US4694166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logging device having bimetallic insulating flask
Assignee: Halliburton Logging Services Inc
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Filing: 1985-05-28
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Granted: 1987-09-15
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Expires: 2005-05-28
Abstract
Abstract A logging device is disclosed for utilization in the detection of low energy photons. The logging device includes a sonde suitable for insertion into a wellbore. An insulating storage vessel is disposed within the sonde and serves to insulate a photon detection device and its associated electronic circuitry. The insulating storage vessel is constructed utilizing an inner and outer cylindrical shell. Each shell is constructed utilizing a low thermal conductive metallic material such as stainless steel or titanium and each shell includes at least a portion constructed utilizing a low density material having a high photon transmission property wherein low energy photons may be detected by the photon detection device within the insulating storage vessel. In a preferred embodiment of the present invention, an aperture is provided in the sonde which includes a plug of low density, low atomic number material wherein low energy photons may penetrate the sonde.
Inventors
- 👤 Dale A. Gearhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
A well logging device suitable for insertion into a wellbore comprising: a sonde suitable for insertion into a wellbore; an insulated bimetallic storage vessel disposed within said sonde, said insulated bimetallic storage vessel comprising an inner shell including a continuous imperforate cylindrical wall and a radially spaced apart outer shell including a continuous imperforate cylindrical wall, each of the said cylindrical walls being constructed of a first metallic material and having a portion thereof constructed of a low density second metallic material having high photon transmission properties; and a photon detector disposed within said inner shell and surrounded by said low density second metallic material wherein photons pass through said low density second metallic material of the walls of the inner and outer shells to said photon detector.
Claim 2
Dependent Claim
128 words
A well logging device suitable for insertion into a wellbore comprising: a sonde suitable for insertion into a wellbore; an insulated bimetallic storage vessel disposed within said sonde, said insulated bimetallic storage vessel comprising an inner shell including a continuous imperforate cylindrical wall and a radially spaced apart outer shell including a continuous imperforate cylindrical wall, each of the said cylindrical walls being constructed of a first metallic material and having a portion thereof constructed of a low density second metallic material having high photon transmission properties; and a photon detector disposed within said inner shell and surrounded by said low density second metallic material wherein photons pass through said low density second metallic material of the walls of the inner and outer shells to said photon detector.
Claim 3
Dependent Claim
19 words
The well logging device according to claim 1 wherein said sonde is constructed of a highly durable metallic material.
Claim 4
Dependent Claim
16 words
The well logging device according to claim 2 wherein said highly durable metallic material comprises tungsten.
Claim 5
Dependent Claim
38 words
The well logging device according to claim 2 wherein said sonde includes at least one aperture, said at least one aperture having a plug fitted therein, said plug comprising a low density material having high photon transmission properties.
Claim 6
Dependent Claim
38 words
The well logging device according to claim 4 wherein said aperture is disposed adjacent to said portion of said cylindrical wall of said outer shell constructed of said low density second metallic material having high photon transmission properties.
Claim 7
Dependent Claim
36 words
The well logging device according to claim 5 wherein said insulated bimetallic storage vessel includes means for sealing the volume between the cylindrical wall of said inner shell and the cylindrical wall of said outer shell.
Claim 8
Dependent Claim
29 words
The well logging device according to claim 6 wherein said volume between said cylindrical wall of said inner shell and said cylindrical wall of said outer wall is evacuated.
Claim 9
Dependent Claim
60 words
The well logging device according to claim 2 wherein said portion of said cylindrical wall of said outer shell constructed of said low density second metallic material having high photon transmission properties is aligned with and overlies said portion of said cylindrical wall of said inner shell constructed of said low density second metallic material having high photon transmission properties.
Claim 10
Dependent Claim
16 words
The well logging device according to claim 1 wherein said first metallic material comprises stainless steel.
Claim 11
Dependent Claim
15 words
The well logging device according to claim 1 wherein said first metallic material comprises titanium.
Claim 12
Dependent Claim
22 words
The well logging device according to claim 1 wherein said low density second metallic material having high photon transmission properties comprises beryllium.
Claim 13
Dependent Claim
21 words
The well logging device according to claim 1 wherein said photon detector comprises a scintillation crystal and an associated photo-multiplier tube.
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) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |