Patent US3089543A successfully refreshed from Google Patents.
US3089543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well casing suspending means
Assignee: Otis Engineering Corp
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Filing: 1958-10-29
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Granted: 1963-05-14
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Expires: 1978-10-29
Abstract
No abstract record available.
Inventors
- 👤 Raulins George Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:51
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A WELL TOOL FOR SUSPENDING AN INNER TUBULAR MEMBER IN AN OUTER TUBULAR MEMBER, COMPRISING: A TUBULAR HANGER MANDREL TELESCOPICALLY RECEIVING SAID INNER TUBULAR MEMBER; LOCKING MEANS MOUNTED EXTERNALLY ON SAID MANDREL FOR ENGAGEMENT WITH THE OUTER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF THE MANDREL IN THE OUTER TUBULAR MEMBER; AN INTERNAL LOCK MEANS CARRIED BY THE MANDREL IN ITS BORE ENGAGEABLE WITH THE INNER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF SAID INNER TUBULAR MEMBER IN THE MANDREL, SAID MANDREL HAVING AN INTERNAL RECESS IN ITS BORE, SAID INTERNAL LOCK MEANS INCLUDING A CAM RING MOUNTED IN SAID RECESS FOR LIMITED LONGITUDINAL MOVEMENT IN SAID MANDREL, AND GRIPPING MEANS IN SAID CAM RING MOVABLE INWARDLY BY SAID CAM RING INTO ENGAGEMENT WITH SAID INNER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF SAID INNER TUBULAR MEMBER RELATIVE TO SAID MANDREL, SAID GRIPPING MEANS HAVING INTERNAL SERRATION FOR BITING INTO THE EXTERNAL SURFACE OF SAID INNER TUBULAR MEMBER; INTERNAL SEAL MEANS CARRIED BY THE MANDREL ON A SHOULDER IN THE INTERNAL RECESS AND COMPRESSIBLE BETWEEN SAID CAM RING AND SAID SHOULDER OF SAID MANDREL FOR SEALING BETWEEN THE MANDREL AND THE
Claim 2
Dependent Claim
191 words
A WELL TOOL FOR SUSPENDING AN INNER TUBULAR MEMBER IN AN OUTER TUBULAR MEMBER, COMPRISING: A TUBULAR HANGER MANDREL TELESCOPICALLY RECEIVING SAID INNER TUBULAR MEMBER; LOCKING MEANS MOUNTED EXTERNALLY ON SAID MANDREL FOR ENGAGEMENT WITH THE OUTER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF THE MANDREL IN THE OUTER TUBULAR MEMBER; AN INTERNAL LOCK MEANS CARRIED BY THE MANDREL IN ITS BORE ENGAGEABLE WITH THE INNER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF SAID INNER TUBULAR MEMBER IN THE MANDREL, SAID MANDREL HAVING AN INTERNAL RECESS IN ITS BORE, SAID INTERNAL LOCK MEANS INCLUDING A CAM RING MOUNTED IN SAID RECESS FOR LIMITED LONGITUDINAL MOVEMENT IN SAID MANDREL, AND GRIPPING MEANS IN SAID CAM RING MOVABLE INWARDLY BY SAID CAM RING INTO ENGAGEMENT WITH SAID INNER TUBULAR MEMBER FOR LIMITING DOWNWARD MOVEMENT OF SAID INNER TUBULAR MEMBER RELATIVE TO SAID MANDREL, SAID GRIPPING MEANS HAVING INTERNAL SERRATION FOR BITING INTO THE EXTERNAL SURFACE OF SAID INNER TUBULAR MEMBER; INTERNAL SEAL MEANS CARRIED BY THE MANDREL ON A SHOULDER IN THE INTERNAL RECESS AND COMPRESSIBLE BETWEEN SAID CAM RING AND SAID SHOULDER OF SAID MANDREL FOR SEALING BETWEEN THE MANDREL AND THE
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |