Patent US3108639A successfully refreshed from Google Patents.
US3108639A
Expired / Lapsed
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Multiple string centralizer
Assignee: Individual
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Filing: 1960-05-20
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Granted: 1963-10-29
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Oran W Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:30
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1035; E21B17/1014; E21B17/1021; E21B17/1028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A WELL CENTRALIZER FOR POSITIONING MULTIPLE STRINGS OF TUBULAR MEMBERS IN A WELL BORE COMPRISING AN UPPER BODY AND A LOWER BODY, A PLURALITY OF FLEXIBLE LONGITUDINAL MEMBERS ATTACHED TO SAID UPPER AND SAID LOWER BODIES WHEREBY SAID UPPER AND SAID LOWER BODIES ARE CONNECTED TO EACH OTHER WITH SAID UPPER BODY BEING POSITIONED DIRECTLY ABOVE SAID LOWER BODY, A SAID LONGITUDINAL MEMBERS FORMING BOW SPRINGS FOR ENGAGING THE WELL BORE WALL AND THEREBY POSITIONING SAID UPPER AND SAID LOWER BODIES IN A PREDERERMINED POSITION IN A WELL BORE, EACH OF SAID UPPER AND LOWER BODIES INCLUDING A PLURALITY OF PAIRS OF ARCUATE PORTIONS FOR POSITIONING ON STRINGS OF TUBULAR MEMBERS, SAID PAIRS OF ARCUATE PORTIONS HAVING AN ARCUATE LENGTH LESS THAN THE CIRCUMFERENCE OF THE TUBULAR MEMBER ON WHICH THEY ARE POSITINED, MEANS HINGEDLY CONNECTING SAID PAIRS FORMING SAID UPPER BODY TOGETHER, AND MEANS HINGEDLY CONNECTING SAID PAIRS FORMING SAID LOWER BODY TOGETHER.
Claim 2
Dependent Claim
154 words
A WELL CENTRALIZER FOR POSITIONING MULTIPLE STRINGS OF TUBULAR MEMBERS IN A WELL BORE COMPRISING AN UPPER BODY AND A LOWER BODY, A PLURALITY OF FLEXIBLE LONGITUDINAL MEMBERS ATTACHED TO SAID UPPER AND SAID LOWER BODIES WHEREBY SAID UPPER AND SAID LOWER BODIES ARE CONNECTED TO EACH OTHER WITH SAID UPPER BODY BEING POSITIONED DIRECTLY ABOVE SAID LOWER BODY, A SAID LONGITUDINAL MEMBERS FORMING BOW SPRINGS FOR ENGAGING THE WELL BORE WALL AND THEREBY POSITIONING SAID UPPER AND SAID LOWER BODIES IN A PREDERERMINED POSITION IN A WELL BORE, EACH OF SAID UPPER AND LOWER BODIES INCLUDING A PLURALITY OF PAIRS OF ARCUATE PORTIONS FOR POSITIONING ON STRINGS OF TUBULAR MEMBERS, SAID PAIRS OF ARCUATE PORTIONS HAVING AN ARCUATE LENGTH LESS THAN THE CIRCUMFERENCE OF THE TUBULAR MEMBER ON WHICH THEY ARE POSITINED, MEANS HINGEDLY CONNECTING SAID PAIRS FORMING SAID UPPER BODY TOGETHER, AND MEANS HINGEDLY CONNECTING SAID PAIRS FORMING SAID LOWER BODY TOGETHER.
References Cited (Backward Citations)
US2297146A
Cited
US2640544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |