, to the furfuryl alcohol at the site referred to in step (a), c. allowing polymerization to occur both in the wellbore and in the adjacent subterranean formation, and d. removing the polymerized material from the wellbore.
Claim 2
Independent Claim
86 words
A method for sealing a permeable subterranean formation adjacent to a wellbore wherein the method comprises: a. adding furfuryl alcohol to the wellbore at a site adjacent to the permeable subterranean formation, b. adding an acidic catalyst, selected from the group consisting of hydrochloric acid, phosphoric acid, and hypophosphorous acid, to the furfuryl alcohol at the site referred to in step (a), c. allowing polymerization to occur both in the wellbore and in the adjacent subterranean formation, and d. removing the polymerized material from the wellbore.
Claim 3
Independent Claim
117 words
A method for sealing a permeable subterranean formation adjacent to a wellbore wherein the method comprises: a. adding sand to a slotted liner within a wellbore to the lower level of the area to be treated, b. adding gravel or similar material to the annulur space between the slotted liner and the underreamed wellbore, c. adding a liquid polymerizable material to the slotted liner at a site adjacent to the permeable subterranean formation, d. adding an acidic catalyst to the liquid polymerizable material at the site defined in step (c), allowing polymerization to occur both in the wellbore and in the adjacent subterranean formation, and f. removing the polymerized material and the sand from the slotted liner.
Claim 4
Independent Claim
117 words
A method for sealing a permeable subterranean formation adjacent to a wellbore wherein the method comprises: a. adding sand to a slotted liner within a wellbore to the lower level of the area to be treated, b. adding gravel or similar material to the annulur space between the slotted liner and the underreamed wellbore, c. adding a liquid polymerizable material to the slotted liner at a site adjacent to the permeable subterranean formation, d. adding an acidic catalyst to the liquid polymerizable material at the site defined in step (c), allowing polymerization to occur both in the wellbore and in the adjacent subterranean formation, and f. removing the polymerized material and the sand from the slotted liner.
Claim 5
Dependent Claim
13 words
The method of claim 2 wherein the liquid polymerizable material is furfuryl alcohol.
Claim 6
Dependent Claim
12 words
The method of claim 3 wherein the acidic catalyst is hydrochloric acid.
Claim 7
Dependent Claim
13 words
The method of claim 3 wherein the acidic catalyst is a phosphoric acid.
Claim 8
Dependent Claim
12 words
The method of claim 3 wherein the acidic catalyst is hypophosphorous acid.
References Cited (Backward Citations)
USRE23393E
Cited
US2236836A
Cited
US2321761A
Cited
US2796934A
Cited
US2827121A
Cited
US3199589A
Cited
US3199590A
Cited
US3437145A
Cited
US3548944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |