GB723005A - Improvements relating to the geophysical logging of boreholes - Google Patents
Improvements relating to the geophysical logging of boreholesInfo
- Publication number
- GB723005A GB723005A GB2810851A GB2810851A GB723005A GB 723005 A GB723005 A GB 723005A GB 2810851 A GB2810851 A GB 2810851A GB 2810851 A GB2810851 A GB 2810851A GB 723005 A GB723005 A GB 723005A
- Authority
- GB
- United Kingdom
- Prior art keywords
- neutrons
- source
- lead
- boreholes
- slow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- 229910052790 beryllium Inorganic materials 0.000 abstract 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 239000003245 coal Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000002775 capsule Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 229910052699 polonium Inorganic materials 0.000 abstract 1
- HZEBHPIOVYHPMT-UHFFFAOYSA-N polonium atom Chemical compound [Po] HZEBHPIOVYHPMT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052705 radium Inorganic materials 0.000 abstract 1
- HCWPIIXVSYCSAN-UHFFFAOYSA-N radium atom Chemical compound [Ra] HCWPIIXVSYCSAN-UHFFFAOYSA-N 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
- G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
- G01V5/10—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
- G01V5/107—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting reflected or back-scattered neutrons
Landscapes
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
723,005. Logging boreholes by means of neutrons. COAL INDUSTRY (PATENTS), Ltd. March 2, 1953 [Nov. 30, 1951], No. 28108/51. Class 40 (3). Apparatus for examining the material surrounding boreholes comprises a source of fast neutrons and a detector of slow or thermal neutrons arranged in leading or trailing relation to each other in a borehole. A significant increase in the number of slow neutrons indicates the presence of carbon in the surrounding rock. As shown, a fast neutron source 2 which may be a capsule containing a mixture of radium and beryllium and of polonium and beryllium is mounted in a tubular shell 1 of material, e.g. aluminium or magnesium which permits the passage of fast neutrons. Above and below the neutron source and inside the shell are arranged plugs of lead 4 which shield the ionization chambers 3, 3, arranged on opposite sides of the source, from direct α-radiation from the neutron source. Other a-rays are prevented from reaching the detectors by lead screens 5 which surround them. Pure carbon packings 6 between the lead and the detectors acts as a conductor for slow neutrons diffusing into the instrument from the coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2810851A GB723005A (en) | 1951-11-30 | 1951-11-30 | Improvements relating to the geophysical logging of boreholes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2810851A GB723005A (en) | 1951-11-30 | 1951-11-30 | Improvements relating to the geophysical logging of boreholes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB723005A true GB723005A (en) | 1955-02-02 |
Family
ID=10270396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2810851A Expired GB723005A (en) | 1951-11-30 | 1951-11-30 | Improvements relating to the geophysical logging of boreholes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB723005A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798786A (en) * | 2018-07-17 | 2018-11-13 | 中国矿业大学(北京) | A kind of neutron radiation monitoring method for early warning of underground coal Instability of Rock Body dynamic disaster |
-
1951
- 1951-11-30 GB GB2810851A patent/GB723005A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798786A (en) * | 2018-07-17 | 2018-11-13 | 中国矿业大学(北京) | A kind of neutron radiation monitoring method for early warning of underground coal Instability of Rock Body dynamic disaster |
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