US3695355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravel pack method
Assignee: ExxonMobil Upstream Research Co
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Filing: 1970-01-16
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Granted: 1972-10-03
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Expires: 1990-01-16
Abstract
Abstract A gravel packing method wherein a viscous fluid is injected into an unconsolidated formation at such a rate and pressure to form a cavity therein and a specially graded aggregate is pressure packed in the cavity to form an outer sand exclusion zone and an inner high permeability zone. The high permeability of the inner zone permits the passage of for-mation fines which escape the sand exclusion zone.
Inventors
- 👤 Donald B Wood
- 👤 Othar M Kiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/025; E21B43/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A method for gravel packing a well having a casing penetrating a poorly consolidated formation which comprises: injecting a fluid into said formation at a pressure sufficient to form a cavity around said casing, said cavity extending radially outwardly from said casing; packing said cavity with a fine aggregate material to form a first filter bed surrounding said casing, said fine aggregate material being sized to control the migration of formation particles; and thereafter, packing said cavity with a coarse aggregate material is form a second filter bed surrounding said casing and separating said first filter bed and said casing, said coarse aggregate material being coarser than said fine aggregate material and being sized to control the migration of said fine aggregate material in said first filter bed.
Claim 2
Independent Claim
128 words
A method for gravel packing a well having a casing penetrating a poorly consolidated formation which comprises: injecting a fluid into said formation at a pressure sufficient to form a cavity around said casing, said cavity extending radially outwardly from said casing; packing said cavity with a fine aggregate material to form a first filter bed surrounding said casing, said fine aggregate material being sized to control the migration of formation particles; and thereafter, packing said cavity with a coarse aggregate material is form a second filter bed surrounding said casing and separating said first filter bed and said casing, said coarse aggregate material being coarser than said fine aggregate material and being sized to control the migration of said fine aggregate material in said first filter bed.
Claim 3
Dependent Claim
41 words
The method as defined in claim 1 wherein said coarse aggregate material provides a permeability in said second filter bed which is at least five times greater than the permeability provided by the fine aggregate material in said first filter bed.
Claim 4
Dependent Claim
29 words
The method as defined in claim 1 wherein said fine aggregate material has a particle size between about 20 and 60 mesh on the U. S. Standard Sieve Series.
Claim 5
Dependent Claim
29 words
The method as defined in claim 1 wherein said coarse aggregate material has a particle size between about 8 and 20 mesh on the U. S. Standard Sieve Series.
Claim 6
Dependent Claim
34 words
The method as defined in claim 1 and further comprising the step of injecting a liquid resin into the second filter bed for consolidating a portion of the coarse aggregate material surrounding said casing.
References Cited (Backward Citations)
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US2952318A
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US3393736A
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US3362475A
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US3548942A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |