US3709293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire wrapped well screen
Assignee: Layne and Bowler Co
•
Filing: 1971-02-22
•
Granted: 1973-01-09
•
Expires: 1991-02-22
Abstract
Abstract A well screen in which wire having accurately formed spacing lugs therein is helically wrapped around a tubular pipe having concave arcuate grooves longitudinally formed in the outer surface thereof and either through slots or perforations intersecting the grooves at the point of deepest penetration thereof to produce a funnel effect. In addition to the more conventional keystone wire, there is further disclosed two subspecies of wire having a cross-section including a concave arcuate, preferably semicircular, segment to increase the transverse flow area between windings and enhance the circumferential flow.
Inventors
- 👤 L Layne
- 👤 F Gerwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:56
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A well screen comprising: a tubular pipe having a plurality of elongate longitudinal grooves formed therein at the outer surface thereof and a plurality of apertures extending radially through said pipe and intersecting the grooves; a wire helically disposed around the outside of said pipe, said wire having a general cross-sectional shape comprising a first substantially linear segment, a second substantially linear segment longer than and disposed parallel to said first segment, a third substantially linear segment having one end disposed proximate one end of said first segment and the other end disposed proximate one end of said second segment, said third segment being disposed obtusely relative to said first segment and acutely relative to said second segment, and a fourth concavely disposed curved segment having one end disposed proximate the other end of said first segment and the other end disposed proximate the other end of said second segment; and means to space adjacent windings of said wire from one another.
Claim 2
Dependent Claim
162 words
A well screen comprising: a tubular pipe having a plurality of elongate longitudinal grooves formed therein at the outer surface thereof and a plurality of apertures extending radially through said pipe and intersecting the grooves; a wire helically disposed around the outside of said pipe, said wire having a general cross-sectional shape comprising a first substantially linear segment, a second substantially linear segment longer than and disposed parallel to said first segment, a third substantially linear segment having one end disposed proximate one end of said first segment and the other end disposed proximate one end of said second segment, said third segment being disposed obtusely relative to said first segment and acutely relative to said second segment, and a fourth concavely disposed curved segment having one end disposed proximate the other end of said first segment and the other end disposed proximate the other end of said second segment; and means to space adjacent windings of said wire from one another.
Claim 3
Dependent Claim
27 words
The screen of claim 1 wherein said third segment intersects said first segment at said one end thereof and said second segment at said one end thereof.
Claim 4
Dependent Claim
54 words
The screen of claim 1 wherein the cross-sectional shape of said wire further comprises a fifth substantially linear segment disposed substantially perpendicular to said first and second segments and having one end disposed proximate said one end of said second segment and the other end disposed proximate said other end of said third segment.
Claim 5
Dependent Claim
37 words
The screen of claim 1 wherein said grooves have concave, arcuate transverse cross sections and wherein the intersections of the apertures with the grooves include the point of deepest penetration of the respective groove into said pipe.
Claim 6
Dependent Claim
17 words
The screen of claim 4 wherein the apertures comprise elongate slots disposed longitudinally relative to said pipe.
Claim 7
Dependent Claim
11 words
The screen of claim 4 wherein the apertures comprise circular perforations.
References Cited (Backward Citations)
US975334A
Cited
US1202515A
Cited
US1273236A
Cited
US1878432A
Cited
US1845265A
Cited
US2120983A
Cited
US2744579A
Cited
US3221819A
Cited
US3385373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |