US3304536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic logging methods and apparatus employing two transmitters and four receivers
Assignee: Schlumberger Technology Corp
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Filing: 1964-03-31
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Granted: 1967-02-14
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Expires: 1984-03-31
Abstract
No abstract record available.
Inventors
- 👤 Frank P Kokesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD OF MAKING A WELL LOG OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH AN INCREMENT OF PREDETERMINED LENGTH IN EARTH FORMATIONS SURROUNDING A WELL BORE WHEREBY ERRORS INTRODUCED BY THE REFRACTIVE EFFECTS OF FLUID IN THE BORE AND VARIATIONS IN CROSS-SECTIONAL AREA OF THE BORE ARE SUBSTANTIALLY ELIMINATED, COMPRISING THE STEPS OF AT EACH OF A PLURALITY OF LEVELS IN THE WELL BORE MAKING INDIVIDUAL TRAVEL TIME MEASUREMENTS FROM A POINT ABOVE SAID INCREMENT TO RESPECTIVE ONES OF A FIRST PAIR OF POINTS STRADDLING AT LEAST A PORTION OF SAID INCREMENT, MAKING INDIVIDUAL TRAVEL TIME MEASUREMENTS FROM A POINT BELOW SAID INFREMENT TO RESPECTIVE ONES OF A SECOND PAIR OF POINTS STRADDLING AT LEAST A PORTION OF SAID INCREMENT SAID SECOND POINTS BEING LONGITUDINALLY DISPLACED FROM AND RELATED TO SAID FIRST POINTS TO BALANCE OUT THE EFFECTS OF VARIATION IN
Claim 2
Independent Claim
142 words
A METHOD OF MAKING A WELL LOG OF THE TRAVEL TIME OF ACOUSTIC ENERGY THROUGH AN INCREMENT OF PREDETERMINED LENGTH IN EARTH FORMATIONS SURROUNDING A WELL BORE WHEREBY ERRORS INTRODUCED BY THE REFRACTIVE EFFECTS OF FLUID IN THE BORE AND VARIATIONS IN CROSS-SECTIONAL AREA OF THE BORE ARE SUBSTANTIALLY ELIMINATED, COMPRISING THE STEPS OF AT EACH OF A PLURALITY OF LEVELS IN THE WELL BORE MAKING INDIVIDUAL TRAVEL TIME MEASUREMENTS FROM A POINT ABOVE SAID INCREMENT TO RESPECTIVE ONES OF A FIRST PAIR OF POINTS STRADDLING AT LEAST A PORTION OF SAID INCREMENT, MAKING INDIVIDUAL TRAVEL TIME MEASUREMENTS FROM A POINT BELOW SAID INFREMENT TO RESPECTIVE ONES OF A SECOND PAIR OF POINTS STRADDLING AT LEAST A PORTION OF SAID INCREMENT SAID SECOND POINTS BEING LONGITUDINALLY DISPLACED FROM AND RELATED TO SAID FIRST POINTS TO BALANCE OUT THE EFFECTS OF VARIATION IN
References Cited (Backward Citations)
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Cited
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Cited
US3212598A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |