LU502315B1 - Lithology-oriented online natural gamma logging instrument for cuttings and its logging method - Google Patents
Lithology-oriented online natural gamma logging instrument for cuttings and its logging method Download PDFInfo
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- LU502315B1 LU502315B1 LU502315A LU502315A LU502315B1 LU 502315 B1 LU502315 B1 LU 502315B1 LU 502315 A LU502315 A LU 502315A LU 502315 A LU502315 A LU 502315A LU 502315 B1 LU502315 B1 LU 502315B1
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- cuttings
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- gamma detector
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- 238000005520 cutting process Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims description 25
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 238000005553 drilling Methods 0.000 claims description 40
- 239000012141 concentrate Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 15
- 238000011161 development Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005251 gamma ray Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- 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
- E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data
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- 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)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The application comprises a noise gamma detector, a detection shield, a sample gamma detector and other elements, the detection shield is positioned below the noise gamma detector and the sample gamma detector, the moving limiting slide rod is vertically fixed with the detection shield, the cleaning valve is located below the detection shield, the cuttings collector is located between the cuttings concentration screw propeller and the moving device bracket, the speed reducer is connected with the explosion-proof propulsion motor, the speed reducer is connected with the cuttings concentration screw propeller through the coupling, the explosion-proof motor limiting chassis is positioned below the explosion-proof propulsion motor, the movement control motor is connected with the movement transmission belt, the 3G wireless network transmitter and the serial wired communication port are all connected with the noise gamma detector and the sample gamma detector.
Description
Description LU502315 LITHOLOGY-ORIENTED ONLINE NATURAL GAMMA LOGGING
TECHNICAL FIELD The application relates to a logging instrument, and in particular to a lithology-oriented online natural gamma logging instrument for cuttings and its logging method.
BACKGROUND The natural gamma logging method is a radioactive logging method that measures the cuttings carried by the drilling backflow mud after separation, reflects the gamma ray intensity radiated in the nuclear decay process of the radioactive elements naturally existing in the rock stratum, and recognizes the rock stratum by measuring the natural gamma ray intensity of the cuttings. The natural gamma logging curve has the following functions: Classification of lithology, correlation of strata, and determination of shale content of strata. At the same time, the main influencing factor of natural gamma logging curve is radioactive fluctuation. The so-called cuttings natural gamma logging technology is to use the natural gamma curve, which is mainly related to the content of natural radioactive elements in the formation, and other factors have little impact on it.
The purpose of engineering realization is, the natural gamma energy of cuttings carried by mud returned during drilling is detected to obtain a real-time natural gamma curve reflecting lithology. Since the relative variation of natural gamma curve is only related to the lithology of the strata drilled, therefore, this curve can be fully used for stratigraphic division, stratigraphic comparison, lithologic discrimination, etc., which is beneficial for geological logging workers to meet the challenges of new drilling technology.
One way of measurement is that mud logging personnel use manual method to measure natural gamma, specifically, the cuttings are sampled, cleaned and sealed at the outlet of the drilling shale shaker manually and regularly, and then the sealed cuttings are subjected to natural gamma radiation detection. The detection method comprises the following steps: Firstly, putting the sealed sample into a special testing aluminum box, and then putting the aluminum box containing the sample into a special measuring device with a lead seal for measurement. During the measurement process, it is considered that the background noise in the lead seal is zero. Then,
a real-time natural gamma curve reflecting lithology is formed by obtaining the drilling depth 115023 15 the drilling process. The disadvantage of this measurement method is that including sampling, cleaning, packaging and measurement, all need to be done manually. This not only adds a lot of labor cost to the work site, but also brings a lot of labor work to the measurement itself in the measurement process; at the same time, it is considered that the background noise in the lead sealed tank is zero during the measurement, which is different from the actual situation in the work site, and the local noise existing in the self dark counting process of the gamma measuring device is not considered. In addition, since the processes of sampling, cleaning, packaging and measurement are completed manually one by one, there exists serious hysteresis between the measurement results and the drilling depth, as a result, the measured curve cannot form a complete one-to-one correspondence with the drilling depth well or reflect the real online measurement.
Another measurement method is measurement while drilling, specifically, a set of natural gamma detectors is installed at the position 5-10 meters away from the drill bit for monitoring while drilling. The disadvantage of this measurement method is that the measuring device is located 5-10 meters from the drill bit, which itself is lagging; at the same time, signals obtained by gamma detection are acquired, on one hand, signals are uploaded by taking pipeline mud as a carrier, the main disadvantage is that the bit error rate of the signal uploaded by mud is very high, and sometimes even error transmission occurs; on the other hand, after using the downhole memory for storage, when tripping out, taking out the memory data, and then analyzing the stratum. Its main disadvantage is that it has a strong lag and can't achieve the purpose of real-time monitoring. What's more, the equipment while drilling costs millions or even tens of millions of yuan, which brings a lot of economic burden to the oil development companies.
SUMMARY The technical problem to be solved by the application is to provide a lithology-oriented online natural gamma logging instrument for cuttings and its logging method, which solves the problems of fully automatic processing, online detection, real-time transmission, background noise deduction, detection resource digital sharing and the like in the natural gamma logging process; and the cost is reduced, real-time monitoring and correct transmission are realized, and the natural gamma curve of the stratum corresponding to the drilling depth can be obtained.
The application solves the above technical problems through the following technical scheme: a lithology-oriented online natural gamma logging instrument for cuttings, which (85023 15 characterized by comprising: A noise gamma detector, a detection shield, a sample gamma detector, a cleaning valve, cuttings collector, cuttings concentration screw propeller, a moving device bracket, a moving limit slide rod, a speed reducer, explosion-proof propulsion motor, movement control pulley block, a movement control motor, a movement transmission belt, explosion-proof motor limiting chassis, a coupling, a 3G wireless network transmitter and a serial wired communication port; the detection shield is positioned below the noise gamma detector and the sample gamma detector, the moving limiting slide rod is vertically fixed with the detection shield, the cleaning valve is located below the detection shield, the cuttings collector is located between the cuttings concentration screw propeller and the moving device bracket, the speed reducer is connected with the explosion-proof propulsion motor, the speed reducer is connected with the cuttings concentration screw propeller through the coupling, the explosion-proof motor limiting chassis is positioned below the explosion-proof propulsion motor, the movement control motor is connected with the movement transmission belt, the 3G wireless network transmitter and the serial wired communication port are all connected with the noise gamma detector and the sample gamma detector.
The application also provides a lithology-oriented online natural gamma logging instrument for cuttings and its logging method, which is characterized by comprising the following steps: At the outlet of the drilling cuttings shale shaker, a moving device bracket, a moving limit slide rod, a movement control pulley block, a moving control motor, a moving transmission belt and an explosion-proof motor limiting chassis are arranged, the moving control motor drags the moving transmission belt to move; by moving movement control pulley block, the moving transmission belt drags the whole movement of the cuttings collector, the cuttings concentration screw propeller, the speed reducer, the explosion-proof propulsion motor, the coupling, the noise gamma detector, the detection shield, the sample gamma detector, the cleaning valve, the 3G wireless network transmitter, serial communication port and the clean valve for preventing debris from drying and caking and blocking when not in use for a long time; and the cuttings collector is positioned just below the cuttings outlet of the shaker screen for drilling operations for picking up the drilling cuttings at the outlet of the vibrating screen. The cuttings in the cuttings collector are decelerated by the explosion-proof propulsion motor and the speed reducer, the coupling pushes the cuttings to concentrate, the screw propeller concentrates the cuttings in the detection shield, the concentrated cuttings are continuously pushed by the cuttings concentration screw 502315 propeller and continuously pass through the on-line detection of the sample gamma detector, a mixed online detection value of the detected sample natural gamma and the natural environment gamma is obtained; at the same time, the gamma detector also detects the gamma value of the background noise. The mixed online detection value and the background noise gamma value are transmitted to an upper computer through a 3G wireless network transmitter or a serial wired communication port for operational analysis.
The positive progressive effect of the application 1s that: According to the application, in the field logging process, the work such as cuttings fishing, cleaning, packaging and manual measurement have been fully automated, which saves a lot of labor cost for logging; the cuttings sampling point of the device is below the drilling shale shaker, and at the same time, it 1s propelled by the screw propeller, so that the sampled cuttings can be concentrated and measured in the shortest time, also the measurement result of the device corresponds to the drilling depth with the shortest delay characteristic; it fundamentally solves the one-to-one correspondence between online measurement, real-time corresponding natural cuttings sticking and drilling geological characteristics, which greatly promotes the development of drilling technology. The traditional detection method has the problem that the fluctuation of background noise affects the measurement result, thus leading to the existence of error in the judgment of lithologic characteristics and even sometimes the wrong judgment of lithology, which is effectively solved in the mud logging process by setting up a set of background noise detection device; the device is connected with the host computer by 3G network communication and wired serial data communication, which meets the needs of digital oilfield development to a great extent, and at the same time, the real-time data of natural gamma measurement of the device is shared to the greatest extent. By taking the one-to-one correspondence between the drilling depth signal and the real-time natural gamma measurement data, the device makes the geological characteristics of the drilled stratum and the depth of the stratum form a perfect plane graphic display, which is a relatively intuitive display effect of the stratum characteristics. At the same time, the application of the device is completely on the ground, so that the whole device avoids the expensive underground equipment in the logging while drilling process.
BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is a three-dimensional structure diagram of the lithology-oriented online natural gamma logging instrument for cuttings of the present application; LU502315 FIG. 2 is a schematic diagram of the cleaning valve and the outlet of cuttings in the lithology-oriented online natural gamma logging instrument for cuttings of the present application.
FIG. 3 is a schematic diagram of the display interface of the upper computer.
DESCRIPTION OF THE APPLICATION The following preferred embodiments of the present application are given with reference to the drawings to explain the technical scheme of the present application in detail.
As shown in FIG. 1 and FIG. 2, a lithology-oriented online natural gamma logging instrument for cuttings, which comprises: A noise gamma detector 1, a detection shield 2, a sample gamma detector 3, a cleaning valve 4, a cuttings collector 5, a cuttings concentration screw propeller 6, a moving device bracket 7, a moving limit slide rod 8, a speed reducer 9, an explosion-proof propulsion motor 10, movement control pulley block 11, a movement control motor 12, a movement transmission belt 13, an explosion-proof motor limiting chassis 14, a coupling 15, a 3G wireless network transmitter 16 and a serial wired communication port 17; the detection shield 2 is positioned below the noise gamma detector 1 and the sample gamma detector 3, the moving limiting slide rod 8 is vertically fixed with the detection shield 2, the cleaning valve 4 is located below the detection shield 2, the cuttings collector 5 is located between the cuttings concentration screw propeller 6 and the moving device bracket 7, the speed reducer 9 is connected with the explosion-proof propulsion motor 10, the speed reducer 9 is connected with the cuttings concentration screw propeller 6 through the coupling 15, the explosion-proof motor limiting chassis 14 is positioned below the explosion-proof propulsion motor 10, the movement control motor 12 is connected with the movement transmission belt 13, the 3G wireless network transmitter 16 and the serial wired communication port 17 are all connected with the noise gamma detector 1.
The application is directly installed below the drilling vibrating screen, the cuttings vibrated by the vibrating screen directly fall into the cuttings collector 5, the cuttings are directly pushed into the detection shield 2 by the concentration propulsion system (the explosion-proof propulsion motor 10, the speed reducer 9, the coupling 15, the explosion-proof motor limiting chassis 14, the cuttings concentration screw propeller 6) to achieve the purpose of cuttings concentration; the cuttings positioned in the detection shield 2 pass through the detection of the detection system (the sample gamma detector 3, the noise gamma detector 1, the detection shie|d 5023 15 2, the cleaning valve 4, and the outlet of cuttings 18) to realize the purpose of full-automatic on-line detection, the traditional processes of manually taking cuttings, cleaning, packaging, testing and the like in the gamma detection process are completely automatically processed, the whole natural gamma logging detection program is greatly simplified, and the labor cost is greatly reduced. At the same time, the detection system also designed a set of remote data transmission system (the 3G wireless network transmitter 16, the serial wired communication port 17), which can directly exchange data with the upper computer to directly transmit the detected data to the upper computer for processing, it can also realize remote data sharing, facilitate digital network control of oil fields, and realize the purpose of real-time monitoring. At the same time, it is also convenient for logging workers to combine the upper computer system software to obtain the drilling depth and obtain a lithologic natural gamma curve corresponding to the drilling depth one by one, which is convenient for field workers to compare the formation characteristics. The cleaning valve 4 also has the function of shielding gamma rays. The cleaning valve 4 is located below the detection shield 2 and connected with the detection shield by a movable buckle. The cuttings outlet 18 is located on the cleaning valve 4, and the cuttings outlet is specially designed for the cuttings after detection to fall into the cuttings pool.
The logging method of the lithology-oriented online natural gamma logging instrument for cuttings comprises the following steps: At the outlet of the drilling cuttings shale shaker, an automatic movement control section is provided (the moving device bracket 7, the moving limit slide rod 8, the movement control pulley block 11, the movement control motor 12, the movement transmission belt 13, the explosion-proof motor limiting chassis 14), the moving control motor 12 drags the moving transmission belt 13 to move, by moving movement control pulley block 11, the moving transmission belt 13 drags the drilling cuttings sampling collection and concentration part (the cuttings collector 5, the cuttings concentration screw propeller 6, the speed reducer 9, the explosion-proof propulsion motor 10, the coupling 15), the detection system with background noise deduction (the noise gamma detector 1, the detection shield 2, the sample gamma detector 3, the cleaning valve 4), the remote data transmission system (the 3G wireless network transmitter 16, the serial wired communication port 17), and prevent the whole movement of the cleaning part (the cleaning valve 4) blocked by dry and caking of cuttings when not in use for a long time. And the cuttings collector 5 is positioned just below the cuttings outlet of the vibrating screen for drilling work to receive the drilling cuttings at the outlet of the 5003 15 vibrating screen; the cuttings in the cuttings collector 5 push the cuttings concentration screw 6 through the explosion-proof propulsion motor 10, the reduction gear of the reduction gear 9, and the coupling 15 to concentrate the cuttings in the detection shield 2, the concentrated cuttings are continuously pushed by the cuttings concentration screw propeller 6 and continuously pass through the online detection of the sample gamma detector 3 to obtain a mixed online detection value A of the detected natural gamma of the sample and the natural environment gamma, at the same time, the noise gamma detector 1 also detects the background noise gamma value B; mixing that on-line detection value A and the background noise gamma value B, It is transmitted to an upper computer for operational analysis through the 3G wireless network transmitter 16 or the serial wired communication port 17. The upper computer can obtain the inherent natural gamma value C of the rock cuttings after deducting the background noise gamma value B according to needs, where C=A-B, the upper computer device software obtains a lithology while drilling characteristic map with the background noise deducted by retrieving the drilling depth signal and combining with the inherent natural gamma value c of the cuttings (as shown in FIG. 3), a detection setting interface 55 is provided in the characteristic diagram; mixed online detection value A digital display and mixed online detection value A linear transformation trend graphical display interface 57; the background noise gamma value B digital display and that background noise gamma value B linear transformation trend graphical display interface 58; an inherent natural gamma value C digital display and inherent natural gamma value C linear transformation trend graphic display interface 59; the drilling depth signal digital display interface 56; A graphical representation of the formation structure with inherent natural gamma values corresponding to depth display interface 60.
According to the application, in the field logging process, the work such as cuttings fishing, cleaning, packaging and manual measurement have been fully automated, which saves a lot of labor cost for logging; the cuttings sampling point of the device is below the drilling shale shaker, and at the same time, it is propelled by the screw propeller, so that the sampled cuttings can be concentrated and measured in the shortest time, also the measurement result of the device corresponds to the drilling depth with the shortest delay characteristic; it fundamentally solves the one-to-one correspondence between online measurement, real-time corresponding natural cuttings sticking and drilling geological characteristics, which greatly promotes the development of drilling technology. The traditional detection method has the problem that the fluctuation Pfi5023 15 background noise affects the measurement result, thus leading to the existence of error in the judgment of lithologic characteristics and even sometimes the wrong judgment of lithology, which is effectively solved in the mud logging process by setting up a set of background noise detection device; the device is connected with the host computer by 3G network communication and wired serial data communication, which meets the needs of digital oilfield development to a great extent, and at the same time, the real-time data of natural gamma measurement of the device is shared to the greatest extent. By taking the one-to-one correspondence between the drilling depth signal and the real-time natural gamma measurement data, the device makes the geological characteristics of the drilled stratum and the depth of the stratum form a perfect plane graphic display, which is a relatively intuitive display effect of the stratum characteristics. At the same time, the application of the device is completely on the ground, so that the whole device avoids the expensive underground equipment in the logging while drilling process.
The above-mentioned specific embodiments further explain in detail the technical problems, technical solutions and beneficial effects of the present application. It should be understood that the above-mentioned specific embodiments are only physical embodiments of the present application and are not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included within the scope of protection of the present application.
Claims (2)
1. A lithology-oriented online natural gamma logging instrument for cuttings, which 1s characterized by comprising a noise gamma detector, a detection shield, a sample gamma detector, a cleaning valve, cuttings collector, cuttings concentration screw propeller, a moving device bracket, a moving limit slide rod, a speed reducer, explosion-proof propulsion motor, movement control pulley block, a movement control motor, a movement transmission belt, explosion-proof motor limiting chassis, a coupling, a 3G wireless network transmitter and a serial wired communication port; the detection shield is positioned below the noise gamma detector and the sample gamma detector, the moving limiting slide rod is vertically fixed with the detection shield, the cleaning valve is located below the detection shield, the cuttings collector is located between the cuttings concentration screw propeller and the moving device bracket, the speed reducer is connected with the explosion-proof propulsion motor, the speed reducer is connected with the cuttings concentration screw propeller through the coupling, the explosion-proof motor limiting chassis is positioned below the explosion-proof propulsion motor, the movement control motor is connected with the movement transmission belt, the 3G wireless network transmitter and the serial wired communication port are all connected with the noise gamma detector and the sample gamma detector.
2. A logging method of the lithology-oriented online natural gamma logging instrument according to claim 1, which is characterized by comprising the following steps: at the outlet of the drilling cuttings shale shaker, a moving device bracket, a moving limit slide rod, a movement control pulley block, a moving control motor, a moving transmission belt and an explosion-proof motor limiting chassis are arranged, the moving control motor drags the moving transmission belt to move; by moving movement control pulley block, the moving transmission belt drags the whole movement of the cuttings collector, the cuttings concentration screw propeller, the speed reducer, the explosion-proof propulsion motor, the coupling, the noise gamma detector, the detection shield, the sample gamma detector, the cleaning valve, the 3G wireless network transmitter, serial communication port and the clean valve for preventing debris from drying and caking and blocking when not in use for a long time; and the cuttings collector is positioned just below the cuttings outlet of the shaker screen for drilling operations for picking up the drilling cuttings at the outlet of the vibrating screen; the cuttings in the cuttings collector are decelerated by the explosion-proof propulsion motor and the speed reducer, the coupling pushes the cuttings to concentrate, the screw propeller concentrates the cuttings in the detection shield, the, 5023 15 concentrated cuttings are continuously pushed by the cuttings concentration screw propeller and continuously pass through the on-line detection of the sample gamma detector, a mixed online detection value of the detected sample natural gamma and the natural environment gamma is obtained; at the same time, the gamma detector also detects the gamma value of the background noise; the mixed online detection value and the background noise gamma value are transmitted to an upper computer through a 3G wireless network transmitter or a serial wired communication port for operational analysis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU502315A LU502315B1 (en) | 2022-06-20 | 2022-06-20 | Lithology-oriented online natural gamma logging instrument for cuttings and its logging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU502315A LU502315B1 (en) | 2022-06-20 | 2022-06-20 | Lithology-oriented online natural gamma logging instrument for cuttings and its logging method |
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| Publication Number | Publication Date |
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| LU502315B1 true LU502315B1 (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| LU502315A LU502315B1 (en) | 2022-06-20 | 2022-06-20 | Lithology-oriented online natural gamma logging instrument for cuttings and its logging method |
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