Parallel transfer type caliper logging instrument
The design of the well logging tool, which allows for easy disassembly and assembly, solves the problem of inconvenience in carrying it, resulting in a smaller space footprint and convenient portability.
Patent Information
- Application Number
- CN202520071109.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing parallel split-action logging tools are long and take up a lot of space, making them inconvenient to carry.
The well logging tool can be disassembled and assembled by using a socket, hollow plug, locking block, first spring, crossbar, limit ring, collar, slider and locking hole, making it easy to carry.
This solves the problem of large space occupation during the transport of well logging tools, improves portability, and avoids the bending phenomenon of springs during deformation.
Smart Images
Figure CN223562799U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of petroleum technology, specifically to a parallel split-action well logging instrument. Background Technology
[0002] A caliper is an instrument used to measure the diameter of a wellbore and to detect casing deformation. In the oil production process, casing wear is inevitable in oil fields. The implementation of various oil production measures causes pressure imbalances between wells and between layers, which exacerbates a series of casing damage phenomena such as fault activity, mudstone water absorption and expansion, and chemical corrosion, resulting in casing wear, corrosion, breakage, and other deformations. Currently, using a caliper logging tool to measure casing is one of the effective means to detect casing damage.
[0003] When using existing parallel split-action caliper logging tools, the logging tool is lowered into the oil well, and the sensors are moved by the sensor bases on both sides of the logging tool so that the sensors are in contact with the inner wall of the oil well to measure its caliper.
[0004] However, existing parallel split-action caliper logging tools are relatively long when carried because the logging tool is composed of multiple measuring mechanisms. This makes them cumbersome to carry and therefore inconvenient to transport. Utility Model Content
[0005] To address the shortcomings of existing technologies, this utility model provides a parallel split-action caliper logging tool, which solves the problem that existing parallel split-action caliper logging tools are relatively long and take up a lot of space when carried, making them inconvenient to carry.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a parallel split-action well logging tool, comprising two housings, each housing having a sensor base on its exterior, and a splicing mechanism between the two housings. The splicing mechanism includes: a socket fixedly connected to the top of one housing; a hollow insert fixedly connected to the bottom of the other housing and inserted into the inner wall of the socket; a locking hole formed in the inner wall of the socket; and a locking block penetrating the hollow insert and movably connected to it, inserted into the inner wall of the locking hole. A spring, with both ends fixedly connected to the sides of the locking blocks that are close to each other; a collar, fitted onto the outer wall of the socket; a crossbar, with its end abutting the inner wall of the collar and passing through the socket, and movably connected to the socket, and its beginning abutting the outer wall of the locking block; an auxiliary unit, disposed inside the locking block; wherein, driven by the hollow insert, the locking block is inserted into the locking hole inside the socket, thereby causing the crossbar to move in the socket and abutting the inner wall of the collar, fixing the socket and the hollow insert together, and the first spring is limited by the auxiliary unit.
[0007] Preferably, the auxiliary unit includes: a groove formed on the outer wall of the locking block; a horizontal column sleeved on the outer wall of the groove and on the outer wall of the first spring; and a third spring, with its two ends fixedly connected to the inner wall of the groove and the end of the horizontal column, respectively; wherein, driven by the locking block, the third spring causes the horizontal column to move in the groove to limit the first spring.
[0008] Preferably, a limit ring is fixedly connected to the outer wall of the crossbar.
[0009] Preferably, a slider is fixedly connected to the inner wall of the collar, and the outer wall of the slider is slidably engaged with the inner wall of the socket.
[0010] Preferably, a second spring is fixedly connected between one of the outer casings and the collar.
[0011] Preferably, a motor is fixedly connected to the inner wall of each of the two housings via a motor sleeve. A double-ended screw is fixedly connected to the output shaft of the motor. The end of the double-ended screw is rotatably connected to the inner wall of the housing via a bearing. A connecting post is threadedly connected to the outer wall of the double-ended screw. A connecting rod is rotatably connected to the inner wall of the connecting post via a pin. A block is rotatably connected to the end of the connecting rod away from the connecting post via a pin. The side of the block away from the connecting post is fixedly connected to the outer wall of the sensor base.
[0012] Preferably, vertical columns are fixedly connected to the two outer shells on opposite sides.
[0013] Beneficial effects
[0014] This utility model provides a parallel split-action caliper logging tool. It has the following advantages: This parallel split-action caliper logging tool, through the cooperation of a socket, hollow insert, locking block, first spring, crossbar, limiting ring, collar, slider, second spring, and locking hole, enables the disassembly of the parallel split-action caliper logging tool, facilitating its transport. This solves the problem that existing parallel split-action caliper logging tools are relatively long, occupying a large amount of space and making them inconvenient to carry.
[0015] The cooperation between the third spring, the horizontal column, and the groove enables the first spring to be limited, preventing it from bending during deformation. This solves the problem that the first spring is prone to bending during deformation because its interior is hollow. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 for Figure 1 An exterior schematic diagram;
[0018] Figure 3 for Figure 1 A structural diagram of the socket, hollow pin, and locking block;
[0019] Figure 4 for Figure 1 Enlarged view of point A in the middle;
[0020] Figure 5 for Figure 4 A schematic diagram of the middle collar, the slider, and the second spring;
[0021] Figure 6 for Figure 1 Enlarged view of section B in the middle.
[0022] In the diagram: 1. Outer shell; 11. Vertical column; 2. Sensor base; 21. Motor; 22. Double-ended screw; 23. Connecting column; 24. Connecting rod; 25. Stand block; 3. Assembly mechanism; 31. Socket; 32. Hollow insert; 33. Locking block; 34. First spring; 35. Horizontal bar; 351. Limiting ring; 36. Collar; 361. Sliding block; 362. Second spring; 37. Locking hole; 38. Auxiliary unit; 381. Third spring; 382. Horizontal column; 383. Groove. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] The existing parallel split-action caliper logging tools are relatively long when carried, taking up a lot of space and making them inconvenient to carry.
[0025] In view of this, the present invention provides a parallel split-action caliper logging tool. Through the cooperation of the socket, hollow plug, locking block, first spring, crossbar, limiting ring, collar, slider, second spring, and locking hole, the parallel split-action caliper logging tool can be disassembled, making it convenient to carry. This solves the problem that the existing parallel split-action caliper logging tools are relatively long and take up a lot of space when carried, making them inconvenient to carry.
[0026] Those skilled in the art will connect the electrical components and their compatible power supplies in this case using wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle below, where the electrical components are connected in the order of operation. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, without further explanation of electrical control.
[0027] Example 1, by Figure 1-6As can be seen, the parallel split-action caliper logging tool in this case includes a housing 1, which is cylindrical in shape. Two housings 1 are provided, each with a sensor base 2 on its exterior. Each measuring mechanism has two sensor bases 2, and each sensor base 2 has three circular mounting holes. Displacement sensors and limit switches are mounted to the sensor bases 2 through these holes. When the sensor base 2 expands outward, the displacement sensor mounted on it measures the caliper. When the limit switch touches the outer wall of the wellbore, the sensor base 2 stops moving. After measurement, the sensor base 2 returns to its initial position. When the sensor base 2 is in contact with the inner wall of the wellbore, the sensor base 2 does not... The system will move, and a splicing mechanism 3 is provided between the two outer shells 1. The splicing mechanism 3 includes: a socket 31, which is fixedly connected to the top of one outer shell 1; two side locking blocks 33 moving in the hollow insert 32; the two side locking blocks 33 compressing the first spring 34; when the collar 36 descends to the bottom of the socket 31, the two side crossbars 35 push the locking blocks 33 back into the hollow insert 32, causing the two side locking blocks 33 to leave the locking holes 37; the operator moves the upper outer shell 1, which drives the hollow insert 32 to move, and the hollow insert 32 leaves the socket 31, separating the two outer shells 1 to carry the parallel split-movement well logging tool as a whole; and a hollow insert 32, which is fixedly connected to the bottom of the other outer shell 1 and inserted into the inner wall of the socket 31. Hole 37 is formed in the inner wall of socket 31. A locking block 33 passes through hollow insert 32 and is movably connected to it, and is inserted into the inner wall of the locking hole 37. When it is necessary to measure the oil well casing, the operator moves the collar 36 back to its initial position. After completion, the operator moves the upper outer shell 1, which drives the hollow insert 32 into socket 31. At this time, the locking blocks 33 on both sides are squeezed by the bottom of socket 31, causing the first spring 34 to be squeezed. When the locking blocks 33 on both sides move to the position of locking hole 37, they insert into the locking hole 37, thereby returning the crossbars 35 on both sides to their initial positions. The parallel split-action well logging instrument is then assembled together. The first spring 34 is fixedly connected at both ends to the locking blocks 33, bringing them closer together. On one side, a collar 36 is fitted onto the outer wall of the socket 31. A crossbar 35, with its end abutting the inner wall of the collar 36 and penetrating the socket 31, is movably connected to it. Its beginning abuts the outer wall of the locking block 33. When carrying the parallel-moving caliper logging tool, the operator first moves the collar 36 downwards. The collar 36 drives the crossbar 35 to move, and the crossbars 35 on both sides move along the inner wall of the collar 36, thus pressing against the crossbars 35. The crossbars 35 on both sides move within the socket 31, pressing against the locking block 33. An auxiliary unit 38 is located inside the locking block 33. Driven by the hollow insert 32, the locking block 33 inserts into the locking hole 37 inside the socket 31, thereby allowing the crossbar 35 to move within the socket 31.It fits snugly against the inner wall of the collar 36, fixing the socket 31 and the hollow plug 32 together, and the first spring 34 is limited by the auxiliary unit 38;
[0028] In the specific implementation process, it is worth noting that the outer shell 1 is cylindrical in shape, and there are two sensor bases 2 on one measuring mechanism. Each sensor base 2 has three circular mounting holes. The displacement sensor and limit switch are installed on the sensor base 2 through the mounting holes. When the sensor base 2 expands outward, the displacement sensor installed on the sensor base 2 measures the well diameter. When the limit switch touches the outer wall of the oil well, the sensor base 2 stops moving. After the measurement is completed, the sensor base 2 returns to its initial position. When the sensor base 2 is in contact with the inner wall of the oil well, the sensor base 2 will not move. When carrying the parallel split-type well diameter logging tool, the operator first moves the collar 36 downward. The collar 36 drives the crossbar 35 to move. The crossbars 35 on both sides move along the inner wall of the collar 36, thereby squeezing the crossbars 35 on both sides. The crossbars 35 on both sides move in the socket 31 and squeeze the locking block 33 on both sides. The locking block 33 on both sides moves in the hollow insert 32. The two locking blocks 33 compress the first spring 34. When the collar 36 descends to the bottom of the socket 31, the crossbars 35 on both sides push the locking blocks 33 back into the hollow insert 32, causing the locking blocks 33 to leave the locking holes 37. The operator moves the upper outer shell 1, which in turn moves the hollow insert 32, causing it to leave the socket 31 and separating the two outer shells 1. This allows the parallel split-type caliper logging tool to be carried as a whole. When it is necessary to measure the oil well casing, the operator moves the collar 36. After returning to the initial position, the operator moves the upper outer shell 1, which drives the hollow insert 32 into the socket 31. At this time, the two side blocks 33 are squeezed by the bottom of the socket 31, causing the first spring 34 to be squeezed. When the two side blocks 33 move to the position of the locking hole 37, the two side blocks 33 are inserted into the locking hole 37, thereby causing the two side crossbars 35 to return to the initial position, assembling the parallel split-action caliper logging tool together, realizing the disassembly of the parallel split-action caliper logging tool, making it convenient to carry.
[0029] Furthermore, the auxiliary unit 38 includes: a groove 383 formed on the outer wall of the locking block 33, which moves the groove 383 when the locking blocks 33 on both sides move; a horizontal column 382 sleeved on the outer wall of the groove 383, which moves in the groove 383 and is sleeved on the outer wall of the first spring 34; and a third spring 381, which is fixedly connected at both ends to the inner wall of the groove 383 and the end of the horizontal column 382, respectively. The shape of the horizontal column 382 and the groove 383 is square. When the horizontal column 382 moves, it compresses the third spring 381 on both sides, thereby ensuring that the horizontal column 382 can move normally and limit the first spring 34 to prevent the first spring 34 from bending when deformed. The third spring 381, driven by the locking block 33, causes the horizontal column 382 to move in the groove 383 to limit the first spring 34.
[0030] In the specific implementation process, it is worth noting that when the two side blocks 33 move, the two side blocks 33 drive the groove 383 to move, and the two side horizontal columns 382 move in the groove 383. The shape of the horizontal column 382 and the groove 383 are both square. When the horizontal column 382 moves, it compresses the third spring 381 on both sides, thereby ensuring that the horizontal column 382 can move normally and limit the first spring 34 to avoid the first spring 34 from bending when deformed.
[0031] Furthermore, a limiting ring 351 is fixedly connected to the outer wall of the crossbar 35. When the crossbars 35 on both sides move, the crossbars 35 on both sides drive the limiting ring 351 to move. The limiting ring 351 limits the crossbars 35 to prevent the crossbars 35 on both sides from moving out of the socket 31.
[0032] In the specific implementation process, it is worth noting that when the horizontal bars 35 on both sides move, the horizontal bars 35 on both sides drive the limiting ring 351 to move. The limiting ring 351 limits the horizontal bars 35 to prevent the horizontal bars 35 on both sides from moving out of the socket 31.
[0033] Furthermore, a slider 361 is fixedly connected to the inner wall of the collar 36. It is worth noting that when the collar 36 moves, the collar 36 drives the slider 361 to move. The outer wall of the slider 361 slides and engages with the inner wall of the socket 31. It is worth noting that when the collar 36 moves, the collar 36 drives the slider 361 to move.
[0034] In the specific implementation process, it is worth noting that when the collar 36 moves, the collar 36 drives the slider 361 to move, and the sliders 361 on both sides slide on the limiting grooves in the inner walls on both sides of the socket 31 to limit the collar 36.
[0035] Furthermore, a second spring 362 is fixedly connected between a housing 1 and a collar 36. When the operator disassembles the logging tool, the collar 36 descends, compressing the second spring 362. After the logging tool is assembled, the second spring 362 fixes the collar 36 with its elastic force, thereby preventing the collar 36 from moving during measurement.
[0036] In the specific implementation process, it is worth noting that when the staff disassembles the logging tool, the collar 36 descends, which compresses the second spring 362. After the logging tool is assembled, the second spring 362 fixes the collar 36 with its elasticity, thereby preventing the collar 36 from moving during measurement.
[0037] Specifically, when carrying the parallel-action caliper logging tool, the operator first moves the collar 36 downwards. The collar 36 moves the slider 361, and the sliders 361 on both sides slide on the limiting grooves in the inner walls of the socket 31. The collar 36 descends, compressing the second spring 362. The collar 36 moves the crossbar 35, and the crossbars 35 on both sides move the limiting rings 351. The crossbars 35 on both sides move along the inner wall of the collar 36, thus squeezing the crossbars 35 on both sides. The crossbars 35 on both sides move in the socket 31, squeezing the locking blocks 33 on both sides. The locking blocks 33 on both sides move the grooves 383, and the crossposts 382 on both sides move in the grooves 383. When the crossposts 382 move, the third springs 381 on both sides deform, and the locking blocks 33 on both sides move in the hollow inserts 32. The locking blocks 33 on both sides compress the first spring 34. When the collar 36 descends to the bottom of the socket 31... The horizontal bars 35 on both sides push the locking blocks 33 back into the hollow inserts 32, causing the locking blocks 33 on both sides to leave the locking holes 37. The operator moves the upper outer shell 1, which in turn moves the hollow inserts 32, causing them to leave the socket 31. This separates the two outer shells 1, allowing the parallel split-action caliper logging tool to be carried as a whole. When it is necessary to measure the oil well casing, the operator moves the collar 36 back to its initial position. The second spring 362 fixes the collar 36 with its elastic force. After that, the operator moves the upper outer shell 1, which in turn moves the hollow inserts 32 into the socket 31. At this time, the locking blocks 33 on both sides are squeezed by the bottom of the socket 31, causing the first spring 34 to squeeze. When the locking blocks 33 on both sides move to the position of the locking holes 37, they insert into the locking holes 37, thus returning the horizontal bars 35 on both sides to their initial positions, assembling the parallel split-action caliper logging tool together.
[0038] Example 2, by Figure 1 , 2As shown in points 4 and 6, the inner walls of both outer casings 1 are fixedly connected to motors 21 via motor sleeves. The output shafts of motors 21 are fixedly connected to double-ended screws 22. When measuring the oil well casing, the two motors 21 are started sequentially. Motors 21 drive the double-ended screws 22 to rotate. The ends of the double-ended screws 22 are rotatably connected to the inner wall of outer casing 1 via bearings. A connecting post 23 is threaded onto the outer wall of the double-ended screw 22. The double-ended screw 22 drives the connecting post 23 to move. The inner wall of the connecting post 23 is rotatably connected to a connecting rod 24 via a pin. Two adjacent connecting posts 23 drive the connecting rod 24 to move. The rod 24 moves, and the end of the connecting rod 24 away from the connecting column 23 is rotatably connected to the vertical block 25 through a pin. The adjacent connecting rods 24 on both sides drive the vertical block 25 to move. The side of the vertical block 25 away from the connecting column 23 is fixedly connected to the outer wall of the sensor base 2. The two adjacent vertical blocks 25 drive the sensor base 2 to move to measure the oil well casing. When the sensor base 2 is in contact with the inner wall of the oil well casing, the motors 21 on both sides stop. After the measurement is completed, the two motors 21 are rotated in the opposite direction, and the sensor base 2 returns to the initial position, thus realizing the movement of the sensor base 2.
[0039] In the specific implementation process, it is worth noting that when measuring the oil well casing, two motors 21 are started in sequence. The motors 21 drive the double-headed screw 22 to rotate, the double-headed screw 22 drives the connecting column 23 to move, two adjacent connecting columns 23 drive the connecting rod 24 to move, the two adjacent connecting rods 24 on both sides drive the vertical block 25 to move, and the two adjacent vertical blocks 25 drive the sensor base 2 to move, so as to measure the oil well casing. When the sensor base 2 is in contact with the inner wall of the oil well casing, the motors 21 on both sides are stopped. After the measurement is completed, the two motors 21 are rotated in the opposite direction, and the sensor base 2 returns to the initial position, thereby driving the sensor base 2 to move.
[0040] Furthermore, vertical columns 11 are fixedly connected to the two outer shells 1 on opposite sides. The surface of the vertical column 11 is provided with mounting holes, which are circular in shape. The operator can install the tandem caliper logging tool onto the external connector through the mounting holes on the vertical column 11, thereby enabling the tandem caliper logging tool to move inside the oil well.
[0041] In the specific implementation process, it is worth noting that the surface of the vertical column 11 is provided with mounting holes. The mounting holes are circular in shape. The staff can use the mounting holes on the vertical column 11 to install the entire linkage caliper logging tool onto the external connector, thereby enabling the linkage caliper logging tool to move inside the oil well.
[0042] Specifically, the operator first installs the sectional caliper logging tool onto the external connector through the mounting holes on the vertical column 11, allowing the tool to move inside the oil well. Once in the working position, the two motors 21 are started sequentially. The motors 21 drive the double-headed screw 22 to rotate, which in turn drives the connecting column 23 to move. Two adjacent connecting columns 23 drive the connecting rod 24 to move, and the adjacent connecting rods 24 on both sides drive the vertical block 25 to move. The two adjacent vertical blocks 25 then drive the sensor base 2 to move, thus measuring the oil well casing. When the sensor base 2 is in contact with the inner wall of the oil well casing, the motors 21 on both sides are stopped. After the measurement is completed, the two motors 21 are rotated in the opposite direction, and the sensor base 2 returns to its initial position.
[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A parallel-operated caliper logging tool, comprising a housing (1), characterized in that: There are two housings (1), and each housing (1) has a sensor base (2) on its exterior. A splicing mechanism (3) is provided between the two housings (1). The splicing mechanism (3) includes: A socket (31) is fixedly connected to the top of one of the housings (1); Hollow insert (32) is fixedly connected to the bottom of another housing (1) and inserted into the inner wall of the socket (31); A slot (37) is provided on the inner wall of the socket (31); The card block (33) passes through the hollow insert (32) and is movably connected to the hollow insert (32), and is inserted into the inner wall of the card hole (37); The first spring (34) is fixedly connected at both ends to the side of the locking block (33) that is close to each other; A collar (36) is fitted onto the outer wall of the socket (31); The crossbar (35) has its end attached to the inner wall of the collar (36) and passes through the socket (31), and is movably connected to the socket (31), and its beginning is attached to the outer wall of the card block (33); An auxiliary unit (38) is disposed inside the card block (33); Driven by the hollow plug (32), the locking block (33) is inserted into the locking hole (37) inside the socket (31), thereby causing the crossbar (35) to move in the socket (31) and fit against the inner wall of the collar (36), fixing the socket (31) and the hollow plug (32) together, and limiting the first spring (34) through the auxiliary unit (38).
2. The parallel split-action caliper logging tool according to claim 1, characterized in that: The auxiliary unit (38) includes: A groove (383) is formed on the outer wall of the card block (33); A horizontal column (382) is sleeved on the outer wall of the groove (383) and also sleeved on the outer wall of the first spring (34); The third spring (381) is fixedly connected at both ends to the inner wall of the groove (383) and the end of the crossbar (382); The third spring (381), driven by the locking block (33), causes the horizontal column (382) to move in the groove (383) to limit the first spring (34).
3. The parallel split-action caliper logging tool according to claim 1, characterized in that: The outer wall of the crossbar (35) is fixedly connected to a limit ring (351).
4. The parallel split-action caliper logging tool according to claim 1, characterized in that: The inner wall of the collar (36) is fixedly connected to a slider (361), and the outer wall of the slider (361) is slidably engaged with the inner wall of the socket (31).
5. The parallel split-action caliper logging tool according to claim 1, characterized in that: A second spring (362) is fixedly connected between the outer shell (1) and the collar (36).
6. The parallel split-action caliper logging tool according to claim 1, characterized in that: The inner walls of both outer shells (1) are fixedly connected to motors (21) via motor sleeves. The output shaft of the motor (21) is fixedly connected to a double-ended screw (22). The end of the double-ended screw (22) is rotatably connected to the inner wall of the outer shell (1) via a bearing. The outer wall of the double-ended screw (22) is threadedly connected to a connecting post (23). The inner wall of the connecting post (23) is rotatably connected to a connecting rod (24) via a pin. The end of the connecting rod (24) away from the connecting post (23) is rotatably connected to a block (25) via a pin. The side of the block (25) away from the connecting post (23) is fixedly connected to the outer wall of the sensor base (2).
7. A parallel split-action caliper logging tool according to claim 1, characterized in that: Vertical columns (11) are fixedly connected to the two outer shells (1) on the opposite sides.