US3191143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic delay member for well logging tools
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1961-05-16
•
Granted: 1965-06-22
•
Expires: 1981-05-16
Abstract
No abstract record available.
Inventors
- 👤 George H Pardue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:29
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/52; G01V1/523
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
APPARATUS FOR USE IN ACOUSTICALLY SURVEYING A WELL BORE COMPRISING: AN ELONGATED STEEL MEMBER ADAPTED TO BE PASSED THROUGH A WELL BORE; AT LEAST TWO ACOUSTIC TRANSDUCERS MOUNTED IN A FIXED, SPACED-APART RELATIONSHIP RELATIVE TO SAID MEMBER, THE PORTION OF SAID MEMBER BETWEEN SAID TRANSDUCERS BEING OF A SOLID-WALLED, TUBULAR CONFIGURATION, HAVING INNER AND OUTER WALL SURFACES EACH PROVIDED WITH UNDULATIONS ALONG ITS LENGTH TO PROVIDE ONLY TORTUOUS ACOUSTIC PATHS LENGTHWISE OF SAID PORTION OF SAID MEMBER WHICH ARE LONGER THAN THE STRAIGHT-LINE DISTANCE BETWEEN SAID TRANSDUCERS.
References Cited (Backward Citations)
US2350371A
Cited
US2722282A
Cited
US2938592A
Cited
US2757358A
Cited
US2993553A
Cited
US2848672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |