Patent US3631385A successfully refreshed from Google Patents.
US3631385A
Expired / Lapsed
US
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Holographic well-logging system
Assignee: BP America Production Co
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Filing: 1969-11-24
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Granted: 1971-12-28
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Expires: 1989-11-24
Abstract
Abstract By an adaptation of elastic-wave holography, data are recorded from which a hologram can be prepared for reconstructing an image of a well wall to show fractures, vugs, dips, stratification and like features. An expanse of well wall is irradiated with highfrequency, coherent sound waves, and the interference pattern of the irradiating sonic energy and that returned from the wall expanse to a detection area is recorded to form an acoustic holograms at the detection area. By a combination of axial and rotary-scanning motions of the logging apparatus, a continuous hologram is obtained suitable for reconstruction to view as much as desired of the entire well-wall area.
Inventors
- 👤 Daniel Silverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:35
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/40; G01V1/44; G01V1/46; G03; G03H; G03H5/00; Y; Y10; Y10S; Y10S359/00; Y10S359/901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
Apparatus as in claim 1 including also means in said rotating part for producing an electrical signal of azimuth relative to the nonrotating part of said sonde.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |