US3319718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well tester
Assignee: Schlumberger Technology Corp
•
Filing: 1966-10-31
•
Granted: 1967-05-16
•
Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jerry C Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:06
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/087; E21B49/088
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
APPARATUS FORMING A VALVE SYSTEM IN A WELL TOOL SUSPENDED FROM A STRING OF PIPE INCLUDING: A MAIN VALVE MEANS HAVING A PORT AND MOVABLE MEANS FOR SELECTIVELY PASSING FLUID THROUGH THE PORT, AND AN AUXILIARY VALVE MEANS HAVING LONGITUDINALLY SPACED PORTS AND MEANS FOR SELECTIVELY PASSING FLUID THROUGH ONE OF SAID LONGITUDINALLY SPACED PORTS, SAID LAST MENTIONED VALVE MEANS BEING RESPONSIVE TO LONGITUDINAL POSITIONING OF SAID STRING OF PIPE FOR SELECTIVELY CLOSING SAID AUXILIARY VALVE MEANS.
References Cited (Backward Citations)
USRE24352E
Cited
US2719588A
Cited
US2910081A
Cited
US3020959A
Cited
US3096823A
Cited
US3111169A
Cited
US3087307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |