Patent US3638726A successfully refreshed from Google Patents.
US3638726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well screens
Assignee: Individual
•
Filing: 1969-11-05
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Granted: 1972-02-01
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Expires: 1989-11-05
Abstract
Abstract The well screen has an outer tube and a telescoping inner tube. The tubes have identical horizontal series of slots therein. The outer tube is initially adjusted longitudinally with respect to the outer tube to gauge the slot openings through the communicating slots of the tubes. Solvent cement is used for securing the tubes in adjusted position.
Inventors
- 👤 David L Sibley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:07
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/086; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/16; E03B3/18; E03B3/20; E03B3/22; Y; Y02; Y02A; Y02A20/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A well screen comprising an outer tube, a telescoping inner tube, said tubes having identical horizontal series of slots therein formed such that the series of slots in said inner tube are capable of registering with the corresponding series of slots in the outer tube, the inner tube being adjusted longitudinally with respect to the outer tube to gauge the slot openings through the communicating slots of the tubes; and means for securing the tubes in adjusted position comprising solvent cement applied to the contacting faces of the said tubes prior to adjustment of the tubes, the cement when set closing all openings in the tubes except the gauged slots.
Claim 2
Dependent Claim
110 words
A well screen comprising an outer tube, a telescoping inner tube, said tubes having identical horizontal series of slots therein formed such that the series of slots in said inner tube are capable of registering with the corresponding series of slots in the outer tube, the inner tube being adjusted longitudinally with respect to the outer tube to gauge the slot openings through the communicating slots of the tubes; and means for securing the tubes in adjusted position comprising solvent cement applied to the contacting faces of the said tubes prior to adjustment of the tubes, the cement when set closing all openings in the tubes except the gauged slots.
Claim 3
Dependent Claim
50 words
In a well screen as set forth in claim 1, said tubes being of plastic material, and the series of slots being arranged in vertical rows substantially evenly spaced around the periphery of the tubes, with the rows in the inner tube disposed directly behind those of the outer tube.
Claim 4
Dependent Claim
38 words
In a well screen as set forth in claim 1, the gauged slots being defined by the spaces between the tops of the slots in the outer tube and the bottoms of the slots in the inner tube.
Claim 5
Dependent Claim
26 words
In a well screen as set forth in claim 3, said tops and bottoms of the slots forming offset lips preventing clogging of the gauGed slots.
References Cited (Backward Citations)
US419606A
Cited
US1500828A
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US1594788A
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US1861722A
Cited
US2681111A
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US2973814A
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US3502145A
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |