Patent US3261402A successfully refreshed from Google Patents.
US3261402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation testing apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1965-09-13
•
Granted: 1966-07-19
•
Expires: 1985-09-13
Abstract
No abstract record available.
Inventors
- 👤 Frank R Whitten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:51
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A FLUID-TESTING TOOL COMPRISING: A BODY ADAPTED TO BE LOWERED THROUGH A WELL BORE EXTENDING THROUGH EARTH FORMATIONS; LONGITUDINALLY SPACED SAMPLE-ADMITTING MEANS ON ONE SIDE OF SAID BODY AND INCLUDING SEALING MEANS ABOUT EACH OF SAID SAMPLE-ADMITTING MEANS ADAPTED TO BE URGED INTO SEALING ENGAGEMENT WITH A WELL BORE MEANS IN SAID TOOL FOR PLACING SAID SEALING MEANS INTO SEALING ENGAGEMENT WITH A WELL BORE, ONE OF SAID SAMPLE-ADMITTING MEANS INCLUDING FLOW-SAMPLING MEANS MOUNTED FOR TRANSVERSE MOVEMENT THROUGH SAID SEALING MEANS INTO EARTH FORMATIONS WHEN SAID SEALING MEANS ARE IN SEALING ENGAGEMENT WITH A WELL BORE; AND HYDRAULIC MEANS FOR URGING SAID SAMPLING MEANS INTO EARTH FORMATIONS, THE OTHER OF SAID SAMPLE-ADMITTING MEANS BEING NORMALLY CLOSED TO FLUID FLOW FROM THE WELL BORE AND INCLUDING SELECTIVELY OPERABLE PERFORATING MEANS FOR SELECTIVELY OPENING SAID OTHER SAMPLE-ADMITTING MEANS THROUGH SAID SEALING MEANS.
Claim 2
Dependent Claim
140 words
A FLUID-TESTING TOOL COMPRISING: A BODY ADAPTED TO BE LOWERED THROUGH A WELL BORE EXTENDING THROUGH EARTH FORMATIONS; LONGITUDINALLY SPACED SAMPLE-ADMITTING MEANS ON ONE SIDE OF SAID BODY AND INCLUDING SEALING MEANS ABOUT EACH OF SAID SAMPLE-ADMITTING MEANS ADAPTED TO BE URGED INTO SEALING ENGAGEMENT WITH A WELL BORE MEANS IN SAID TOOL FOR PLACING SAID SEALING MEANS INTO SEALING ENGAGEMENT WITH A WELL BORE, ONE OF SAID SAMPLE-ADMITTING MEANS INCLUDING FLOW-SAMPLING MEANS MOUNTED FOR TRANSVERSE MOVEMENT THROUGH SAID SEALING MEANS INTO EARTH FORMATIONS WHEN SAID SEALING MEANS ARE IN SEALING ENGAGEMENT WITH A WELL BORE; AND HYDRAULIC MEANS FOR URGING SAID SAMPLING MEANS INTO EARTH FORMATIONS, THE OTHER OF SAID SAMPLE-ADMITTING MEANS BEING NORMALLY CLOSED TO FLUID FLOW FROM THE WELL BORE AND INCLUDING SELECTIVELY OPERABLE PERFORATING MEANS FOR SELECTIVELY OPENING SAID OTHER SAMPLE-ADMITTING MEANS THROUGH SAID SEALING MEANS.
References Cited (Backward Citations)
US2640542A
Cited
US2688369A
Cited
US2612346A
Cited
US2821256A
Cited
US2905247A
Cited
US2904113A
Cited
US2965176A
Cited
US3079793A
Cited
US3010517A
Cited
US3174547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |