US3239008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically set tandem packer apparatus
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1962-11-05
•
Granted: 1966-03-08
•
Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Leutwyler Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:51
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN APPARATUS ADAPTED TO BE LOWERED IN A WELL BORE: A PLURALITY OF WELL PACKERS SECURED TOGETHER AND HAVING INTERCONNECTING PASSAGES; EACH PACKER INCLUDING NORMALLY RETRACTED MEANS AND HYDRAULICALLY OPERABLE MEANS COMMUNICATING WITH AND RESPONSIVE TO THE HYDROSTATIC HEAD OF FLUID ITS PACKET PASSAGE FOR EXPANDING SAID NORMALLY RETRACTED MEANS OUTWARDLY INTO ENGAGEMENT WITH THE WALL OF THE WELL BORE; EACH PACKER HAVING MEANS PREVENTING THE HYDROSTATIC HEAD OF FLUID FROM PASSING FROM ITS PASSAGE TO ITS FLUID OPERATED MEANS; AND MEANS FOR SHIFTING SAID PREVENTING MEANS OF SUCH PACKER TO A POSITION PERMITTING THE HYDROSTATIC HEAD OF FLUID FROM ITS PASSAGE TO PASS TO ITS FLUID OPERATED MEANS TO EXPAND THE NORMALLY RETRACTED MEANS OF THE PACKER.
Claim 2
Dependent Claim
118 words
IN APPARATUS ADAPTED TO BE LOWERED IN A WELL BORE: A PLURALITY OF WELL PACKERS SECURED TOGETHER AND HAVING INTERCONNECTING PASSAGES; EACH PACKER INCLUDING NORMALLY RETRACTED MEANS AND HYDRAULICALLY OPERABLE MEANS COMMUNICATING WITH AND RESPONSIVE TO THE HYDROSTATIC HEAD OF FLUID ITS PACKET PASSAGE FOR EXPANDING SAID NORMALLY RETRACTED MEANS OUTWARDLY INTO ENGAGEMENT WITH THE WALL OF THE WELL BORE; EACH PACKER HAVING MEANS PREVENTING THE HYDROSTATIC HEAD OF FLUID FROM PASSING FROM ITS PASSAGE TO ITS FLUID OPERATED MEANS; AND MEANS FOR SHIFTING SAID PREVENTING MEANS OF SUCH PACKER TO A POSITION PERMITTING THE HYDROSTATIC HEAD OF FLUID FROM ITS PASSAGE TO PASS TO ITS FLUID OPERATED MEANS TO EXPAND THE NORMALLY RETRACTED MEANS OF THE PACKER.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |