US3173485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well formation isolation apparatus
Assignee: Halliburton Co
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Filing: 1958-08-26
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Granted: 1965-03-16
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Expires: 1978-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel C Bretzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:50
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
A WELL BORE FLUID ISOLATION MEMBER ADAPTED FOR USE WITH A WIRELINE TESTING APPARATUS, COMPRISING, A RESILIENT PAD MEMBER OF MATERIAL HAVING PREDETERMINED RESISTANCE TO DEFORMATION, SAID PAD MEMBER HAVING A FRONT AND A REAR REAR FACE, A CENTRAL PORTION AND A HOLE DEFINE THROUGH SAID CENTRAL PORTION BETWEEN SAID FRONT AND REAR FACE, A SUPPORT MEMBER IN CONNECTION WITH A PORTION OF SAID REAR FACE, SAID SUPPORT MEMBER BEING ADAPTED FOR CONNECTION WITH TESTING APPARATUS, A SUBSTANTIAL PORTION OF SAID REAR FACE OF SAID PAD MEMBER BEING EXPOSED TO PRESSURE OF WELL BORE FLUIDS, A RIGID CIRCUIT CONNECTED INTO SAID SUPPORT MEMBER AND EXTENDING FROM SAID SUPPORT MEMBER THROUGH SAID HOLE TO NEAR SAID FRONT FACE, A RESILIENT ENCLOSURE MEMBER OF MATERIAL HAVING GREATER RESISTANCE TO DEFORMATION THAN SAID PAD MEMBER DISPOSED AROUND A SELECTED LENGTH OF SAID CIRCUIT AND FORMING AN INTEGRAL PORTION OF SAID CENTRAL PORTION.
References Cited (Backward Citations)
US2821256A
Cited
US2851107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |