US3335802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface shifting apparatus
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1965-01-25
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Granted: 1967-08-15
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Iii Walter H Seyffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:43
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/02; E21B34/00; E21B34/06; E21B34/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
154 words
IN APPARATUS FOR OPERATING A DEVICE IN A WELL BORE; A BODY ADAPTED TO BE LOWERED IN THE WELL BORE ON A RUNNING-IN STRING; A COUPLING DOG CARRIED BY SAID BODY; SPRING MEANS TENDING TO SHIFT SAID DOG LATERALLY OUTWARDLY OF SAID BODY FOR ENGAGEMENT WITH THE DEVICE; A RETAINING AND RETRACTING SLEEVE SHIFTABLE LONGITUDINALLY ON SAID BODY BETWEEN A POSITION ENGAGING AND RETAINING SAID DOG IN RETRACTED POSITION ON SAID BODY AND A POSITION PERMITTING SAID SPRING MEANS TO SHIFT SAID DOG LATERALLY OUTWARDLY OF SAID BODY; MEANS CONNECTED TO SAID SLEEVE AND ENGAGEABLE WITH THE DEVICE FOR HOLDING SAID SLEEVE RELATIVELY STATIONARY IN THE WELL BORE TO ALLOW SAID BODY TO BE MOVABLE LONGITUDINALLY OF SAID SLEEVE AND SHIFT SAID DOG FROM SAID SLEEVE; AND SPRING MEANS ENGAGING SAID BODY AND SLEEVE FOR SHIFTING SAID SLEEVE LONGITUDINALLY OF SAID BODY INTO ENGAGEMENT WITH SAID DOG TO RETRACT SAID DOG ON SAID BODY.
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |