US3323326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well drilling shock absorber
Assignee: Individual
•
Filing: 1965-08-02
•
Granted: 1967-06-06
•
Expires: 1985-08-02
Abstract
No abstract record available.
Inventors
- 👤 John A Vertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:58
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A WELL DRILLING SHOCK ABSORBER INCLUDING TWO TELESCOPICALLY ARRANGED PARTS EACH HAVING A MEANS AT ONE END THEREOF ROR ATTACHMENT TO PARTS OF A WELL DRILLING STRING, SAID PARTS HAVING VERTICALLY OPPOSED HELICAL RIBS THEREON DISPOSED IN SPACED RELATION TO EACH OTHER, AND VERTICALLY EXTENDING SPLINES ALSO DISPOSED IN SPACED RELATION TO EACH OTHER, AND DEFORMABLE ELASTIC RUBBER-LIKE MATERIAL FILLING THE SPACES BETWEEN THE RIBS AND BETWEEN THE SPLINES THROUGH WHICH TORSIONAL AND AXIAL STRESSES CAN BE TRANSMITTED FROM ONE PART TO THE OTHER.
Claim 2
Dependent Claim
84 words
A WELL DRILLING SHOCK ABSORBER INCLUDING TWO TELESCOPICALLY ARRANGED PARTS EACH HAVING A MEANS AT ONE END THEREOF ROR ATTACHMENT TO PARTS OF A WELL DRILLING STRING, SAID PARTS HAVING VERTICALLY OPPOSED HELICAL RIBS THEREON DISPOSED IN SPACED RELATION TO EACH OTHER, AND VERTICALLY EXTENDING SPLINES ALSO DISPOSED IN SPACED RELATION TO EACH OTHER, AND DEFORMABLE ELASTIC RUBBER-LIKE MATERIAL FILLING THE SPACES BETWEEN THE RIBS AND BETWEEN THE SPLINES THROUGH WHICH TORSIONAL AND AXIAL STRESSES CAN BE TRANSMITTED FROM ONE PART TO THE OTHER.
References Cited (Backward Citations)
US1777156A
Cited
US2235605A
Cited
US2269799A
Cited
US2231037A
Cited
US2795398A
Cited
US3135103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |