A compression packer and a testing device for testing the tightness thereof

Abstract

The present application relates to a kind of compression packer and the testing device for testing its sealing property.Testing device includes the body, the compression component and the fixed component of the body spaced arrangement, the rubber tube being arranged between the compression component and the fixed component, and shoulder assembly.Packer is configured to be able to move towards fixed component, so as to extrude rubber tube, so that rubber tube can be set in casing.Shoulder assembly includes the first support ring being arranged between rubber tube and compression component, and the second support ring being arranged between rubber tube and fixed component, wherein, second support ring is configured to be able to engage with casing before first support ring in the process of setting in.The shoulder assembly of this full-cladding asymmetric design, not only can effectively protect and support rubber tube, avoid packer early setting in, improve the effect of anti-shoulder and pressure capacity, but also can make rubber tube even swell in the process of setting in, avoid the problem of rubber tube concave, to effectively improve the sealing property of rubber tube.

Description

Technical Field

[0001] This invention relates to the field of downhole packer technology, specifically to a compression packer and a testing device for testing its sealing performance. Background Technology

[0002] Existing compression packers generally include components such as a rubber sleeve, a shoulder mechanism, and a compression sleeve. Hydraulic pressure typically pushes the compression sleeve downwards, compressing the rubber sleeve and causing it to engage with the inner wall of the sleeve, thus achieving setting. The shoulder mechanism protects and supports the rubber sleeve at both ends. However, the shoulder mechanism may not fully enclose the rubber sleeve after setting, affecting its protective effect. Furthermore, existing technologies generally lack testing equipment for packers, making it difficult to evaluate the sealing performance after setting. Summary of the Invention

[0003] To address the aforementioned problems in the prior art, this invention provides a compression packer whose shoulder assembly can fully enclose the rubber tube after setting, thereby improving the protection of the rubber tube. Furthermore, this application also provides a testing device for testing and evaluating the sealing effect of the packer after setting.

[0004] A first aspect of the invention provides a compression packer, comprising a body, a compression assembly and a fixing assembly spaced apart on the body, a rubber sleeve disposed between the compression assembly and the fixing assembly, and a shoulder assembly. The compression assembly is configured to move toward the fixing assembly to compress the rubber sleeve, thereby enabling the rubber sleeve to set a sleeve. The shoulder assembly includes a first support ring disposed between the rubber sleeve and the compression assembly, and a second support ring disposed between the rubber sleeve and the fixing assembly. The second support ring is configured to engage with the sleeve prior to the first support ring during the setting process.

[0005] Furthermore, the first support ring includes a first ring base connected to the compression assembly, a first extension spaced apart from the first ring base, and a first intermediate portion disposed between the first ring base and the first extension, the first extension and the first intermediate portion covering the end of the rubber tube.

[0006] Furthermore, a first angle is formed between the first intermediate portion and the first annular base so that the first intermediate portion can deform toward the first annular base during the setting of the rubber sleeve, thereby enabling the first extension portion to finally engage with the inner wall of the sleeve.

[0007] Furthermore, the second support ring includes a second ring base connected to the fixing assembly, and a second intermediate portion connected to the second ring base, wherein the second intermediate portion and the second ring base are configured to form a second angle. The second angle is smaller than the first angle, so that the second support ring can engage with the sleeve before the first support ring during the setting process.

[0008] Furthermore, the second support ring also includes a second extension that together with the second intermediate portion wraps around the rubber tube, the second extension being configured to engage with the inner wall of the sleeve after deforming in the direction of the second intermediate portion toward the second ring base.

[0009] Furthermore, the second extension and the second intermediate portion are provided with a second reinforcing portion, and a first reinforcing portion is provided between the first extension and the first intermediate portion.

[0010] Furthermore, a protruding ring is provided between the rubber sleeve and the body, which is used to cause the rubber sleeve to deform from the protruding ring during setting.

[0011] Furthermore, the distance between the convex ring and the first support ring is less than the distance between the convex ring and the second support ring.

[0012] A second aspect of the present invention provides a testing apparatus for testing the sealing performance of a compression packer as described in any of the preceding claims after setting, comprising a setting cylinder coaxially arranged with the body, and a first end cap and a second end cap disposed at both ends of the setting cylinder. The first end cap is configured to, after the packer is installed in the testing apparatus, jointly define a hydraulic chamber with the compression assembly and the setting cylinder. The setting cylinder is configured to, after the packer is set, jointly define a first chamber with the compression assembly and the rubber sleeve, and jointly define a second chamber with the second end cap and the rubber sleeve.

[0013] Furthermore, the testing device also includes a second through hole communicating with the first chamber and a third through hole communicating with the second chamber, so as to test the sealing performance of the packer in the forward or reverse direction by injecting pressurized fluid into the first chamber or the second chamber.

[0014] The beneficial effects of this invention lie in providing a compression packer and a testing device for testing its sealing performance. The packer includes a body, a compression assembly and a fixing assembly spaced apart on the body, a rubber sleeve disposed between the compression assembly and the fixing assembly, and a shoulder assembly. The compression assembly is configured to move toward the fixing assembly to compress the rubber sleeve, enabling the rubber sleeve to set the sleeve. The shoulder assembly includes a first support ring disposed between the rubber sleeve and the compression assembly, and a second support ring disposed between the rubber sleeve and the fixing assembly. The second support ring is configured to engage with the sleeve before the first support ring during the setting process. This fully enclosed, asymmetrically designed shoulder assembly not only effectively protects and supports the rubber sleeve, preventing premature setting of the packer and improving anti-shoulder protrusion effect and pressure resistance, but also allows the rubber sleeve to expand evenly during the setting process, avoiding the problem of rubber sleeve concavity, thereby effectively improving the sealing performance of the rubber sleeve. Furthermore, the testing device provided in this application can simulate the packer setting process and verify the forward and reverse sealing performance of the rubber sleeve. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 The image shows a cross-sectional view of a compression packer in a casing.

[0017] Figure 2 As shown Figure 1 The diagram shows a cross-sectional view of the first support ring of the packer before setting.

[0018] Figure 3 As shown Figure 1 A cross-sectional view of the second support ring of the packer before setting.

[0019] Figure 4 As shown Figure 1 The packer shown is a cross-sectional view of its structure in the test setup.

[0020] In the figures, the following reference numerals are used: 100, packer; 10, body; 11, anti-retraction groove; 20, compression assembly; 21, compression sleeve; 22, hydraulic chamber; 23, anti-retraction snap ring; 30, fixing assembly; 31, retaining ring; 32, straightening ring; 33, limiting ring; 40, rubber sleeve; 41, convex ring; 42, convex part; 43, first part; 44, second part; 50, shoulder protector assembly; 51, first support ring; 511, first ring base; 512, first extension; 513, first intermediate part; 514, first reinforcing part; 52, second support ring; 521, second ring base; 522, second extension; 523, second intermediate part; 524, second reinforcing part; 200. Testing device; 60. Setting tube; 61. First chamber; 62. Second chamber; 70. First end cap; 80. Second end cap; 90. Plug; 201. First through hole; 202. Second through hole; 203. Third through hole; 300, sleeve. Detailed Implementation

[0021] To make the technical problem to be solved, the technical solution, and the beneficial effects of this invention clearer, the invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the invention, and therefore only shows the components relevant to the invention. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] refer to Figure 1 As shown, the present invention provides a compression packer 100 including a body 10, a compression assembly 20 and a fixing assembly 30 arranged at intervals on the body 10, and a rubber cylinder 40 disposed between the compression assembly 20 and the fixing assembly 30. The compression assembly 20 is configured to move toward the fixing assembly 30 under the action of hydraulic pressure or other forces, so as to compress the rubber cylinder 40, causing the rubber cylinder 40 to deform radially outward until it seals against the inner wall of the sleeve 300. This allows the packer 100 to complete setting. The fixing assembly 30 is configured to be fixedly connected to the body 10 so that the fixing assembly 30 can provide sufficient axial support for the rubber cylinder 40 when the compression assembly 20 moves, ensuring that the rubber cylinder 40 can deform radially outward.

[0023] The packer 100 also includes shoulder assemblies 50 disposed at both ends of the rubber sleeve 40. The shoulder assembly 50 includes a first support ring 51 disposed between the compression assembly 20 and the rubber sleeve 40, and a second support ring 52 disposed between the rubber sleeve 40 and the fixing assembly 30. Both the first support ring 51 and the second support ring 52 are capable of engaging with the inner wall of the sleeve 300 after the packer 100 has completed setting, thereby improving the protective effect of the shoulder assembly 50 on the rubber sleeve 40 after setting. Specifically, the second support ring 52 is configured to engage with the inner wall of the sleeve 300 before the first support ring 51 during the setting process of the packer 100, so that the rubber sleeve 40 can be uniformly expanded and sealed. It should be understood that, in this application, unless otherwise stated, the term "engagement" includes, but is not limited to, direct contact between two components, connection via an intermediate component, or forming a force-transmitting connection.

[0024] Combination Figure 1As shown, in some embodiments, the compression assembly 20 includes a compression sleeve 21 fitted onto the body 10. For example... Figure 4 As shown, a hydraulic chamber 22 is provided at the end of the compression sleeve 21 away from the rubber sleeve 40, so that the compression sleeve 21 can be subjected to the action of hydraulic fluid in the hydraulic chamber 22. It should be understood that, apart from the compression sleeve 21, other components or structures on the packer 100 that form the hydraulic chamber 22 can be selected or set by those skilled in the art as needed.

[0025] In some preferred embodiments, a sealing ring is provided between the compression sleeve 21 and the body 10 to enhance the sealing between the compression sleeve 21 and the body 10.

[0026] Combination Figure 4 As shown, in some preferred embodiments, an anti-retraction spring 23 is provided on the inner wall of the compression sleeve 21, which engages with the anti-retraction groove 11 on the body 10 after the compression sleeve 21 has moved a certain distance toward the fixing assembly 30. In this way, the compression sleeve 21 will not move in the opposite direction under the elastic action of the rubber sleeve 40, ensuring that the packer 100 remains in the set state after setting.

[0027] Combination Figure 1 and Figure 4 As shown, in some embodiments, the fixing component 30 includes a retaining ring 31 disposed on the body 10, a straightening ring 32 connected to the retaining ring 31, and a limiting ring 33 disposed between the straightening ring 32 and the body 10. The retaining ring 31 can be connected to the straightening ring 32 by threads or a pin. The limiting ring 33 can be embedded in the body 10 in a radially inward direction to axially limit the retaining ring 31 and the straightening ring 32. Specifically, the portion of the retaining ring 31 located outside the body 10 can abut against the lower end face of the retaining ring 31 and the stepped surface on the inner wall of the straightening ring 32 in the axial direction, thereby allowing the limiting ring 33 to axially limit the retaining ring 31 and the straightening ring 32.

[0028] Combination Figure 1 As shown, in some embodiments, a protruding ring 41 is provided between the rubber sleeve 40 and the body 10 in a radially outward direction, which is used to enable the rubber sleeve 40 to deform radially outward from the position of the protruding ring 41 during setting.

[0029] In some embodiments, the convex ring 41 may be located at the middle position of the rubber sleeve 40.

[0030] In some preferred embodiments, the distance between the convex ring 41 and the first support ring 51 is less than the distance between the convex ring 41 and the second support ring 52. Thus, the effective length of the first portion 43 of the rubber sleeve 40 located between the convex ring 41 and the first support ring 51 is less than the effective length of the second portion 44 located between the convex ring 41 and the second support ring 52, so that the stiffness of the first portion 43 is greater than that of the second portion 44, ensuring that the second portion 44 is more prone to deformation. Therefore, this structural asymmetry created by the convex ring 41 allows the second portion 44 to achieve a sealing fit with the inner wall of the sleeve 300 before the first portion 43 during the setting process, thereby achieving uniform expansion sealing of the packer 100.

[0031] In one specific embodiment, the distance between the convex ring 41 and the first support ring 51 is 58 mm. The distance between the convex ring 41 and the second support ring 52 is 64 mm.

[0032] Combination Figure 2 and Figure 3 As shown, in some preferred embodiments, the inner walls at both ends of the rubber sleeve 40 are provided with protrusions 42 extending into the body 10, which are used to enhance the sealing between the rubber sleeve 40 and the body 10 when the packer 100 is in the set-sealing state.

[0033] Combination Figure 1 and Figure 2 As shown, in some embodiments, the first support ring 51 includes a first ring base 511 connected to the compression sleeve 21, a first extension 512 spaced apart from the first ring base 511, and a first intermediate portion 513 disposed between the first ring base 511 and the first extension 512. Both the first extension 512 and the first intermediate portion 513 cover the surface of the upper end of the glue tube 40 to protect the upper end of the glue tube 40. The first intermediate portion 513 is configured to deform towards the first ring base 511 during the setting process. This ensures that the first extension 512 and the first intermediate portion 513 always wrap around the upper end of the glue tube 40 after setting, thus protecting the upper end of the glue tube 40. Furthermore, it prevents the end of the first extension 512 from piercing into the glue tube 40 when it deforms, thereby ensuring the integrity of the glue tube 40.

[0034] In some embodiments, the first ring base 511 can be connected to the compression sleeve 21 by a set screw, so that the first support ring 51 can move with the compression sleeve 21 toward the fixing assembly 30. Preferably, the end face of the first ring base 511 is flush with the end face of the compression sleeve 21, so that the first intermediate portion 513 can fit against the end faces of the first ring base 511 and the compression sleeve 21 after setting. More preferably, the connection between the first ring base 511 and the first intermediate portion 513 should be reinforced, for example, by increasing the thickness of the connection, so as to prevent the first intermediate portion 513 from breaking off from the first ring base 511 due to deformation, thereby ensuring the protection of the upper end of the glue tube 40.

[0035] In some embodiments, the first intermediate portion 513 forms a first angle with the end face of the first ring base 511 before setting, so that the first intermediate portion 513 can deform in the direction of the first ring base 511 during the setting process. Specifically, the first angle can be 40° or other degrees.

[0036] Combination Figure 2 As shown, in some preferred embodiments, a first reinforcing portion 514 is further provided between the first intermediate portion 513 and the first extension portion 512. The strength of the first reinforcing portion 514 is greater than the strength of the first intermediate portion 513, so as to prevent the first reinforcing portion 514 from deforming before the first intermediate portion 513. Similarly, the strength of the first reinforcing portion 514 is greater than the strength of the first extension portion 512. In this way, the first extension portion 512, the first intermediate portion 513, and the first reinforcing portion 514 can always fully wrap the upper end of the rubber tube 40 during the setting process.

[0037] In one specific embodiment, the thickness of the first reinforcing portion 514 is greater than the thickness of the first intermediate portion 513 and the first extension portion 512. The thickness of the first intermediate portion 513 remains constant from the first reinforcing portion 514 to the first annular base 511. The thickness of the first extension portion 512 gradually decreases from the first reinforcing portion 514 to the end of the first extension portion 512. This allows the first extension portion 512 to deform along with the deformation of the rubber sleeve 40 during the setting process, thus preventing the first extension portion 512 from piercing into the rubber sleeve 40. Furthermore, after setting, the side of the first extension portion 512 facing away from the rubber sleeve 40 can engage with the inner wall of the sleeve 300, thereby fully protecting the upper end of the rubber sleeve 40.

[0038] Combination Figure 1 and Figure 3As shown, in some embodiments, the second support ring 52 includes a second ring base 521 connected to the retaining ring 31, a second extension 522 spaced apart from the second ring base 521, and a second intermediate portion 523 disposed between the second ring base 521 and the second extension 522. Both the second extension 522 and the intermediate portion 523 cover the surface of the lower end of the glue tube 40 to protect the lower end of the glue tube 40. The second intermediate portion 523 is configured to deform towards the second ring base 521 during the setting process. This ensures that the second extension 522 and the intermediate portion 523 always wrap around the lower end of the glue tube 40 after setting, thus protecting the lower end of the glue tube 40. Furthermore, it prevents the end of the second extension 522 from piercing into the glue tube 40 when it deforms, thereby ensuring the integrity of the glue tube 40.

[0039] In some embodiments, the second ring base 521 can also be connected to the retaining ring 31 by a set screw. The end face of the second ring base 521 is flush with the end face of the retaining ring 31 so that the second intermediate portion 523 can fit against the end faces of the second ring base 521 and the retaining ring 31 after setting. Preferably, the connection between the second ring base 521 and the second intermediate portion 523 is also reinforced, for example, by increasing the thickness of the connection, so as to prevent the second intermediate portion 523 from breaking off from the second ring base 521 due to deformation, thereby ensuring the protection of the lower end of the rubber sleeve 40.

[0040] In some embodiments, the second intermediate portion 523 forms a second angle with the end face of the second annular base 521 before setting, so that the second intermediate portion 523 can deform towards the second annular base 521 during the setting process. The second angle should be smaller than the first angle so that the second support ring 52 can engage with the inner wall of the sleeve 300 before the first support ring 51 during the setting process. In this way, the problem of concavity of the rubber sleeve 40 can be effectively avoided during the setting process, ensuring that the rubber sleeve 40 is in full contact with the inner wall of the sleeve 300, thereby achieving uniform expansion and sealing of the packer 100 and ensuring the sealing effect. If the first support ring 51 engages with the inner wall of the sleeve 300 before the second support ring 52, the friction between the first support ring 51 and the sleeve 300 will hinder the movement of the compression sleeve 21 and affect the subsequent setting. Furthermore, this can lead to uneven stress on the upper and lower ends of the rubber sleeve 40, preventing the rubber sleeve 40 from making sufficient contact with the inner wall of the sleeve 300, and consequently preventing the packer 100 from expanding and sealing evenly.

[0041] In some specific embodiments, the second angle can be 30°, or it can be any other degree smaller than the first angle.

[0042] In some preferred embodiments, a second reinforcing portion 524 is further provided between the second intermediate portion 523 and the second extension portion 522. The strength of the second reinforcing portion 524 is greater than that of the second intermediate portion 523 to prevent the second reinforcing portion 524 from deforming before the second intermediate portion 523. Similarly, the strength of the second reinforcing portion 524 is greater than that of the second extension portion 522. In this way, the second extension portion 522, the second intermediate portion 523, and the second reinforcing portion 524 can always fully cover the lower end of the rubber tube 40 during the setting process.

[0043] In one specific embodiment, the thickness of the second reinforcing portion 524 is greater than the thickness of the second intermediate portion 523 and the second extension portion 522. The thickness of the second intermediate portion 523 remains constant from the second reinforcing portion 524 to the second ring base 521. The thickness of the second extension portion 522 gradually decreases from the second reinforcing portion 524 to the end of the second extension portion 522. This allows the second extension portion 522 to deform along with the deformation of the rubber sleeve 40 during the setting process, preventing it from piercing into the rubber sleeve 40. Furthermore, after setting, the side of the second extension portion 522 facing away from the rubber sleeve 40 can fit against the inner wall of the sleeve 300, thus adequately protecting the lower end of the rubber sleeve 40.

[0044] The following is combined with Figures 1-3 The setting process of the packer 100 provided in this application is described in detail.

[0045] After the compression sleeve 21 is subjected to the hydraulic pressure in the hydraulic chamber 22, the compression sleeve 21 pushes the first support ring 51 toward the fixing assembly 30. Therefore, the first support ring 51 and the second support ring 52 apply force to the rubber sleeve 40 from both ends. Since the convex ring 41 creates a structural weak point on the rubber sleeve 40, the rubber sleeve 40 begins to deform from the convex ring 41. Furthermore, since the stiffness of the first part 43 of the rubber sleeve 40 is greater than that of the second part 44, the second part 44 of the rubber sleeve 40 will make contact with the inner wall of the sleeve 300 faster than the first part 43.

[0046] Simultaneously, during the deformation of the second part 44 of the rubber sleeve 40, the second extension 522 of the second support ring 52 deforms and gradually approaches the inner wall of the sleeve 300, while the second middle part 523 deforms and approaches the end of the retaining ring 31. This continues until the second middle part 523 contacts the end of the retaining ring 31, and the second extension 522 engages with the inner wall of the sleeve 300.

[0047] While the second part 44 of the rubber sleeve 40 deforms, the first part 43 of the rubber sleeve 40 also deforms. The first extension 512 of the first support ring 51 deforms along with the first part 43 and gradually approaches the inner wall of the sleeve 300, while the first intermediate part 513 deforms and approaches the end face of the compression sleeve 21. This continues until the first intermediate part 513 contacts the end face of the compression sleeve 21, and the first extension 512 engages with the inner wall of the sleeve 300. Because the rigidity of the first part 43 of the rubber sleeve 40 is greater than that of the second part 44, and the first angle is greater than the second angle, the first support ring 51 engages with the inner wall of the sleeve 300 later than the second support ring 52. This effectively ensures that the rubber sleeve 40 makes sufficient sealing contact with the inner wall of the sleeve 300, ensuring uniform expansion and sealing of the packer 100.

[0048] Based on the packer 100 described above, this application also provides a testing device 200 for testing the sealing performance of the packer 100 after setting.

[0049] Combination Figure 4 As shown, in some embodiments, the test apparatus 200 includes a setting sleeve 60 coaxially arranged with the body 10, a first end cap 70 and a second end cap 80 respectively disposed at both ends of the setting sleeve 60, and plugs 90 sealed at both ends of the body 10. The setting sleeve 60 is used to simulate the downhole casing 300. After the packer 100 is installed in the test apparatus 200, the body 10 and compression sleeve 21 of the packer 100, together with the setting sleeve 60 and the first end cap 70 of the test apparatus 200, define the hydraulic chamber 22.

[0050] In some embodiments, the test device 200 is provided with a first through hole 201 communicating with the hydraulic chamber 22 for injecting hydraulic fluid into the hydraulic chamber 22.

[0051] In this embodiment, the first through hole 201 is provided on the first end cap 70.

[0052] In some embodiments, the test device 200 is further provided with a second through hole 202 and a third through hole 203 arranged at intervals. After the packer 100's rubber sleeve 40 sets the setting cylinder 60, and the first support ring 51 and the second support ring 52 engage with the inner wall of the setting cylinder 60, the setting cylinder 60, the compression sleeve 21, and the rubber sleeve 40 together define a first chamber 61 communicating with the second through hole 202, while the rubber sleeve 40, the second end cap 80, and the setting cylinder 60 together define a second chamber 62 communicating with the third through hole 203.

[0053] In this embodiment, the second through hole 202 is provided on the set-top cylinder 60, and the third through hole 203 is provided on the second end cap 80.

[0054] In some embodiments, after the packer 100 has been set, pressurized fluid can be injected into the first chamber 61 through the second through-hole 202 while keeping the third through-hole 203 open to test the forward sealing performance of the packer 100. Alternatively, pressurized fluid can be injected into the second chamber 62 through the third through-hole 203 while keeping the second through-hole 202 open to test the reverse sealing performance of the packer 100.

[0055] In some preferred embodiments, the pressure fluid may be heat transfer oil. Furthermore, the sealing performance of the packer 100 under high-temperature conditions can be tested by wrapping a heating tape around the setting cylinder 60.

[0056] It should be understood that the test apparatus 200 can test not only the sealing performance of the packer 100 after setting, but also other compatible packers.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0059] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A compression packer, comprising: Ontology(10); Compression components (20) and fixing components (30) are arranged at intervals on the body (10); A rubber sleeve (40) is disposed between the compression assembly (20) and the fixing assembly (30), the compression assembly (20) being configured to move toward the fixing assembly (30) to compress the rubber sleeve (40) such that the rubber sleeve (40) can seat the sleeve (300); and The shoulder support assembly (50) includes a first support ring (51) disposed between the rubber sleeve (40) and the compression assembly (20), and a second support ring (52) disposed between the rubber sleeve (40) and the fixing assembly (30). in, The second support ring (52) is configured to engage with the sleeve (300) before the first support ring (51) during the setting process.

2. The compression packer according to claim 1, characterized in that, The first support ring (51) includes a first ring base (511) connected to the compression assembly (20), a first extension (512) spaced apart from the first ring base (511), and a first intermediate portion (513) disposed between the first ring base (511) and the first extension (512), the first extension (512) and the first intermediate portion (513) covering the end of the rubber tube (40).

3. The compression packer according to claim 2, characterized in that, The first intermediate portion (513) and the first ring base (511) are formed at a first angle so that the first intermediate portion (513) can deform toward the first ring base (511) during the setting of the rubber sleeve (40), thereby enabling the first extension (512) to finally engage with the inner wall of the sleeve (300).

4. The compression packer according to claim 3, characterized in that, The second support ring (52) includes a second ring base (521) connected to the fixing assembly (30), and a second intermediate portion (523) connected to the second ring base (521), wherein the second intermediate portion (523) and the second ring base (521) are configured to form a second angle. The second angle is smaller than the first angle so that the second support ring (52) can engage with the sleeve (300) before the first support ring (51) during the setting process.

5. The compression packer according to claim 4, characterized in that, The second support ring (52) also includes a second extension (522) that together with the second intermediate portion (523) wraps the rubber tube (40), the second extension (522) being configured to engage with the inner wall of the sleeve (300) after deforming in the direction of the second intermediate portion (523) toward the second ring base (521).

6. The compression packer according to claim 5, characterized in that, The second extension (522) and the second intermediate part (523) are provided with a second reinforcing part (524), and a first reinforcing part (514) is provided between the first extension (512) and the first intermediate part (513).

7. The compression packer according to any one of claims 1-6, characterized in that, A protruding ring (41) is provided between the rubber tube (40) and the body (10) for causing the rubber tube (40) to deform from the protruding ring (41) during setting.

8. The compression packer according to claim 7, characterized in that, The distance between the convex ring (41) and the first support ring (51) is less than the distance between the convex ring (41) and the second support ring (52).

9. A testing device, characterized in that, The test for the sealing performance of the compression packer (100) according to any one of claims 1-8 after setting includes, A sealing sleeve (60) is arranged coaxially with the body (10); and The first end cap (70) and the second end cap (80) are disposed at both ends of the setter tube (60). The first end cap (70) is configured to define a hydraulic chamber (22) together with the compression assembly (20) and the setting cylinder (60) after the packer (100) is installed in the test device (200). The setting cylinder (60) is configured to define a first chamber (61) together with the compression assembly (20) and the rubber sleeve (40) after the packer (100) is set, and to define a second chamber (62) together with the second end cap (80) and the rubber sleeve (40).

10. The testing apparatus according to claim 9, characterized in that, The test apparatus (200) further includes a second through hole (202) communicating with the first chamber (61) and a third through hole (203) communicating with the second chamber (62) to test the sealing performance of the packer (100) in either the forward or reverse direction by injecting pressurized fluid into the first chamber (61) or the second chamber (62).

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