US3091293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plugging device for wells
Assignee: Dresser Industries Inc
•
Filing: 1959-07-10
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Granted: 1963-05-28
•
Expires: 1979-07-10
Abstract
No abstract record available.
Inventors
- 👤 Dale L Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:13
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B33/00; E21B33/10; E21B33/12; E21B33/1204; E21B33/129; E21B33/1293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A DRILLABLE BRIDGE PLUG, A TUBULAR SUPPORT; UPPER AND LOWER ANCHOR MEMBERS ON THE SUPPORT ARRANGED TO BE EXPANDED INTO ENGAGEMENT WITH A CASING; EXPANDER MEMBERS DISPOSED ON THE SUPPORT FOR EXPANDING THE ANCHOR MEMBERS OUTWARDLY INTO ENGAGEMENT WITH THE CASING; A CLOSURE MEMBER CLOSING THE BORE THROUGH THE SUPPORT AND LOCATED ABOVE THE ANCHOR MEMBERS WHEN THE ANCHOR MEMBERS HAVE BEEN EXPANDED INTO ENGAGEMENT WITH THE CASING; AN UPWARDLY EXTENDING PORTION OF THE SUPPORT EXTENDING ABOVE THE CLOSURE MEMBER; AND THREADS ARRANGED INTERIORLY OF THE EXTENSION, ARRANGED TO RECEIVE EXTERIORLY THREADED LATCHING SEGMENTS OF A RUNNING TOOL.
Claim 2
Dependent Claim
99 words
IN A DRILLABLE BRIDGE PLUG, A TUBULAR SUPPORT; UPPER AND LOWER ANCHOR MEMBERS ON THE SUPPORT ARRANGED TO BE EXPANDED INTO ENGAGEMENT WITH A CASING; EXPANDER MEMBERS DISPOSED ON THE SUPPORT FOR EXPANDING THE ANCHOR MEMBERS OUTWARDLY INTO ENGAGEMENT WITH THE CASING; A CLOSURE MEMBER CLOSING THE BORE THROUGH THE SUPPORT AND LOCATED ABOVE THE ANCHOR MEMBERS WHEN THE ANCHOR MEMBERS HAVE BEEN EXPANDED INTO ENGAGEMENT WITH THE CASING; AN UPWARDLY EXTENDING PORTION OF THE SUPPORT EXTENDING ABOVE THE CLOSURE MEMBER; AND THREADS ARRANGED INTERIORLY OF THE EXTENSION, ARRANGED TO RECEIVE EXTERIORLY THREADED LATCHING SEGMENTS OF A RUNNING TOOL.
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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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |