Patent US3227997A successfully refreshed from Google Patents.
US3227997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging
Assignee: Shell USA Inc
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Filing: 1960-11-07
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Granted: 1966-01-04
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Lamb
- 👤 Charles B Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:54
CPC Classifications
G; G01; G01V; G01V11/00; G01V11/002; E; E21; E21B; E21B47/00; E21B47/12; G01V1/00; G01V1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A TRANSMISSION CIRCUIT FOR TRANSMITTING SIGNALS FROM A DOWNHOLE ACOUSTICAL LOGGING TOOL TO SURFACE RECORDING INSTRUMENTS, SAID SIGNALS BEING SEPARATED BY A TIME ON THE ORDER OF 100 MICROSECONDS, SAID TRANSMISSION CIRCUIT COMPRISING: A DOWNHOLE ACCOUSTICAL LOGGING TOOL, A MULTI-CONDUCTOR CABLE HAVING A PLURALITY OF PARALLEL UNTWISTED CONDUCTORS, SAID CABLE BEING COUPLED TO AND IN ADDITION SUPPORTING SAID DOWNHOLE TOOL FOR MOVEMENT THROUGH A BOREHOLE; A SIGNAL PRODUCING MEANS IN THE DOWNHOLE TOOL, SAID SIGNAL PRODUCING MEANS BEING COUPLED TO A FIRST PAIR OF CONDUCTORS IN SAID CABLE, SAID FIRST PAIR OF CONDUCTORS BEING FORMED BY A FIRST AND SECOND CONDUCTOR; A SURFACE RECORDING INSTRUMENT SAID SURFACE RECORDING INSTRUMENT BEING COUPLED TO A SECOND PAIR OF CONDUCTORS IN SAID CABLE, SAID SECOND PAIR OF CONDUCTORS BEING FORMED BY SAID SECOND CONDUCTOR AND A THIRD CONDUCTOR.
Claim 2
Dependent Claim
135 words
A TRANSMISSION CIRCUIT FOR TRANSMITTING SIGNALS FROM A DOWNHOLE ACOUSTICAL LOGGING TOOL TO SURFACE RECORDING INSTRUMENTS, SAID SIGNALS BEING SEPARATED BY A TIME ON THE ORDER OF 100 MICROSECONDS, SAID TRANSMISSION CIRCUIT COMPRISING: A DOWNHOLE ACCOUSTICAL LOGGING TOOL, A MULTI-CONDUCTOR CABLE HAVING A PLURALITY OF PARALLEL UNTWISTED CONDUCTORS, SAID CABLE BEING COUPLED TO AND IN ADDITION SUPPORTING SAID DOWNHOLE TOOL FOR MOVEMENT THROUGH A BOREHOLE; A SIGNAL PRODUCING MEANS IN THE DOWNHOLE TOOL, SAID SIGNAL PRODUCING MEANS BEING COUPLED TO A FIRST PAIR OF CONDUCTORS IN SAID CABLE, SAID FIRST PAIR OF CONDUCTORS BEING FORMED BY A FIRST AND SECOND CONDUCTOR; A SURFACE RECORDING INSTRUMENT SAID SURFACE RECORDING INSTRUMENT BEING COUPLED TO A SECOND PAIR OF CONDUCTORS IN SAID CABLE, SAID SECOND PAIR OF CONDUCTORS BEING FORMED BY SAID SECOND CONDUCTOR AND A THIRD CONDUCTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |