While-drilling azimuth gamma measuring device

Abstract

The invention relates to the technical field of drilling engineering, in particular to a while-drilling azimuth gamma measuring device which comprises a drill rod, a drill bit is arranged at one end of the drill rod, a containing cavity is formed in the drill rod, and a measurer is arranged in the containing cavity; according to the invention, the filtering ring is driven to rotate at a certain frequency, and the light-transmitting area and the light-blocking area on the filtering ring can continuously and alternately rotate on the beam shaper, so that the rotation frequency of the light-transmitting area is synchronized with the frequency of the target stratum; when the light beams emitted by the light beam shaper, which are consistent with the rotation frequency of the light transmitting area, can pass through the light transmitting area and can be recorded by the photoelectric detector arranged in the light sensing area, and the light beams of the non-target stratum can be blocked by the light blocking area, gamma radioactive rays of the stratum in the corresponding direction are captured and measured through the scintillation crystal plate in each measuring cavity; therefore, the direction of the target stratum is judged, and the drilling direction of the drill bit is adjusted in time.

Description

Technical Field

[0001] The present application relates to the technical field of drilling engineering, and in particular to a while-drilling azimuth gamma measurement device. Background Art

[0002] Radioactive elements in the strata (such as uranium, thorium, potassium, etc.) will release gamma rays, which are received by detectors installed on the drill bit. By analyzing these gamma curves, changes in the radioactivity intensity of the strata can be identified, thereby determining the position of the top and bottom plates of coal seams or oil layers.

[0003] During the drilling process, geological guidance engineers can adjust the drilling trajectory in a timely manner based on the information provided by the gamma curve to ensure that the drill bit effectively passes through the optimal position of the coal seam. This real-time adjustment not only improves drilling efficiency, but also reduces drilling risks and costs.

[0004] For example, the well inclination and azimuth gamma drilling measuring instrument with publication number CN1676874B relates to the field of oil drilling engineering technology. The prior art includes: a drill collar, two V-grooves, a metal shielding layer, two gamma sensors, a three-axis acceleration sensor, a signal processing circuit module, a high-pressure sealing cover plate, a drilling fluid diversion channel, an upper slip ring connector, a lower slip ring connector, and a wire hole. The instrument integrates the azimuth gamma measurement function and the well inclination measurement function in the same short section. Therefore, during the drilling process, it can not only measure the lithology of the formation in real time, but also distinguish the lithology characteristics of the upper and lower interfaces, effectively discover the upper cap layer of the reservoir, and capture the best time to enter the oil and gas reservoir. While distinguishing the lithology characteristics of the upper and lower interfaces, it can measure the well inclination and drill bit status of the point in real time without lag, which is conducive to timely adjusting the wellbore trajectory according to geological information and controlling the drill bit to pass through the best position in the reservoir.

[0005] However, the above existing technologies still have some defects when receiving and processing gamma radiation: In practical applications, in addition to natural gamma radiation, there are multiple magnetic fields in the formation, which will affect the measurement results of gamma radiation. At the same time, there are a large number of electromagnetic interference sources in the drilling environment, such as power equipment, communication equipment, and motors. These electromagnetic interferences will affect the electronic circuits of the detector through spatial coupling or conduction, increase signal noise, and affect the detection accuracy of gamma rays, resulting in the sensor being unable to accurately reflect the true gamma radiation intensity of the formation, which not only affects the accuracy of the measurement, but may also lead to misjudgment of the lithological characteristics of the formation, thereby affecting the decision-making and effect of the drilling operation.

[0006] At the same time, the measurement response of the gamma sensor is focused on the formation in the fan-shaped area corresponding to the V-shaped groove. Although it can concentrate on measuring the formation gamma rays in a specific direction, it cannot effectively receive the formation gamma rays in other directions, which not only affects the comprehensiveness and accuracy of the measurement, but may also lead to misunderstanding of the formation structure, thereby affecting the adjustment of the drilling trajectory and the efficiency of the drilling operation.

[0007] Based on this, and in accordance with the above-mentioned viewpoints, there is still room for improvement in the existing technology for receiving and processing gamma radiation. Summary of the invention

[0008] In order to solve the above technical problems, the present application provides a while drilling azimuth gamma measurement device, which adopts the following technical solutions: A while-drilling azimuth gamma measurement device comprises a drill rod, one end of which is provided with a drill bit, a receiving cavity is provided in the drill rod, and a measuring device is provided in the receiving cavity; The measuring device comprises a protective shell arranged in a containing cavity, wherein a partition plate is arranged in the protective shell, and the partition plate divides the protective shell into a plurality of circumferentially evenly distributed measuring cavities, and a scintillation crystal plate is arranged inside the measuring cavity.

[0009] Preferably, a convex mirror glass located on one side of the scintillation crystal plate is provided in the measuring cavity, and a light blocking plate is provided on one side of the convex mirror glass.

[0010] Preferably, a protective tube located between the multiple measuring cavities is provided in the accommodating cavity, a plurality of light guide rods connected to the convex mirror glass are passed through the light blocking plate, and a light guide rod located in the protective tube is commonly provided at one end of the plurality of light guide rods.

[0011] Preferably, a protective cover is provided at the upper end of the protective shell, an isolation plate is provided inside the protective cover, the isolation plate divides the inside of the protective cover into isolation cavities corresponding to the light guide rods one by one, and the upper end of the light guide rod passes through the isolation cavity.

[0012] Preferably, a filter is provided in the protective cover; The filter comprises an optical fiber amplifier arranged on a light guide rod, and a beam shaper is arranged on the upper end of the light guide rod.

[0013] Preferably, a filter ring located above the beam shaper is rotatably arranged in the protective cover, and light-transmitting areas and light-blocking areas are alternately arranged circumferentially on the filter ring.

[0014] Preferably, a photosensitive disc located at the end of the filter ring is arranged in the protective shell, and a photosensitive area corresponding to the light beam shaping is arranged on the photosensitive disc.

[0015] Preferably, an arc-shaped cover is provided at the lower end of the protective shell, and an arc-shaped crystal plate is provided inside the arc-shaped cover; and an arc-shaped convex mirror located at the upper end of the arc-shaped crystal plate is provided inside the arc-shaped cover.

[0016] Preferably, a guide fiber connected to the arc-shaped convex mirror is passed through the protective tube, the upper end of the guide fiber penetrates to the upper end of the optical disc, and a fiber amplifier and a beam shaper are also provided at the upper end of the guide fiber.

[0017] Preferably, a driving shaft is rotatably provided on the optical disc, a filter disc located at the upper end of the optical fiber is provided on the upper end of the driving shaft, and transparent areas and light-blocking areas are staggeredly provided on the filter disc in a circumferential direction.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention drives the filter ring to rotate at a certain frequency, and the light-transmitting area and the light-blocking area on the filter ring will continuously rotate alternately on the beam shaper, and the rotation frequency of the light-transmitting area is synchronized with the frequency of the target formation. When the light beam emitted by the beam shaper that is consistent with the rotation frequency of the light-transmitting area can pass through the light-transmitting area and be recorded by the photoelectric detection set in the photosensitive area, the light beam of the non-target formation will be blocked by the light-blocking area, and the gamma radioactive rays of the formation in the corresponding direction are captured by the scintillation crystal plate in each measuring cavity to measure the direction of the target formation, so as to judge the direction of the target formation and adjust the drilling direction of the drill bit in time.

[0019] 2. The present invention drives the filter disk to rotate at a certain frequency, and the transparent area and the light-blocking area arranged circumferentially staggered on the filter disk rotate. The transparent area and the light-blocking area will continuously rotate alternately on the beam shaper, and the rotation frequency of the transparent area is synchronized with the frequency of the target formation. When the light beam emitted by the beam shaper that is consistent with the rotation frequency of the transparent area can pass through the transparent area and be recorded by the photoelectric detection set in the photosensitive area, the light beam of the non-target formation will be blocked by the light-blocking area, thereby determining whether the forward direction is consistent with the target direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a three-dimensional cross-sectional view of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the measuring device of the present invention.

[0023] Figure 4 It is a cross-sectional view of the protective shell of the present invention.

[0024] Figure 5 It is a cross-sectional view of the measuring device of the present invention.

[0025] Figure 6The present invention Figure 5 A partial enlarged view of point A.

[0026] Figure 7 It is a schematic diagram of the structure of the filter of the present invention.

[0027] Figure 8 The present invention Figure 7 A partial enlarged view of point B.

[0028] Fig. 9 is a cross-sectional view of the filter of the present invention.

[0029] Fig.10 It is a schematic diagram of the structure of the filter ring of the present invention.

[0030] Fig.11 It is a cross-sectional view of the arc cover of the present invention.

[0031] Fig.12 It is a schematic diagram of the structure between the power supply block, the electromagnetic detector and the conductive block of the present invention.

[0032] Fig.13 The present invention Fig.12 A partial enlarged view of point C.

[0033] Fig.14 It is a structural schematic diagram of the guide member of the present invention.

[0034] Explanation of reference numerals: 1, drill rod; 11, drill bit; 2, accommodating cavity; 3, measuring device; 31, protective shell; 32, partition plate; 321, measuring cavity; 33, scintillating crystal plate; 34, convex mirror glass; 35, light shielding plate; 36, protective tube; 37, light guide rod; 38, light guide rod; 39, protective cover; 391, isolation plate; 392, isolation cavity; 4, filter; 41, optical fiber amplifier; 42, beam shaper; 43, filter ring; 431, light transmission area; 432, light shielding Area; 44, optical disc; 441, photosensitive area; 45, arc cover; 46, arc crystal plate; 47, arc convex mirror; 48, optical fiber; 49, driving shaft; 5, filter disk; 51, transparent area; 52, light blocking area; 53, gear ring; 54, driving gear; 55, power block; 56, electromagnetic detector; 57, conductive block; 6, guide; 61, slide groove; 62, magnetic ring; 63, slide groove; 64, slide block; 65, telescopic rod; 66, guide ring; 67, transmission shaft. DETAILED DESCRIPTION

[0035] The following is combined with Figures 1 to 14 This application is described in further detail.

[0036] The embodiment of the present application discloses a gamma ray measurement device for azimuth while drilling, which captures and measures the gamma ray of the formation in the corresponding direction, blocks the converted light beam of the target formation, thereby determining the direction of the target formation and adjusting the drilling direction of the drill bit in time.

[0037] Embodiment 1: There are some natural radioactive elements in the strata, such as uranium (U), thorium (Th) and potassium (K). These elements will release high-energy gamma rays during the decay process. These gamma rays are emitted from the strata in the form of photons and propagate in all directions. Different homogeneous strata will release different gamma radioactive rays. When drilling, the position of the target stratum is determined by measuring the gamma radioactive rays in the stratum to guide the direction of drilling. Other measurement methods are generally used to detect stratum information, such as using an electromagnetic transmitter to emit electromagnetic radiation underground, and then detecting the returned electromagnetic signal to determine the position of the target stratum.

[0038] Reference Figure 1 and Figure 2 As shown, the emitted electromagnetic signal will affect the detection result of gamma radioactive rays. In order to solve this problem, a gamma azimuth measurement device while drilling is provided, including a drill pipe 1. A drill bit 11 is arranged at one end of the drill pipe 1. The drill pipe 1 is driven to rotate by a drilling rig, thereby driving the drill bit 11 to drill downward.

[0039] An accommodating chamber 2 is provided in the drill rod 1. During the drilling process, a measuring device 3 provided in the accommodating chamber 2 determines the position of the target formation by measuring the gamma radiation in the formation, so as to guide the drilling direction of the drill bit 11.

[0040] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, specifically, the measuring device 3 includes a protective shell 31 arranged in the accommodating cavity 2, a partition plate 32 is arranged in the protective shell 31, the partition plate 32 divides the protective shell 31 into a plurality of circumferentially uniformly distributed measuring cavities 321, and a scintillation crystal plate 33 is arranged on the outer side of the measuring cavity 321.

[0041] When the drill rod 1 drives the drill bit 11 to drill, the gamma radiation released by the formation will be captured by the scintillation crystal plate 33 and enter the scintillation crystal plate 33, interacting with the atoms inside the crystal, so that the atoms in the scintillation crystal plate 33 are excited to a higher energy level. Subsequently, these excited atoms will release photons when returning to a lower energy level. These photons are usually visible light or ultraviolet light fluorescence, which causes the scintillation crystal plate 33 to have a scintillation effect. The fluorescence will be refracted and converged to the middle through the convex mirror glass 34 set in the measuring cavity 321. The convex mirror glass 34 is located on one side of the scintillation crystal plate. The scintillation crystal plate 33 in each measuring cavity 321 captures the gamma radiation of the formation in the corresponding direction.

[0042] A light baffle 35 is provided on one side of the convex mirror glass 34, and a protective tube 36 located between the multiple measuring cavities 321 is provided in the accommodating cavity 2. Several light guide rods 37 connected to the convex mirror glass 34 are passed through the light baffle 35. The converged fluorescence will be refracted into the light guide rods 37. A light guide rod 38 is commonly provided at one end of the several light guide rods 37. The fluorescence in the several light guide rods 37 will enter the commonly connected light guide rods 38, and the light guide rod 38 is located in the protective tube 36.

[0043] A protective cover 39 is disposed at the upper end of the protective shell 31 . An isolation plate 391 is disposed inside the protective cover 39 . The isolation plate 391 divides the interior of the protective cover 39 into isolation cavities 392 corresponding to the light guide rods 38 . The upper end of the light guide rod 38 passes through the isolation cavity 392 .

[0044] Then, the filter 4 disposed in the protective cover 39 will filter the redundant gamma radioactive ray information in the formation, thereby obtaining the gamma radioactive ray information of the target formation to determine the position of the target formation and improve the measurement effect.

[0045] Reference Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, specifically, the filter 4 includes an optical fiber amplifier 41 disposed on the light guide rod 38. The optical fiber amplifier 41 is doped with specific rare earth elements (such as erbium, ytterbium, etc.) and utilizes the amplification effect of these elements when stimulated by light to enhance the signal light, so that the fluorescence passing through the optical fiber amplifier 41 will be amplified and then enter the beam shaper 42 disposed at the upper end of the light guide rod 38.

[0046] The beam shaper 42 adjusts the divergence angle and intensity distribution of the light beam, utilizes the refraction and reflection characteristics of the lens or the reflector, changes the propagation path and shape of the light beam, and shapes the input light beam into the desired output light beam shape to emit the light beam.

[0047] The gamma rays captured by the scintillation crystal plate 33 scintillate at a high frequency according to the frequency of the gamma rays and are input into the beam shaper 42 through the light guide rod 37 and the light guide rod 38 . The beam shaper 42 emits a high-frequency beam according to the scintillation frequency of the scintillation crystal plate 33 .

[0048] Among them, a light-sensitive disc 44 located at the end of the filter ring 43 is arranged in the protective shell 31, and a light-sensitive area 441 corresponding to the beam shaping is arranged on the light-sensitive disc 44. The high-frequency light beam emitted by the beam shaper 42 will fall into the light-sensitive area 441. The photoelectric detector arranged in the light-sensitive area 441 can record the frequency of the light beam emission and can convert the light signal into an electrical signal. These electrical signals contain the intensity and frequency information of the gamma ray. By analyzing these data, the radioactivity intensity and lithology characteristics of the stratum can be inferred, so as to timely adjust the drilling direction of the drill bit 11.

[0049] During this process, a filter ring 43 is rotatably disposed in the protective cover 39 and is located above the beam shaper 42 . The filter ring 43 has light-transmitting areas 431 and light-blocking areas 432 that are circumferentially staggered. The light beam emitted by the beam shaper 42 can pass through the light-transmitting areas 431 but cannot pass through the light-blocking areas 432 .

[0050] By driving the filter ring 43 to rotate at a certain frequency, the light-transmitting areas 431 and light-blocking areas 432 circumferentially staggered on the filter ring 43 will continuously rotate alternately on the beam shaper 42, and the rotation frequency of the light-transmitting areas 431 will be synchronized with the frequency of the target formation. When the light beam emitted by the beam shaper 42 is consistent with the rotation frequency of the light-transmitting area 431, it can pass through the light-transmitting area 431 and be recorded by the photoelectric detection set in the photosensitive area 441, while the light beam of the non-target formation will be blocked by the light-blocking area 432.

[0051] The scintillation crystal plate 33 in each measuring cavity 321 captures the gamma radioactive rays of the formation in the corresponding direction, thereby determining the direction of the target formation and adjusting the drilling direction of the drill bit 11 in time.

[0052] Reference Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a curved cover 45 is provided at the lower end of the protective shell 31 , a curved crystal plate 46 is provided inside the curved cover 45 , and a curved convex mirror 47 located at the upper end of the curved crystal plate 46 is provided inside the curved cover 45 .

[0053] The gamma radiation in the forward direction of the drill bit 11 will be captured by the curved crystal plate 46 and enter the scintillation crystal plate 33, interacting with the atoms inside the crystal, so that the atoms in the curved crystal plate 46 are excited to a higher energy level. Subsequently, these excited atoms will release photons when returning to a lower energy level. These photons are usually visible light or ultraviolet light fluorescence, which causes the curved crystal plate 46 to have a scintillation effect. The fluorescence will be refracted toward the middle through the curved convex mirror 47 provided in the curved cover 45. The curved convex mirror 47 is refracted at the upper end of the curved crystal plate 46.

[0054] The converged fluorescence will be refracted into the optical fiber 48 passing through the protective tube 36. The optical fiber 48 is connected to the arc convex mirror 47. The upper end of the optical fiber 48 passes through the upper end of the optical disc 44. The upper end of the optical fiber 48 is also provided with an optical fiber amplifier 41 and a beam shaper 42.

[0055] The optical fiber amplifier 41 utilizes the amplification effect of these elements when stimulated by light to enhance the signal light, so that the fluorescence passing through the optical fiber amplifier 41 in the optical fiber 48 is amplified, and then enters the beam shaper 42 arranged at the upper end of the optical fiber 48. The beam shaper 42 adjusts the divergence angle and intensity distribution of the light beam, utilizes the refraction and reflection characteristics of the lens or the reflector, changes the propagation path and shape of the light beam, and shapes the input light beam into the desired output light beam shape to emit the light beam upward.

[0056] By recording the frequency of the light beam emitted by the photoelectric detector, the optical signal can be converted into an electrical signal. These electrical signals contain the intensity and frequency information of the gamma rays. By analyzing these data, the radioactivity intensity and lithological characteristics of the formation can be inferred, thereby verifying the formation information of the drilling direction of the drill bit 11.

[0057] A driving shaft 49 is rotatably provided on the optical disc 44. A filter disc 5 located at the upper end of the optical fiber 48 is provided on the upper end of the driving shaft 49. Transparent areas 51 and light-blocking areas 52 are staggeredly provided on the filter disc 5 in a circumferential direction.

[0058] By driving the driving shaft 49 to rotate, the rotating driving shaft 49 will drive the filter disk 5 arranged thereon to rotate together, and the rotating filter disk 5 will drive the transparent areas 51 and the light blocking areas 52 arranged in a circumferentially staggered manner to rotate.

[0059] By driving the filter disk 5 to rotate at a certain frequency, the transparent areas 51 and the light-blocking areas 52 staggeredly arranged in the circumferential direction on the filter disk 5 rotate, and the transparent areas 51 and the light-blocking areas 52 will continuously rotate alternately on the beam shaper 42, and the rotation frequency of the transparent area 51 is synchronized with the frequency of the target formation. When the light beam emitted by the beam shaper 42 that is consistent with the rotation frequency of the transparent area 51 can pass through the transparent area 51 and be recorded by the photoelectric detection set in the photosensitive area 441, the light beam of the non-target formation will be blocked by the light-blocking area 432, thereby determining whether the forward direction is consistent with the target direction.

[0060] Embodiment 2: Reference Fig.12 and Fig.13 As shown, on the basis of the first embodiment, a gear ring 53 is disposed in the filter ring 43 , and a driving gear 54 meshing with the gear ring 53 is disposed on the driving shaft 49 .

[0061] The rotating driving shaft 49 drives the driving gear 54 to rotate together. The rotating driving gear 54 drives the filter disc 5 and the filter ring 43 to rotate together through the engagement with the ring gear 53, so that the rotation frequencies of the filter disc 5 and the filter ring 43 are synchronized.

[0062] A power block 55 is disposed on the light blocking area 52 of the filter disc 5 , an electromagnetic detector 56 is disposed on the protective cover 39 , and a conductive block 57 electrically connected to the power block 55 is disposed at the power supply end of the electromagnetic detector 56 .

[0063] When the filter disk 5 rotates, it will drive the power-on block 55 set on the light-blocking area 52 to rotate together. During the rotation of the filter disk 5, multiple power-on blocks 55 are electrically connected with the conductive block 57 in turn, so that the electromagnetic detector 56 emits an electromagnetic signal for detection through the frequency of the rotation of the power-on block 55. Since the power-on block 55 is located on the light-blocking area 52, the influence of the returned electromagnetic signal on the light beam is blocked, thereby improving the accuracy of the measurement.

[0064] Embodiment three: Reference Figure 4 As shown, on the basis of the first and second embodiments, since the drill rod 1 rotates, the measuring direction is constantly changing, which affects the accuracy of the measurement. The guide member 6 provided on the drill rod 1 slows down the rotation of the protective shell 31, and the guide member 6 controls the drilling direction of the drill bit 11. Specifically, the guide member 6 includes a protective shell 31 rotatably disposed in the accommodating chamber 2 , and the protective shell 31 is magnetic. A slide groove 61 corresponding to the protective shell 31 is provided on the drill rod 1 , and a magnetic ring 62 is rotatably disposed in the slide groove 61 .

[0065] A plurality of sliding grooves 63 are provided on the circumferential direction of the magnetic ring 62, and a sliding block 64 is slidably arranged in the sliding groove 63, and a telescopic rod 65 is symmetrically and rotatably arranged on the sliding block 64. When the telescopic rod 65 is fully extended, a guide ring 66 is commonly arranged at one end of the plurality of telescopic rods 65. A transmission shaft 67 threadedly connected to the sliding block 64 is rotatably arranged in the sliding groove 63.

[0066] During the drilling process of the drill bit 11, the guide ring 66 will contact the well wall, so that the guide ring 66 does not rotate with the drill rod 1, and the telescopic rod 65 will drive the magnetic ring 62 in the slide groove 61 without rotating relative to the drill rod 1. The magnetic force of the magnetic ring 62 will attract the magnetic force of the protective shell 31 in a circular manner, so that the protective shell 31 remains stable and motionless relative to the drill rod 1 in the accommodating chamber 2.

[0067] When the scintillation crystal plate 33 in a measuring cavity 321 measures the target formation position and the direction of the drill bit 11 needs to be adjusted, the transmission shaft 67 on one side of the target direction rotates to drive the sliding block 64 to move downward in the sliding groove 63, while the transmission shaft 67 on the other side of the target direction drives the sliding block 64 to move upward. At this time, the telescopic rod 65 on one side of the moving direction of the sliding block 64 will shrink, and the telescopic rod 65 on the other side of the moving direction of the sliding block 64 will pull the drill rod 1 to deflect the drill rod 1 toward the target direction because it is at the telescopic limit.

[0068] The implementation principle of the present invention is: (1): The gamma radiation released by the stratum will be captured by the scintillation crystal plate 33 and enter the scintillation crystal plate 33, interacting with the atoms inside the crystal, so that the atoms in the scintillation crystal plate 33 are excited to a higher energy level. Subsequently, these excited atoms will release photons when returning to a lower energy level. These photons are usually visible light or ultraviolet light fluorescence, causing the scintillation crystal plate 33 to produce a scintillation effect.

[0069] (2): The fluorescence will be refracted and converged toward the middle through the convex mirror glass 34 set in the measurement cavity 321. The convex mirror glass 34 is located on one side of the scintillation crystal plate. The scintillation crystal plate 33 in each measurement cavity 321 captures the gamma radioactive rays of the formation in the corresponding direction of measurement.

[0070] (3): The converged fluorescence will be refracted into the light guide rod 37. A light guide rod 38 is commonly provided at one end of several light guide rods 37. The fluorescence in several light guide rods 37 will enter the commonly connected light guide rod 38. The optical fiber amplifier 41 is doped with specific rare earth elements (such as erbium, ytterbium, etc.) and utilizes the amplification effect of these elements when stimulated by light to enhance the signal light, so that the fluorescence passing through the optical fiber amplifier 41 will be amplified and then enter the beam shaper 42 provided at the upper end of the light guide rod 38.

[0071] (4): The beam shaper 42 adjusts the divergence angle and intensity distribution of the light beam, utilizes the refraction and reflection characteristics of the lens or the reflector, changes the propagation path and shape of the light beam, and shapes the input light beam into the desired output light beam shape to emit the light beam.

[0072] (5): The light-transmitting areas 431 and light-blocking areas 432 circumferentially staggered on the filter ring 43 will continuously rotate alternately on the beam shaper 42, synchronizing the rotation frequency of the light-transmitting areas 431 with the frequency of the target formation. When the light beam emitted by the beam shaper 42 that is consistent with the rotation frequency of the light-transmitting area 431 can pass through the light-transmitting area 431 and be recorded by the photoelectric detection set in the photosensitive area 441, the light beam not belonging to the target formation will be blocked by the light-blocking area 432.

[0073] (6): The gamma radiation in the forward direction of the drill bit 11 will be captured by the curved crystal plate 46 and enter the scintillation crystal plate 33, interacting with the atoms inside the crystal, so that the atoms in the curved crystal plate 46 are excited to a higher energy level. Subsequently, when these excited atoms return to a lower energy level, they will release photons. These photons are usually visible light or ultraviolet light fluorescence, which causes the curved crystal plate 46 to produce a scintillation effect. The fluorescence will be refracted by the curved convex mirror 47 provided in the curved cover 45 and converged in the middle. The curved convex mirror 47 is refracted at the upper end of the curved crystal plate 46.

[0074] (7): The converged fluorescence will be refracted into the optical fiber 48 passing through the protective tube 36. The optical fiber 48 is connected to the arc convex mirror 47. The upper end of the optical fiber 48 passes through the upper end of the optical disc 44. The upper end of the optical fiber 48 is also provided with an optical fiber amplifier 41 and a beam shaper 42.

[0075] (8): By recording the frequency of the light beam emitted by the photoelectric detector, the optical signal can be converted into an electrical signal. These electrical signals contain the intensity and frequency information of the gamma rays. By analyzing these data, the radioactivity intensity and lithological characteristics of the formation can be inferred, thereby verifying the formation information of the drilling direction of the drill bit 11.

[0076] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A while-drilling azimuth gamma measurement device, comprising a drill rod (1), wherein a drill bit (11) is provided at one end of the drill rod (1), and wherein: The drill rod (1) is provided with a receiving chamber (2), and a measuring device (3) is arranged in the receiving chamber (2); The measuring device (3) comprises a protective shell (31) arranged in the accommodating cavity (2), a partition plate (32) being arranged in the protective shell (31), the partition plate (32) dividing the protective shell (31) into a plurality of circumferentially evenly distributed measuring cavities (321), and a scintillation crystal plate (33) being arranged outside the measuring cavity (321).

2. The azimuth gamma measurement device while drilling according to claim 1, characterized in that: A convex mirror glass (34) located on one side of the scintillation crystal plate is arranged in the measurement cavity (321), and a light blocking plate (35) is arranged on one side of the convex mirror glass (34).

3. The azimuth gamma measurement device while drilling according to claim 2, characterized in that: A protective tube (36) located between the plurality of measuring cavities (321) is arranged in the accommodating cavity (2); a plurality of light guide rods (37) connected to the convex mirror glass (34) are passed through the light blocking plate (35); and a light guide rod (38) located in the protective tube (36) is commonly arranged at one end of the plurality of light guide rods (37).

4. The azimuth gamma measurement device while drilling according to claim 3, characterized in that: A protective cover (39) is provided at the upper end of the protective shell (31), an isolation plate (391) is provided inside the protective cover (39), the isolation plate (391) divides the inside of the protective cover (39) into isolation cavities (392) corresponding one to one with the light guide rods (38), and the upper end of the light guide rod (38) passes through the isolation cavity (392).

5. The azimuth gamma measurement device while drilling according to claim 4, characterized in that: A filter (4) is arranged in the protective cover (39); The filter (4) comprises an optical fiber amplifier (41) arranged on a light guide rod (38), and a beam shaper (42) is arranged on the upper end of the light guide rod (38).

6. The azimuth gamma measurement device while drilling according to claim 5, characterized in that: A filter ring (43) located above the beam shaper (42) is rotatably arranged in the protective cover (39), and light-transmitting areas (431) and light-blocking areas (432) are staggeredly arranged circumferentially on the filter ring (43).

7. The azimuth gamma measurement device while drilling according to claim 5, characterized in that: A light-sensitive optical disc (44) located at the end of the filter ring (43) is arranged in the protective shell (31), and light-sensitive optical disc (44) is provided with light-sensitive areas (441) corresponding one to one with the light beam shaping.

8. The azimuth gamma measurement device while drilling according to claim 7, characterized in that: The lower end of the protective shell (31) is provided with an arc-shaped cover (45), and an arc-shaped crystal plate (46) is provided inside the arc-shaped cover (45); and an arc-shaped convex mirror (47) located at the upper end of the arc-shaped crystal plate (46) is provided inside the arc-shaped cover (45).

9. The azimuth gamma measurement device while drilling according to claim 8, characterized in that: A guide optical fiber (48) connected to the arc-shaped convex mirror (47) is provided in the protective tube (36), the upper end of the guide optical fiber (48) penetrates the upper end of the optical disc (44), and a fiber amplifier (41) and a beam shaper (42) are also provided at the upper end of the guide optical fiber (48).

10. The azimuth gamma measurement device while drilling according to claim 9, characterized in that: A drive shaft (49) is rotatably provided on the optical disc (44), a filter disc (5) located at the upper end of the optical fiber guide (48) is provided on the upper end of the drive shaft (49), and transparent areas (51) and light blocking areas (52) are staggeredly provided circumferentially on the filter disc (5).

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