US3603795A
Expired / Lapsed
US
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Method and device to measure the speed of water in a polyphase flow
Assignee: Schlumberger Technology Corp
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Filing: 1968-10-31
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Granted: 1971-09-07
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Expires: 1988-10-31
Abstract
Abstract An illustrative embodiment of the invention measures water speed through oxygen activation. Typically, neutrons of sufficient energy to initiate 016(n,p)N16 reactions irradiate a fluid stream, as for example, the usual polyphase stream of fluids flowing through the borehole of a producing oil well. Two gamma ray detectors spaced at different distances from each other downstream from the neutron source register the 6 mev. gamma radiation that characterizes N16 disintegration. The water speed then is determined through the ratio of the counts registered by the two detectors.
Inventors
- 👤 Louis A Allaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:03
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/087; E21B49/0875; G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/101; G21; G21H; G21H5/00; G21H5/02
Claims Analysis
Total Claims: 0
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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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |