US3304538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic well logging downhole control system
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1966-02-07
•
Granted: 1967-02-14
•
Expires: 1986-02-07
Abstract
No abstract record available.
Inventors
- 👤 Fred W Zill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:12
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
IN A WELL LOGGING APPARATUS ADAPTED TO BE SUSPENDED BELOW THE EARTH''S SURFACE IN A WELL BORE BY A CABLE INCLUDING A SINGLE TRANSMISSION CONDUCTOR, A CONTROL FUNCTION CIRCUIT OPERABLE BY SIGNALS TRANSMITTED FROM THE SURFACE OVER THE CONDUCTOR, COMPRISING FIRST CIRCUIT MEANS RESPONSIVE TO FIRST SIGNALS ON THE CONDUCTOR FOR DEVELOPING FIRST OUTPUT SIGNALS, SECOND CIRCUIT MEANS HAVING AN INPUT CONNECTABLE TO THE CONDUCTOR AND RESPONSIVE TO SECOND SIGNALS ON SUCH CONDUCTOR FOR DEVELOPING CONTROL FUNCTION SIGNALS, AND SWITCH MEANS CONNECTED BETWEEN THE INPUT OF SAID SECOND CIRCUIT MEANS AND THE CONDUCTOR, SAID SWITCH MEANS BEING RESPONSIVE TO SAID FIRST OUTPUT SIGNALS TO ACTUATE SAID SWITCH MEANS TO SELECTIVELY DECOUPLE THE SECOND CIRCUIT MEANS FROM THE CONDUCTOR.
Claim 2
Dependent Claim
118 words
IN A WELL LOGGING APPARATUS ADAPTED TO BE SUSPENDED BELOW THE EARTH''S SURFACE IN A WELL BORE BY A CABLE INCLUDING A SINGLE TRANSMISSION CONDUCTOR, A CONTROL FUNCTION CIRCUIT OPERABLE BY SIGNALS TRANSMITTED FROM THE SURFACE OVER THE CONDUCTOR, COMPRISING FIRST CIRCUIT MEANS RESPONSIVE TO FIRST SIGNALS ON THE CONDUCTOR FOR DEVELOPING FIRST OUTPUT SIGNALS, SECOND CIRCUIT MEANS HAVING AN INPUT CONNECTABLE TO THE CONDUCTOR AND RESPONSIVE TO SECOND SIGNALS ON SUCH CONDUCTOR FOR DEVELOPING CONTROL FUNCTION SIGNALS, AND SWITCH MEANS CONNECTED BETWEEN THE INPUT OF SAID SECOND CIRCUIT MEANS AND THE CONDUCTOR, SAID SWITCH MEANS BEING RESPONSIVE TO SAID FIRST OUTPUT SIGNALS TO ACTUATE SAID SWITCH MEANS TO SELECTIVELY DECOUPLE THE SECOND CIRCUIT MEANS FROM THE CONDUCTOR.
Claim 3
Dependent Claim
74 words
AN ELECTRICAL SYSTEM FOR CONVERTING AN ANALOG SIGNAL INTO A DIGITAL SIGNAL INCLUDING: CIRCUIT MEANS HAVING AN INPUT AND OUTPUT AND OPERABLE TO DEVELOP A PULSE OUTPUT; CURRENT STORAGE MEANS COUPLED TO SAID INPUT TO PROVIDE AN INPUT TRIGGER SIGNAL UPON CHARGING UP TO A PREDETERMINED VALUE; SELECTIVELY OPERABLE DISCHARGE MEANS COUPLED TO SAID CURRENT STORAGE MEANS AND RESPONSIVE TO A PULSE OUTPUT SIGNAL FROM SAID CIRCUIT MEANS TO DISCHARGE SAID CURRENT STORAGE MEANS.
Claim 4
Dependent Claim
74 words
AN ELECTRICAL SYSTEM FOR CONVERTING AN ANALOG SIGNAL INTO A DIGITAL SIGNAL INCLUDING: CIRCUIT MEANS HAVING AN INPUT AND OUTPUT AND OPERABLE TO DEVELOP A PULSE OUTPUT; CURRENT STORAGE MEANS COUPLED TO SAID INPUT TO PROVIDE AN INPUT TRIGGER SIGNAL UPON CHARGING UP TO A PREDETERMINED VALUE; SELECTIVELY OPERABLE DISCHARGE MEANS COUPLED TO SAID CURRENT STORAGE MEANS AND RESPONSIVE TO A PULSE OUTPUT SIGNAL FROM SAID CIRCUIT MEANS TO DISCHARGE SAID CURRENT STORAGE MEANS.
References Cited (Backward Citations)
US2876434A
Cited
US3191145A
Cited
US2901685A
Cited
US2973505A
Cited
US2963640A
Cited
US3187301A
Cited
US3060388A
Cited
US3098947A
Cited
US3177467A
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 |