Patent US4727702A successfully refreshed from Google Patents.
US3608633A
Expired / Lapsed
US
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Well tube scraping tool
Assignee: Mobil Oil AS
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Filing: 1969-09-17
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Granted: 1971-09-28
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Expires: 1989-09-17
Abstract
Abstract A piston section of a TFL tool having an elastic substantially spherical sealing member is serially connected through a balland-socket flexible coupling to a scraper section having radially extending scraper blades. Clamping members located on opposite sides of the sealing member may be moved with respect to one another along the axis of the TFL tool to adjust the diameter of the sealing member by varying the axially compressive forces on the sealing member.
Inventors
- 👤 William A Talley Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:21
CPC Classifications
B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0553; E; E21; E21B; E21B23/00; E21B23/08; E21B23/10; E21B37/00; E21B37/02; E21B37/04; F; F16; F16L; F16L55/00; F16L55/26; F16L55/28; F16L55/30; F16L55/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
A piston section of a tool string adapted to be pumped through a well tubing for scraping deposits from the inner wall of the tubing comprising: a substantially spherical elastic sealing member having an adjustable outside diameter; a coupling means for coupling said piston section to at least one other section of the tool string; a fluid bypass passageway extending through said elastic sealing member, said bypass means including means to adjust flow therethrough; and an adjusting means including first and second clamping means located on opposite sides of said sealing member along the axis of the tool string and a hollow shaft extending therebetween, said first and second clamping members being mutually movable along the axis of the tool string to adjust the outside diameter of said sealing member by increasing or decreasing the axial compressive forces on said sealing member, said clamping means further comprises a nut and said hollow shaft includes external threads for engaging said nut, said first clamping means being rigidly affixed to said shaft and said second clamping means being movable along said shaft between said nut and said sealing member.
Claim 2
Dependent Claim
187 words
A piston section of a tool string adapted to be pumped through a well tubing for scraping deposits from the inner wall of the tubing comprising: a substantially spherical elastic sealing member having an adjustable outside diameter; a coupling means for coupling said piston section to at least one other section of the tool string; a fluid bypass passageway extending through said elastic sealing member, said bypass means including means to adjust flow therethrough; and an adjusting means including first and second clamping means located on opposite sides of said sealing member along the axis of the tool string and a hollow shaft extending therebetween, said first and second clamping members being mutually movable along the axis of the tool string to adjust the outside diameter of said sealing member by increasing or decreasing the axial compressive forces on said sealing member, said clamping means further comprises a nut and said hollow shaft includes external threads for engaging said nut, said first clamping means being rigidly affixed to said shaft and said second clamping means being movable along said shaft between said nut and said sealing member.
Claim 3
Dependent Claim
59 words
The combination of claim 1 including: a scraper section and a flexible coupling means located between said piston section and said scraper section wherein said scraper section includes spring-loaded helical scraper blades extending axially along said scraper section, and said scraper section having at least one opening for bypass fluid communication between said hollow shaft and said scraper blades.
Claim 4
Dependent Claim
15 words
The combination of claim 2 wherein said flexible coupling means is of the ball-and-socket type.
Claim 5
Dependent Claim
109 words
A tool adapted to be pumped through tubing or the like comprising: a piston section having: a support member; a substantially spherical sealing member mounted on the support member, said sealing member being elastic; a pair of adjustment means on said support means, each of said means in engagement with said sealing member on a diametrically opposed side from the other of said means, each of said adjustment means being mounted for relative movement with respect to the other along the axis of the tool to thereby adjust the diameter of said sealing member; a tool section; and means for flexibly connecting said piston section to said tool section.
Claim 6
Dependent Claim
109 words
A tool adapted to be pumped through tubing or the like comprising: a piston section having: a support member; a substantially spherical sealing member mounted on the support member, said sealing member being elastic; a pair of adjustment means on said support means, each of said means in engagement with said sealing member on a diametrically opposed side from the other of said means, each of said adjustment means being mounted for relative movement with respect to the other along the axis of the tool to thereby adjust the diameter of said sealing member; a tool section; and means for flexibly connecting said piston section to said tool section.
Claim 7
Dependent Claim
15 words
The tool of claim 4 wherein: said flexible connecting means is of the ball-and-socket type.
Claim 8
Dependent Claim
13 words
The tool of claim 4 including: a fluid bypass through said piston section.
Claim 9
Dependent Claim
19 words
The tool of claim 6 including: means for adjusting the flow through said fluid bypass through said piston section.
Claim 10
Dependent Claim
19 words
The tool of claim 7 wherein said tool section comprises: a scraper means having outwardly biased, helical scraper blades.
Claim 11
Dependent Claim
26 words
The tool of claim 8 wherein: said scraper section has at least one opening communicating said fluid bypass through said piston section with said scraper blades.
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |