Geosteering drilling system with while-drilling gamma measurement function

Abstract

The invention discloses a geosteering drilling system with a while-drilling gamma measurement function, and relates to the technical field of drilling systems, the drilling system comprises a drill bit, a drill rod, a detection device, a driving device and a supporting device, the drill bit is fixedly connected with the drill rod, the drill rod is connected with the detection device, the drill rod is connected with the driving device, and the driving device is connected with the supporting device. Before work is started, a drill rod needs to be connected with a drilling platform on the ground, the drilling platform provides power to control the drill rod to drive a drill bit to rotate, the supporting device provides acting force to enable the drill bit to continuously damage a rock stratum, and when the supporting device moves along with the drill rod, the underground wall face condition is detected through the detection device, and then according to the wall face condition, the drill bit is controlled to rotate. The driving device adjusts the position of the supporting device, the supporting device is prevented from colliding with the protrusion in the moving process, and meanwhile the situation that the supporting device is located near the pit, and the function of providing downward pressure for the drill bit cannot be achieved is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling systems, and specifically to a geosteering drilling system with a gamma measurement function while drilling. Background Art

[0002] In the process of modern oil and gas resource exploration and development, drilling operations, as a core link, directly affect the efficiency and economy of resource extraction.

[0003] Although traditional geosteering drilling systems can achieve basic downhole drilling functions, they face a series of problems under complex geological conditions. On the one hand, the downhole wellbore conditions are complex and variable, with irregular structures such as pits and protrusions. Existing drilling systems lack an efficient wellbore detection mechanism to detect the locations of protrusions and pits, and then adjust other devices to avoid collisions. On the other hand, when the drill bit encounters a hard rock formation, it is difficult to break through relying on the drilling pressure, and it is unable to provide additional force in a timely manner, resulting in slow drilling progress. Summary of the Invention

[0004] The purpose of the present invention is to provide a geosteering drilling system with a gamma measurement function while drilling to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: The drilling system includes a drill bit, a drill pipe, a detection device, a driving device, and a support device. The drill bit and the drill pipe are firmly connected. The drill pipe is connected to the detection device, the drill pipe is connected to the driving device, and the driving device is connected to the support device.

[0006] Before starting work, it is necessary to connect the drill pipe to the drilling platform on the ground, control the rotation of the drill pipe through the power provided by the drilling platform, drive the rotation of the drill bit through the rotation of the drill pipe, and make the drill bit break the underground rock formation through the rotation of the drill bit. At the same time, make the drill bit continue to rotate downward through the drilling pressure. When the drill bit encounters a hard rock formation that cannot be bypassed, the drilling pressure cannot provide enough pressure for the drill bit to advance. The support device provides a force to make the drill bit continuously break the rock formation. When the support device moves with the drill pipe, the detection device detects the downhole wall condition. When pits and protrusions are detected on the wall, the driving device adjusts the position of the support device to avoid collision between the support device and the protrusion during movement, and at the same time avoid the support device being near the pit and unable to provide downward pressure for the drill bit.

[0007] Furthermore, the drill pipe is provided with a first installation groove, a second installation groove, a first installation cavity, and a third installation groove. The detection device is placed in the first installation groove. The driving device is connected to the second installation groove. The support device is placed outside the drill pipe. The driving device is connected to the first installation cavity. The third installation groove is connected to the detection device.

[0008] The first installation groove and the third installation groove provided set provide an installation position and an installation basis for the detection device, the second installation groove and the first installation cavity provide an installation position and an installation basis for the driving device, and by arranging the supporting device on the outer side of the drill pipe, the supporting device can provide a supporting effect for the drill pipe so that the drill pipe can be in a central position, effectively preventing the drill pipe from shaking, thereby reducing the working efficiency of the drill bit.

[0009] Furthermore, the supporting device includes a connecting plate, an installation belt and a rotating rod. The connecting plate is rotatably connected to the rotating rod, the installation belt is slidably connected to the rotating rod, the installation belt is slidably connected to the connecting plate. A number of second installation cavities are provided in the connecting plate, a limiting element is provided in the second installation cavity, the limiting element is fixedly connected to the second installation cavity. A number of third installation cavities and installation holes are provided in the installation belt, the third installation cavities communicate with the installation holes, a supporting element is provided in the installation belt, the supporting element is connected to the third installation cavity, the supporting element is connected to the installation hole, and the connecting plate is connected to the driving device.

[0010] The connecting plate serves as an installation basis for the installation and support of other components. The second installation cavity provided provides an installation position for the limiting element, and the third installation cavity and the installation hole provide an installation position for the supporting element. When the drill bit advances, the installation belt can rotate along the rotating rod by contacting the wall surface and the installation belt. When the downward pressure required by the drill bit is insufficient, the rotation of the installation belt is restricted by the limiting element, and at the same time, an additional acting force is provided by the supporting element to provide an additional downward pressure for the drill bit so that the drill bit can continue to work.

[0011] Furthermore, the limiting element includes a limiting post, a limiting rod and a return spring. A limiting installation groove is provided on the limiting post, the return spring is placed in the limiting installation groove, the limiting rod is placed in the limiting installation groove, the limiting rod is rotatably connected to the limiting installation groove, the return spring is fixedly connected to the limiting rod, and one end of the return spring away from the limiting rod is fixedly connected to the limiting installation groove.

[0012] The limiting post serves as the main installation basis for the installation and positioning of other components. When the drill bit advances downward, the rotation of the installation belt drives the rotation of the limiting rod, the rotation of the limiting rod drives the return spring to be compressed in the limiting installation groove, and at the same time, when the installation belt continues to rotate, the limiting rod is reset by the return spring. When the installation belt rotates in the reverse direction, the reverse rotation of the installation belt is inhibited by the joint action of the limiting rod and the installation belt, so that the installation belt can provide a downward pressure for the drill bit.

[0013] Further, the support element includes a connection block, a connection spring, a mounting plate, a support nail, and a connection rope. The connection block is placed in the third installation cavity, and the connection block is tightly connected to the third installation cavity. There is a connection hole between the third installation cavity and the installation hole, and the third installation cavity and the installation hole are communicated through the connection hole. The connection block is tightly connected to the connection rope, and the connection rope is slidably connected to the connection hole. One end of the connection rope away from the connection block is connected to the mounting plate. The connection rope is placed inside the connection spring. There is an extension plate in the installation hole, and the connection spring is tightly connected to the extension plate. One end of the connection spring away from the extension plate is tightly connected to the mounting plate. The mounting plate is tightly connected to the support nail. The support nail is placed in the installation hole, and the support nail is tightly connected to the installation hole.

[0014] At the beginning, the connection spring is in a compressed state. When the drill bit cannot move forward downward, due to the vibration of the drill bit during work, the vibration of the drill bit drives the drill pipe to vibrate up and down. The up and down vibration of the drill pipe drives the installation belt to rotate, so that the limiting rod exerts a force on the connection block, causing the connection block to slide upward in the third installation cavity, thus making the connection rope move. The movement of the connection rope causes the connection spring to release elastic potential energy. The release of elastic potential energy by the connection spring causes the connection spring to exert a force on the mounting plate, so that the mounting plate moves. The movement of the mounting plate pushes the support nail to move, and finally the support nail contacts the well wall, increasing the friction between the support nail and the well wall. Through the friction and pressure provided by the support nail and the installation belt, an additional downward pressure is provided for the drill bit, enabling the drill bit to continue drilling downward, thus improving the working efficiency of the drill bit.

[0015] Further, the detection device includes a detection roller, a detection element, a detection coil, a detection spring, and a detection magnet. The detection roller is rotatably connected to the detection element. The detection spring is placed in the third installation groove. The detection element is tightly connected to the detection magnet. One end of the detection magnet away from the detection element is tightly connected to the detection spring. The detection coil is placed in the third installation groove. The detection device further includes a processor, and the processor is electrically connected to the detection coil. The processor is used to process the electrical signal of the detection coil.

[0016] There are several detection devices. When the drill bit drills downward, it contacts the wellbore through the detection roller, enabling the detection roller to roll along the wellbore. When the detection roller rolls to the pit area, the detection spring releases elastic potential energy to drive the detection magnet to move outward. The outward movement of the detection magnet drives the detection element to move. The movement of the detection element drives the detection roller to penetrate deeper into the pit. At the same time, the movement of the detection magnet causes the magnetic flux in the detection coil to change, generating an induced current. The processor records the position of the detection roller of the device where the induced current is generated, and then adjusts the position of the installation belt through the drive device to prevent the installation belt from being at the depression, so that it cannot play a supporting role. When the detection roller moves to the protrusion, the protrusion causes the detection roller to move towards the drill pipe. The movement of the detection roller drives the detection element to move. The movement of the detection element drives the detection magnet to move. The movement of the detection magnet causes the magnetic flux in the detection coil to change, generating an induced current. The processor records the position of the detection roller of the device where the induced current is generated, and then adjusts the position of the installation belt through the drive device to prevent the installation belt from being at the protrusion, so that the installation belt collides with the protrusion, causing the installation belt to be damaged.

[0017] Furthermore, the detection element includes a first detection block, a second detection block, a first reset block, and a second reset block. The first detection block and the second detection block are rotatably connected. The first detection block and the detection roller are rotatably connected. One end of the second detection block away from the first detection block is fixedly connected to the detection magnet. The first detection block and the first reset block are fixedly connected. There is a reset installation groove in the second reset block. There is a fixed spring in the reset installation groove. The first reset block is placed in the reset installation groove and is slidably connected to the reset installation groove. One end of the first reset block away from the reset installation groove is fixedly connected to the first detection block.

[0018] The first detection block serves as a connection basis for connecting with other components. Through the installation basis provided by the second reset block for the fixed spring, when the detection roller penetrates into the pit and the drill bit continues to advance at the same time, the advancement of the drill bit drives the second detection block to move. The movement of the second detection block drives the detection roller to move until the detection roller contacts the edge of the pit. The pit exerts a force on the detection roller, causing the detection roller to drive the first detection block to rotate. Through the rotation of the first detection block, the first reset block compresses the fixed spring in the reset installation groove. When the detection roller exits the pit, the compressed elastic potential energy of the fixed spring is released, causing the first reset block to rotate. The rotation of the first reset block drives the first detection block to rotate, thus resetting the detection roller.

[0019] Further, the driving device includes a driving cylinder, a rotating motor, a fixed gear, and an internal gear. The driving cylinder is placed in the second installation groove, the rotating motor is placed in the second installation groove, the fixed gear is placed in the first installation cavity, the driving cylinder is rotatably connected to the second installation groove, the output end of the driving cylinder is tightly connected to the connecting plate, the driving cylinder is tightly connected to the rotating motor, the output end of the rotating motor is tightly connected to the fixed gear, the internal gear is placed in the first installation cavity, the internal gear is tightly connected to the first installation cavity, and the internal gear meshes with the fixed gear.

[0020] When it is detected that there are depressions and protrusions on the well wall, the rotating motor outputs a rotational torque to drive the fixed gear to rotate. Through the meshing of the fixed gear and the internal gear, the fixed gear can rotate along the internal gear. By driving the driving cylinder to rotate as the fixed gear rotates along the internal gear, the installation belt is driven to move by the rotation of the driving cylinder, so that the installation belt can avoid the depression.

[0021] Further, a gamma measurement module and a power supply module are provided on the drill pipe.

[0022] The power supply module, as the main energy source, provides energy for the gamma measurement module. By detecting the radioactive element situation of the rock formation through the gamma measurement module, the resource situation of the rock formation can be judged.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The detection device configured in the system can accurately sense the positions of pits and protrusions on the well wall by detecting the contact rolling of the detection roller with the well wall and combining components such as the detection spring, detection magnet, and detection coil.

[0024] 2. When the detection device detects an abnormality, the driving device responds quickly. Through the meshing transmission of the fixed gear and the internal gear driven by the rotating motor, the driving cylinder flexibly adjusts the position of the support device, effectively avoiding the collision of the support device with the protrusion and falling into the pit, significantly improving the adaptability and safety of the drilling system in a complex well wall environment, reducing the risk of equipment damage, and ensuring the continuity of the drilling operation. 3. The limiting element and the supporting element in the support device work together. When the drill bit encounters a high-hardness rock formation and the conventional drilling pressure is insufficient, the limiting rod exerts a force on the connecting block, prompting the connecting spring to release elastic potential energy, pushing the support nail to closely contact the well wall, greatly increasing the friction force and downward pressure, providing a reliable additional drilling power for the drill bit, effectively solving the problem of hard rock drilling, significantly improving the drilling efficiency, and reducing the drilling operation time and cost. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the support device of the present invention; Figure 3 isFigure 2 Enlarged view of local part A; Figure 4 Schematic structural diagram of the driving device of the present invention; Figure 5 Schematic structural diagram of the detection device of the present invention; Figure 6 is Figure 5 Enlarged view of local part B; Figure 7 is Figure 5 Enlarged view of local part C.

[0025] In the figure: 1, drill bit; 2, drill pipe; 21, first installation groove; 22, second installation groove; 23, first installation cavity; 24, third installation groove; 3, detection device; 31, detection roller; 32, detection element; 321, first detection block; 322, second detection block; 323, first reset block; 324, second reset block; 3241, reset installation groove; 3242, fixing spring; 33, detection coil; 34, detection spring; 35, detection magnet; 4, driving device; 41, driving cylinder; 42, rotating motor; 43, fixed gear; 44, internal gear; 5, supporting device; 51, connecting plate; 511, second installation cavity; 52, installation belt; 521, third installation cavity; 522, installation hole; 5221, extension plate; 523, connecting hole; 53, rotating rod; 54, limiting element; 541, limiting column; 5411, limiting installation groove; 542, limiting rod; 543, reset spring; 55, supporting element; 551, connecting block; 552, connecting spring; 553, installation plate; 554, supporting nail; 555, connecting rope. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment: As Figures 1-7 shown, the present invention provides a technical solution for a geosteering drilling system with a gamma measurement while drilling function. The drilling system includes a drill bit 1, a drill pipe 2, a detection device 3, a driving device 4 and a supporting device 5. The drill bit 1 and the drill pipe 2 are tightly connected. The drill pipe 2 is connected to the detection device 3. The drill pipe 2 is connected to the driving device 4. The driving device 4 is connected to the supporting device 5.

[0028] Before starting work, the drill pipe 2 needs to be connected to the drilling platform on the ground. The power provided by the drilling platform is used to control the rotation of the drill pipe 2. The rotation of the drill pipe 2 drives the rotation of the drill bit 1. The rotation of the drill bit 1 enables the drill bit 1 to break the underground rock formation. At the same time, the drilling pressure makes the drill bit 1 continue to rotate downward. When the drill bit 1 encounters a rock formation with a relatively high hardness and cannot bypass it, the drilling pressure cannot provide enough pressure for the drill bit 1 to advance. The supporting device 5 provides a force to enable the drill bit 1 to continuously break the rock formation. When the supporting device 5 moves along with the drill pipe 2, the downhole wall condition is detected by the detection device 3. When pits and protrusions are detected on the wall surface, the position of the supporting device 5 is adjusted by the driving device 4 to prevent the supporting device 5 from colliding with the protrusions during movement, and at the same time, to prevent the supporting device 5 from being near the pit and unable to provide the downward pressure function for the drill bit 1.

[0029] As Figure 1 、 Figure 4 and Figure 7 shown, the drill pipe 2 is provided with a first installation groove 21, a second installation groove 22, a first installation cavity 23 and a third installation groove 24. The detection device 3 is placed in the first installation groove 21. The driving device 4 is connected to the second installation groove 22. The supporting device 5 is placed outside the drill pipe 2. The driving device 4 is connected to the first installation cavity 23. The third installation groove 24 is connected to the detection device 3.

[0030] The first installation groove 21 and the third installation groove 24 provided offer an installation position and an installation foundation for the detection device 3. The second installation groove 22 and the first installation cavity 23 provide an installation position and an installation foundation for the driving device 4. By arranging the supporting device 5 outside the drill pipe 2, the supporting device 5 can provide a supporting effect for the drill pipe 2, enabling the drill pipe 2 to be in the central position and effectively preventing the drill pipe 2 from shaking, thereby reducing the working efficiency of the drill bit 1.

[0031] As Figure 2 and Figure 3 shown, the supporting device 5 includes a connecting plate 51, an installation belt 52 and a rotating rod 53. The connecting plate 51 is rotatably connected to the rotating rod 53. The installation belt 52 is slidably connected to the rotating rod 53. The installation belt 52 is slidably connected to the connecting plate 51. A number of second installation cavities 511 are provided in the connecting plate 51. A limiting element 54 is provided in the second installation cavity 511 and is fixedly connected to the second installation cavity 511. A number of third installation cavities 521 and installation holes 522 are provided in the installation belt 52. The third installation cavities 521 are communicated with the installation holes 522. A supporting element 55 is provided in the installation belt 52. The supporting element 55 is connected to the third installation cavity 521 and is connected to the installation holes 522. The connecting plate 51 is connected to the driving device 4.

[0032] The connecting plate 51 serves as an installation base for the installation and support of other components. The second installation cavity 511 provided offers an installation position for the limiting element 54, and the third installation cavity 521 and the installation hole 522 provide an installation position for the supporting element 55. When the drill bit 1 advances, contact between the wall surface and the installation belt 52 allows the installation belt 52 to rotate along the rotating rod 53. When the downward pressure required by the drill bit 1 is insufficient, the limiting element 54 restricts the rotation of the installation belt 52, and simultaneously, the supporting element 55 provides an additional force to offer an extra downward pressure for the drill bit 1, enabling the drill bit 1 to continue operating.

[0033] As Figure 2 and Figure 3 shown, the limiting element 54 includes a limiting post 541, a limiting rod 542, and a return spring 543. The limiting post 541 is provided with a limiting installation groove 5411. The return spring 543 is placed within the limiting installation groove 5411. The limiting rod 542 is placed within the limiting installation groove 5411. The limiting rod 542 is rotatably connected to the limiting installation groove 5411. The return spring 543 is firmly connected to the limiting rod 542, and the end of the return spring 543 away from the limiting rod 542 is firmly connected to the limiting installation groove 5411.

[0034] The limiting post 541 serves as the main installation base for the installation and positioning of other components. When the drill bit 1 advances downward, the rotation of the installation belt 52 drives the rotation of the limiting rod 542. The rotation of the limiting rod 542 compresses the return spring 543 within the limiting installation groove 5411. Meanwhile, when the installation belt 52 continues to rotate, the return spring 543 causes the limiting rod 542 to reset. When the installation belt 52 rotates in the reverse direction, the combined action of the limiting rod 542 and the installation belt 52 inhibits the reverse rotation of the installation belt 52, enabling the installation belt 52 to provide a downward pressure for the drill bit 1.

[0035] As Figure 2 and Figure 3As shown, the support element 55 includes a connection block 551, a connection spring 552, a mounting plate 553, a support pin 554, and a connection rope 555. The connection block 551 is placed in the third installation cavity 521, and the connection block 551 is fixedly connected to the third installation cavity 521. There is a connection hole 523 between the third installation cavity 521 and the installation hole 522, and the third installation cavity 521 and the installation hole 522 are communicated through the connection hole 523. The connection block 551 is fixedly connected to the connection rope 555, and the connection rope 555 is slidably connected to the connection hole 523. One end of the connection rope 555 away from the connection block 551 is connected to the mounting plate 553. The connection rope 555 is placed inside the connection spring 552. There is an extension plate 5221 in the installation hole 522, and the connection spring 552 is fixedly connected to the extension plate 5221. One end of the connection spring 552 away from the extension plate 5221 is fixedly connected to the mounting plate 553. The mounting plate 553 is fixedly connected to the support pin 554. The support pin 554 is placed in the installation hole 522, and the support pin 554 is fixedly connected to the installation hole 522.

[0036] At the beginning, the connection spring 552 is in a compressed state. When the drill bit 1 cannot move forward downward, due to the vibration existing during the operation of the drill bit 1, the vibration of the drill bit 1 drives the drill pipe 2 to vibrate up and down. The up and down vibration of the drill pipe 2 drives the installation belt 52 to rotate, so that the limiting rod 542 exerts a force on the connection block 551, causing the connection block 551 to slide upward in the third installation cavity 521, thereby causing the connection rope 555 to move. The movement of the connection rope 555 causes the connection spring 552 to release elastic potential energy. The release of elastic potential energy by the connection spring 552 causes the connection spring 552 to exert a force on the mounting plate 553, causing the mounting plate 553 to move. The movement of the mounting plate 553 pushes the support pin 554 to move, and finally the support pin 554 contacts the well wall, thereby increasing the friction between the support pin 554 and the well wall. Through the friction and pressure provided by the support pin 554 and the installation belt 52, an additional downward pressure is provided for the drill bit 1, enabling the drill bit 1 to continue drilling downward, thus improving the working efficiency of the drill bit 1.

[0037] As Figures 5-7 As shown, the detection device 3 includes a detection roller 31, a detection element 32, a detection coil 33, a detection spring 34, and a detection magnet 35. The detection roller 31 is rotatably connected to the detection element 32. The detection spring 34 is placed in the third installation groove 24. The detection element 32 is fixedly connected to the detection magnet 35. One end of the detection magnet 35 away from the detection element 32 is fixedly connected to the detection spring 34. The detection coil 33 is placed in the third installation groove 24. The detection device 3 further includes a processor, and the processor is electrically connected to the detection coil 33. The processor is used to process the electrical signal of the detection coil 33.

[0038] There are several detection devices 3. When the drill bit 1 drills downward, the detection roller 31 contacts the wellbore wall, enabling the detection roller 31 to roll along the wellbore wall. When the detection roller 31 rolls to the pit area, the elastic potential energy is released by the detection spring 34 to drive the detection magnet 35 to move outward. The movement of the detection magnet 35 drives the detection element 32 to move. The movement of the detection element 32 drives the detection roller 31 to penetrate into the pit. At the same time, the movement of the detection magnet 35 causes the magnetic flux in the detection coil 33 to change, generating an induced current. The processor records the position of the detection roller 31 of the device where the induced current is generated, and then adjusts the position of the installation belt 52 through the driving device 4 to prevent the installation belt 52 from being in the depression, so that it cannot play a supporting role. When the detection roller 31 moves to the protrusion, the protrusion causes the detection roller 31 to move towards the drill pipe 2. The movement of the detection roller 31 drives the detection element 32 to move. The movement of the detection element 32 drives the detection magnet 35 to move. The movement of the detection magnet 35 causes the magnetic flux in the detection coil 33 to change, generating an induced current. The processor records the position of the detection roller 31 of the device where the induced current is generated, and then adjusts the position of the installation belt 52 through the driving device 4 to prevent the installation belt 52 from being in the protrusion, so that the installation belt 52 collides with the protrusion, resulting in damage to the installation belt 52.

[0039] As Figures 5-7 shown, the detection element 32 includes a first detection block 321, a second detection block 322, a first reset block 323 and a second reset block 324. The first detection block 321 and the second detection block 322 are rotatably connected. The first detection block 321 and the detection roller 31 are rotatably connected. One end of the second detection block 322 away from the first detection block 321 is fixedly connected to the detection magnet 35. The first detection block 321 and the first reset block 323 are fixedly connected. The second reset block 324 is provided with a reset installation groove 3241. A fixed spring 3242 is provided in the reset installation groove 3241. The first reset block 323 is placed in the reset installation groove 3241. The first reset block 323 is slidably connected to the reset installation groove 3241. One end of the first reset block 323 away from the reset installation groove 3241 is fixedly connected to the first detection block 321.

[0040] The first detection block 321 serves as a connection basis for connecting with other components. Through the installation basis provided by the second reset block 324 for the fixing spring 3242, when the detection roller 31 penetrates into the pit, and at the same time when the drill bit 1 continues to advance, by the continuous advancement of the drill bit 1, the second detection block 322 is driven to move by the advancement of the drill bit 1. The detection roller 31 is driven to move by the movement of the second detection block 322 until the detection roller 31 contacts the edge of the pit. The pit exerts a force on the detection roller 31, so that the detection roller 31 drives the first detection block 321 to rotate. By the rotation of the first detection block 321, the first reset block 323 compresses the fixing spring 3242 in the reset installation groove 3241. When the detection roller 31 disengages from the pit, the first reset block 323 rotates by the elastic potential energy released by the fixing spring 3242. The first detection block 321 is driven to rotate by the rotation of the first reset block 323, so that the detection roller 31 is reset.

[0041] As Figure 4 shown, the driving device 4 includes a driving cylinder 41, a rotating motor 42, a fixed gear 43 and an internal gear 44. The driving cylinder 41 is placed in the second installation groove 22, the rotating motor 42 is placed in the second installation groove 22, the fixed gear 43 is placed in the first installation cavity 23. The driving cylinder 41 is rotatably connected to the second installation groove 22. The output end of the driving cylinder 41 is fixedly connected to the connecting plate 51. The driving cylinder 41 is fixedly connected to the rotating motor 42. The output end of the rotating motor 42 is fixedly connected to the fixed gear 43. The internal gear 44 is placed in the first installation cavity 23. The internal gear 44 is fixedly connected to the first installation cavity 23. The internal gear 44 meshes with the fixed gear 43.

[0042] When depressions and protrusions are detected on the well wall, the rotating motor 42 outputs a rotational torque to drive the fixed gear 43 to rotate. Due to the meshing of the fixed gear 43 and the internal gear 44, the fixed gear 43 can rotate along the internal gear 44. The driving cylinder 41 is driven to rotate by the rotation of the fixed gear 43 along the internal gear 44. The installation belt 52 is driven to move by the rotation of the driving cylinder 41, so that the installation belt 52 avoids the depression.

[0043] As Figure 1 shown, a gamma measurement module and a power supply module are provided on the drill pipe 2.

[0044] The power supply module, as the main energy source, provides energy for the gamma measurement module. The gamma measurement module detects the radioactive element situation of the rock formation, so as to judge the resource situation of the rock formation.

[0045] Working principle of the present invention: The detection device 3 detects whether there are protrusions and pits on the wellbore position. Then, according to the positions of the pits and protrusions, the driving device 4 adjusts the position of the mounting belt 52 to prevent the mounting belt 52 from being damaged. When the drill bit 1 needs additional downward pressure to work, a force is generated on the connecting block 551 through the limiting rod 542, so that the connecting block 551 slides upward in the third mounting cavity 521, thereby causing the connecting rope 555 to move. By the movement of the connecting rope 555, the connecting spring 552 releases elastic potential energy. By the release of the elastic potential energy of the connecting spring 552, the connecting spring 552 generates a force on the mounting plate 553, so that the mounting plate 553 moves. By the movement of the mounting plate 553, the supporting nail 554 is pushed to move, and finally the supporting nail 554 contacts the wellbore, thereby increasing the friction between the supporting nail 554 and the wellbore. Through the friction and pressure provided by the supporting nail 554 and the mounting belt 52, an additional downward pressure is provided for the drill bit 1 to enable the drill bit 1 to continue drilling downward. When the detection roller 31 sinks into the pit, as the drill bit 1 continues to advance, the second detection block 322 is driven to move by the advancement of the drill bit 1. By the movement of the second detection block 322, the detection roller 31 is driven to move until the detection roller 31 contacts the edge of the pit. By the pit generating a force on the detection roller 31, the detection roller 31 drives the first detection block 321 to rotate. By the rotation of the first detection block 321, the first reset block 323 compresses the fixed spring 3242 in the reset mounting groove 3241. When the detection roller 31 disengages from the pit, the first reset block 323 rotates by the release of the compressed elastic potential energy of the fixed spring 3242. By the rotation of the first reset block 323, the first detection block 321 is driven to rotate, so that the detection roller 31 is reset.

[0046] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A geosteering drilling system with a gamma measurement while drilling function, characterized in that: The described drilling system includes a drill bit (1), a drill pipe (2), a detection device (3), a driving device (4), and a support device (5). The drill bit (1) and the drill pipe (2) are firmly connected. The drill pipe (2) is connected to the detection device (3). The drill pipe (2) is connected to the driving device (4). The driving device (4) is connected to the support device (5).

2. The geosteering drilling system with the function of measuring gamma while drilling according to claim 1, characterized in that: The drill pipe (2) is provided with a first installation groove (21), a second installation groove (22), a first installation cavity (23), and a third installation groove (24). The detection device (3) is placed in the first installation groove (21). The driving device (4) is connected to the second installation groove (22). The support device (5) is placed outside the drill pipe (2). The driving device (4) is connected to the first installation cavity (23). The third installation groove (24) is connected to the detection device (3).

3. A geosteering drilling system with a gamma measurement while drilling function according to claim 2, characterized in that: The support device (5) includes a connecting plate (51), an installation belt (52), and a rotating rod (53). The connecting plate (51) is rotatably connected to the rotating rod (53). The installation belt (52) is slidably connected to the rotating rod (53). The installation belt (52) is slidably connected to the connecting plate (51). A number of second installation cavities (511) are provided in the connecting plate (51). A limiting element (54) is provided in the second installation cavity (511). The limiting element (54) is firmly connected to the second installation cavity (511). A number of third installation cavities (521) and installation holes (522) are provided in the installation belt (52). The third installation cavity (521) is communicated with the installation hole (522). A support element (55) is provided in the installation belt (52). The support element (55) is connected to the third installation cavity (521). The support element (55) is connected to the installation hole (522). The connecting plate (51) is connected to the driving device (4).

4. The geosteering drilling system with the function of measuring gamma while drilling according to claim 3, wherein: The limiting element (54) includes a limiting column (541), a limiting rod (542), and a return spring (543). A limiting installation groove (5411) is provided on the limiting column (541). The return spring (543) is placed in the limiting installation groove (5411). The limiting rod (542) is placed in the limiting installation groove (5411). The limiting rod (542) is rotatably connected to the limiting installation groove (5411). The return spring (543) is firmly connected to the limiting rod (542). One end of the return spring (543) away from the limiting rod (542) is firmly connected to the limiting installation groove (5411).

5. The geological steering drilling system with the function of gamma measurement while drilling according to claim 4, characterized in that: The support element (55) includes a connection block (551), a connection spring (552), a mounting plate (553), a support pin (554), and a connection rope (555). The connection block (551) is placed in the third installation cavity (521), and the connection block (551) is fixedly connected to the third installation cavity (521). There is a connection hole (523) between the third installation cavity (521) and the installation hole (522), and the third installation cavity (521) communicates with the installation hole (522) through the connection hole (523). The connection block (551) is fixedly connected to the connection rope (555), and the connection rope (555) is slidably connected to the connection hole (523). One end of the connection rope (555) away from the connection block (551) is connected to the mounting plate (553). The connection rope (555) is placed inside the connection spring (552). There is an extension plate (5221) in the installation hole (522), and the connection spring (552) is fixedly connected to the extension plate (5221). One end of the connection spring (552) away from the extension plate (5221) is fixedly connected to the mounting plate (553). The mounting plate (553) is fixedly connected to the support pin (554), and the support pin (554) is placed in the installation hole (522), and the support pin (554) is fixedly connected to the installation hole (522).

6. The geosteering drilling system with the function of gamma measurement while drilling according to claim 2, wherein: The detection device (3) includes a detection roller (31), a detection element (32), a detection coil (33), a detection spring (34), and a detection magnet (35). The detection roller (31) is rotatably connected to the detection element (32). The detection spring (34) is placed in the third installation groove (24). The detection element (32) is fixedly connected to the detection magnet (35). One end of the detection magnet (35) away from the detection element (32) is fixedly connected to the detection spring (34). The detection coil (33) is placed in the third installation groove (24). The detection device (3) further includes a processor, and the processor is electrically connected to the detection coil (33). The processor is used to process the electrical signal of the detection coil (33).

7. A geosteering drilling system with a gamma measurement while drilling function according to claim 6, characterized in that: The detection element (32) includes a first detection block (321), a second detection block (322), a first reset block (323) and a second reset block (324). The first detection block (321) and the second detection block (322) are rotatably connected. The first detection block (321) and the detection roller (31) are rotatably connected. One end of the second detection block (322) away from the first detection block (321) is fixedly connected to the detection magnet (35). The first detection block (321) and the first reset block (323) are fixedly connected. A reset installation groove (3241) is provided in the second reset block (324). A fixing spring (3242) is provided in the reset installation groove (3241). The first reset block (323) is placed in the reset installation groove (3241). The first reset block (323) is slidably connected to the reset installation groove (3241). One end of the first reset block (323) away from the reset installation groove (3241) is fixedly connected to the first detection block (321).

8. The geosteering drilling system with the function of gamma measurement while drilling according to claim 2, characterized in that: The driving device (4) includes a driving cylinder (41), a rotating motor (42), a fixed gear (43) and an internal gear (44). The driving cylinder (41) is placed in the second installation groove (22). The rotating motor (42) is placed in the second installation groove (22). The fixed gear (43) is placed in the first installation cavity (23). The driving cylinder (41) is rotatably connected to the second installation groove (22). The output end of the driving cylinder (41) is fixedly connected to the connecting plate (51). The driving cylinder (41) and the rotating motor (42) are fixedly connected. The output end of the rotating motor (42) is fixedly connected to the fixed gear (43). The internal gear (44) is placed in the first installation cavity (23). The internal gear (44) is fixedly connected to the first installation cavity (23). The internal gear (44) meshes with the fixed gear (43).

9. The geosteering drilling system with the function of gamma measurement while drilling according to claim 2, wherein: A gamma measurement module and a power supply module are provided on the drill pipe (2).

Images