Patent US4096911A successfully refreshed from Google Patents.
US4096911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel base well screen
Assignee: Wheelabrator Clean Water Inc
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Filing: 1977-07-05
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Granted: 1978-06-27
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Expires: 1997-07-05
Abstract
Abstract Well screen having a base made of formed channels provides the strength of a pipe base screen but weighs less, costs less, and provides greater vertical flow area. The channels are perforated and are in continuous contact around the screen with the contiguous legs of adjacent channels being welded at their ends to each other and to the wrap wire. The screen is particularly useful in oil and gas wells where great torsional strength is needed.
Inventors
- 👤 Bruce R. Geske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:52
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/088; B; B01; B01D; B01D24/00; B01D24/02; B01D24/20; B01D24/24; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/44; B01D29/48
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A well screen comprising a hollow, multiple channel core portion and a formed wire enwrapment portion defining open slots for the passage of liquid or gas; said core portion comprising a continuous ring of longitudinal channel members, each of said channel members having a relatively wide web portion and relatively short leg portions extending radially outwardly from said web portion, said web portions being perforated and said leg portions being welded to said formed wire enwrapment at each juncture therewith.
Claim 2
Dependent Claim
80 words
A well screen comprising a hollow, multiple channel core portion and a formed wire enwrapment portion defining open slots for the passage of liquid or gas; said core portion comprising a continuous ring of longitudinal channel members, each of said channel members having a relatively wide web portion and relatively short leg portions extending radially outwardly from said web portion, said web portions being perforated and said leg portions being welded to said formed wire enwrapment at each juncture therewith.
Claim 3
Dependent Claim
33 words
A well screen in accordance with claim 1 wherein said web portions of said channel members have a cross-section taken in a plane normal to the axis of the screen which is cylindrical.
Claim 4
Dependent Claim
27 words
A well screen in accordance with claim 1 wherein said web portions of said channel members have transverse rib portions formed at spaced positions along their length.
Claim 5
Dependent Claim
28 words
A well screen in accordance with claim 1 wherein said leg portions have terminal edges which are formed at a non-perpendicular angle to the plane of the legs.
Claim 6
Dependent Claim
39 words
A well screen in accordance with claim 4 wherein said edges are formed such that the terminal edge of each of the contiguous legs of adjacent channel members forms an acute angle with the outer surface of the leg.
Claim 7
Dependent Claim
39 words
A well screen in accordance with claim 4 wherein said edges are formed such that the terminal edge of each of the contiguous legs of adjacent channel members forms an obtuse angle with the outer surface of the leg.
Claim 8
Dependent Claim
14 words
A well screen in accordance with claim 1 wherein said well screen is metal.
Claim 9
Dependent Claim
14 words
A well screen in accordance with claim 1 wherein said well screen is plastic.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |