US4517459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature stabilization system for a radiation detector in a well logging tool
Assignee: Texaco Inc
•
Filing: 1981-11-02
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Granted: 1985-05-14
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Expires: 2001-11-02
Abstract
Abstract A temperature stabilization system for a radiation detector in a well logging tool includes a temperature sensor which senses the temperature and provides a corresponding signal. Apparatus located within the logging tool and containing the radiation detector provides a controllable temperature environment for the radiation detector. A heat exchanger transfers heat from the apparatus in accordance with the temperature signal so as to stabilize the temperature in the apparatus for the radiation detector. A heat disposing device is arranged with the heat exchanger to dispose of the transferred heat.
Inventors
- 👤 Albert P. Richter, Jr.
- 👤 Harold E. Peelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:30
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/01; E21B47/017; E21B47/0175; E21B36/00; E21B36/001; G; G01; G01V; G01V5/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A temperature stabilization system for a radiation detector in a well logging tool comprising means for sensing the temperature in a well logging tool and providing a corresponding temperature signal, means located within said logging tool and containing the radiation detector tool for providing a controllable temperature environment for the radiation detector, means responsive to the temperature signal for transferring heat from the environment means so as to stabilize the temperature in the environment means for the radiation detector, and means for disposing of transferred heat from the heat transfer means
Claim 2
Dependent Claim
91 words
A temperature stabilization system for a radiation detector in a well logging tool comprising means for sensing the temperature in a well logging tool and providing a corresponding temperature signal, means located within said logging tool and containing the radiation detector tool for providing a controllable temperature environment for the radiation detector, means responsive to the temperature signal for transferring heat from the environment means so as to stabilize the temperature in the environment means for the radiation detector, and means for disposing of transferred heat from the heat transfer means
Claim 3
Dependent Claim
48 words
The system as described in claim 1 in which the environment means includes a vacuum bottle which houses the radiation detector, and a heat pipe arranged to cooperate with the vacuum bottle so that the ambient heat around the radiation detector is provided to the heat transfer means.
Claim 4
Dependent Claim
19 words
The system as described in claim 2 in which the heat disposing means radiates transferred heat into the borehole.
Claim 5
Dependent Claim
34 words
A system as described in claim 1 in which the environment means is a vacuum bottle in which the radiation detector is located, and the heat disposing means is located within the vacuum bottle.
Claim 6
Dependent Claim
34 words
A system as described in claim 4 in which the heat disposing means includes a cannister arranged with the heat transfer means, and phase change material within the cannister which absorbs the transferred heat.
Claim 7
Dependent Claim
26 words
A system as described in claim 5 in which the phase change material is preferably a material that changes phase at a temperature above room temperature.
Claim 8
Dependent Claim
17 words
A system as described in claim 6 in which phase change material is sodium hydrogen phosphate dodecahydrate.
Claim 9
Dependent Claim
53 words
A system as described in claim 3 or 5 in which the heat transfer means includes means for providing a control signal in accordance with the temperature signal, and a thermal electric cooler is arranged between the environment means and the heat disposing means which transfers heat in accordance with the control signal.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |