US3105555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing scraper
Assignee: Halliburton Co
•
Filing: 1960-05-12
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Granted: 1963-10-01
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Expires: 1980-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Severo L Villalon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:09
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A CASING SCRAPER FOR USE IN WELLS, A CENTRAL MANDREL, A TAPERED SPREADER BLOCK OF RESILIENT RUBBER MATERIAL FIXED THEREON, AN OUTER SLEEVE SLIDABLY MOUNTED ON THE MANDREL, FRICTION DRAG MEANS MOUNTED ON THE SLEEVE ENGAGEABLE WITH THE CASING, A SHOULDER ON THE MANDREL FOR LIMITING LONGITUDINAL MOVEMENT OF THE SLEEVE THEREON, AND SCRAPER BLADES SLIDABLY MOUNTED ON THE SLEEVE FOR RADIAL MOVEMENT WITH RESPECT THERETO, SAID SCRAPER BLADES HAVING INNER TAPERED SURFACES COACTING WITH SAID TAPERED SPREADER BLOCK TO BE URGED RESILIENTLY OUTWARDLY THEREBY AND ENGAGE AND SCRAPE THE CASING WHEN THE MANDREL IS MOVED THROUGH THE CASING, WHILE THE MAIN LOAD OF THE SCRAPING ACTION IS TRANSMITTED BY THE SLEEVE TO THE SHOULDER ON THE MANDREL.
Claim 2
Dependent Claim
119 words
IN A CASING SCRAPER FOR USE IN WELLS, A CENTRAL MANDREL, A TAPERED SPREADER BLOCK OF RESILIENT RUBBER MATERIAL FIXED THEREON, AN OUTER SLEEVE SLIDABLY MOUNTED ON THE MANDREL, FRICTION DRAG MEANS MOUNTED ON THE SLEEVE ENGAGEABLE WITH THE CASING, A SHOULDER ON THE MANDREL FOR LIMITING LONGITUDINAL MOVEMENT OF THE SLEEVE THEREON, AND SCRAPER BLADES SLIDABLY MOUNTED ON THE SLEEVE FOR RADIAL MOVEMENT WITH RESPECT THERETO, SAID SCRAPER BLADES HAVING INNER TAPERED SURFACES COACTING WITH SAID TAPERED SPREADER BLOCK TO BE URGED RESILIENTLY OUTWARDLY THEREBY AND ENGAGE AND SCRAPE THE CASING WHEN THE MANDREL IS MOVED THROUGH THE CASING, WHILE THE MAIN LOAD OF THE SCRAPING ACTION IS TRANSMITTED BY THE SLEEVE TO THE SHOULDER ON THE MANDREL.
References Cited (Backward Citations)
US2667931A
Cited
US2825410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-30 | 1967-04-01 | 1967-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-30 | 1971-04-01 | 1971-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-30 | 1975-04-01 | 1975-10-01 | $7700.00 | Window Closed / Lapsed |