Underground data acquisition device for oil and gas well

Abstract

The invention relates to the technical field of well drilling, in particular to an oil and gas well downhole data acquisition device which comprises a connecting cylinder and an emitter, a cylinder with two closed ends is rotatably arranged at the end of the connecting cylinder, the emitter is arranged in the cylinder, a motor is placed in the connecting cylinder, and the output end of the motor movably penetrates through the connecting cylinder and then is connected with the cylinder. A support for containing air cylinders is arranged in the barrel body, the two ends of the support are fixedly connected with the bottom and the top of the barrel body respectively, the support is sequentially provided with at least three containing frames from bottom to top, the air cylinders are installed in the containing frames, each air cylinder is connected with a plate body assembly, containing holes are formed in the barrel body, and the air cylinders drive the plate body assemblies to move in the containing holes. And a plurality of sensors are embedded in the plate body assembly. The method and the device are used for solving the technical problem that an existing data acquisition device is generally independent of a measurement system design and cannot be combined with a high-precision full-circumferential measurement requirement in a variable-diameter shaft environment, so that the data acquisition and transmission collaboration is insufficient.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and specifically relates to a downhole data acquisition device for oil and gas wells. Background Art

[0002] After the completion of oil and gas wells, reservoir evaluation and perforation optimization rely on accurate downhole data acquisition. However, existing measurement technologies have significant limitations. Firstly, although conventional full - circumference measurement can quickly obtain the overall data of the formation around the wellbore, its resolution is low, making it difficult to accurately identify thin layers, micro - fractures, or heterogeneous reservoir characteristics, resulting in sub - optimal selection of perforation positions and affecting the final production. On the other hand, while high - resolution directional measurement can provide local data with millimeter - level accuracy, its detection range is limited, and it can only obtain formation information in a certain direction, unable to comprehensively reflect the formation characteristics around the wellbore.

[0003] In addition, the formations encountered during drilling usually include complex geological conditions such as high - pressure layers, low - pressure layers, easily caving layers, or quicksand layers. Different - diameter casings need to be run in to isolate the risk intervals, forming a variable - diameter wellbore structure. Existing external probes are prone to interference from wellbore steps and sudden diameter changes when moving in a variable - diameter wellbore, resulting in decreased measurement stability, limited passability, and even possible instrument jamming. At the same time, the real - time transmission of downhole data also faces challenges. The traditional cable transmission method is limited by the complex wellbore structure, high - temperature and high - pressure environment, and long - term monitoring requirements, with risks such as signal attenuation and cable damage, affecting the reliability and efficiency of data transmission. The wireless electromagnetic transmission technology can effectively avoid these problems and achieve high - speed and stable transmission of downhole data through electromagnetic wave signals, especially suitable for complex well conditions. However, existing data acquisition devices are usually designed independently of the measurement system and fail to combine with the high - precision full - circumferential measurement requirements in a variable - diameter wellbore environment, resulting in insufficient coordination between data acquisition and transmission and affecting the overall operation efficiency. Therefore, there is an urgent need for an integrated solution for downhole data acquisition and wireless transmission optimized for variable - diameter wellbores in the current technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a downhole data acquisition device for oil and gas wells, aiming to solve the technical problem that existing data acquisition devices are usually designed independently of the measurement system and fail to combine with the high - precision full - circumferential measurement requirements in a variable - diameter wellbore environment, resulting in insufficient coordination between data acquisition and transmission and affecting the overall operation efficiency.

[0005] The present invention is achieved through the following technical solutions: An underground data acquisition device for oil and gas wells, comprising a connecting cylinder and a transmitter. A cylinder with both ends closed is rotatably arranged at the end of the connecting cylinder, and the transmitter is arranged inside the cylinder. A motor is placed inside the connecting cylinder, and the output end of the motor movably penetrates through the connecting cylinder and is connected to the cylinder. A bracket for placing cylinders is arranged inside the cylinder, and both ends of the bracket are fixedly connected to the bottom and top of the cylinder respectively. At least three placement racks are arranged on the bracket from bottom to top in sequence. Cylinders are installed in the placement racks, and each cylinder is connected with a plate body assembly. The cylinder body is provided with placement holes equal in number to the cylinders. The cylinder drives the plate body assembly to move in the placement holes, and a number of sensors are embedded in the plate body assembly. Through the cylinders arranged in this application, the plate body assembly is moved from the placement hole towards the well wall. After detecting the data in the corresponding direction, it rotates to the next detection position through the motor and operates again. And by accommodating all the detected components inside the cylinder and performing detection through the rotating cylinder, the technical problem of realizing high-precision, full-circumference, and stable underground data acquisition and wireless transmission in a variable-diameter wellbore environment is solved, so as to overcome the deficiencies of the existing measurement methods, ensure the precise optimization of the perforation position, and ultimately improve the oil and gas well production and development efficiency.

[0006] Further, the plate body assembly includes a connecting plate and a number of detection plates. The sensors are distributed on each detection plate. The number of detection plates are sequentially hinged at the head and tail. The two ends of the connecting plate are respectively connected with rotating rods through torsion springs. The two rotating rods are respectively connected to the two detection plates at the head and tail of the head-to-tail hinge. And in the initial state, a preset gap is provided between each detection plate and the connecting plate. Such a setting enables the detection plates to form a chain-like flexible structure through head-to-tail hinge. When encountering a protrusion, the hinge can be locally bent to avoid it; when encountering a depression, the torsion spring pushes the rotating rod, so that the detection plate extends towards the well wall within the preset gap range to fit the well wall as much as possible and reduce the detection blind area.

[0007] Further, a number of telescopic rods equal in number to the detection plates are arranged on the connecting plate. In the initial state, each telescopic rod is aligned with each detection plate, and the telescopic rod is located in the gap between the connecting plate and the detection plate. It helps to keep the contact pressure between the detection plate and the well wall and reduce the detection blind area caused by the uneven well wall. When the slope between the protrusions and depressions is relatively large, the telescopic rod can compensate for the height difference through elastic expansion and contraction.

[0008] Further, a number of flexible support blocks are also arranged on the connecting plate. Each flexible support block is located between two adjacent telescopic rods. In the initial state, the flexible support block is in contact with the detection plate. Arranging the flexible support blocks can play a certain supporting role for the detection plates, so that the detection plates are in contact with the well wall in a vertical state. Then it can not only measure when the well wall is flat, but also measure when there are protrusions and depressions on the well wall by adapting the bending path through the articulated split detection plates.

[0009] Furthermore, a number of telescopic plates and a number of detection plates are hinged one by one.

[0010] Furthermore, fixing plates are respectively arranged at the top end and the bottom end of the inner wall of the cylinder body. Both ends of the bracket are respectively fixed on the two fixing plates. First chutes corresponding to the number of placement holes are arranged on the two fixing plates. Support plates are respectively connected to both ends of the connecting plate. The support plates are slidably arranged in the first chutes through sliders. This greatly reduces the force on the cylinder.

[0011] Furthermore, mounting grooves are formed in the support plates. Second chutes are arranged on the opposite side walls of the mounting grooves. Both sides of the sliding plate are slidably arranged in the second chutes. The connecting plate is connected to the support plate through the sliding plate. This can make the extended distance farther.

[0012] Furthermore, elastic sealing rings are arranged on the inner edges of the placement holes. This protects the inside of the cylinder body from being polluted as much as possible.

[0013] Furthermore, buffer pads are arranged at the ends of the first chutes. This prevents the support plates from having hard collisions with the ends of the chutes and protects the integrity of the mechanism.

[0014] Furthermore, the angles of a number of placement holes are arranged at intervals. The measurement intervals in each direction are the same, ensuring data coherence.

[0015] Furthermore, the flexible support blocks are silicone foam.

[0016] Furthermore, the cylinders are all horizontally arranged.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. Through the arrangement of the cylinders, motors and plate body assemblies in this application, the cylinders drive the plate body assemblies to contact the well wall. After the contact is completed, the motors rotate for detection at the next position, and the cylinders, motors and plates are all gathered in a cylinder body. By accommodating all the detection components in the cylinder body, it solves the technical problem that the existing data acquisition devices are usually designed independently of the measurement system and fail to be combined with the high-precision circumferential measurement requirements in the variable-diameter wellbore environment, resulting in insufficient coordination of data acquisition and transmission and affecting the overall operation efficiency. 2. Through the improvement of the lower part of the plate body assembly in this application, the plate body assembly includes a number of hinged detection plates. Such an arrangement enables the detection plates to form a chain-like flexible structure through head-to-tail hinging. When encountering a protrusion, the hinged part can be locally bent to avoid it. When encountering a depression, the torsion spring pushes the rotating rod, so that the detection plates extend towards the well wall within the preset gap range, as close to the well wall as possible, reducing the detection blind area. 3. In this application, by setting telescopic rods and flexible support blocks between adjacent telescopic rods, measurement can be carried out when the wellbore is flat, and when there are unevenness on the wellbore, the articulated split detection plate can adapt to the curved path for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings: Figure 1 is a schematic structural diagram of the overall structure of the present invention inside the well; Figure 2 is a schematic structural diagram of the plate body assembly in Embodiment 1 of the present invention; Figure 3 is a schematic structural diagram of the cylinder driving the connecting plate to move out of the placement hole in Embodiment 2 of the present invention; Figure 4 is a schematic structural diagram of the cylinder driving the connecting plate back into the cylinder body in Embodiment 2 of the present invention; Figure 5 is a schematic structural diagram of the detection plate in contact with the wellbore of the present invention; Figure 6 is a schematic structural diagram of the sliding plate and the support plate sliding relative to each other in Embodiment 3 of the present invention; Figure 7 is the first gap state in Embodiment 2 of the present invention; Figure 8 is the second gap state in Embodiment 2 of the present invention.

[0019] Markings in the drawings and corresponding component names: 1 - connecting cylinder; 2 - cylinder body; 3 - motor; 4 - cylinder; 5 - bracket; 6 - placement rack; 7 - connecting plate; 8 - detection plate; 9 - rotating rod; 10 - gap; 11 - telescopic rod; 12 - flexible support block; 13 - fixing plate; 14 - first chute; 15 - support plate; 16 - installation groove; 17 - sliding plate; 18 - plate body assembly; 19 - placement hole; 21 - first detection plate; 22 - second detection plate; 23 - third detection plate; 24 - fourth detection plate; 25 - fifth detection plate; 26 - sixth detection plate; 27 - gap I; 28 - gap II; 29 - gap III; 30 - gap IV; 31 - gap V; 32 - gap VI; D1 - first direction; D2 - second direction. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not constitute a limitation to the present invention.

[0021] Embodiment 1: The formations commonly drilled at present include complex geological conditions such as high-pressure layers, low-pressure layers, easily caving layers or quicksand layers. It is necessary to lower casings with different diameters to isolate the risk intervals and form a variable-diameter wellbore structure. However, when the existing external probes move in the variable-diameter wellbore, they are easily interfered by wellbore steps, sudden diameter changes, etc., resulting in a decline in measurement stability, limited passability, and even possible jamming of the instrument.

[0022] As Figure 1 and Figure 2 shown, the connecting cylinder 1 provided in the present application has one end connected to the oil cylinder, and the other end of the connecting cylinder 1 is rotatably provided with a cylinder body 2 with both ends closed. A motor 3 is placed in the connecting cylinder 1, and the output end of the motor 3 movably penetrates through the connecting cylinder 1 and is connected to the cylinder body 2. The motor 3 can drive the cylinder body 2 to rotate on the connecting cylinder 1. A bracket 5 for placing a cylinder 4 is provided in the cylinder body 2. Both ends of the bracket 5 are fixedly connected to the bottom and top of the cylinder body 2 respectively. At least three placement frames 6 are sequentially arranged on the bracket 5 from bottom to top. A cylinder 4 is installed in the placement frame 6. Each cylinder 4 is connected to a plate body assembly 18. Placement holes 19 with the same number as the cylinders 4 are provided on the cylinder body 2. The cylinder 4 drives the plate body assembly 18 to move in the placement holes 19, and a number of sensors are embedded in the plate body assembly 18. A transmitter is also provided in the cylinder body 2. The transmitter of the present application can be set at any position of the cylinder body 2, and the installation position of the transmitter is not specifically limited.

[0023] It should be noted that an elastic sealing ring is provided at the inner edge of the placement hole 19.

[0024] It should be noted that the cylinders 4 are all horizontally arranged It should be noted that the angles of the plurality of placement holes 19 are arranged at intervals.

[0025] The specific working principle of this Embodiment 1 is as follows: After the cylinder body 2 has reached the specified target layer, the control system starts each cylinder 4 to drive the plate assembly 18 to move outward toward the placement hole 19. Until after the cylinder 4 drives the plate assembly 18 to come into contact with the well wall, if the pressure sensor embedded on one of the plate assemblies 18 senses pressure, the control system stops the operation of the cylinder 4 of the corresponding plate assembly 18, and the same is true for the remaining plate assemblies 18. When all the plate assemblies 18 have come into contact with the well wall, at this time, the sensors for detecting other data in the oil and gas well on the plate assembly 18 start to work. The sensors transmit the data to the transmitter, and the transmitter then wirelessly transmits the formation parameters collected by the downhole sensors to the ground receiving system. Then the ground receiving system receives the data detected in the direction where the current plate assembly 18 is facing. At this time, the control system retracts the cylinder 4 again, which can be retracted to the initial position or preset to retract a certain distance to facilitate the subsequent rotation of the cylinder body 2 and prevent friction with the well wall; After the cylinder 4 is completely retracted, the control system immediately triggers the motor 3 to rotate the cylinder body 2 to the next detection orientation. Since the cylinder body 2 and the connecting cylinder 1 are rotatably arranged, the motor 3 drives the cylinder body 2 to rotate on the connecting cylinder 1. After the cylinder body 2 rotates to the specified angle, the operation is carried out again as described above. The control system starts each cylinder 4 to drive the plate assembly 18 to move outward toward the placement hole 19 until the cylinder body 2 has detected all the detection data around the well wall. This application solves the technical problem that the existing data acquisition devices are usually designed independently of the measurement system and fail to be combined with the high-precision full-circumferential measurement requirements in the variable-diameter wellbore environment, resulting in insufficient coordination of data acquisition and transmission and affecting the overall operation efficiency by accommodating all the detection components in the cylinder body 2 and performing detection through the rotating cylinder body 2.

[0026] Here, it should be mentioned that the placement rack 6 adopts a split-ring design and is connected by two symmetric half-rings through a quick snap mechanism. During installation, the half-rings are opened and then horizontally placed into the cylinder 4, and then the snap is closed and locked to ensure that the axis of the cylinder 4 is parallel and fixed to the center line of the cylinder body 2. This structure can realize the quick disassembly and assembly of the cylinder 4 and at the same time ensure that all the cylinders 4 are horizontally and directionally arranged in the placement rack 6.

[0027] Here, it should be mentioned that an angle sensor is installed on the cylinder body 2 or the connecting cylinder 1 to monitor the rotation angle of the cylinder body 2 in real time. When the motor 3 drives the cylinder body 2 to rotate, the angle sensor records the current rotation angle of the cylinder body 2 relative to the initial position. Before starting, a reference direction is determined through the ground control system as the zero point of angle measurement, and finally, it is possible to determine the best position for perforation in which direction of the well wall.

[0028] Here, it should be mentioned that when the well wall is relatively flat, the plate assembly 18 can be set as an integrally formed plate.

[0029] Example 2: On the basis of Example 1, there is another implementation method.

[0030] During the drilling process, the soft formation is prone to being over-cut by the drill bit, resulting in hole enlargement, and the hard formation is prone to hole shrinkage or protrusion due to drill bit slippage or insufficient fragmentation. Therefore, the wellbore after drilling will be uneven. For a relatively flat wellbore, an integrally formed plate can be used for contact detection. However, for an uneven wellbore, the protrusions will have a certain obstructive effect on the plate assembly 18, and in the sunken areas, the plate assembly 18 cannot fully contact the wellbore in the sunken areas, resulting in inaccurate data collection.

[0031] As Figures 3 to 5 shown, the plate assembly 18 in the present application includes a connecting plate 7 and a plurality of detection plates 8. Sensors are distributed on each detection plate 8. The plurality of detection plates 8 are sequentially hinged head to tail. The two ends of the connecting plate 7 are respectively connected with rotating rods 9 by torsion springs. The two rotating rods 9 are respectively connected to the two detection plates 8 at the two ends of the head-to-tail hinge. And in the initial state, a gap 10 is preset between each detection plate 8 and the connecting plate 7. Such a setting can enable the detection plates 8 to form a chain-like flexible structure through head-to-tail hinge. When encountering a protrusion, the hinge can be locally bent and avoided; when encountering a sunken area, the torsion spring pushes the rotating rod 9, so that the detection plate 8 extends towards the wellbore within the preset gap 10 range, and fits the wellbore as much as possible, reducing the detection blind area.

[0032] It should be mentioned here that the head-to-tail hinge means that the head and tail of adjacent detection plates 8 are connected by a hinge to form a relatively rotatable joint. Each detection plate 8 is connected in this way; the head-to-tail hinge method can adapt to a curved path.

[0033] It should be mentioned here that the purpose of setting the gap 10 is to reserve a deformation space and prevent interference between adjacent detection plates 8. Reserving a deformation space provides a moving space for the relative rotation of adjacent detection plates 8.

[0034] It should be noted that a plurality of telescopic rods 11 equal in number to the detection plates 8 are provided on the connecting plate 7. In the initial state, each telescopic rod 11 is aligned with each detection plate 8, and the telescopic rod 11 is located in the gap 10 between the connecting plate 7 and the detection plate 8.

[0035] It should be noted here that the telescopic rod 11 includes an outer sleeve and an inner sleeve. The inner sleeve is sleeved on the inner wall of the outer sleeve. The inner wall of the outer sleeve is connected to the outer wall of the inner sleeve by a compression spring. In the sunken area, the spring pushes the inner sleeve to extend outwards, assisting the detection plate 8 to maintain the contact pressure with the wellbore and reducing the detection blind area caused by the uneven wellbore.

[0036] It should be noted that a number of flexible support blocks 12 are also provided on the connecting plate 7. Each flexible support block 12 is located between two adjacent telescopic rods 11. In the initial state, the flexible support block 12 is in contact with the detection plate 8. The purpose of setting the flexible support block 12 is to be able to play a certain supporting role for the detection plate 8, so that a number of detection plates 8 are in contact with the wellbore in a vertical state, instead of setting the plate assembly 18 in Embodiment 1 as an integrally formed plate body. When there are unevenness on the wellbore, the articulated split detection plate 8 is used to adapt to the curved path, and since the flexible support block 12 is flexible, it will not cause a large obstruction to the detection plate 8.

[0037] It should be noted that a number of telescopic plates are hinged to a number of detection plates 8 one by one.

[0038] It should be noted that the flexible support block 12 is a silicone foam.

[0039] When the detection plate 8 contacts the uneven wellbore, the gap 10 will appear in two states, which are represented by the first gap state and the second gap state in this application.

[0040] As Figure 7 shown, the first gap state (when encountering a protrusion): The detection plate 8 at the protrusion part is squeezed by the wellbore. For the sake of easy understanding, the detection plate 8 in contact with the protrusion part is described as the first detection plate 21 here, that is, it is described with the first detection plate 21 as the center: The two ends of the first detection plate 21 are respectively hinged with a second detection plate 22 and a third detection plate 23, and the second detection plate 22 and the third detection plate 23 also closely adhere to the wellbore. The first detection plate 21, the second detection plate 22, and the third detection plate 23 respectively correspond to a gap Ⅰ27, a gap Ⅱ28, and a gap Ⅲ29. When the first detection plate 21 contacts the protrusion, due to the blockage of the protrusion, the first detection plate 21 cannot move forward, and the wellbore around the protrusion area is relatively sunken, while the second detection plate 22 and the third detection plate 23 will bend towards the second direction D2 due to the sunken trend of the wellbore. At this time, the gap Ⅰ27 corresponding to the first detection plate 21 is in a compressed state, so the value of its gap Ⅰ27 is smaller than the values of the gaps Ⅱ28 and Ⅲ29 corresponding to the second detection plate 22 and the third detection plate 23.

[0041] In order to enable the second detection plate 22 and the third detection plate 23 to fit the sunken wellbore, the connecting plate 7 will continue to move, and a thrust will be applied to the second detection plate 22 and the third detection plate 23 through the telescopic rod 11 until they are in full contact with the wellbore. During this process, since the first detection plate 21 has been blocked by the protrusion, the telescopic rod 11 will be squeezed, further compressing the gap Ⅰ27 of the first detection plate 21. Finally, the gap Ⅰ27 of the first detection plate 21 will be significantly smaller than the gaps Ⅱ28 and Ⅲ29 of the second detection plate 22 and the third detection plate 23.

[0042] Second gap state (when encountering a depression): This part is the detection plate 8 corresponding to the depression part. For the convenience of understanding, the detection plate 8 in contact with the depression part is described by the fourth detection plate 24 here, that is, the description is centered on the fourth detection plate 24: The two ends of the fourth detection plate 24 are respectively hinged with a fifth detection plate 25 and a sixth detection plate 26. The fourth detection plate 24, the fifth detection plate 25 and the sixth detection plate 26 respectively correspond to a gap Ⅳ30, a gap Ⅴ31 and a gap Ⅵ32. Since the wellbore wall around the depression area is relatively convex, when the connecting plate 7 moves towards the wellbore wall, the fifth detection plate 25 and the sixth detection plate 26 will first contact the convex part and be squeezed by the telescopic rod 11, causing the fifth detection plate 25 and the sixth detection plate

[0043] 26 to bend towards the first direction D1. At this time, the fourth detection plate 24 has not yet been in contact with the bottom of the depression, so the connecting plate 7 will continue to advance, causing the telescopic rod 11 to exert a greater pressure on the fifth and sixth detection plates 26. Figure 8 Meanwhile, the fourth detection plate 24 moves towards the bottom of the depression under the action of the corresponding telescopic rod 11 until it is completely in contact. Since the convex area where the fifth and sixth detection plates 26 are located limits the further movement of the connecting plate 7, their telescopic rods 11 will be compressed more tightly, while the telescopic rod 11 corresponding to the fourth detection plate 24 remains in a relatively extended state. Therefore, as

[0044] shown, the gap Ⅳ30 corresponding to the fourth detection plate 24 will be larger than the gaps Ⅴ31 and Ⅵ32 corresponding to the fifth and sixth detection plates 26.

[0045] The specific working principle of Embodiment 2 is as follows: In this application, the cylinder 4 drives the connecting plate 7 to move towards the wellbore wall. When some detection plates 8 have come into contact with the convex part of the wellbore wall while other detection plates 8 have not yet contacted the depression, the cylinder 4 can continue to push the connecting plate 7 towards the wellbore wall. At this time, for some detection plates 8 that have already come into contact with the convex part, although these detection plates cannot move after contacting the wellbore wall, due to the elastic support of the telescopic rod 11, the detection plate 8 corresponding to the convex part is squeezed by the telescopic rod 11, and the detection plate 8 maintains a stable and continuous contact with the convex part. Therefore, it does not prevent the connecting plate 7 from continuing to move towards the wellbore wall. When the connecting plate 7 continues to move forward towards the wellbore wall, the distance between the connecting plate 7 and the detection plate 8 corresponding to the convex part gradually decreases; For the detection plate that does not contact the depression, the continuous movement of the connecting plate 7 pushes the detection plate 8 at the depression to extend towards the wellbore through the telescopic rod 11. The detection plate 8 gradually fits the wellbore at the depression for detection. After the wellbore on this side is completely detected, the control system drives the cylinder 4 to retract to the preset position. Therefore, for the convex and concave parts with a certain slope, the telescopic rod 11 and the articulated detection plate 8 are used in cooperation to solve the situation where the plate body cannot contact the wellbore for a plane with a certain degree of unevenness.

[0046] Embodiment 3: As Figure 6 shown, fixing plates 13 are respectively arranged at the top and bottom ends of the inner wall of the cylinder body 2. Both ends of the bracket 5 are respectively fixed on the two fixing plates 13. First chutes 14 corresponding to the number of placement holes 19 are arranged on the two fixing plates 13. Both ends of the connecting plate 7 are respectively connected with support plates 15. The support plates 15 are slidably arranged in the first chutes 14 through sliders.

[0047] It should be noted that mounting grooves 16 are formed in the support plates 15. Second chutes are arranged on the opposite side walls of the mounting grooves 16. Both sides of the sliding plate 17 are slidably arranged in the second chutes. The connecting plate 7 is connected with the support plates 15 through the sliding plate 17.

[0048] It should be noted that buffer pads are provided at the ends of the first chutes 14.

[0049] Specific working principle of Embodiment 3: When the cylinder 4 drives the connecting plate 7 to move outwards from the placement hole 19, since the connecting plate 7 is connected to the sliding plate 17 and the sliding plate 17 can displace along the second chute of the support plate 15, the sliding plate 17 can be driven to move on the support plate 15 first, and then the support plate 15 can be driven to move in the first chute 14. The support plate 15 has a certain supporting effect on the connecting plate 7, reducing the gravity on the cylinder 4, and the sliding plate 17 can extend the moving distance, so that the moving distance of the connecting plate 7 is not limited to within the first chute 14.

[0050] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An underground data acquisition device for oil and gas wells, comprising a connecting cylinder (1) and a transmitter, characterized in that, At the end of the connecting cylinder (1), a cylinder body (2) with both ends closed is rotatably arranged. The transmitter is arranged inside the cylinder body (2). Inside the cylinder body (2), there is a bracket (5) for placing the cylinder (4). The two ends of the bracket (5) are respectively fixedly connected to the bottom and the top of the cylinder body (2). The bracket (5) is provided with at least three placing frames (6) in sequence from bottom to top. The cylinder (4) is installed inside the placing frame (6). Each cylinder (4) is connected to a plate body assembly (18). The cylinder body (2) is provided with placing holes (19) having the same number as the cylinders (4). The cylinder (4) drives the plate body assembly (18) to move inside the placing holes (19), and a number of sensors are embedded in the plate body assembly. The plate body assembly is used for detecting the well wall.

2. The downhole data acquisition device for oil and gas wells according to claim 1, characterized in that, The plate body assembly (18) includes a connecting plate (7) and a number of detection plates (8). The sensors are distributed on each detection plate (8). The number of detection plates (8) are sequentially hinged at the head and the tail. Two rotating rods (9) are respectively connected to the two detection plates (8) at the head and the tail of the head-to-tail hinge. And in the initial state, a gap (10) is preset between each detection plate (8) and the connecting plate (7). The gap is used to provide a moving space for the relative rotation of adjacent detection plates (8).

3. The downhole data acquisition device for oil and gas wells according to claim 2, characterized in that, A number of telescopic rods (11) equal in number to the detection plates (8) are arranged on the connecting plate (7). In the initial state, each telescopic rod (11) is aligned with each detection plate (8), and the telescopic rod (11) is located in the gap (10) between the connecting plate (7) and the detection plate (8).

4. An underground data acquisition device for oil and gas wells according to claim 3, characterized in that, A number of flexible support blocks (12) are also arranged on the connecting plate (7). Each flexible support block (12) is located between two adjacent telescopic rods (11). In the initial state, the flexible support block (12) is in contact with the detection plate (8).

5. An underground data acquisition device for oil and gas wells according to claim 3, characterized in that, A number of telescopic plates are respectively hinged to the number of detection plates (8).

6. A downhole data acquisition device for oil and gas wells according to any one of claims 2-5, characterized in that, Fixed plates (13) are respectively arranged at the top end and the bottom end of the inner wall of the cylinder body (2). The two ends of the bracket (5) are respectively fixed on the two fixed plates (13). On the two fixed plates (13), first chutes (14) corresponding to the number of placing holes (19) are arranged. The two ends of the connecting plate (7) are respectively connected to support plates (15). The support plates (15) are slidably arranged in the first chutes (14) through sliders.

7. The downhole data acquisition device for oil and gas wells according to claim 6, characterized in that, An installation groove (16) is formed in the support plate (15). Second chutes are arranged on the opposite side walls of the installation groove (16). The two sides of the sliding plate (17) are slidably arranged in the second chutes. The connecting plate (7) is connected to the support plate (15) through the sliding plate (17).

8. The downhole data acquisition device for oil and gas wells according to claim 6, characterized in that, Elastic sealing rings are arranged on the inner edges of the placing holes (19).

9. An underground data acquisition device for oil and gas wells according to claim 6, characterized in that, Buffer pads are arranged at the ends of the first chutes (14).

10. The downhole data acquisition device for oil and gas wells according to claim 6, characterized in that, The angles of a number of placing holes (19) are arranged at intervals.

11. A downhole data acquisition device for oil and gas wells according to claim 4, characterized in that, The flexible support blocks (12) are silica gel foam.

12. An underground data acquisition device for oil and gas wells according to claim 6, characterized in that, The cylinders (4) are all horizontally arranged.

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