CN2737943Y - Detector for low-energy gamma source fluid density well logging instrument - Google Patents
Detector for low-energy gamma source fluid density well logging instrument Download PDFInfo
- Publication number
- CN2737943Y CN2737943Y CNU2004200860989U CN200420086098U CN2737943Y CN 2737943 Y CN2737943 Y CN 2737943Y CN U2004200860989 U CNU2004200860989 U CN U2004200860989U CN 200420086098 U CN200420086098 U CN 200420086098U CN 2737943 Y CN2737943 Y CN 2737943Y
- Authority
- CN
- China
- Prior art keywords
- source
- window
- detector
- storehouse
- wall thickness
- 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 - Fee Related
Links
Images
Landscapes
- Measurement Of Radiation (AREA)
Abstract
The utility model relates to a detector for low-energy gamma source fluid density well logging instrument, which is provided with a tungsten-nickel-iron alloy source storehouse or a lead source storehouse at the left side inside a casing and an electron-multiplier tube at the right side inside the casing. The left side of the central part of the source storehouse is provided with a central hole while the right side of the central part of the source storehouse is provided with a conic collimation hole. The low-energy gamma source Am<241> is arranged in the central hole of the source storehouse. The right end-face of the source storehouse is provided with a left baffle provided with a source window and the right side of the left baffle is provided with a right baffle provided with a detector window. The source window and the detector window are titanium alloy, beryllium alloy or carbon fiber composite materials. A sample-taking channel is formed between the left baffle and the right baffle. The right end-face of the right baffle is provided with a grading ring provided with an aluminum pail of which the thickness is less than or equal to 2 mm at one side of the detector window having a box with the thickness range from 0.3 mm to 0.5 mm, the length range from 15 mm to 18 mm and the inner diameter range from 13 mm to 15 mm. The aluminum pail is provided with a detector crystal. The distance between the mid-point of the detector crystal and the mid-point of the radioactive source range from 140 mm to 160 mm.
Description
Technical field
The utility model belongs to by measuring the technical field of fluid density or densimetric analysis material, is specifically related to the sniffer of low energy gamma source FDT.
Background technology
The density of using radioactive source to measure fluid is a kind of conventional method that is used for measuring fluid density in the Petroleum Production well.The instrument that being used for of using at present measured oil well inner fluid density has the radioactive fluid densilog instrument, connects and constitutes by in the enclosure storehouse, source, gamma ray source, source window, detector window, detector crystal, shading ring, Aluminum Drum, photomultiplier is installed.When the fluid density that flows through sampling channel changes, the corresponding variation will take place in the gamma ray count rate that detector crystal obtains, and can obtain the fluid density in the sampling channel as calculated.
Above-mentioned radioactive fluid densilog instrument has adopted Cs
137Gamma radiation source, gamma energy are 661Kev, and the center in storehouse, source is processed with centre bore, and gamma source is placed in the centre bore in storehouse, source, and source window, detector window adopt the corrosion resistant plate material, and the lower curtate thickness of Aluminum Drum is 3mm.Because radially the space is little in the Petroleum Production well, the diameter of radioactive fluid densilog instrument all requires less than 38mm, in so little space with existing high density material to Cs
137Gamma radiation source and radioactive fluid densilog instrument are difficult to be shielded effectively, and surperficial radiopharmaceutical agent dose rate can have stronger irradiation to operating personnel and environment up to hundreds of mre/h, and poor stability does not meet national environmental standard.Do not obtain shielding at the ray of well internal cause in addition from radioactive source, radioactive source produces a large amount of scattered ray to the material around the probe, because of can not effectively shielding probe, its energy height receives garbage signal, become " noise " interference, the resolution ratio that fluid density is measured descends greatly, and the resolution ratio of profit density is reduced.
Summary of the invention
The shortcoming that technical problem to be solved in the utility model is to overcome above-mentioned radioactive fluid density log instrument provides a kind of sniffer of reasonable in design, simple in structure, result of use is good, radioactive pollution is little, resolution ratio is high low energy gamma source FDT for measuring the oil well fluid density.
Solving the problems of the technologies described above the technical scheme that is adopted is: the left side is provided with active storehouse in the enclosure, the right side is provided with photomultiplier, the storehouse, source is storehouse, tungsten nickel iron alloy source or lead source bin, left side, the center in storehouse, source is processed with centre bore, right side and is processed with the left end aperture greater than right-hand member aperture and the taper collimating aperture that links with the left end centre bore, and energy is the gamma source Am of 60Kev
241Be arranged on that left end is packaged with in the centre bore of screening cover in the storehouse, source, the left clapboard that active window is installed is set on the right side in storehouse, source, the source window is that wall thickness is the carbon fiber ring O compoiste material source window that the titanium alloy source window of 1.5～3mm or the beryllium alloy source window that wall thickness is 5～8mm or wall thickness are 3.5～6.5mm, the right clapboard that detector window is installed is set on the left clapboard right side, detector window is that wall thickness is the carbon fiber ring O compoiste material detector window that the titanium alloy detector window of 1.5～3mm or the beryllium alloy detector window that wall thickness is 5～8mm or wall thickness are 3.5～6.5mm, form sampling channel between left clapboard and the right clapboard, the shading ring of Aluminum Drum is installed in being provided with on the right side of right clapboard, Aluminum Drum is that the thickness of detector window one side is smaller or equal to 2mm, all the other thickness are 0.3～0.5mm, length is 15～18mm, internal diameter is the casing of 13～15mm, be provided with detector crystal in the Aluminum Drum, the detector crystal mid point is 140～160mm to the distance of radioactive source mid point.
Taper collimating aperture of the present utility model is that length is that the aperture of 15～30mm, radioactive source one side is that 12～15mm, tapering are 3 °～4.5 °.
It is the low energy gamma source Am of 60Kev that the utility model adopts ray energy
241, the center left in storehouse, source is processed with centre bore, the right side is processed with tapered collimating aperture, low energy gamma source Am
241Be placed in the center left centre bore in storehouse, source, tapered collimating aperture has reduced the absorption to the low energy gamma rays, the source window adopts titanium alloy source window or beryllium alloy source window or carbon fiber ring O compoiste material source window, detector window adopts titanium alloy detector window or beryllium alloy detector window or carbon fiber ring O compoiste material detector window, this provenance window and detector window, can reduce low energy gamma rays decay uptake, can bear the high pressure of down-hole again, make logging accuracy of the present utility model reach 0.03g/cc, resolution ratio reaches 0.01g/cc.The utlity model has reasonable in design, simple in structure, result of use is good, radioactive pollution is little, logging accuracy is high, the resolution ratio advantages of higher, can in oil well, be used to measure the density of fluids such as oil, suit in the little Petroleum Production well of radial space, to measure the density of fluid especially.
Description of drawings
Fig. 1 is a front view of the present utility model.
Fig. 2 is the sectional view of Fig. 1.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
In Fig. 1,2, the sniffer of the low energy gamma source FDT of present embodiment is to be connected by storehouse, source 1, radioactive source 2, source window 3, left clapboard 4, detector window 5, detector crystal 6, shading ring 7, photomultiplier 8, aluminum barrel bucket 9, right clapboard 10, screening cover 11, shell 12 to constitute.
Active storehouse 1 is installed in the left side in shell 12, the right side is equipped with photomultiplier 8, the storehouse, source 1 of present embodiment is storehouse, tungsten nickel iron alloy source, also can adopt lead source bin, storehouse, source 1 can be in shell 12 move left and right, left side, axial centre position in storehouse, source 1 is processed with centre bore, the right side is processed with taper collimating aperture a, taper collimating aperture a and centre bore link, and radioactive source 2 is installed in the centre bore in 1 left side, storehouse, source, and the radioactive source 2 of present embodiment is that energy is the gamma source Am of 60Kev
241, being the low energy radioactive source, the left end of radioactive source 2 is packaged with screening cover 11, and screening cover 11 is used to prevent the ray radiation left of radioactive source 2.The left end aperture of taper collimating aperture a is the convergent contour hole greater than the aperture of right-hand member, and the length of taper collimating aperture a is that the aperture of 20mm, radioactive source 2 one sides is that 14mm, tapering are 4 °, and tapered collimating aperture a has reduced the absorption to the low energy gamma rays.Radioactive source 2 is enclosed in the mobile source storehouse 1, because of the energy of radioactive source 2 low, diameter at shell 12 is under the situation of 26～38mm, as calculated with experimental result show around the shell 12 radiation dose rate much smaller than the national transportation vessel surface allow radiation dose rate 20 uncommon fertile/hour required standard.On 1 right side, storehouse, source with shell 12 left clapboard 4 that has been connected as a single entity, active window 3 is installed in the center of left clapboard 4, the source window 3 of present embodiment is that wall thickness is the titanium alloy source window of 2.5mm, also can adopt wall thickness is the beryllium alloy source window of 6.5mm, and also can adopt wall thickness is the carbon fiber ring O compoiste material source window of 4.5mm.The right clapboard 10 that is connected as a single entity with shell 12 is arranged on the right side of left clapboard 4, form sampling channel b between left clapboard 4 and the right clapboard 10, sampling channel b place shell 12 axially be processed with twice groove hole symmetrically, make the fluid in the oil well to enter in the sampling channel b, can adorn tested sample in the sample tube 4 from the groove hole.In the right side of right clapboard 10 detector window 5 is installed, the detector window 5 of present embodiment is that wall thickness is the titanium alloy detector window of 2.5mm, also can adopt wall thickness is the beryllium alloy detector window of 6.5mm, and also can adopt wall thickness is the carbon fiber ring O compoiste material detector window of 4.5mm.The utility model adopts this provenance window and detector window, can reduce low energy gamma rays decay uptake, can bear the high pressure of down-hole again, makes logging accuracy of the present utility model reach 0.03g/cc, and resolution ratio reaches 0.01g/cc.Shading ring 7 is installed on the right side of detector window 5, the thickness that detector window 5 one sides of Aluminum Drum 9 are installed in the shading ring 7 is 2mm, all the other thickness are 0.4mm, length is 16mm, internal diameter is the round casing of 14mm, detector crystal 6 is installed in the Aluminum Drum 9, detector crystal 6 mid points are 150mm to the distance of radioactive source 2 mid points, the low energy gamma ray that detector crystal 6 is used for receiving through behind the attenuating fluid converts optical signal to, the detector crystal 6 of present embodiment is the sodium iodide scintillation crystal, detector crystal 6 is encapsulated in one and surveys in the end face Aluminum Drum 9 as thin as a wafer, makes the low energy gamma rays that arrives detector crystal 6 obtain the most effective detection.
Embodiment 2
In the present embodiment, the length of taper collimating aperture a is that the aperture of 15mm, radioactive source 2 one sides is that 12mm, tapering are 3 °.Source window 3 is that wall thickness is the titanium alloy source window of 1.5mm, also can adopt wall thickness is the beryllium alloy source window of 5mm, also can adopt wall thickness is the carbon fiber ring O compoiste material source window of 3.5mm, detector window 5 is that wall thickness is the titanium alloy detector window of 1.5mm, can adopt wall thickness is the beryllium alloy detector window of 5mm, and also can adopt wall thickness is the carbon fiber ring O compoiste material detector window of 3.5mm.The thickness of detector window 5 one sides of Aluminum Drum 9 is that 2mm, all the other thickness are that 0.3mm, length are that 15mm, internal diameter are the round casing of 13mm.Detector crystal 6 mid points are 140mm to the distance of radioactive source 2 mid points.The connecting relation of other component and component is identical with embodiment 1.
Embodiment 3
In the present embodiment, the length of taper collimating aperture a is that the aperture of 30mm, radioactive source 2 one sides is that 15mm, tapering are 4.5 °.Source window 3 is that wall thickness is the titanium alloy source window of 3mm, also can adopt wall thickness is the beryllium alloy source window of 8mm, also can adopt wall thickness is the carbon fiber ring O compoiste material source window of 6mm, detector window 5 is that wall thickness is the titanium alloy detector window of 3mm, can adopt wall thickness is the beryllium alloy detector window of 8mm, and also can adopt wall thickness is the carbon fiber ring O compoiste material detector window of 6mm.The thickness of detector window 5 one sides of Aluminum Drum 9 is that 2mm, all the other thickness are that 0.5mm, length are that 18mm, internal diameter are the round casing of 15mm.Detector crystal 6 mid points are 160mm to the distance of radioactive source 2 mid points.The connecting relation of other component and component is identical with embodiment 1.
Operating principle of the present utility model is as follows:
Energy in the storehouse, source 1 is the gamma source Am of 60Kev
241Emitted low energy gamma ray through taper collimating aperture a to sampling channel b, shine the downhole fluid that enters in the sampling channel b, the low energy gamma ray is pressed the index law decay, low energy gamma-ray irradiation after the decay is to detector crystal 6, convert optical signal to through detector crystal 6, photomultiplier 8 converts the optical signal of received detector crystal 6 to the signal of telecommunication and outputs to data handling system and carry out data and handle, and calculates the density of fluid.
Claims (2)
1, a kind of sniffer of low energy gamma source FDT, the left side is provided with active storehouse [1] in shell [11], the right side is provided with photomultiplier [8], axial centre position at Yuan Cang [1] is processed with centre bore, radioactive source [2] is arranged on the interior left end in storehouse, source [1] and is packaged with in the centre bore of screening cover [11], the left clapboard [4] that active window [3] is installed is set on the right side of Yuan Cang [1], the right clapboard [10] that detector window [5] are installed is set on left clapboard [4] right side, form sampling channel [b] between left clapboard [4] and the right clapboard [10], the shading ring [7] of Aluminum Drum [9] is installed in being provided with on the right side of right clapboard [10], be provided with detector crystal [6] in the Aluminum Drum [9], it is characterized in that: storehouse, said source [1] is storehouse, tungsten nickel iron alloy source or lead source bin, left side, the center in storehouse, source [1] is processed with centre bore, and the right side is processed with the left end aperture greater than right-hand member aperture and the taper collimating aperture [a] that links with the left end centre bore; Said radioactive source [2] is that energy is the gamma source Am of 60Kev
241, be arranged in the centre bore in 1 left side, storehouse, source; Said source window [3] is that wall thickness is the carbon fiber ring O compoiste material source window that the titanium alloy source window of 1.5～3mm or the beryllium alloy source window that wall thickness is 5～8mm or wall thickness are 3.5～6.5mm; Said detector window [5] is that wall thickness is the carbon fiber ring O compoiste material detector window that the titanium alloy detector window of 1.5～3mm or the beryllium alloy detector window that wall thickness is 5～8mm or wall thickness are 3.5～6.5mm; Said Aluminum Drum [9] is that the thickness of detector window [5] one sides is that 0.3～0.5mm, length are that 15～18mm, internal diameter are the casing of 13～15mm smaller or equal to 2mm, all the other thickness; Said detector crystal [6] mid point is 140～160mm to the distance of radioactive source [2] mid point.
2, according to the sniffer of the described low energy gamma source of claim 1 FDT, it is characterized in that: said taper collimating aperture [a] is that length is that the aperture of 15～30mm, radioactive source [2] one sides is that 12～15mm, tapering are 3 °～4.5 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200860989U CN2737943Y (en) | 2004-10-26 | 2004-10-26 | Detector for low-energy gamma source fluid density well logging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200860989U CN2737943Y (en) | 2004-10-26 | 2004-10-26 | Detector for low-energy gamma source fluid density well logging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2737943Y true CN2737943Y (en) | 2005-11-02 |
Family
ID=35347853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200860989U Expired - Fee Related CN2737943Y (en) | 2004-10-26 | 2004-10-26 | Detector for low-energy gamma source fluid density well logging instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2737943Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061911A (en) * | 2010-12-13 | 2011-05-18 | 中国石油集团川庆钻探工程有限公司 | Method for measuring wall thickness of downhole casing |
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN106121628A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Improved 2228 lithologic density logging instrument with exemption source |
| CN111285052A (en) * | 2020-03-16 | 2020-06-16 | 河北金波嘉源测控技术有限公司 | Belt material flow control system |
-
2004
- 2004-10-26 CN CNU2004200860989U patent/CN2737943Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061911A (en) * | 2010-12-13 | 2011-05-18 | 中国石油集团川庆钻探工程有限公司 | Method for measuring wall thickness of downhole casing |
| CN102061911B (en) * | 2010-12-13 | 2013-06-26 | 中国石油集团川庆钻探工程有限公司 | Method for measuring wall thickness of downhole casing |
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN102953689B (en) * | 2011-08-30 | 2014-12-10 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN106121628A (en) * | 2016-08-29 | 2016-11-16 | 中国石油集团渤海钻探工程有限公司 | Improved 2228 lithologic density logging instrument with exemption source |
| CN111285052A (en) * | 2020-03-16 | 2020-06-16 | 河北金波嘉源测控技术有限公司 | Belt material flow control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7285772B2 (en) | Logging tool with a parasitic radiation shield and method of logging with such a tool | |
| CN101183065B (en) | Density measurement with gamma backscattering | |
| US7507952B2 (en) | Apparatus and method for fluid density determination | |
| CN101349661B (en) | Method for on-line detecting coal ashes on belt | |
| JP5579615B2 (en) | Apparatus for detecting radiation and method for detecting radiation | |
| US5120963A (en) | Radiation detector assembly for formation logging apparatus | |
| GB2180065A (en) | Multi-component flow measurement and imaging | |
| NO20131499A1 (en) | Apparatus and method for detecting radiation comprising neutrons and gamma rays | |
| CN108152846A (en) | A kind of digitalization radiation inert gas133Xe activity coincidence measurement devices | |
| CN101937090A (en) | High-sensitivity wide-range X-gamma ambient dose equivalent rate monitor probe | |
| CA2506133C (en) | Logging tool with a parasitic radiation shield and method of logging with such a tool | |
| MXPA06001995A (en) | Shielded pads for detecting subsurface radiation phenomena. | |
| US20180292566A1 (en) | Radiation source device having fluorescent material for secondary photon generation | |
| CN103245680A (en) | Fast neutron imaging method and system based on time-of-flight method | |
| CN2737943Y (en) | Detector for low-energy gamma source fluid density well logging instrument | |
| CN209838398U (en) | Orientation and density measuring device while drilling | |
| WO1997033141A1 (en) | Compton backscatter pipe wall thickness gauge employing focusing collimator and annular detector | |
| CN201896608U (en) | Environment-friendly fluid density logging instrument | |
| US20210325320A1 (en) | Device and method for measuring total cross-sectional phase fraction of multiphase flow based on ray coincidence measurement | |
| Reguigui | Gamma ray spectrometry | |
| CN212985203U (en) | Novel four detector array density logging instrument | |
| An et al. | Geometrical influence on Hg determination in wet sediment using K‐shell fluorescence analysis | |
| CN214787344U (en) | Protective structure for crystal measurement window of while-drilling detector | |
| Hennig et al. | Digital pulse shape analysis with phoswich detectors to simplify coincidence measurements of radioactive xenon | |
| CN111663939B (en) | Direction density measurement while drilling device and measurement method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XI AN CHOUCHUANG TEST PROJECT TECHNOLOGY INSTITUT Free format text: FORMER OWNER: SHOUCHUANG SCIENCE + TECHNOLOGY ENGINEERING CO., LTD., XIAN Effective date: 20060512 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060512 Address after: 710075 B115, building five, building two, hi tech Road, Shaanxi, Xi'an, China Patentee after: Xi'an first test Engineering Technology Research Institute Address before: 710061 Shaanxi province Xi'an Cuihua Road No. 89 Patentee before: Shouchuang Science & Technology Engineering Co., Ltd., Xian |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |