US3583219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bore hole logging
Assignee: Adair Co
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Filing: 1969-08-22
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Granted: 1971-06-08
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Expires: 1989-08-22
Abstract
Abstract A method of locating anomalies in a well bore containing a liquid by moving a drill string carrying a drill bit through the borehole. A sound detector and recorder are positioned within the drill string adjacent the bit. Movement of the drill bit through the liquid agitates the liquid to cause sound pressure variations which are picked up by the sound detector and recorded.
Inventors
- 👤 Klaus Lunstroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:59
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/003; E21B47/08; E21B47/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A method for locating a cavity traversed by a well bore containing a liquid, which comprises positioning a sound detector and a recorder therefor in a drill string carrying a drill bit in the well bore, said sound detector being adjacent said drill bit, moving the drill bit and the sound detector vertically through the liquid in the well bore and past the cavity, whereby the movement of the drill bit agitates the liquid to cause sound pressure variations, and operating said sound detector and recorder to record said sound pressure variations during such vertical movement, including any anomaly in said sound pressure variations which is caused by passing the cavity.
Claim 2
Independent Claim
111 words
A method for locating a cavity traversed by a well bore containing a liquid, which comprises positioning a sound detector and a recorder therefor in a drill string carrying a drill bit in the well bore, said sound detector being adjacent said drill bit, moving the drill bit and the sound detector vertically through the liquid in the well bore and past the cavity, whereby the movement of the drill bit agitates the liquid to cause sound pressure variations, and operating said sound detector and recorder to record said sound pressure variations during such vertical movement, including any anomaly in said sound pressure variations which is caused by passing the cavity.
References Cited (Backward Citations)
US2650067A
Cited
US3291219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |