CN104265275A - Coal mine underground direction while drilling gama logging instrument and measuring method thereof - Google Patents
Coal mine underground direction while drilling gama logging instrument and measuring method thereof Download PDFInfo
- Publication number
- CN104265275A CN104265275A CN201410480757.5A CN201410480757A CN104265275A CN 104265275 A CN104265275 A CN 104265275A CN 201410480757 A CN201410480757 A CN 201410480757A CN 104265275 A CN104265275 A CN 104265275A
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- Prior art keywords
- circuit
- gama
- logging instrument
- counting
- sensor
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 title abstract description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 claims description 30
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 10
- 235000009518 sodium iodide Nutrition 0.000 claims description 10
- 229910052716 thallium Inorganic materials 0.000 claims description 9
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 claims description 9
- 229910018095 Ni-MH Inorganic materials 0.000 claims description 7
- 229910018477 Ni—MH Inorganic materials 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 6
- 238000012546 transfer Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract 1
- 230000005251 gamma ray Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a coal mine underground direction while drilling gama logging instrument and a measuring method thereof. A natural gama measuring technology with directionality is adopted, two direction natural gama sensors which are installed in the way that an angle of 180 degrees is formed between the two sensors are adopted, the natural gama sensors are utilized to receive gama rays from the specific direction of a stratum and convert the rays into two groups of voltage pulses, the voltage pulses pass through a two-stage amplifying circuit, an identification circuit and a pulse shaping circuit to be transmitted into a single chip microcomputer to be counted respectively, counted values are converted into direction gama metering values with cps as the unit finally and can provide a basis for judgment of the distance between drilled holes, a coal bed top plate and a coal bed base plate and lithology division. The instrument comprises a power circuit module, a sensor, a signal extraction circuit and a metering circuit. The power circuit module is connected with the sensor, the signal extraction circuit and the metering circuit. The sensor is connected with the signal extraction circuit, and the signal extraction circuit is connected with the metering circuit.
Description
One, technical field:
The present invention relates to underground coal mine with brill azimuth gamma well-logging technology, be specifically related to a kind of underground coal mine with brill azimuth gamma well-logging instrument and measuring method thereof, also can match with other logger for the measurement of interior formation information of holing.
Two, background technology:
For coal mining, finding out coal resources occurrence status and fine geology structure in advance, is the prerequisite realizing colliery highly effective and safe exploitation.For coalbed methane ground extraction, down-hole extraction with aboveground under combine the modes such as extraction, need to find out its extraction geological conditions in advance, thus instruct the design and construction of coal bed gas extraction borehole.Logging technique is that detecting of down-hole geological conditions provides technical support, and involved in the present invention is mainly used to the activity measuring gamma ray in stratum, for judging distance and the lithology classification of hole spacing Seam Roof And Floor with brill azimuth gamma well-logging.
Three, summary of the invention:
The present invention is in order to solve the weak point in above-mentioned background technology, there is provided a kind of underground coal mine with brill azimuth gamma well-logging instrument and measuring method thereof, this instrument adopts the directive natural gamma logging technology of band, is characterized in by adopting two to be mutually 180 ° of orientation natural gamma sensors installed.Natural gamma sensor is utilized to receive stratum certain party gamma ray always and be converted into two groups of voltage pulses, after two-stage amplifying circuit, discriminator circuit and pulse shaper, send into single-chip microcomputer to count respectively two groups of voltage pulses, this count value is finally scaled the orientation Gama Count value in units of cps, can be and judges that the distance of hole spacing Seam Roof And Floor and lithology classification provide foundation.
For achieving the above object, the technical solution used in the present invention is: a kind of underground coal mine, with brill azimuth gamma well-logging instrument, is characterized in that: described azimuth gamma well-logging instrument comprises power circuit block, sensor, signal extracting circuit and counting circuit; Described power circuit block is connected respectively with sensor, signal extracting circuit and counting circuit; Described sensor is connected with signal extracting circuit, and signal extracting circuit is connected with counting circuit.
Described power circuit block comprises Ni-MH battery group, DC transfer circuit, and described Ni-MH battery group is connected with DC transfer circuit;
Described sensor comprises sodium iodide thallium scintillation crystal, photomultiplier, inversion step-up circuit and bleeder circuit, and sodium iodide thallium scintillation crystal is connected with photomultiplier, and photomultiplier is connected with bleeder circuit and inversion step-up circuit;
Described signal extracting circuit comprises AD8011 preamplifying circuit, AD8011 rear class amplifying circuit, MAX962 discriminator circuit and 74121 pulse shapers, and AD8011 preamplifying circuit is connected with AD8011 rear class amplifying circuit, MAX962 discriminator circuit and 74121 pulse shapers successively;
Counting circuit comprises STM32 microcontroller, memory and RS485 communicating circuit, and STM32 microcontroller is connected with memory and RS485 communicating circuit respectively.
A kind of underground coal mine is with the measuring method of boring azimuth gamma well-logging instrument: it is characterized in that: described measuring method step is:
1) start;
2) aperture monitor sends startup command;
3) azimuth gamma well-logging inserting tube powers on;
4) self-inspection of azimuth gamma well-logging instrument is normal, then enter next step, if self-inspection is not just produced, then return the 2nd) step;
5) step-by-step counting is started;
6) judge that pulse counting time is to no, pulse counting time arrives, enters next step, and pulse counting time does not arrive, and continues step-by-step counting;
7) counted number of pulses is converted to the orientation Gama Count value in units of cps;
8) orientation Gama Count value is uploaded to aperture monitor;
9) next measuring point is reached with brill azimuth gamma well-logging instrument;
10) measure end, be enter next step, otherwise return the 5th) step;
11) Data correction and process provide orientation Gama Count curve;
12) end is measured.
Compared with prior art, the advantage that the present invention has and effect as follows: the present invention measures formation information in down-hole drilling automatically by utilizing the azimuth gamma well-logging in gamma ray log, can coordinate with other logging method, for judging the object such as distance and lithology classification of hole spacing Seam Roof And Floor.Logging technique for underground coal mine provides a kind of new approach.
Four, accompanying drawing illustrates:
Fig. 1 is the systematic schematic diagram of orientation, down-hole of the present invention gamma-ray tool;
Fig. 2 is the schematic flow sheet of orientation, down-hole of the present invention gamma-ray tool measuring method.
Five, detailed description of the invention:
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Downhole drill azimuth gamma well-logging instrument provided by the invention, as shown in Figure 1, comprises power circuit block 1, sensor 2, signal extracting circuit 3 and counting circuit 4.
Power circuit block 1 comprises Ni-MH battery group, charging inlet and DC converting electricity,
Described Ni-MH battery group is connected with DC transfer circuit.The DC voltage that Ni-MH battery group exports is through isolation boosting or step-down, and the voltage of generation supplies sensor 2, signal extracting circuit 3 and counting circuit 4 after voltage stabilizing and current limliting.
Sensor 2 comprises sodium iodide thallium scintillation crystal 21, photomultiplier 22, inversion step-up circuit 23 and bleeder circuit 24, can detect natural gamma rays.Sodium iodide thallium scintillation crystal is connected with photomultiplier, and photomultiplier is connected with bleeder circuit and inversion step-up circuit; Sensor 2 itself does not have directionality, for guaranteeing certain directionality, adopts the screening can of tungsten nickel as sensor 2 of window type.The natural gamma rays in direction of windowing can enter sensor 2, and the gamma ray that other direction is come shield by tungsten nickel shell.When the gamma ray of specific direction in stratum enters sodium iodide thallium scintillation crystal 21 by windowing, sodium iodide thallium scintillation crystal 21 is subject to exciting and can sends photon when its de excitation, the photon of collection is converted to photoelectron and doubles by photomultiplier under inversion step-up circuit and bleeder circuit effect, through follow-up multistage multiplication, finally export negative current impulse at the anode of photomultiplier.12v input voltage is transformed to and exports adjustable high voltage by inversion step-up circuit 23, and its scope, between 500V ~ 1000V, can export high pressure by adjustment, photomultiplier is worked within Qi Ping district.Meanwhile, in order to make most of the photonic thallium NaI scintillation crystal 21 can be generated to attract the photomultiplier tube 22 on the photocathode, the need of sodium iodide (Tl) scintillation crystal 21 between the end window photomultiplier tube 22 and end window using optical coupler to achieve good coupling.
Signal extracting circuit 3 comprises AD8011 preamplifying circuit 31, AD8011 rear class amplifying circuit 32, MAX962 discriminator circuit 33 and 74121 pulse shaper 34.AD8011 preamplifying circuit is connected with AD8011 rear class amplifying circuit, MAX962 discriminator circuit and 74121 pulse shapers successively; AD8011 pre-amplifier 31 effect is equivalent to emitter follower, mainly play isolation suitably to amplify the negative pulse that photomultiplier exports with impedance transformation effect simultaneously, AD8011 rear class amplifying circuit 32 is sign-changing amplifiers, the negative pulse that pre-amplifier exports is amplified further and is converted to positive pulse signal.Noise signal wherein and interfering signal, after MAX962 discriminator circuit 33, are got rid of by positive pulse signal, and the pulse signal remained with.Subsequently, spike signal is converted into pulse square wave signal by 74121 pulse shapers 34, sends into STM32 microcontroller 41.
Counting circuit 4 comprises STM32 microcontroller, memory and RS485 communicating circuit.STM32 microcontroller is connected with memory and RS485 communicating circuit respectively; STM32 microcontroller to input pulse square wave by minute in units of carry out step-by-step counting, and the orientation Gama Count value that this count value to be converted to cps (secondary/second) be unit, utilize memory 42 can store this Gama Count value to deposit, this Gama Count value can be uploaded to aperture monitor by RS485 serial communication circuit 43.
As shown in Figure 2, the flow process for utilizing downhole drill azimuth gamma well-logging instrument of the present invention to carry out boring inner orientation gamma survey method.
1) start;
2) aperture monitor sends startup command;
3) azimuth gamma well-logging inserting tube powers on;
4) self-inspection of azimuth gamma well-logging instrument is normal, then enter next step, if self-inspection is not just produced, then return the 2nd) step;
5) step-by-step counting is started;
6) judge that pulse counting time is to no, pulse counting time arrives, enters next step, and pulse counting time does not arrive, and continues step-by-step counting;
7) counted number of pulses is converted to the orientation Gama Count value in units of cps;
8) orientation Gama Count value is uploaded to aperture monitor;
9) next measuring point is reached with brill azimuth gamma well-logging instrument;
10) measure end, be enter next step, otherwise return the 5th) step;
11) Data correction and process provide orientation Gama Count curve;
12) end is measured.
After azimuth gamma well-logging instrument receives the measuring command that aperture monitor issues, automatically power on, measuring circuit is started working, keeping count one minute, obtain two groups of count values, these two groups of count values are converted to the orientation Gama Count value in units of cps by single-chip microcomputer, store and upload this two orientation Gama Count values.Different depth measures orientation Gama Count value through Data correction and process, can draw out two prescription position Gama Count curves on the monitor of aperture.
Claims (3)
1. underground coal mine is with a brill azimuth gamma well-logging instrument, it is characterized in that: described azimuth gamma well-logging instrument comprises power circuit block, sensor, signal extracting circuit and counting circuit; Described power circuit block is connected respectively with sensor, signal extracting circuit and counting circuit; Described sensor is connected with signal extracting circuit, and signal extracting circuit is connected with counting circuit.
2. a kind of underground coal mine according to claim 1 is with brill azimuth gamma well-logging instrument, and it is characterized in that: described power circuit block comprises Ni-MH battery group, DC transfer circuit, described Ni-MH battery group is connected with DC transfer circuit;
Described sensor comprises sodium iodide thallium scintillation crystal, photomultiplier, inversion step-up circuit and bleeder circuit, and sodium iodide thallium scintillation crystal is connected with photomultiplier, and photomultiplier is connected with bleeder circuit and inversion step-up circuit;
Described signal extracting circuit comprises AD8011 preamplifying circuit, AD8011 rear class amplifying circuit, MAX962 discriminator circuit and 74121 pulse shapers, and AD8011 preamplifying circuit is connected with AD8011 rear class amplifying circuit, MAX962 discriminator circuit and 74121 pulse shapers successively;
Counting circuit comprises STM32 microcontroller, memory and RS485 communicating circuit, and STM32 microcontroller is connected with memory and RS485 communicating circuit respectively.
3. a kind of underground coal mine according to claim 1 is with the measuring method of boring azimuth gamma well-logging instrument: it is characterized in that: described measuring method step is:
1) start;
2) aperture monitor sends startup command;
3) azimuth gamma well-logging inserting tube powers on;
4) self-inspection of azimuth gamma well-logging instrument is normal, then enter next step, if self-inspection is not just produced, then return the 2nd) step;
5) step-by-step counting is started;
6) judge that pulse counting time is to no, pulse counting time arrives, enters next step, and pulse counting time does not arrive, and continues step-by-step counting;
7) counted number of pulses is converted to the orientation Gama Count value in units of cps;
8) orientation Gama Count value is uploaded to aperture monitor;
9) next measuring point is reached with brill azimuth gamma well-logging instrument;
10) measure end, be enter next step, otherwise return the 5th) step;
11) Data correction and process provide orientation Gama Count curve;
12) end is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480757.5A CN104265275A (en) | 2014-09-19 | 2014-09-19 | Coal mine underground direction while drilling gama logging instrument and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410480757.5A CN104265275A (en) | 2014-09-19 | 2014-09-19 | Coal mine underground direction while drilling gama logging instrument and measuring method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265275A true CN104265275A (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410480757.5A Pending CN104265275A (en) | 2014-09-19 | 2014-09-19 | Coal mine underground direction while drilling gama logging instrument and measuring method thereof |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763412A (en) * | 2015-02-13 | 2015-07-08 | 中煤科工集团西安研究院有限公司 | Orientation gamma detecting tube for underground coal-seam-following drilling monitoring of coal mine |
| CN105545284A (en) * | 2015-12-14 | 2016-05-04 | 中国石油天然气集团公司 | While-drilling gamma imaging data processing method |
| CN105807307A (en) * | 2016-05-10 | 2016-07-27 | 成都新核泰科科技有限公司 | Car-mounted nuclear radiation flickering detecting system |
| 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 |
| CN105954785A (en) * | 2016-05-10 | 2016-09-21 | 成都新核泰科科技有限公司 | High-precision vehicular nuclear radiation detection system |
-
2014
- 2014-09-19 CN CN201410480757.5A patent/CN104265275A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104763412A (en) * | 2015-02-13 | 2015-07-08 | 中煤科工集团西安研究院有限公司 | Orientation gamma detecting tube for underground coal-seam-following drilling monitoring of coal mine |
| CN105545284A (en) * | 2015-12-14 | 2016-05-04 | 中国石油天然气集团公司 | While-drilling gamma imaging data processing method |
| CN105545284B (en) * | 2015-12-14 | 2018-07-13 | 中国石油天然气集团公司 | One kind is with brill gamma imaging data processing method |
| CN105807307A (en) * | 2016-05-10 | 2016-07-27 | 成都新核泰科科技有限公司 | Car-mounted nuclear radiation flickering detecting system |
| CN105954785A (en) * | 2016-05-10 | 2016-09-21 | 成都新核泰科科技有限公司 | High-precision vehicular nuclear radiation detection system |
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Application publication date: 20150107 |