Measuring tool

Abstract

This disclosure discloses a measuring tool for measuring the inner diameter of a sleeve. The measuring tool includes a housing, a recording element, a recording pen, and a linkage assembly. The housing has an opening in its side wall. The recording element is located inside the housing and detachably connected to the side wall. The recording pen is located inside the housing and slidably connected to it, with its tip abutting against the recording element. The linkage assembly is rotatably connected to the housing at the opening. A first end of the linkage assembly is located outside the housing, and a second end abuts against the recording pen. The linkage assembly is used to drive the recording pen to slide via the second end when the first end is subjected to pressure toward the inside of the housing, so that the pen tip leaves a mark on the recording element. The mark reflects the radial distance traveled by the first end in the sleeve. In this disclosure, no electrically driven component is provided within the measuring tool, allowing measurement of the inner diameter at the deformation point of the sleeve even if the inner diameter of the sleeve is small.

Description

Technical Field

[0001] This disclosure relates to the field of petrochemical technology, and in particular to a measuring tool. Background Technology

[0002] During oilfield operations, for wells where the casing has deformed, it is often necessary to use measuring tools to measure the change in the inner diameter of the casing in order to determine the extent of the damage and to determine a specific repair plan based on the extent of the damage.

[0003] In related technologies, measuring tools often include an electric drive assembly and multiple measuring arms. After the measuring tool is inserted into the well, the drive assembly drives the multiple measuring arms to extend or retract so that each measuring arm is in close contact with the inner wall of the casing, thereby enabling the inner diameter of the casing to be obtained based on the extension position of the measuring arms.

[0004] However, in the above structure, the electric drive component is often large in size, which in turn makes the measuring tool large in size. When the inner diameter of the sleeve is small, the measuring tool cannot enter the sleeve, thus making it impossible to measure the inner diameter of the sleeve. Summary of the Invention

[0005] This disclosure provides a measuring tool that can solve the aforementioned technical problems existing in related technologies. The technical solution is as follows:

[0006] A measuring tool is provided for measuring the inner diameter of a sleeve, the measuring tool comprising a housing, a recording element, a recording pen, and a linkage assembly;

[0007] The sidewall of the housing has an opening;

[0008] The recording device is located inside the housing and is detachably connected to the side wall of the housing;

[0009] The recording pen is located inside the housing and is slidably connected to the housing, with the pen tip abutting against the recording element;

[0010] The linkage assembly is rotatably connected to the housing at the opening. The first end of the linkage assembly is located outside the housing, and the second end abuts against the recording pen. The linkage assembly is used to drive the recording pen to slide through the second end when the first end is subjected to pressure toward the inside of the housing, so that the pen tip leaves a mark on the recording element. The mark is used to reflect the radial distance of movement of the first end in the sleeve.

[0011] In one possible implementation, the linkage assembly includes a paddle and a link, the paddle being located at the opening and partially outside the housing and fixedly connected to one end of the link, the middle portion of the link being hinged to the housing, and the other end of the link abutting against the recording pen.

[0012] In one possible implementation, the portion of the paddle located outside the housing is shaped like a spherical notch.

[0013] In one possible implementation, the recording device is in the form of a cylinder with graduations on its inner wall, and the pen tip abuts against the inner wall of the cylinder.

[0014] In one possible implementation, the housing includes a housing body and a sleeve, the sleeve being located within the housing body and connected to the side wall of the housing body, the sleeve including a first part and a second part connected together, the first part having a receiving cavity and accommodating the recording device, and the second part being sleeved on the outside of the recording pen and slidably connected to the recording pen.

[0015] In one possible implementation, the housing further includes a bump, a serrated slide rail, and a button;

[0016] The protrusion is slidably connected to the inner wall of the housing body and can slide in the circumferential and axial directions, and is circumferentially connected to the sleeve. The protrusion is used to drive the sleeve to rotate, and the protrusion has a first tooth.

[0017] The serrated slide rail is annular and fixedly connected to the housing body. The serrated slide rail has a second tooth on the side near the protrusion. The second tooth is used to abut against the first tooth, and its radial dimension on the sleeve is smaller than the radial dimension of the first tooth.

[0018] The button is located inside the serrated slide rail and is slidably connected to the inner wall of the serrated slide rail. It can slide axially and is drivenly connected to the recording pen. The button has a third tooth on the side near the protrusion, and the third tooth is used to abut against the first tooth.

[0019] The first tooth surface on one side of each tooth of the first tooth portion, the second tooth surface on one side of each tooth of the second tooth portion, and the third tooth surface on one side of each tooth of the third tooth portion are parallel to each other, and the first tooth surface is used to contact at least one of the second tooth surface and the third tooth surface.

[0020] The tip of the second tooth and the bottom of the groove of the third tooth are offset axially.

[0021] In one possible implementation, the recording pen has a protrusion that abuts against the side of the button away from the protrusion.

[0022] In one possible implementation, the sleeve has a groove, and the protrusion has a transmission rod on the side near the sleeve, the transmission rod being inserted into the groove.

[0023] In one possible implementation, the measuring tool further includes an elastic element located between the sleeve and the protrusion, and used to compress the protrusion.

[0024] In one possible implementation, the measuring tool includes a plurality of recording pens and a plurality of linkage assemblies, the plurality of recording pens being circumferentially distributed along the outer surface of the housing, and the plurality of recording pens and the plurality of linkage assemblies corresponding one-to-one.

[0025] The beneficial effects of the technical solution provided in this disclosure include at least the following:

[0026] At the location where the sleeve deforms, the inner wall of the sleeve presses against the first end of the connecting rod assembly, causing the connecting rod assembly to rotate around the housing. The second end of the connecting rod assembly pushes the recording pen to slide, and the pen's notes leave a mark on the recording device, allowing the inner diameter of the sleeve at that location to be determined based on this mark. In this disclosure, no electrically driven component is included in the measuring tool; therefore, the measuring tool will not become excessively large due to the influence of an electrically driven component, and the inner diameter of the sleeve at the deformation location can be measured even if the inner diameter of the sleeve is small.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a measuring tool provided in an embodiment of this disclosure.

[0030] Figure label:

[0031] 1. Housing; 101. Opening; 11. Housing body; 12. Sleeve; 121. First part; 122. Second part; 13. Protrusion; 131. First tooth; 132. Transmission rod; 14. Serrated slide rail; 141. Second tooth; 15. Button; 151. Third tooth; 152. Baffle; 16. First connector; 17. Second connector;

[0032] 2. Records;

[0033] 3. Recording pen; 31. Pen tip; 32. Protrusion;

[0034] 4. Linkage assembly; 401. First end; 402. Second end; 41. Paddle shifter; 42. Linkage rod;

[0035] 5. Elastic components. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] In related technologies, measuring tools often include a drive assembly and multiple measuring arms. After the measuring tool is inserted into the well, the drive assembly drives the multiple measuring arms to extend or retract so that each measuring arm is in close contact with the inner wall of the casing, thereby enabling the inner diameter of the casing to be obtained based on the extension position of the measuring arms.

[0039] However, in the above structure, the measuring tool is often large in size. When the inner diameter of the sleeve is small, the measuring tool cannot enter the sleeve, thus making it impossible to measure the inner diameter of the sleeve.

[0040] This disclosure provides a measuring tool for measuring the inner diameter of a sleeve, such as... Figure 1 As shown, the measuring tool includes a housing 1, a recording element 2, a recording pen 3, and a linkage assembly 4. The side wall of the housing 1 has an opening 101. The recording element 2 is located inside the housing 1 and is detachably connected to the side wall of the housing 1. The recording pen 3 is located inside the housing 1 and is slidably connected to the housing 1, with its tip 31 abutting against the recording element 2. The linkage assembly 4 is rotatably connected to the housing 1 at the opening 101. The first end 401 of the linkage assembly 4 is located outside the housing 1, and the second end 402 abuts against the recording pen 3. The linkage assembly 4 is used to drive the recording pen 3 to slide through the second end 402 when the first end 401 is subjected to pressure toward the inside of the housing 1, so that the pen tip 31 leaves a mark on the recording element 2. The mark is used to reflect the radial distance of movement of the first end 401 in the sleeve.

[0041] At the location where the sleeve deforms, the inner wall of the sleeve presses against the first end 401 of the connecting rod assembly 4, causing the connecting rod assembly 4 to rotate around the housing 1. The second end 402 of the connecting rod assembly 4 pushes the recording pen 3 to slide, and the writing on the recording pen 3 leaves a mark on the recording element 2, thereby allowing the inner diameter of the sleeve at that location to be determined based on the mark. In this disclosure, no electrically driven component is provided in the measuring tool; therefore, the measuring tool will not become excessively large due to the influence of the electrically driven component, and the inner diameter of the sleeve at the deformation location can be measured even if the inner diameter of the sleeve is small.

[0042] Furthermore, in this embodiment, the measuring tool does not employ an electrically driven component, thus eliminating the need to insert the measuring tool into the casing via a cable. Instead, it can be inserted into the casing using, for example, but not limited to, a small-diameter oil pipe or a flexible short section, minimizing the tool length. Consequently, when the measuring tool passes through a deformed section of the casing, it can be inserted into the casing via an oil pipe or similar means to prevent obstruction of the measuring tool's movement at the deformed section.

[0043] "The first end 401 of the linkage assembly 4 is located outside the housing 1" means that in the initial state where the first end 401 of the linkage assembly 4 is not subjected to a force toward the inside of the housing 1, the first end 401 of the linkage assembly 4 is located outside the housing 1. After the first end 401 of the linkage assembly 4 is subjected to a force toward the inside of the housing 1 and is displaced, there is a possibility that it may be compressed into the opening 101.

[0044] The measuring tool is barrel-shaped, and when the measuring tool measures the sleeve, the radial direction of the measuring tool is consistent with the radial direction of the sleeve.

[0045] When measuring the inner diameter of the casing, the measuring tool can be installed at the bottom of the tubing and inserted into the casing through the tubing to measure the inner diameter at the deformed part of the casing.

[0046] This disclosure does not limit the method of obtaining the inner diameter of the sleeve deformation point through the recording element 2.

[0047] For example, after measuring the inner diameter of the sleeve, the recording piece 2 can be removed from the connecting rod assembly 4, and then the recording piece 2 for reference can be installed into the measuring assembly. Force is applied to the first end 401 of the connecting rod assembly 4, and the distance the first end 401 of the connecting rod assembly 4 moves radially in the measuring tool when the tip of the recording pen 3 moves to the marked position, thereby obtaining the inner diameter of the sleeve at the deformation point.

[0048] The recording pen 3 can be, for example, but not limited to, a ballpoint pen or a recording pen, and the mark left on the recording material 2 by the pen tip 31 can be, for example, but not limited to, ink lines or scratches.

[0049] The extension direction of the recording pen 3 is consistent with the axis of the measuring tool, and the pen tip 31 forms an angle with the extension direction of the recording pen 3 so as to leave a mark in the recording piece 2 when the recording pen 3 slides along the axis of the measuring work.

[0050] The material of the housing 1 is, for example, but not limited to, one or a combination of alloys or plastics.

[0051] The housing 1 includes a housing body 11, a first connector 16, and a second connector 17. The first connector 16 and the second connector 17 are located at both ends of the housing body 11 and are threadedly connected to the housing body 11. The first connector 16 and the second connector 17 are used to connect to the oil pipe so that the measuring tool can enter the casing under the drive of the oil pipe.

[0052] In some embodiments, the linkage assembly 4 includes a paddle 41 and a link 42. The paddle 41 is located at the opening 101 and is partially located outside the housing 1. It is fixedly connected to one end of the link 42. The middle part of the link 42 is hinged to the housing 1. The other end of the link 42 abuts against the recording pen 3.

[0053] This increases the contact area between the connecting rod 42 and the inner wall of the sleeve. Even if the area of ​​the protrusion in the inner diameter of the sleeve is small at the deformation point, it can still compress the lever 41 and cause the connecting rod 42 to rotate. Therefore, the accuracy of the measuring assembly in detecting the inner diameter of the sleeve can be guaranteed.

[0054] The connecting rod 42 and the lever 41 can be connected by multiple bolts. The multiple bolts prevent the lever 41 and the connecting rod 42 from rotating significantly, thus ensuring the stability of the connection between the connecting rod 42 and the lever 41.

[0055] There is a pivot between the connecting rod 42 and the housing 1. The pivot is fixed to one of the connecting rod 42 or the housing 1 and connected to the other.

[0056] The connecting rod 42 has a bent portion. The hinge point between the connecting rod 42 and the housing 1 is located on the side of the bent portion closer to the outside of the housing 1. The point where the connecting rod 42 abuts against the recording pen 3 is located on the side of the bent portion closer to the inside of the housing 1, and the point where the connecting rod 42 abuts against the recording pen 3 is spike-shaped. The connecting rod 42 is not a straight rod, which can prevent the connecting rod 42 from rotating too much and causing the connecting rod 42 to detach from the recording pen 3 during movement. The spike-shaped point where the connecting rod 42 abuts against the recording pen 3 can further ensure that the connecting rod 42 can stably abut against the recording pen 3.

[0057] The measurement components provided in the embodiments of this disclosure will be further described below with reference to some examples.

[0058] In some examples, the portion of the paddle 41 located outside the housing 1 is shaped like a spherical notch.

[0059] The portion of the lever 41 located outside the housing 1 is spherical. When the lever 41 contacts the inner wall of the sleeve, it enables the measuring tool to pass through the deformation of the sleeve more smoothly, thereby preventing the measuring tool from being stuck at the deformation of the sleeve and ensuring the smooth movement of the measuring tool inside the sleeve.

[0060] The portion of the paddle 41 located outside the housing 1 is shaped like a spherical notch smaller than a hemisphere, and the bottom surface of the spherical notch is circular.

[0061] In some examples, the recorder 2 is a cylindrical body with graduations on its inner wall, and the pen tip 31 rests against the inner wall of the cylinder.

[0062] The inner wall of the recording device 2 has multiple scales, which makes it easier to distinguish the location of the marks and thus make it easier to obtain the motion information represented by the marks, so as to obtain the inner diameter of the sleeve at the deformation point.

[0063] The outer wall of the recording component 2 is threadedly connected to the inner wall of the housing 1.

[0064] In some examples, the housing 1 includes a housing body 11 and a sleeve 12. The sleeve 12 is located inside the housing body 11 and is connected to the side wall of the housing body 11. The sleeve 12 includes a first part 121 and a second part 122 connected together. The first part 121 has a receiving cavity and receives the recording device 2. The second part 122 is sleeved on the outside of the recording pen 3 and is slidably connected to the recording pen 3.

[0065] In this way, the second part 122 of the sleeve 12 is fitted on the outside of the recording pen 3, which can support the outside of the recording pen 3, thereby preventing the recording pen 3 from deviating during the sliding process and causing the pen tip 31 to fail to stably abut against the recording element 2. Thus, the stability of the recording pen 3 sliding within the housing 1 can be guaranteed, and the pen tip 31 of the recording pen 3 can accurately leave a mark on the recording element 2.

[0066] The sleeve 12 can be made of, for example, but not limited to, metal or plastic.

[0067] In some examples, the housing 1 further includes a protrusion 13, a serrated slide rail 14, and a button 15. The protrusion 13 is slidably connected to the inner wall of the housing body 11 and is capable of sliding in both the circumferential and axial directions. It is also circumferentially connected to the sleeve 12 and is used to drive the sleeve 12 to rotate. The protrusion 13 has a first tooth 131. The serrated slide rail 14 is annular and fixedly connected to the housing body 11. The serrated slide rail 14 has a second tooth 141 on the side near the protrusion 13. The second tooth 141 abuts against the first tooth 131, and its radial dimension in the sleeve is smaller than that of the first tooth 131. The button 15 is located inside the serrated slide rail 14 and is slidably connected to the inner wall of the serrated slide rail 14. It is also capable of sliding in the axial direction and is drivenly connected to the recording pen 3. The first tooth surface on one side of each tooth of the first tooth portion 131, the second tooth surface on one side of each tooth of the second tooth portion 141, and the third tooth surface on one side of each tooth of the third tooth portion 151 are parallel to each other. The first tooth surface is used to contact at least one of the second tooth surface and the third tooth surface. The tooth tip of the second tooth portion 141 and the groove bottom of the tooth groove of the third tooth portion 151 are axially offset.

[0068] When the connecting rod assembly 4 is in the initial position, the third tooth 151 is retracted into the housing 1, and the second tooth 141 protrudes from the third tooth 151. At this time, the third tooth 151 avoids the first tooth 131, the first tooth surface of the first tooth 131 abuts against one of the second tooth surfaces of the second tooth 141, and the first tooth 131 abuts against the sidewall of a serration of the second tooth 141.

[0069] At the deformation point of the sleeve, the connecting rod assembly 4 is squeezed and pushes the recording pen 3 to slide. Since the recording pen 3 is connected to the button 15, the recording pen 3 can drive the button 15 to slide along the inner wall of the serrated slide rail 14, and make the third tooth 151 protrude from the second tooth 141. At this time, the first tooth surface of the first tooth 131 abuts against one of the third tooth surfaces of the third tooth 151, while the side wall of one of the serrations of the second tooth 141 will avoid the first tooth 131. The first tooth 131 can slide along the third tooth surface, thereby driving the protrusion 13 to rotate circumferentially along the inner wall of the housing 1, and thus driving the recording element 2 to rotate. As a result, the contact position between the pen tip 31 of the recording pen 3 and the recording element 2 can be changed, thereby enabling multiple data to be recorded in the recording element 2.

[0070] Button 15 engages with the keyway on the inner wall of the serrated slide rail 14.

[0071] The third tooth portion 151 includes a plurality of serrations, each serration having the same shape as the serrations of the first tooth portion 131. In the uncompressed state, the serrations of the third tooth portion 151 partially abut against and partially disengage from the serrations of the first tooth portion 131 in the axial direction, with the disengaged and abutted portions each occupying 1 / 2 of the serration width.

[0072] The circumferential width of the serrations on the first tooth portion 131 and the third tooth portion 151 is half the width of the tooth groove between each serration on the second tooth portion 141. The number of tooth grooves in the second tooth portion 141 is half the number of serrations in the third tooth portion 151.

[0073] The radial thickness of the serrations of the bump 13 and the button 15 is the same, and is greater than the radial thickness of the serration groove of the serrated slide rail 14.

[0074] In some examples, the pen 3 has a protrusion 32 that abuts against the side of the button 15 away from the protrusion 13.

[0075] In this way, when the pen 3 moves, it drives the protrusion 32 to move, which in turn drives the button 15 to move closer to the protrusion 13. This causes the third tooth 151 to abut against the first tooth 131, and drives the first tooth 131 to move closer to the sleeve 12. After the third tooth 151 protrudes beyond the second tooth 141, the first tooth surface slides along the second tooth surface, causing the protrusion 13 to rotate. This, in turn, changes the circumferential contact position between the recording element 2 and the pen tip 31. Thus, the transmission connection between the pen 3 and the button 15 can be achieved in a relatively simple way.

[0076] Button 15 has a barrel-shaped structure with a baffle 152 at the bottom. The baffle 152 has an opening for the recording pen 3 to pass through, and the protrusion 32 abuts against the edge of the opening.

[0077] In some examples, the sleeve 12 has a groove, and the protrusion 13 has a drive rod 132 on the side near the sleeve 12, which is inserted into the groove.

[0078] In this way, when the protrusion 13 rotates, it can conveniently drive the sleeve 12 to rotate, thereby driving the recording element 2 to rotate, thus changing the contact position between the recording element 2 and the pen tip 31.

[0079] The protrusion 13 includes multiple transmission rods 132, and the sleeve 12 includes multiple sliding grooves, which makes the transmission connection between the protrusion 13 and the sleeve 12 more stable.

[0080] In some examples, the measuring tool also includes an elastic element 5 located between the sleeve 12 and the protrusion 13, and used to compress the protrusion 13.

[0081] Thus, after the first end 401 of the connecting rod assembly 4 finishes contacting the inner wall of the sleeve deformation area, the elastic member 5 presses against the protrusion 13, the protrusion 13 presses against the button 15, and the button 15 presses against the recording pen 3, thereby enabling the recording pen 3 to return to its original position. At this time, the second tooth 141 protrudes from the third tooth 151, the first tooth 131 and the second tooth 141 contact each other, and under the pressure of the elastic member 5, slide along the second tooth surface, and then abut against a serration of the second tooth 141. As a result, the serration between the first tooth 131 and the second tooth 141 changes, the contact position between the tip 31 of the recording pen 3 and the recording element 2 changes, and it can be stabilized at the changed contact position, at which point the next recording can be performed.

[0082] The elastic element 5 can be, for example, but not limited to, a spring.

[0083] In some examples, the measuring tool includes multiple recording pens 3 and multiple linkage assemblies 4, with the multiple recording pens 3 distributed circumferentially along the outer surface of the housing 1, and the multiple recording pens 3 and multiple linkage assemblies 4 corresponding one-to-one.

[0084] In this way, the measuring tool can measure the deformation at multiple circumferential locations of the sleeve at the deformation point, thereby clarifying the deformation at the deformation point and facilitating the repair of the sleeve.

[0085] If the number of second teeth 141 is A, and the number of recording pens 3 and linkage assemblies 4 is B, then the number of times the recording device 2 can record data is N, where N = A / 2B, A and B are both even numbers, and N is an integer.

[0086] Correspondingly, each time the protrusion 13 drives the recording device 2 to rotate, the recording device 2 can record data once.

[0087] The following describes a specific application of the measurement tool provided in this disclosure in a certain scenario.

[0088] In this application, the normal inner diameter of the sleeve is D = 139.7 mm, and the inner diameter at the deformation point is < 90 mm. The outer diameter of the first housing 1 is set to 58 mm, and the outer diameter of the lever 41 is set to 90 mm under normal conditions. The upper connector of the measuring tool is a flat oil pipe thread with a diameter of 60.3 mm, which is threaded to the housing body 11. The first tooth 131 of the serrated slide rail 14 includes multiple right-angled serrations evenly distributed around the circumference, with 8 serration slots. Its inner wall is provided with a guide rail that mates with the reversing button 15. The third tooth 151 of the button 15 includes 8 serrations evenly distributed around the circumference, and the number of times the recording element 2 can record data is N = 1. After installation, the lower end of the recording pen 3 abuts against the connecting rod 42 through the action of the elastic element 5, and the lever 41 is opened to its maximum. There are 4 recording pens 3.

[0089] The specific usage process is as follows:

[0090] (1) Install the testing tool, insert the recorder 2 for reference, fully compress the paddle 41, remove the recorder 2 as a reference, and reinstall the new recorder 2.

[0091] (2) Connect the testing tool to the bottom of a flat oil pipe with a diameter of 60.3 mm.

[0092] (3) Lower the tubing string slowly when it is about 10m above the deformation point of the casing until it reaches the lower part of the deformation point of the casing. Then slowly lift it up until it is removed from the deformation point of the casing and take out the testing tools.

[0093] (4) Take out record piece 2 and draw a measurement reference line based on the position of the engraved line on record piece 2 for comparison.

[0094] (5) There are two sets of engravings on the record piece 2, with four engravings in each set. Read the four well diameter values ​​along the circumference of each set and draw the cross-sectional view of the casing deformation point to obtain the inner diameter deformation of the casing deformation point.

[0095] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0096] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0097] In the description of this disclosure, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this disclosure and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0098] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0099] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this disclosure.

[0100] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A measuring tool, characterized in that, The measuring tool is used to measure the inner diameter of the sleeve. The measuring tool includes a housing (1), a recording component (2), a recording pen (3), and a connecting rod assembly (4). The sidewall of the housing (1) has an opening (101); The recording device (2) is located inside the housing (1) and is detachably connected to the side wall of the housing (1); The recording pen (3) is located inside the housing (1) and is slidably connected to the housing (1), and the pen tip (31) abuts against the recording element (2); The linkage assembly (4) is rotatably connected to the housing (1) at the opening (101). The first end (401) of the linkage assembly (4) is located outside the housing (1), and the second end (402) abuts against the recording pen (3). The linkage assembly (4) is used to drive the recording pen (3) to slide through the second end (402) when the first end (401) is subjected to pressure toward the housing (1), so that the pen tip (31) leaves a mark on the recording element (2). The mark is used to reflect the distance the first end (401) moves in the radial direction of the sleeve.

2. The measurement tool of claim 1, wherein, The linkage assembly (4) includes a paddle (41) and a connecting rod (42). The paddle (41) is located at the opening (101) and partially outside the housing (1), and is fixedly connected to one end of the connecting rod (42). The middle part of the connecting rod (42) is hinged to the housing (1), and the other end of the connecting rod (42) abuts against the recording pen (3).

3. The measurement tool of claim 2, wherein, The portion of the paddle (41) located outside the housing (1) is spherical.

4. The measuring tool according to claim 1, characterized in that, The recording device (2) is cylindrical, and the inner wall of the cylindrical body has a scale. The pen tip (31) abuts against the inner wall of the cylindrical body.

5. The measuring tool according to claim 1, characterized in that, The housing (1) includes a housing body (11) and a sleeve (12). The sleeve (12) is located inside the housing body (11) and is connected to the side wall of the housing body (11). The sleeve (12) includes a first part (121) and a second part (122) connected together. The first part (121) has a receiving cavity and receives the recording device (2). The second part (122) is sleeved on the outside of the recording pen (3) and is slidably connected to the recording pen (3).

6. The measuring tool according to claim 5, characterized in that, The housing (1) also includes a protrusion (13), a serrated slide rail (14), and a button (15); The protrusion (13) is slidably connected to the inner wall of the housing body (11) and can slide in the circumferential and axial directions, and is circumferentially connected to the sleeve (12). The protrusion (13) is used to drive the sleeve (12) to rotate. The protrusion (13) has a first tooth (131). The serrated slide rail (14) is annular and fixedly connected to the housing body (11). The serrated slide rail (14) has a second tooth (141) on the side near the protrusion (13). The second tooth (141) is used to abut against the first tooth (131), and its radial dimension in the sleeve is smaller than the radial dimension of the first tooth (131). The button (15) is located inside the serrated slide rail (14) and is slidably connected to the inner wall of the serrated slide rail (14). It can slide axially and is connected to the recording pen (3). The button (15) has a third tooth (151) on the side near the protrusion (13). The third tooth (151) is used to abut against the first tooth (131). The first tooth surface on one side of each tooth of the first tooth portion (131), the second tooth surface on one side of each tooth of the second tooth portion (141), and the third tooth surface on one side of each tooth of the third tooth portion (151) are parallel, and the first tooth surface is used to contact at least one of the second tooth surface and the third tooth surface. The tip of the second tooth (141) is offset from the bottom of the groove of the third tooth (151) in the axial direction.

7. The measuring tool according to claim 6, characterized in that, The recording pen (3) has a protrusion (32) that abuts against the side of the button (15) away from the protrusion (13).

8. The measuring tool according to claim 6, characterized in that, The sleeve (12) has a groove, and the protrusion (13) has a transmission rod (132) on the side near the sleeve (12), and the transmission rod (132) is inserted into the groove.

9. The measuring tool according to claim 6, characterized in that, The measuring tool also includes an elastic element (5) located between the sleeve (12) and the protrusion (13) and used to press the protrusion (13).

10. The measuring tool according to any one of claims 1-9, characterized in that, The measuring tool includes a plurality of recording pens (3) and a plurality of connecting rod assemblies (4). The plurality of recording pens (3) are distributed circumferentially along the outer surface of the housing (1), and the plurality of recording pens (3) and the plurality of connecting rod assemblies (4) correspond one-to-one.

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