CN2648456Y - Probe of natural gamma well detector - Google Patents
Probe of natural gamma well detector Download PDFInfo
- Publication number
- CN2648456Y CN2648456Y CN 03218726 CN03218726U CN2648456Y CN 2648456 Y CN2648456 Y CN 2648456Y CN 03218726 CN03218726 CN 03218726 CN 03218726 U CN03218726 U CN 03218726U CN 2648456 Y CN2648456 Y CN 2648456Y
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- CN
- China
- Prior art keywords
- probe
- photomultiplier
- crystal
- scintillation crystal
- well detector
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Abstract
The utility model relates to a probe of a gamma well detector, particularly a probe of a natural gamma well detector for measuring gamma rays which are generated by stratum natural radioactive substances. The probe of a natural gamma well detector is composed of scintillation crystals and photomultiplier pipes, and has the characterized in that two to six groups of scintillation crystals and photomultiplier pipes are connected to a same rod-shaped casing by the probe with mutual intervals and in series, and each group of scintillation crystals and photomultiplier pipes has connected one of the scintillation crystals and one of the photomultiplier pipes. The diameter of each probe crystal is selected from 14 to 70 mm, and the length of each probe crystal is selected from 50 to 250 mm, and moreover, the diameter of each probe crystal is selected from 36 to 50 mm, and the length of each probe crystal is selected from 80 to 150 mm. The probe of a natural gamma well detector has high measuring precision, increases counting rates, reduces statistical fluctuation and improves stratum resolution rate.
Description
Technical field: the utility model is the probe of gamma ray logger, particularly about a kind of probe that is used for measuring the instrument of stratum natural gamma rays that radiomaterial produces.
Background technology: different stratum radiomaterial differences, utilize the radiomaterial in the stratum can divide the stratum.Radiomaterial is fewer in the normal stratum, the gamma rays statistic fluctuation that radiomaterial is emitted is bigger again, if survey the gamma intensity in the accurate stratum, has only the crystal overstriking lengthening with the gamma detecting head, but the crystal of overstriking gamma detector, be subjected to the size impact of instrument probe, certain limitation is arranged, only add long crystal, lengthening is subjected to the influence of crystal processing again, can not be oversize, the long self-absorption of crystal also is affected, and present crystal is the longest to be 30cm.
Summary of the invention: the purpose of this utility model provides a kind of probe of instrument, and its measuring accuracy height has increased counting rate and reduced statistic fluctuation, has improved stratigraphic resolution.
The technical solution of the utility model is: design a kind of probe of instrument, it comprises scintillation crystal and photomultiplier composition, it is characterized in that: probe space in same bar-shaped housing is serially connected with 2-6 group scintillation crystal and photomultiplier.
Every group of scintillation crystal has a scintillation crystal to be connected with a photomultiplier with photomultiplier.
Described probe crystal diameter is chosen in 14-70mm, and length is chosen in 50--250mm.
Described probe crystal diameter is chosen in 36-50mm, and total length is chosen in 80--150mm.
The housing outside of described probe photomultiplier is covered with shield, and the probe two ends also are covered with shield.
The space is serially connected with 3-4 group scintillation crystal and photomultiplier in the bar-shaped housing of described probe.
Described scintillation crystal is sodium iodide NaI.
Described scintillation crystal is bismuth germanium oxide BGO.
Characteristics of the present utility model are:
Because the probe of the instrument of the utility model design, it will an original probe changes to pop one's head in to be connected in series by 2-6 and constitutes, and single crystal shortens, and has improved stratigraphic resolution, and originally stratigraphic resolution is 100cm, can reach 30cm now.And adopt 2-6 the gamma rays in the probe series connection detection stratum, and increase counting rate, reduce statistic fluctuation, because of single probe crystal is little, but increased the probe length overall, the crystal length overall surpasses or equals original 30cm, kept gross-count rate constant, counting rate is the addition number of 2-6 probe.The probe outside adds screen layer, shields non-collimation ray.
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
Description of drawings: accompanying drawing 1 is embodiment 1 a sonde configuration synoptic diagram.
Accompanying drawing 2 is embodiment 2 sonde configuration synoptic diagram.
Accompanying drawing 3 is electrical schematic diagrams of embodiment 1.
Accompanying drawing 4 is embodiment 1 preamplifier circuit figure.
Accompanying drawing 5 is the circuit diagrams that adopt the PIC16C73B single-chip microcomputer among the embodiment 1.
Accompanying drawing 6 is embodiment 1 photomultiplier partial circuit figure.
Among the figure: 1, radome; 2, scintillation crystal; 3, photomultiplier; 4, prime amplifier; 5, shield; 6, scintillation crystal; 7, photomultiplier; 8, prime amplifier; 9, shield; 10, scintillation crystal; 11, photomultiplier; 12, prime amplifier; 13, main amplifier; 14, main amplifier; 15, main amplifier; 16, amplitude differentiation device; 17, amplitude differentiation device; 18, amplitude differentiation device; 19, down-hole microcontroller; 20, the spread of the rumours driver; 21, down-hole power transducer; 22, low pressure voltage stabilizing power supply; 23, high voltage stabilizing power supply.
Embodiment:
Fig. 1 is embodiment 1 a sonde configuration synoptic diagram: this structure is suitable for the outer sonde configuration that adopts through the probe for the instrument of φ 70-φ 102mm: it is by (1) three probe of two radomes space in same bar-shaped housing formation that is serially connected, each NaI scintillation crystal and photomultiplier are combined into one group, and scintillation crystal (2) and photomultiplier (3) outside are covered with radome (1); Scintillation crystal (6) and photomultiplier (7) outside are covered with shield (5); Scintillation crystal (10) and photomultiplier (11) outside are covered with shield (9) and are combined into one group, the non-collimation ray of maskable.
Fig. 2 is embodiment 2 sonde configuration synoptic diagram: it is suitable for the probe crystal diameter of instrument below φ 70mm, the sonde configuration that adopts, it also is to be serially connected by three probes space in same bar-shaped housing to constitute, each NaI scintillation crystal and photomultiplier are combined into one group, and scintillation crystal (2) is formed one group with photomultiplier (3); Scintillation crystal (6) is formed one group with photomultiplier (7); Scintillation crystal (10) is formed one group with photomultiplier (11); But because the restriction of outside dimension does not have shield in the photomultiplier transit tube outside of probe, the probe two ends do not have shield yet.
Fig. 3 is embodiment 1 measuring instrument circuit theory diagrams: it has radome (1) in the probe outside, shield non-collimation ray, scintillation crystal (2) and photomultiplier (3) and form first gamma probe, it converts gamma rays to electric signal, the gamma signal enters main amplifier (13) through prime amplifier (4) (follower), by amplitude differentiation device (16) differentiation, enter down-hole microcontroller (19) coding then, deliver on the cable through the spread of the rumours driver (20) behind the coding.Shield (5), scintillation crystal (6), and photomultiplier (7) form second gamma probe, produce the second road gamma signal, enter amplitude differentiation device (17) through prime amplifier (8) and main amplifier (14), arrive down-hole microcontroller (19) then, back process and first gamma probe are just the same.Shield (9), scintillation crystal (10), photomultiplier (11) are formed the 3rd gamma probe, produce Third Road gamma signal, the gamma signal that it produces is through prime amplifier (12) and main amplifier (15) and amplitude differentiation device (18), enter down-hole microcontroller (19), later transmission course and first gamma probe are just the same.Down-hole power transducer (21) is that the power conversion of going into the well is become the high and low pressure power supply, and low pressure voltage stabilizing power supply (22) provides low-tension supply and uses for each amplifier and microcontroller.High voltage stabilizing power supply (23) provides high pressure and uses to photomultiplier.
Every group of NaI crystal and photomultiplier detect gamma rays and convert light signal to, these signals are gone into single-chip microcomputer through the amplification shaping and are made up, become graceful sign indicating number deliver to ground again through ground decoding send into PC, PC shows four logging traces, article three, be three gamma curves that probe receives separately, one is three probe build-up curves.
Fig. 4 is Fig. 3 preamplifier circuit figure, and its prime amplifier has PNP triode (Q400, Q1, Q2) 2N2907 and resistance-capacitance network to constitute.Purpose is the driving force of enhancing signal, and its input signal is the output signal of photomultiplier, and output signal is delivered to the main amplifier input.In each probe a prime amplifier is arranged all; Main amplifier among Fig. 4 adds the resistance-capacitance network formation by double operational (U400, U1, U2) OP262 one group (U400A, U1A, U2A), another group amplifier of OP262 is delivered in its output, and ((U400AB, U1B, U2B) and threshold compare, relatively the signal of Chan Shenging counter input end or the interruption of delivering to U200 among single-chip microcomputer such as Fig. 5 counts, and three such amplifiers and comparer are arranged in this example.
Fig. 5 is the circuit diagram that adopts the PIC16C73B single-chip microcomputer among Fig. 3, and it carries out timer counter with timer (pin RA4), (pin RC1) and external interrupt (pin RB0), and sends graceful sign indicating number.The graceful sign indicating number (pin RB2, pin RB4) that single-chip microcomputer sends is delivered on the cable through amplifier (LM118) driver (by pipe NPN, PNP are constituted).
Fig. 6 is that the required high-voltage power supply of photomultiplier shown in Figure 3 is boosted by self-excitation transformer and produced through voltage multiplying rectifier.Low-tension supply produces 5V and two series connection formation of 12V stabilivolt 12V and 24V by the 5V stabilivolt as shown in Figure 5, and wherein 12V does to use floatingly.
Claims (8)
1, the probe of instrument, it comprises scintillation crystal and photomultiplier composition, it is characterized in that: probe space in same bar-shaped housing is serially connected with 2-6 group scintillation crystal and photomultiplier.
2, the probe of instrument according to claim 1 is characterized in that: every group of scintillation crystal has a scintillation crystal to be connected with a photomultiplier with photomultiplier.
3, the probe of instrument according to claim 1 is characterized in that: described probe crystal diameter is chosen in 14-70mm, and length is chosen in 50-250mm.
4, the probe of instrument according to claim 1 is characterized in that: described probe crystal diameter is chosen in 36-50mm, and total length is chosen in 80-150mm.
5, the probe of instrument according to claim 1 is characterized in that: the housing outside of described probe photomultiplier is covered with shield, and the probe two ends also are covered with shield.
6, the probe of instrument according to claim 1 is characterized in that: the space is serially connected with 3-4 group scintillation crystal and photomultiplier in the bar-shaped housing of described probe.
7, the probe of instrument according to claim 1 is characterized in that: described scintillation crystal is sodium iodide NaI.
8, the probe of instrument according to claim 1 is characterized in that: described scintillation crystal is bismuth germanium oxide BGO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218726 CN2648456Y (en) | 2003-04-06 | 2003-04-06 | Probe of natural gamma well detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218726 CN2648456Y (en) | 2003-04-06 | 2003-04-06 | Probe of natural gamma well detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2648456Y true CN2648456Y (en) | 2004-10-13 |
Family
ID=34325849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218726 Expired - Fee Related CN2648456Y (en) | 2003-04-06 | 2003-04-06 | Probe of natural gamma well detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2648456Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666226A (en) * | 2008-09-01 | 2010-03-10 | 天津大港油田圣达科技有限公司 | Probe sleeve with shock-proof and anti-collision performance |
| CN102094628A (en) * | 2011-03-22 | 2011-06-15 | 东华理工大学 | LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument |
| CN102183778A (en) * | 2011-05-04 | 2011-09-14 | 深圳市贝斯达医疗器械有限公司 | Flashing probe |
| CN105863606A (en) * | 2015-01-19 | 2016-08-17 | 中国石油集团长城钻探工程有限公司 | Natural gamma-ray logging pup joint |
| WO2018223769A1 (en) * | 2017-06-05 | 2018-12-13 | 中国科学院上海硅酸盐研究所 | Yttrium-doped barium fluoride crystal and preparation method and use thereof |
-
2003
- 2003-04-06 CN CN 03218726 patent/CN2648456Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666226A (en) * | 2008-09-01 | 2010-03-10 | 天津大港油田圣达科技有限公司 | Probe sleeve with shock-proof and anti-collision performance |
| CN102094628A (en) * | 2011-03-22 | 2011-06-15 | 东华理工大学 | LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument |
| CN102094628B (en) * | 2011-03-22 | 2014-01-08 | 东华理工大学 | LaBr3(Ce) crystal-based multi-channel gamma energy spectrum logging instrument |
| CN102183778A (en) * | 2011-05-04 | 2011-09-14 | 深圳市贝斯达医疗器械有限公司 | Flashing probe |
| CN105863606A (en) * | 2015-01-19 | 2016-08-17 | 中国石油集团长城钻探工程有限公司 | Natural gamma-ray logging pup joint |
| WO2018223769A1 (en) * | 2017-06-05 | 2018-12-13 | 中国科学院上海硅酸盐研究所 | Yttrium-doped barium fluoride crystal and preparation method and use thereof |
| US11142689B2 (en) | 2017-06-05 | 2021-10-12 | Shanghai Institute Of Ceramics, Chinese Academy Of Sciences | Yttrium-doped barium fluoride crystal and preparation method and use thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |