Patent US2801323A successfully refreshed from Google Patents.
Patent US3909467A successfully refreshed from Google Patents.
US3909467A
Expired / Lapsed
US
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Downhole tool
Assignee: RANDOLPH CO
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Filing: 1973-08-22
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Granted: 1975-09-30
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Expires: 1993-08-22
Abstract
Abstract An improved downhole tool for well-logging, drilling, etc., is disclosed. The portions of the tool previously made of ordinary elastomers, such as bumpers, shock absorbers and protectors for electrical connections, are made of a flocked elastomeric material. The material contains 15-40 percent by weight of flocked fibers. The fibers are randomly oriented, and may be any of several materials, including polyester and cotton. The bubbling or ''''blow-up'''' previously encountered in these parts of the tool, is eliminated.
Inventors
- 👤 John Allen Tatum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:22
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
IN A DEVICE DESIGNED FOR USE UNDER HIGH PRESSURE CONDITIONS IN A LIQUID-FILLED BOREHOLE, HAVING AT LEAST ONE COMPONENT OF GAS-PERMEABLE FLEXURAL MATERIAL, THE IMPROVEMET COMPRISING: SAID FLEXURAL MATERIAL HAVING UNIFORMLY DISTRIBUTED THERETHROUGH FROM 15% TO 50 PERCENT BY WEIGHT OF RANDOMLY ORIENTED FLOCKED FIBERS, BEING OF NON-THERMOPLASTIC MATERIAL AND HAVING LENGTHS FROM ABOUT ONE SIXTYFOURTH INCH TO ABOUT ONE-FOURTH INCH.
Claim 2
Dependent Claim
61 words
IN A DEVICE DESIGNED FOR USE UNDER HIGH PRESSURE CONDITIONS IN A LIQUID-FILLED BOREHOLE, HAVING AT LEAST ONE COMPONENT OF GAS-PERMEABLE FLEXURAL MATERIAL, THE IMPROVEMET COMPRISING: SAID FLEXURAL MATERIAL HAVING UNIFORMLY DISTRIBUTED THERETHROUGH FROM 15% TO 50 PERCENT BY WEIGHT OF RANDOMLY ORIENTED FLOCKED FIBERS, BEING OF NON-THERMOPLASTIC MATERIAL AND HAVING LENGTHS FROM ABOUT ONE SIXTYFOURTH INCH TO ABOUT ONE-FOURTH INCH.
Claim 3
Dependent Claim
17 words
The device of claim 1 wherein said flocked fibers comprise a mixture of fibers of varying lengths.
Claim 4
Dependent Claim
26 words
The device of claim 1 wherein said flexural material is selected from the group consisting of neoprene rubber, acrylonitrile-butadiene rubber, silicone rubber, fluoro-elastomer, and epichlorohydrin rubber.
Claim 5
Dependent Claim
24 words
The device of claim 1 wherein said fibers are selected from the group of materials consisting of rayon, polyesters, cotton, wool, asbestos, and glass.
Claim 6
Independent Claim
56 words
A method of enhancing life of a downhole tool having at least one component of gas-permeable flexural material, comprising the step of uniformly incorporating throughout said flexural material randomly oriented fibers, in a concentration of from about 15 to about 50 percent by weight, said fibers having lengths between about 1/64 inch and about 1/4 inCh.
Claim 7
Independent Claim
56 words
A method of enhancing life of a downhole tool having at least one component of gas-permeable flexural material, comprising the step of uniformly incorporating throughout said flexural material randomly oriented fibers, in a concentration of from about 15 to about 50 percent by weight, said fibers having lengths between about 1/64 inch and about 1/4 inCh.
Claim 8
Dependent Claim
22 words
The method of claim 5 wherein said fibers are selected from the group consisting of rayon, polyesters, cotton, wool, asbestos, and glass.
Claim 9
Dependent Claim
26 words
The method of claim 6, wherein said flexural material is selected from the group consisting of neoprene rubber, acrylonitrile-butadiene rubber, silicone rubber, fluoroelastomer, and epichlorohydrin rubber.
Claim 10
Independent Claim
45 words
A method of preventing bubbling of an elastomeric tool component upon withdrawal from a high pressure borehole, comprising forming said component of 50-85 percent of elastomeric material and 15-50 percent of randomly oriented flocked fibers having lengths from about 1/64 inch to about 1/4 inch.
Claim 11
Independent Claim
45 words
A method of preventing bubbling of an elastomeric tool component upon withdrawal from a high pressure borehole, comprising forming said component of 50-85 percent of elastomeric material and 15-50 percent of randomly oriented flocked fibers having lengths from about 1/64 inch to about 1/4 inch.
Claim 12
Dependent Claim
22 words
The method of claim 8, wherein said fibers are selected from the group consisting of rayon, polyesters, cotton, wool, asbestos, and glass.
Claim 13
Dependent Claim
26 words
The method of claim 9, wherein said elastomeric material is selected from the group consisting of neoprene rubber, acrylonitrile-butadiene rubber, silicone rubber, fluoroelastomer, and epichlorohydrin rubber.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |