US4553595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a gravel packed horizontal well
Assignee: Texaco Inc
•
Filing: 1984-06-01
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Granted: 1985-11-19
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Expires: 2004-06-01
Abstract
Abstract Method for forming a gravel pack in-situ about a horizontal well in a sandy formation. The gravel pack is formed in two separate steps so that part of the pack will function as a foundation for slidably inserting and supporting the well liner. Thereafter, the remainder of the pack is completed about the liner by introducing a gravel slurry that accumulates on the foundation and about the liner.
Inventors
- 👤 Wann-Sheng Huang
- 👤 Alfred Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:53
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/30; E21B43/305; E21B43/02; E21B43/04; E21B7/00; E21B7/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
Method for forming a gravel packed, horizontal well completion in a hydrocarbon productive subterranean formation comprised of unconsolidated sand particles which hold a viscous hydrocarbon, whereby to minimize the amount of said sand particles carried from the formation when the hydrocarbon is thermally stimulated and produced, which method includes the steps of; forming a wellbore into the formation substrate and deviating said wellbore to form a substantially horizontal segment when the bore lies within the productive formation, depositing a gravel foundation in the horizontal segment of said wellbore to occupy only the lower portion thereof, while leaving the upper portion unoccupied, longitudinally inserting an elongated well liner along said gravel foundation to be supported by the latter in the unoccupied upper portion of the wellbore, and depositing a second flow of gravel slurry into the unoccupied upper portion of said wellbore horizontal segment, whereby gravel from the said slurry will fill the wellbore upper portion above said gravel foundation and enclose the liner within a gravel pack.
Claim 2
Dependent Claim
167 words
Method for forming a gravel packed, horizontal well completion in a hydrocarbon productive subterranean formation comprised of unconsolidated sand particles which hold a viscous hydrocarbon, whereby to minimize the amount of said sand particles carried from the formation when the hydrocarbon is thermally stimulated and produced, which method includes the steps of; forming a wellbore into the formation substrate and deviating said wellbore to form a substantially horizontal segment when the bore lies within the productive formation, depositing a gravel foundation in the horizontal segment of said wellbore to occupy only the lower portion thereof, while leaving the upper portion unoccupied, longitudinally inserting an elongated well liner along said gravel foundation to be supported by the latter in the unoccupied upper portion of the wellbore, and depositing a second flow of gravel slurry into the unoccupied upper portion of said wellbore horizontal segment, whereby gravel from the said slurry will fill the wellbore upper portion above said gravel foundation and enclose the liner within a gravel pack.
Claim 3
Dependent Claim
28 words
In the method as defined in claim 1, wherein said gravel foundation occupies a volume within the wellbore between about one-quarter and three-quarters of the wellbore cross-sectional area.
Claim 4
Dependent Claim
26 words
In the method as defined in claim 1, wherein said gravel foundation occupies by volume about one-half of the cross-sectional area of said wellbore horizontal segment.
Claim 5
Dependent Claim
58 words
In the method as defined in claim 1, wherein said gravel foundation is formed by inserting a gravel slurry conduit into the wellbore for the entire length of the latter, and directing a flow of gravel slurry through said conduit for deposition thereof in to the wellbore upper portion, as the conduit is progressively withdrawn from the wellbore.
Claim 6
Dependent Claim
38 words
In the method as defined in claim 4, including the step of; regulating the volume of said gravel slurry which enters the wellbore upper portion, in accordance with the rate at which the slurry conduit is withdrawn therefrom.
Claim 7
Dependent Claim
38 words
In the method as defined in claim 1, including the step of; introducing a second gravel slurry conduit into said wellbore concurrently with the insertion of said elongated well liner along said gravel foundation and into the wellbore.
Claim 8
Dependent Claim
31 words
In the method as defined in claim 6, wherein said second gravel slurry conduit is releasably attached to the elongated well liner as the latter is slidably inserted into the wellbore.
Claim 9
Dependent Claim
24 words
In the method as defined in claim 1, wherein said second flow of gravel slurry is concurrently introduced along opposed sides of the liner.
References Cited (Backward Citations)
DE190870C
Cited
US30019A
Cited
DE870527C
Cited
US2778603A
Cited
US2928468A
Cited
US3261401A
Cited
USRE30019E
Cited
US4296969A
Cited
US4442901A
Cited
US4442896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |