Patent US4516608A successfully refreshed from Google Patents.
US4516608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular member
Assignee: Electro Petroleum Inc
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Filing: 1982-09-29
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Granted: 1985-05-14
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Expires: 2002-09-29
Abstract
Abstract An elongated tubular member for use in connection with a subterranean well, such as deep bore oil well, is comprised of at least two annular layers which may be bonded together. The first annular layer is comprised of a fiber reinforced organic resin material and the second layer is comprised of a refractory material. The two layers combined to provide an inexpensive, lightweight tubular member having relatively high compressive strength.
Inventors
- 👤 Charles H. Titus
- 👤 John K. Wittle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:15
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/14; E; E21; E21B; E21B17/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
51 words
An elongated tubular member resistant to both tensile and compressive deformation and resistant to electrical stress comprised of a first annular layer of electrically non-conducting fiber reinforced organic resin material resistant to tensile deformation and a second annular layer of electrically non-conducting refractory material resistant to thermal degradation and compressive deformation.
Claim 2
Dependent Claim
51 words
An elongated tubular member resistant to both tensile and compressive deformation and resistant to electrical stress comprised of a first annular layer of electrically non-conducting fiber reinforced organic resin material resistant to tensile deformation and a second annular layer of electrically non-conducting refractory material resistant to thermal degradation and compressive deformation.
Claim 3
Dependent Claim
50 words
An elongated tubular member resistant to both tensile and compressive deformation comprised of a first annular layer of fiber reinforced organic resin material resistant to tensile deformation and a second annular layer of refractory material resistant to thermal degradation and compressive deformation, said first and second layers being bonded together.
Claim 4
Dependent Claim
50 words
An elongated tubular member resistant to both tensile and compressive deformation comprised of a first annular layer of fiber reinforced organic resin material resistant to tensile deformation and a second annular layer of refractory material resistant to thermal degradation and compressive deformation, said first and second layers being bonded together.
Claim 5
Dependent Claim
90 words
An elongated tubular member resistant to both tensile and compressive deformation comprised of a first annular layer of fiber reinforced organic resin material resistant to tensile deformation, a second annular layer of refractory material resistant to thermal degradation and compressive deformation; and collar means disposed at opposite ends of the first and second layers and in engagement with the first and second layers, said collar means simultaneously maintaining the first annular layer of fiber reinforced organic resin material in tension and the second annular layer of refractory material in compression.
Claim 6
Dependent Claim
90 words
An elongated tubular member resistant to both tensile and compressive deformation comprised of a first annular layer of fiber reinforced organic resin material resistant to tensile deformation, a second annular layer of refractory material resistant to thermal degradation and compressive deformation; and collar means disposed at opposite ends of the first and second layers and in engagement with the first and second layers, said collar means simultaneously maintaining the first annular layer of fiber reinforced organic resin material in tension and the second annular layer of refractory material in compression.
Claim 7
Dependent Claim
16 words
The structure as recited in claims 1, 2, or 3 wherein the refractory fiber is glass.
Claim 8
Dependent Claim
47 words
The structure as recited in claim 1, 2 or 3 wherein said tubular member comprises a sucker rod for use in connection with the pumping of fluids out of a subterranean well and wherein the first annular layer is positioned radially inside of the second annular layer.
Claim 9
Dependent Claim
22 words
The structure as recited in claim 5 wherein the second layer is comprised of a plurality of segments coupled in end-to-end relation.
Claim 10
Dependent Claim
13 words
The structure as recited in claim 6 wherein the anular segments are ceramic.
Claim 11
Dependent Claim
36 words
The structure as recited in claim 1, 2 or 3 wherein said tubular member comprises a casing for a subterranean well and wherein the second annual layer is positioned radially inside of the first annular layer.
Claim 12
Dependent Claim
27 words
The structure as recited in claim 1, 2 or 3 wherein the second layer is comprised of a plurality of annular ceramic segments coupled in end-to-end relation.
Claim 13
Dependent Claim
46 words
The structure as recited in claim 1, 2, or 3 comprising an annular layer of a dielectric polymer film disposed between the first annular layer of fiber reinforced resin and the second annular layer of refractory material to increase the dielectric strength of the tubular member.
Claim 14
Dependent Claim
14 words
The structure as recited in claim 10 wherein the dielectric polymer film is polytetrafluoroethylene.
Claim 15
Dependent Claim
41 words
The structure as recited in claim 1 including collar means disposed at opposite ends of the first and second layers in engagement with the first and second layers for maintaining said second layer in compression and said first layer in tension.
Claim 16
Dependent Claim
39 words
The structure as recited in claim 1, 2 or 3 comprising a third annular layer of fiber reinforced resin material disposed between said first annular layer of fiber reinforced resin material and said second annular layer of refractory material.
Claim 17
Dependent Claim
30 words
The structure as recited in claim 13 comprising a fourth annular layer of fiber reinforced resin material disposed between the first and third annular layers of fiber reinforced resin material.
Claim 18
Dependent Claim
44 words
The structure as recited in claim 14 wherein one of said third and fourth annular layers of fiber reinforced resin material includes reinforcing fibers oriented generally longitudinally of said structure and the other annular layer includes reinforcing fibers oriented generally circumferentially of said structure.
Claim 19
Dependent Claim
31 words
The structure as recited in claim 15 wherein said reinforcing fibers of the third annular layer are oriented longitudinally and said reinforcing fibers of the fourth annular layer are oriented circumferentially.
Claim 20
Dependent Claim
35 words
The structure as recited in claim 14 comprising a fifth annular layer of dielectric polymer film disposed between said first annular layer of fiber reinforced resin material and said second annular layer of refractory material.
Claim 21
Dependent Claim
26 words
The structure as recited in claim 17 wherein said fifth annular layer is disposed between said first and fourth annular layers of fiber reinforced resin material.
Claim 22
Dependent Claim
14 words
The structure as recited in claim 17 wherein the dielectric polymer film is polytetrafluoroethylene.
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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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |