CN200956057Y - PuBe neutron source device for oil field logging - Google Patents
PuBe neutron source device for oil field logging Download PDFInfo
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- CN200956057Y CN200956057Y CN 200620012169 CN200620012169U CN200956057Y CN 200956057 Y CN200956057 Y CN 200956057Y CN 200620012169 CN200620012169 CN 200620012169 CN 200620012169 U CN200620012169 U CN 200620012169U CN 200956057 Y CN200956057 Y CN 200956057Y
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- neutron source
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- connecting rod
- source device
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Abstract
The utility model belongs to the area of technology which applies nucleus radiation to reconnoitering and exploring, and relates to a <238> Pu-Be neutron source device for oil field well logging, which includes a source shell(2) and an inner active region(1) arranged in the source shell. Where in, the neutron source in the active region (1) is<238> Pu-Be neutron source. The source shell(2) connects to one end of the connecting rod(3) by screw thread, the other end of the connecting rod(3) connects to the source head(5) with a screw thread hole by screw thread, the source head(5) connects to a probe pipe, and a airproof slot is arranged out of the connecting rod(3) cooperating with the instruments under the well through a airproof circle(4), which forms a anti-high-pressure airproof to increase the anti-pressure performance. The volume of the <238>Pu-Be neutron source is reduced enormously, thereby the anti-outside-force capability of the neutron source is increased.
Description
Technical field
The utility model belongs to the application nuclear radiation to be explored and the Detection Techniques field, is specifically related to a kind of oil reservoir logging neutron source device.
Background technology
Oil reservoir logging is to utilize the interaction of material in the rock and well around neutron and the drilling well, surveys the chemical element and the content of formation rock and space fluid thereof, provides foundation for seeking oil, coal, metal and nonmetallic minerals.The neutron penetration power is big, and neutron well logging can be at prime stratum around the exploratory boring under the drilling condition, and just not taking a sample, lithology, structural feature, composition, the mineral resources on energy express-analysis stratum distribute.
252Cf neutron source is well logging isotope neutron source commonly used.More greatly, promptly require light elements such as C, O under the big or measuring well of neutron penetration depth as hope exploration radius, then can adopt average energy is 5.0MeV's
241Am-Be neutron source.。
The neutron source device that uses is at present
241Am-Be neutron source device, this neutron source apparatus structure is simple, easy to use.But bear for a long time the down-hole up to the external pressure more than the 140Mpa after, the containment structure of this neutron source device easily deforms, even the phenomenon of breaking, and influences oil field operation.Particularly the exploitation along with the oil field enters the intermediary and later stages, in order to tap the potential energy, guarantees output, and the size of oil pipe reduces, and requires the neutron source device naturally under the prerequisite that guarantees crushing resistance, reduces the neutron source device size as far as possible.
Summary of the invention
The utility model provides the strong oil reservoir logging of a kind of anti-pressure ability neutron source device at the low defective of common neutron source device bearing capacity.
For solving the problems of the technologies described above, the utility model comprises pressure vessel, is located at active region in the pressure vessel, and wherein, the employed neutron source in active region is
238Pu-Be neutron source.Pressure vessel is connected with the threaded one end of connecting rod, and the other end of connecting rod is threaded with the source, has threaded hole on the source, links to each other with inserting tube, and the outside of connecting rod is provided with seal groove, cooperates by O-ring seal and subsurface equipment.
Because
238The specific activity of Pu is
241About 4.6 times of Am, therefore, relatively
241Am-Be neutron source, under the condition of same neutron yield,
238Pu-Be neutron source source core physical size can reduce greatly, thereby can increase the anti-external force ability of neutron source, and well logging neutron source can be used deeper in the petroleum prospecting of layer.Pressure vessel links to each other with the source by a connecting rod, and seal groove is set on connecting rod, cooperates by O-ring seal and subsurface equipment, forms a high voltage bearing sealing, has improved compressive property greatly.
Description of drawings
Fig. 1 is that oil reservoir logging is used among the embodiment 1
238The structural representation of Pu-Be neutron source device.
Fig. 2 is that oil reservoir logging is used among the embodiment 2
238The structural representation of Pu-Be neutron source device.
Among the figure, 1. active region; 2. pressure vessel; 3. connecting rod; 4. O-ring seal; 5. source; 6. threaded hole; 7. pneumatic shell.
Embodiment
As shown in Figure 1, a kind of oil reservoir logging is used
238Pu-Be neutron source device comprises pressure vessel 2, is located at active region 1 in the pressure vessel 2, and it is characterized in that: active region 1 employed neutron source is
238Pu-Be neutron source.Pressure vessel 2 is connected with the threaded one end of connecting rod 3, and the other end of connecting rod 3 is threaded with source 5, has threaded hole 6 on the source 5, links to each other with inserting tube, and the outside of connecting rod 3 is provided with seal groove, cooperates by O-ring seal 4 and subsurface equipment.
As shown in Figure 2, a kind of oil reservoir logging is used
238Pu-Be neutron source device comprises active region 1, pressure vessel 2, and active region 1 places in the pressure vessel 2, welded seal.Active region 1 employed neutron source is that activity is 4～28Ci
238Pu-Be neutron source.Be with a sealing pneumatic shell 7 outside pressure vessel 2, whole neutron source device can independently form a high pressure resistant system.
Claims (3)
1. an oil reservoir logging is used
238Pu-Be neutron source device comprises pressure vessel (2), is located at the interior active region of pressure vessel (2) (1), it is characterized in that: the employed neutron source in active region (1) is
238Pu-Be neutron source.
2. a kind of oil reservoir logging as claimed in claim 1 is used
238Pu-Be neutron source device, it is characterized in that: described pressure vessel (2) is connected with the threaded one end of connecting rod (3), the other end of connecting rod (3) is threaded with source (5), have threaded hole (6) on the source (5), link to each other with inserting tube, the outside of connecting rod (3) is provided with seal groove, cooperates by O-ring seal (4) and subsurface equipment.
3. a kind of oil reservoir logging as claimed in claim 1 is used
238Pu-Be neutron source device is characterized in that: be with a sealing pneumatic shell (7) outside the pressure vessel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620012169 CN200956057Y (en) | 2006-04-20 | 2006-04-20 | PuBe neutron source device for oil field logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620012169 CN200956057Y (en) | 2006-04-20 | 2006-04-20 | PuBe neutron source device for oil field logging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200956057Y true CN200956057Y (en) | 2007-10-03 |
Family
ID=38774644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620012169 Expired - Lifetime CN200956057Y (en) | 2006-04-20 | 2006-04-20 | PuBe neutron source device for oil field logging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200956057Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562058B (en) * | 2009-05-15 | 2011-08-17 | 北京树诚科技发展有限公司 | Preparation method of radioactive isotope neutron source |
| CN103366853A (en) * | 2013-07-15 | 2013-10-23 | 西北核技术研究所 | Generation device of controllable isotopic neutron source |
-
2006
- 2006-04-20 CN CN 200620012169 patent/CN200956057Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562058B (en) * | 2009-05-15 | 2011-08-17 | 北京树诚科技发展有限公司 | Preparation method of radioactive isotope neutron source |
| CN103366853A (en) * | 2013-07-15 | 2013-10-23 | 西北核技术研究所 | Generation device of controllable isotopic neutron source |
| CN103366853B (en) * | 2013-07-15 | 2016-04-13 | 西北核技术研究所 | A kind of generation device of controllable isotopic neutron source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071003 |
|
| EXPY | Termination of patent right or utility model |