US3230740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill string shock absorber and vibration dampener
Assignee: Individual
•
Filing: 1963-10-16
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Granted: 1966-01-25
•
Expires: 1983-10-16
Abstract
No abstract record available.
Inventors
- 👤 Fred K Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:33
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B17/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A DEVICE FOR USE IN ABSORBING SHOCK AND DAMPENING VIBRATION UPON A DRILL STRING AND BIT IN THE DRILLING OF A WELL, COMPRISING FIRST AND SECOND TUBULAR MEMBERS MOVABLE RELATIVE TO ONE ANOTHER AND HAVING MEANS THEREON FOR CONNECTING THEM AS PART OF THE DRILL STRING, MEANS INCLUDING A PLURALITY OF PISTONS ON ONE OF SAID TUBULAR MEMBERS, AND MEANS ON THE OTHER TUBULAR MEMBER FOR SUCCESSIVELY MOVING DIFFERENT PISTONS UPON MOVEMENT OF SAID TUBULAR MEMBERS IN ONE DIRECTIONAL SENSE RELATIVE TO ONE ANOTHER, EACH OF SAID PISTONS HAVING A PRESSURERESPONSIVE SURFACE EXPOSED TO WELL FLUID PRESSURE SO AS TO OPPOSE ITS MOVEMENT BY SAID MEANS ON THE OTHER TUBULAR MEMBER AND THEREBY OPPOSE THE RELATIVE MOVEMENT OF SAID TUBULAR MEMBERS IN SAID ONE DIRECTIONAL SENSE.
Claim 2
Independent Claim
126 words
A DEVICE FOR USE IN ABSORBING SHOCK AND DAMPENING VIBRATION UPON A DRILL STRING AND BIT IN THE DRILLING OF A WELL, COMPRISING FIRST AND SECOND TUBULAR MEMBERS MOVABLE RELATIVE TO ONE ANOTHER AND HAVING MEANS THEREON FOR CONNECTING THEM AS PART OF THE DRILL STRING, MEANS INCLUDING A PLURALITY OF PISTONS ON ONE OF SAID TUBULAR MEMBERS, AND MEANS ON THE OTHER TUBULAR MEMBER FOR SUCCESSIVELY MOVING DIFFERENT PISTONS UPON MOVEMENT OF SAID TUBULAR MEMBERS IN ONE DIRECTIONAL SENSE RELATIVE TO ONE ANOTHER, EACH OF SAID PISTONS HAVING A PRESSURERESPONSIVE SURFACE EXPOSED TO WELL FLUID PRESSURE SO AS TO OPPOSE ITS MOVEMENT BY SAID MEANS ON THE OTHER TUBULAR MEMBER AND THEREBY OPPOSE THE RELATIVE MOVEMENT OF SAID TUBULAR MEMBERS IN SAID ONE DIRECTIONAL SENSE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |