Clamping tool for assisting sonar measurement cavity of highly-deviated well
By designing a sonar chamber clamping tool including rigid and flexible connecting sleeves, sonar fixing components and tail adaptive bodies, the problem of sonar equipment being easily blocked and stuck in a large slope well section is solved, and the equipment is safely downward and efficiently improved.
Patent Information
- Application Number
- CN202311785396.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-22
- Publication Date
- 2025-06-24
AI Technical Summary
When the oblique angle of some new drilling wells and old salt mines or near old wells or casing shoes is large, directly using cable-with sonar equipment is very likely to cause obstacles and jamming, resulting in the sonar chamber equipment being damaged or unable to be lifted down the hole.
A large slope well assisted sonar chamber clamping tool is designed, including a rigid connection casing, a flexible connection casing, a sonar fixing assembly and a tail adapter. The flexible connecting casing is bent to adapt to well tubes with large bend angles to avoid clamping; the sonar fixing assembly is fixed to the sonar assembly by clamping adjustment screws and elastic column pins; the tail adapter is elastic, helping the tool enter and exit the well tube smoothly.
It effectively avoids the blocking problem of sonar equipment in large slope well sections, ensures the safe downward and upward of sonar chamber equipment, and reduces tool damage and operation difficulties in complex situations downhole.
Smart Images
Figure CN120193835A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of exploration well auxiliary tools, and particularly relates to a large-angle well auxiliary sonar cavity measurement clamping tool. Background Art
[0002] Natural gas is a very important clean energy source and has become one of the important energy sources for effectively implementing low-carbon, green, and environmental protection development. However, the supply of natural gas faces challenges such as the long distance between the consumption market and the resource area, short-term insufficient natural gas supply caused by extreme weather, and insufficient gas storage and peak shaving capacity. Salt cavern gas storage is an indispensable important link in the industrial production, supply, storage, and marketing system of natural gas. Underground gas storage has four functions: seasonal peak shaving, emergency supply, strategic reserve, and market mitigation. It can ensure indoor temperature under cold climate conditions, ensure life safety under harsh conditions, and guarantee production in case of gas shortage, playing an important role in maintaining social stability and ensuring the basic needs of the people.
[0003] As one of the main types of gas storage, salt cavern gas storage has the advantages of high injection and production efficiency and large short-term throughput. The construction of a salt cavern gas storage is mainly achieved through the following main steps: 1. First, a wellbore of a suitable size is drilled from the surface to the salt layer depth through surface drilling. The main purpose is to form a connection channel between the salt layer and the ground, providing the basic conditions for subsequent cavity formation; 2. After casing the wellbore and lowering two strings of pipes (inner cavity-forming pipe and outer cavity-forming pipe) to the predetermined depth underground, fresh water is injected from the surface through the normal circulation or reverse circulation method for cavity formation operations. The main purpose of cavity formation is to dissolve the underground salt rock with fresh water to form a huge salt cavity at the predetermined depth position, providing space for subsequent storage of natural gas or other media; 3. After cavity formation, the natural gas is replaced with brine by injecting gas and discharging brine and stored in the salt cavity. After the cavity formation stage of step "2", a sonar cavity measurement tool is lowered to perform sonar cavity measurement on the eroded cavity to understand the erosion morphology and volume of the salt cavity, providing basic data for subsequent gas injection, brine discharge, and stability analysis. However, there are the following problems in the current sonar cavity measurement operation. The well inclination angle is relatively large near the directional section or casing shoe of some newly drilled wells and old salt mine wells. Directly using the method of cable-borne sonar equipment is extremely likely to cause jamming, resulting in damage to the sonar cavity measurement equipment underground or inability to lift it, leading to downhole complications. Therefore, there is an urgent need for a sonar cavity measurement auxiliary downhole tool to meet the requirements of sonar cavity measurement in large-angle well sections. Summary of the Invention
[0004] In order to overcome the defects existing in the above-mentioned prior art, the purpose of this application is to solve the problem that the well inclination angle is relatively large near the directional section or casing shoe of some newly drilled wells and old salt mine wells, and directly using the method of cable-borne sonar equipment is extremely likely to cause jamming. To achieve the above purpose, this application provides the following technical solutions:
[0005] An auxiliary sonar cavity clamping tool for highly deviated wells, the clamping tool comprising: a rigid connection sleeve, a flexible connection sleeve, a sonar fixing assembly, and a tail adaptor. A plurality of rigid connection sleeves and a plurality of flexible connection sleeves are provided. The plurality of rigid connection sleeves, the plurality of flexible connection sleeves, and the tail adaptor are arranged in sequence and fixedly connected to form a sleeve group. A plurality of sonar fixing assemblies are provided. The plurality of sonar fixing assemblies are arranged at a specified interval and inserted into the sleeve group. Both ends of the sonar fixing assembly are fixedly connected to the rigid connection sleeve or the flexible connection sleeve on both sides thereof.
[0006] Further, the sonar fixing assembly includes a sonar fixing body, a clamping adjustment screw, and an elastic dowel pin. The clamping adjustment screw and the elastic dowel pin are both installed in the sonar fixing body. The sonar fixing body is cylindrical. The clamping adjustment screw is threadedly connected to the sonar fixing body, and the clamping adjustment screw radially penetrates the entire sonar fixing body starting from the outer circumferential surface of the sonar fixing body.
[0007] Further, a plurality of clamping adjustment screws and a plurality of elastic dowel pins are provided, and the clamping adjustment screws and the elastic dowel pins are arranged at equal circumferential intervals.
[0008] Further, a plurality of radially distributed threaded holes are provided in the sonar fixing body. The threaded holes penetrate the entire sonar fixing body and are used to connect the rigid connection sleeve or the flexible connection sleeve.
[0009] Further, the elastic dowel pin includes: a steel ball, a housing, a compression spring, a rear cover, and a fixing screw. A through hole is provided inside the housing. The top bracket of the through hole gradually narrows. The steel column is located at the topmost end of the through hole and cannot pass through the top of the through hole. A compression spring is provided below the steel column, and a rear cover is provided below the compression spring. The rear cover is installed on the housing by a fixing screw.
[0010] Further, the tail adaptor includes a support tube and an elastic sleeve. The support tube is made of a rigid material, and the elastic sleeve is sleeved on the support tube and has a tapered hole inside.
[0011] Further, the rigid connection sleeve includes a tube body and connection bosses provided at two axial ends of the tube body. A plurality of through holes are provided in the connection bosses for connecting the rigid connection sleeves to each other or for connecting the sonar fixing assembly.
[0012] Further, the flexible connection sleeve includes an inner tube and an outer tube. One end of the inner tube is provided with a flange and the other end is provided with a spherical connection portion. One end of the outer tube is also provided with a flange, and the other end is provided with a spherical groove connection portion. The spherical connection portion is embedded in the spherical groove connection portion to connect the inner tube and the outer tube.
[0013] Further, after installation, the inner tube or the outer tube can rotate radially along the spherical joint, and the maximum rotation angle is 5-10°.
[0014] Technical effects and advantages of the present application:
[0015] In the present application, the clamping tool includes a flexible connection component and a rigid connection component, wherein the flexible connection component can be bent. When entering a well tube with a large bending angle, the flexible connection component can be bent adaptively to facilitate the passage of the sonar component and avoid jamming.
[0016] Other features and advantages of the present application will be described in the subsequent specification, and partly will become obvious from the specification, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures pointed out in the specification and the drawings. Description of the drawings
[0017] Figure 1 is a schematic structural diagram of an auxiliary sonar cavity clamping tool for a highly deviated well in the present application;
[0018] Figure 2 is a schematic structural diagram of the sonar fixing component in the present application;
[0019] Figure 3 is a schematic structural diagram of the elastic dowel pin in the present application;
[0020] Figure 4 is a schematic structural diagram of the tail adaptive body in the present application;
[0021] Figure 5 is a schematic structural diagram of the flexible connection sleeve in the present application;
[0022] Figure 6 is a schematic structural diagram of the rigid connection sleeve in the present application;
[0023] In the figure: 1 - sonar component, 2 - rigid connection sleeve, 3 - flexible connection sleeve, 31 - inner tube, 32 - outer tube, 4 - sonar fixing component, 41 - sonar fixing body, 42 - clamping adjustment screw, 43 - elastic dowel pin, 431 - steel ball, 432 - housing, 433 - compression spring, 434 - rear cover, 435 - fixing screw, 5 - tail adaptive body, 51 - support tube, 52 - elastic sleeve, 6 - well tube. Detailed implementation manners
[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0025] In addition, in the invention, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are merely used to distinguish different elements, and the terms "upper", "lower", "left", "right" and other similar words are merely positional relationships in the drawings.
[0026] At present, in order to explore the cavity shape in domestic salt cavern gas storage or energy storage, it is necessary to run sonar cavity measurement equipment into old wells or newly drilled wells to scan the cavity. Considering that most old wells and some newly drilled wells are directional wells, there may be large well inclinations at the directional section or the outlet of the pipe shoe. Directly using cables to run sonar cavity measurement equipment is very likely to cause equipment obstruction. Therefore, there is an urgent need for an auxiliary tool that can cooperate with the sonar cavity measurement equipment to support the running of sonar equipment under complex working conditions.
[0027] like Figure 1 As shown, in the present application, by installing the sonar assembly 1 on a flexible and rigid connecting casing, the flexible casing can be bent along the inclination angle of the well pipe in some newly drilled wells and the directional section of the old wells in salt mines or near the casing shoe where the well inclination angle is large, thereby solving the problem that the cable belt sonar equipment is easily blocked in some newly drilled wells and the directional section of the old wells in salt mines or near the casing shoe where the well inclination angle is large. The following is an explanation through specific embodiments.
[0028] like Figure 1 As shown, an embodiment of the present application discloses a high-angle well auxiliary sonar cavity clamping tool, the clamping tool includes: a rigid connection casing 2, a flexible connection casing 3, a sonar fixing component 4 and a tail adaptive body 5, the rigid connection casing 2 and the flexible connection casing 3 are each provided with a plurality, and the plurality of rigid connection casings 2, the plurality of flexible connection casings 3 and the tail adaptive body 5 are arranged in sequence and fixedly connected to form a casing group; the sonar fixing component 4 is provided with a plurality, and the plurality of sonar fixing components 4 are arranged at specified intervals and inserted into the casing group, and the two ends of the sonar fixing component 4 are respectively fixedly connected to the rigid connection casing 2 or the flexible connection casing 3 on both sides thereof to form a clamping tool.
[0029] Exemplarily, the axial length of the rigid connection sleeve 2 and the axial length of the flexible connection sleeve 3 are both made equal to the arrangement pitch of the sonar fixing assembly 4. Based on the length requirement of the overall sleeve group, length compensation is performed on the rigid connection sleeve 2 or the flexible connection sleeve 3 at the first or last section, which can simplify the arrangement mode among the rigid connection sleeve 2, the flexible connection sleeve 3, and the sonar fixing assembly 4.
[0030] Exemplarily, the sonar fixing assemblies 4 are arranged at intervals of 20 cm, and the axial lengths of the rigid connection sleeve 2 and the flexible connection sleeve 3 are exactly 20 cm. By such an arrangement, the sonar fixing assemblies 4 and the rigid connection sleeve 2 can be arranged alternately, and the sonar fixing assemblies 4 and the flexible connection sleeve 3 can also be arranged alternately.
[0031] As Figure 1 shown, the sonar assembly 1 is inserted into the clamping tool from one end close to the rigid connection sleeve 2. After insertion, the sonar assembly 1 is fixed by a plurality of sonar fixing assemblies 4. On the other hand, the outer surface of the tail adaptor 5 is conical, and the tail adaptor 5 is made of an elastic material, and its shape will change with the pressure. Therefore, the tail adaptor 5 can effectively guide the entire clamping tool to smoothly enter and exit the well pipe 6. On the other hand, the tail adaptor 5 can act as a piston inside the well pipe 6. By installing a pumping device at the wellhead to push the piston, it can ensure that the downhole operation is completed by pumping at the wellhead in the case where the clamping tool cannot be lowered by itself at a large downhole slope. This structure can also ensure that the entire tool and the sonar detection cavity device are introduced into the well pipe 6, minimizing the occurrence of jamming to the greatest extent.
[0032] It should be noted that: the number and length of the rigid connection sleeves 2, and the number and length of the flexible connection sleeves 3 need to be adjusted according to different downhole actual situations. The greater the downhole slope, the shorter the length of a single flexible connection sleeve 3, so as to ensure that the bendable angle of the entire clamping tool is greater. Similarly, the interval between two adjacent sonar fixing assemblies 4 can also be adjusted according to different downhole actual situations. On the other hand, the greater the viscosity of the downhole liquid, the greater the resistance of the liquid to the sonar assembly 1, and the more sonar fixing assemblies 4 are required. Therefore, under the same length, if the clamping tool is assembled in the way of alternately connecting the rigid connection sleeves 2 and the sonar fixing assemblies 4 at intervals, the number of the rigid connection sleeves 2 is less. In addition, there are other situations affecting the number and length of the rigid connection sleeves 2, the flexible connection sleeves 3, and the sonar fixing assemblies 4, which are not listed one by one in this application. In this application, the number and length of the rigid connection sleeves 2, the flexible connection sleeves 3, and the sonar fixing assemblies 4 are not limited.
[0033] As Figure 2As shown, in an embodiment of the present invention, the sonar fixing assembly 4 includes a sonar fixing body 41, a clamping adjustment screw 42, and an elastic dowel pin 43. Among them, the clamping adjustment screw 42 is used to clamp the sonar assembly 1; the elastic dowel pin 43 is used to support the entire sonar fixing assembly 4 inside the well pipe 6; the sonar fixing body 41 serves as the main body of the entire sonar fixing assembly 4 and provides support for the clamping adjustment screw 42 and the elastic dowel pin 43; there are multiple clamping adjustment screws 42 and elastic dowel pins 43, and both are arranged at equal circumferential intervals. When the clamping adjustment screws 42 and the elastic dowel pins 43 are arranged in a circle, they should avoid each other. The clamping adjustment screws 42 and the elastic dowel pins 43 are both installed inside the sonar fixing body 41, and the sonar fixing body 41 is cylindrical; the clamping adjustment screw 42 is threadedly connected to the sonar fixing body 41, and the clamping adjustment screw 42 radially penetrates the entire sonar fixing body 41 starting from the outer ring surface of the sonar fixing body 41. After the clamping adjustment screw 42 rotates, it will move radially along the sonar fixing body 41, thereby fixing or loosening the sonar assembly 1; there are multiple radially distributed threaded holes inside the sonar fixing body 41, and the threaded holes penetrate the entire sonar fixing body 41. The threaded holes are used to connect the rigid connection sleeve 2 or the flexible connection sleeve 3.
[0034] As Figure 3 shown, in an embodiment of the present invention, the elastic dowel pin 43 includes: a steel ball 431, a housing 432, a compression spring 433, a rear cover 434, and a fixing screw 435. Among them, there is a through hole inside the housing 432, and the top bracket of the through hole gradually narrows. The steel column 431 is located at the top of the through hole, and the steel column 431 cannot pass through the top of the through hole. There is a compression spring 433 below the steel column 431, and a rear cover 434 is provided below the compression spring 433. The rear cover 434 is installed on the housing 432 through the fixing screw 435.
[0035] The cooperation of the steel ball 431 and the compression spring 433 enables the tool to slide freely inside the well pipe 6. At the same time, when encountering protrusions or uneven positions inside the well pipe 6, the compression spring 433 retracts under the action of pressure, so that the sonar clamping tool can pass smoothly through the retraction of the compression spring 433.
[0036] As Figure 4 shown, in an embodiment of the present invention, the tail adaptive body 5 includes a support pipe 51 and an elastic sleeve 52. The support pipe 51 is made of a rigid material, and the elastic sleeve 52 is sleeved on the support pipe 51. The elastic sleeve 52 is conical and deforms after being squeezed by the well pipe 6, so that the clamping tool can smoothly enter the well pipe 6. Inside the well pipe 6, the elastic sleeve 52 can act as a piston and cooperate with the pumping device to pump the clamping tool.
[0037] As Figure 5As shown, in an embodiment of the present invention, the rigid connection sleeve 2 includes a pipe body and connection bosses provided at two axial ends of the pipe body. Among them, the pipe body is a cylindrical pipe body structure, and the connection bosses are cylindrical sheet structures to serve as the flanges of the rigid connection sleeve 2. The connection bosses are integrally provided with the pipe body and are concentric with the pipe body. A plurality of through holes are provided on the connection bosses. Generally, the number of through holes is three, and the three through holes are circumferentially equidistantly distributed around the axis of the connection boss, and are used for connecting the rigid connection sleeves 2 to each other or for connecting the sonar fixing assembly 4.
[0038] As Figure 5 shown, in an embodiment of the present invention, the flexible connection sleeve 3 includes an inner pipe 31 and an outer pipe 32. One end of the inner pipe 31 is provided with a flange and the other end is provided with a spherical connection part, and one end of the outer pipe 32 is also provided with a flange and the other end is provided with a spherical groove connection part. Among them, the spherical connection part and the spherical groove connection part are fitted and connected to form a connection structure similar to a universal joint. Thus, after the inner pipe 31 and the outer pipe 32 are installed, the inner pipe 31 and the outer pipe 32 can both rotate radially along the spherical connection part. The main use of the flexible connection sleeve 3 in the clamping tool is to fix the sonar assembly 1 and its cable and steel cable. The flexible connection sleeve 3 simultaneously has the functions of bending and rotating, so as to have a certain supporting ability and moving space when the tool is retrieved outside the well pipe 6, and prevent the clamping tool from being stuck and restricted in movement.
[0039] Generally, due to the diameters of the inner pipe 31 and the outer pipe 32 being limited by the well pipe 6 and the sonar tool 1, the inner and outer diameters of the spherical connection part and the spherical groove connection part are both limited. After the inner pipe 31 and the outer pipe 32 are installed, the maximum rotation angle of the inner pipe 31 and the outer pipe 32 is 5-10°, and the inner pipe 31 or the outer pipe 32 can axially rotate 360° relative to each other.
[0040] Based on the above embodiments, this embodiment introduces a specific implementation method as follows:
[0041] On the ground, first insert the sonar component 1 from the front part of the sonar measurement cavity clamping tool (the end where the rigid sleeve 2 is located), and use the sonar fixing component 4 to fix the sonar component 1 and the sonar clamping tool to each other. The transmitting and signal capturing parts at the front of the sonar component 1 remain exposed in the front to prevent the sonar clamping tool from affecting the subsequent measurement cavity. Then, introduce the cable from the rear part of the sonar clamping tool (the end where the tail adaptive body 5 is located) and connect it to the sonar component 1. After the sonar component 1 and the sonar clamping tool are assembled, place the whole upside down and hang it on the winch pulley block of the logging truck to check whether the fixation between the sonar component 1 and the sonar clamping tool is firm. Check other connection parts to ensure that there are no problems with the data connection and other components. Then, slowly lower the equipment into the wellbore from the wellhead at a speed less than 0.3 m / s. If the suspended weight suddenly decreases during the lowering process, immediately stop lowering, slowly lift the cable to adjust the position of the tool and pass through the blocked point again. When lowering to a depth of 30 m above the casing shoe, reduce the lowering speed to 0.15 m / s until the tool extends out of the casing shoe. After the tool extends 10 m out of the casing shoe, lift the cable 20 m to test the anti-sticking effect of the tool at the casing shoe position. After the test, lower it again to the sonar measurement cavity depth for the official sonar measurement cavity. After the sonar measurement cavity is completed, slowly lift the tool. The lifting speed is less than 0.1 m / s below the casing shoe, and the lifting speed can be appropriately increased above the casing shoe, but not more than 0.2 m / s until the tool returns to the ground. After the tool is taken out of the wellhead, check whether the sonar component 1 and the sonar measurement cavity clamping tool are damaged. First, separate the cable from the sonar component 1 body, and then separate the sonar component 1 body and the sonar measurement cavity clamping tool. Put the sonar component 1 body, cable, sonar measurement cavity clamping tool, other accessories, etc. back into the toolbox and wait for the next use.
[0042] Finally, it should be noted that the above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An auxiliary sonar cavity measurement clamping tool for highly deviated wells, characterized in that, The clamping tool includes: a rigid connection sleeve (2), a flexible connection sleeve (3), a sonar fixing component (4), and a tail adaptive body (5). A plurality of rigid connection sleeves (2) and a plurality of flexible connection sleeves (3) are provided. The plurality of rigid connection sleeves (2), the plurality of flexible connection sleeves (3), and the tail adaptive body (5) are arranged in sequence and fixedly connected to form arrangement A. A plurality of sonar fixing components (4) are provided, and the plurality of sonar fixing components (4) are inserted into arrangement A at a specified interval. Both ends of the sonar fixing component (4) are fixedly connected to the rigid connection sleeve (2) or the flexible connection sleeve (3) on both sides thereof.
2. The auxiliary sonar cavity clamping tool for highly deviated wells according to claim 1, characterized in that, The arrangement spacing of the sonar fixing components (4) is equal to both the axial length of the rigid connection sleeve (2) and the axial length of the flexible connection sleeve (3).
3. The auxiliary sonar cavity measuring and clamping tool for highly deviated wells according to claim 1, characterized in that The sonar fixing component (4) includes a sonar fixing body (41), a clamping adjustment screw (42), and an elastic dowel pin (43). Among them, the clamping adjustment screw (42) and the elastic dowel pin (43) are both installed in the sonar fixing body (41), and the sonar fixing body (41) is in a cylindrical shape. The clamping adjustment screw (42) is threadedly connected to the sonar fixing body (41), and the clamping adjustment screw (42) radially penetrates the entire sonar fixing body (41) starting from the outer ring surface of the sonar fixing body (41).
4. The auxiliary sonar cavity measuring and clamping tool for highly deviated wells according to claim 3, characterized in that, A plurality of clamping adjustment screws (42) and a plurality of elastic dowel pins (43) are provided, and the clamping adjustment screws (42) and the elastic dowel pins (43) are both arranged at equal circumferential intervals.
5. A large-angle well auxiliary sonar cavity measurement clamping tool according to claim 3, characterized in that, A plurality of radially distributed threaded holes are provided in the sonar fixing body (41), and the threaded holes penetrate the entire sonar fixing body (41). The threaded holes are used to connect the rigid connection sleeve (2) or the flexible connection sleeve (3).
6. The auxiliary sonar cavity measuring and clamping tool for highly deviated wells according to claim 3, characterized in that The elastic dowel pin (43) includes: a steel ball (431), a housing (432), a compression spring (433), a rear cover (434), and a fixing screw (435). Among them, a through hole is provided inside the housing (432), and the top bracket of the through hole gradually narrows. The steel column (431) is located at the topmost end of the through hole, and the steel column (431) cannot pass through the top of the through hole. A compression spring (433) is provided below the steel column (431), and a rear cover (434) is provided below the compression spring (433). The rear cover (434) is installed on the housing (432) through the fixing screw (435).
7. A clamping tool for auxiliary sonar cavity measurement in highly deviated wells according to claim 1, characterized in that, The tail adaptive body (5) includes a support tube (51) and an elastic sleeve (52). The support tube (51) is made of a rigid material, and the elastic sleeve (52) is sleeved on the support tube (51). A tapered hole is provided inside the elastic sleeve (52).
8. A large-inclination well auxiliary sonar cavity measuring clamping tool according to claim 1, characterized in that The rigid connection sleeve (2) includes a tube body and connection bosses provided at both axial ends of the tube body. Among them, a plurality of through holes are provided on the connection bosses for connecting the rigid connection sleeves (2) to each other or for connecting the sonar fixing component (4).
9. The auxiliary sonar cavity measuring and clamping tool for highly deviated wells according to claim 1, wherein The flexible connection sleeve includes an inner tube (31) and an outer tube (32). One end of the inner tube (31) is provided with a flange and the other end is provided with a spherical connection part. One end of the outer tube (32) is also provided with a flange, and the other end is provided with a spherical groove connection part. The spherical connection part is embedded in the spherical groove connection part to connect the inner tube (31) and the outer tube (32).
10. The auxiliary sonar cavity measuring and clamping tool for highly deviated wells according to claim 9, characterized in that, After installation, the inner tube (31) and / or the outer tube (32) can rotate radially along the spherical connection part, and the maximum rotation angle is 5-10°.