US3340501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic well logging with time interval multiplication
Assignee: Dresser Industries Inc
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Filing: 1966-05-20
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Granted: 1967-09-05
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Heinz W Georgi
- 👤 Adrian P Brokaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:41
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
AN ACOUSTIC WELL LOGGING SYSTEM COMPRISING MEANS FOR PRODUCING IN A SUBSURFACE INSTRUMENT A FIRST PAIR OF ELECTRICAL PULSES SEPARATED IN TIME BY THE TRANSIT TIME OF SOUND THROUGH A RESPECTIVE PORTION OF THE FORMATIONS SURROUNDING A WELL BORE, MEANS FOR DERIVING FROM SAID FIRST PAIR OF PULSES A SECOND PAIR OF ELECTRICAL PULSES SPACED BY A TIME INTERVAL DIFFERENT FROM AND PROPORTIONALLY RELATED TO THE TIME INTERVAL BETWEEN SAID FIRST PAIR OF PULSES, MEANS FOR TRANSMITTING SAID SECOND PAIR OF PULSES TO THE SURFACE OF THE EARTH, AND MEANS AT THE SURFACE OF THE EARTH FOR UTILIZING SAID SECOND PAIR OF PULSES AS A MEASURE OF THE TRANSIT TIME OF SOUND THROUGH SAID RESPECTIVE PORTION OF THE FORMATIONS.
References Cited (Backward Citations)
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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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |