Hydraulic compression type packer ground pressure test device
By adopting a pressure test device with support rod and jaw structure, the joint between the chamfer of the end of the packer rubber sleeve and the adjacent rigid body is directly snapped into, and the jaws are tightened by the adjustment part, the problems of poor versatility and inconvenient operation of the existing pressure test device are solved, and the ground pressure test detection suitable for different types of packers is achieved and the effect of simplifying assembly operations is achieved.
Patent Information
- Application Number
- CN202422289103.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing hydraulic compression packer floor pressure test device has poor versatility and inconvenient operation, and cannot be used for different types of packers, and is complex in assembly and operation.
Using a pressure test device with a support rod and a jaw structure, the jaw directly snaps into the joint between the chamfer of the end of the packer rubber sleeve and the adjacent rigid body from the outside. The jaws are pushed tightly on the adjacent rigid bodies at both ends of the packer rubber sleeve through the adjustment parts to achieve pressure test.
It improves the versatility of the pressure test device and can be used for ground pressure testing of different types of packers, simplifies the assembly and operation process, and reduces the difficulty of operation.
Smart Images
Figure CN223037321U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of seal detection of matching tools for oil and water wells, in particular to a ground pressure test device for a hydraulic compression packer. Background Art
[0002] Before the downhole process string of oil and water wells is lowered into the well, it is necessary to conduct a ground pressure test on the sealing performance of tools such as packers. Only through the pressure test and verification that the sealing performance meets the requirements can the tools be used on site. Based on the structural design principle of common hydraulic compression packers such as Y341 and Y241, when pressure is applied to the packer, the setting shear pins are cut off, the setting piston moves upward and pushes the adjacent rigid body (i.e., the rubber sleeve seat) at the lower end of the packer rubber sleeve upward, squeezing the packer rubber sleeve to cause radial deformation, thereby realizing setting. At present, the pressure test device used for ground pressure test of common hydraulic compression packers such as Y341 and Y241 usually has a structural design of a sleeve plus a clamp. The sleeve is formed by threaded connection of two sleeve segments. There are two clamps. One axial end of the clamp has an internal chamfer structure. During use, the sleeve and the two clamps are sleeved on the outside of the packer. The two clamps are respectively located at the two axial ends of the sleeve. The internal chamfer parts of the two clamps are respectively stuck at the joint of the 45° chamfer at both ends of the packer rubber sleeve and the adjacent rigid body. Then, the sleeve segment is rotated to adjust the length of the sleeve until it can no longer be rotated, and the two clamps are tightened against the adjacent rigid bodies at both ends of the packer rubber sleeve. After the assembly is completed, pressure is applied to the packer. Since the pressure test device tightly supports between the two rigid bodies at both ends of the packer rubber sleeve, the two rigid bodies at both ends of the packer rubber sleeve cannot approach each other, which can limit the upward movement of the setting piston, thereby avoiding the accidental setting of the packer rubber sleeve caused by extrusion deformation and ensuring the realization of sealing detection.
[0003] When using this pressure test device for sealing detection, there are certain requirements for the outer diameter of the tested packer. It is required that the outer diameter of the tested packer is compatible with the inner diameter of the pressure test device. If the outer diameter of the tested packer is larger than the inner diameter of the pressure test device, the pressure test device cannot be sleeved on and the detection cannot be carried out. If the outer diameter of the tested packer is much smaller than the inner diameter of the pressure test device, the pressure test device cannot be stuck on the packer after being sleeved, and the detection cannot be carried out either. Therefore, the versatility of this pressure test device is poor, and a pressure test device with a size matching its own needs to be designed separately for different models of packers. In addition, when assembling this pressure test device onto the packer, it is necessary to sleeve the sleeve on the outside of the packer, respectively stick the two clamps at the joint of the 45° chamfer at both ends of the packer rubber sleeve and the adjacent rigid body, and then rotate the sleeve to adjust the length of the sleeve. When rotating the sleeve, since the outer diameter of the sleeve is much larger than the outer diameter of the packer, a particularly large pipe wrench is required for operation. Therefore, there are also problems of inconvenient assembly and operation. Content of the Utility Model
[0004] The purpose of the present utility model is to provide a ground pressure test device for a hydraulic compression packer, so as to solve the problems of poor versatility and inconvenient operation of the existing pressure test devices.
[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:
[0006] A ground pressure test device for a hydraulic compression packer includes a support rod and two claws that are used to be sleeved on the support rod at intervals. The claws have a clamping part for clamping into the joint part between the end chamfer of the packer rubber sleeve and the adjacent rigid body. At least one claw is movably sleeved on the support rod, and an adjusting part is threadedly sleeved on the support rod. When the adjusting part is rotated, the two claws can be directly or indirectly pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve; or an adjusting part with adjustable length is sleeved outside the support rod, and after the length of the adjusting part is adjusted in place, the two claws can be pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve respectively.
[0007] Further, one of the two claws is a movable claw that is movably sleeved on the support rod, and the other is a fixed claw that is fixedly sleeved on the support rod. The adjusting part is threadedly sleeved on the support rod. When the adjusting part is rotated, the adjusting part moves axially along the support rod and presses the movable claw against the adjacent rigid body at one end of the packer rubber sleeve, and at the same time, the fixed claw is pressed against the adjacent rigid body at the other end of the packer rubber sleeve.
[0008] Further, the adjusting part includes an adjusting nut and an adjusting ring. The adjusting nut is threadedly sleeved on the support rod, and the adjusting ring is movably sleeved on the support rod. When the adjusting nut is rotated, the adjusting nut moves axially along the support rod and pushes the adjusting ring to press the adjusting ring against the movable claw.
[0009] Further, both claws are non-rotatably sleeved on the support rod.
[0010] Further, the support rod includes a first rod section and a second rod section. The cross sections of the first and second rod sections are both runway-shaped. Both claws are provided with runway-shaped mounting holes, and the two claws are non-rotatably sleeved on the first and second rod sections respectively through the runway-shaped mounting holes.
[0011] Further, the clamping part is arc-shaped.
[0012] Further, a limiting structure is provided on the support rod for limiting the installation position of the fixed claw on the support rod.
[0013] Further, a limiting shoulder is provided on the outer peripheral surface of the support rod. The limiting shoulder forms an axial stop with the fixed claw to limit the installation position of the fixed claw on the support rod, and the limiting shoulder constitutes the limiting structure.
[0014] Further, stop structures are respectively provided at positions close to both ends of the support rod. The stop structures are used for cooperating with the corresponding end claws in a stop manner after the corresponding end claws are sleeved on the support rod to prevent the claws from disengaging from the support rod.
[0015] Further, the stop structure is a stop screw threadedly installed on the support rod.
[0016] Beneficial effects: The present utility model is a pioneering invention. Two claws are sleeved on the support rod at intervals. The two claws are respectively used for clamping into the joints between the chamfers at both ends of the packer rubber sleeve and the adjacent rigid bodies. At least one claw is movably sleeved on the support rod, so that the distance between the two claws can be adjusted. An adjusting member is threadedly sleeved on the support rod. By rotating the adjusting member, the two claws can be directly or indirectly pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve respectively, or an adjusting member with adjustable length is sleeved outside the support rod. After the length of the adjusting member is adjusted in place, the two claws can be respectively pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve. Since the two claws are directly clamped into the joints between the chamfers at both ends of the packer rubber sleeve and the adjacent rigid bodies from the outside and do not need to be sleeved outside the packer, and the support rod also does not need to be sleeved outside the packer, the size of the pressure test device is not affected by the outer diameter size of the packer, and there is no requirement for the outer diameter of the tested packer. Therefore, it can be applied to the ground pressure test detection of different types of packers, improving the versatility. When assembling the pressure test device onto the packer, the two claws can be directly clamped into the joints between the chamfers at both ends of the packer rubber sleeve and the adjacent rigid bodies. It is not necessary to sleeve each component of the pressure test device onto the packer respectively. When rotating the adjusting member, since the adjusting member is a component sleeved outside the support rod, the radial dimension of the support rod itself is not limited by the outer diameter of the packer, making the radial dimension of the support rod itself relatively small. Therefore, the radial dimension of the adjusting member is also relatively small, and it can be operated with a small pipe wrench. Therefore, the overall assembly and operation of the pressure test device are more convenient. Description of the Drawings
[0017] Figure 1 It is a cross-sectional view of the ground pressure test device for the hydraulic compression type packer of the present utility model;
[0018] Figure 2 It is a schematic structural view of the claw in the ground pressure test device for the hydraulic compression type packer of the present utility model;
[0019] Figure 3 It is a schematic view of connecting three ground pressure test devices for the hydraulic compression type packer into a whole through a steel wire rope;
[0020] Figure 4 It is a schematic structural view of three ground pressure test devices for the hydraulic compression type packer arranged at intervals circumferentially outside the packer;
[0021] Figure 5Schematic diagram of the hydraulic compression packer ground pressure test device in the state of clamping the packer;
[0022] In the figure: 1. Support rod; 1-1. First rod section; 1-2. Intermediate rod section; 1-3. External thread section; 1-4. Second rod section; 1-5. First limiting shoulder; 1-6. Second limiting shoulder; 2. Movable claw; 2-1. Mounting hole; 2-2. Clamping part; 2-3. Clamping surface; 3. Fixed claw; 4. Adjusting ring; 5. Adjusting nut; 6. Stop screw; 7. Steel wire rope; 8. Packer rubber sleeve; 9. Rigid body. Specific implementation mode
[0023] Before the packer is lowered into the well, it needs to be subjected to ground pressure test detection. The existing pressure test devices need to be sleeved outside the packer during use. Therefore, it is required that the outer diameter of the tested packer and the inner diameter of the pressure test device must match in order to carry out the pressure test detection. If the outer diameter of the tested packer is larger than the inner diameter of the pressure test device or the outer diameter of the tested packer is much smaller than the inner diameter of the pressure test device, the pressure test device cannot be used, resulting in poor versatility of the existing pressure test devices. At the same time, there are also problems of inconvenient operation. To solve the above problems existing in the existing pressure test devices, the present utility model provides a brand-new hydraulic compression packer ground pressure test device.
[0024] The basic inventive concept of the present utility model is as follows: The whole pressure test device is no longer sleeved outside the packer, but adopts a structure form of a support rod plus two claws, so that the two claws directly clamp from the outside at the clamping part of the chamfer at the end of the packer rubber sleeve and the joint with the adjacent rigid body, and by setting adjusting parts, the clamping parts of the two claws are respectively tightened against the adjacent rigid bodies at both ends of the packer rubber sleeve by operating the adjusting parts. In this way, there is no sleeving relationship between the pressure test device and the packer, and the size of the pressure test device can be not limited by the outer diameter size of the packer, so as to be applicable to the ground pressure test detection of different types of packers, improving the versatility. The size of the pressure test device is reduced, and the operation is also more convenient.
[0025] Based on the above inventive concept, the embodiments of the utility model hydraulic compression packer ground pressure test device are introduced in detail below:
[0026] As Figure 1 、 Figure 5As shown in the figure, the hydraulic compression packer ground pressure test device (hereinafter referred to as the pressure test device) includes components such as a support rod 1, a claw, and an adjusting member. The support rod 1 serves as the installation base for components such as the claw and the adjusting member. There are two claws, and the two claws are sleeved on the support rod 1 at intervals. The claw has a clamping portion 2-2 for clamping into the joint between the end chamfer of the packer rubber sleeve 8 and the adjacent rigid body 9. The clamping portion 2-2 has a chamfer structure and a pressing surface for pressing tightly against the adjacent rigid body 9 at the end of the packer rubber sleeve 8. One of the claws is a movable claw 2 movably sleeved on the support rod 1, and the other is a fixed claw 3 fixedly sleeved on the support rod 1. The distance between the two claws can be adjusted by moving the movable claw 2. The adjusting member includes an adjusting nut 5 and an adjusting ring 4. The adjusting nut 5 is threadedly sleeved on the support rod 1, and the adjusting ring 4 is movably sleeved on the support rod 1. When the adjusting nut 5 is rotated, the adjusting nut 5 moves axially along the support rod 1 and pushes the adjusting ring 4, so that the adjusting ring 4 presses against the movable claw 2, pressing the movable claw 2 tightly against the adjacent rigid body 9 at one end of the packer rubber sleeve 8, and at the same time, the fixed claw 3 is pressed tightly against the adjacent rigid body 9 at the other end of the packer rubber sleeve 8.
[0027] The support rod 1 is of an integral structure, including a first rod section 1-1, a second rod section 1-4, and an intermediate rod section 1-2 connected between the first and second rod sections. There is an external thread section 1-3 on the intermediate rod section 1-2, and the adjusting nut 5 is threadedly assembled on the intermediate rod section 1-2. The length of the first rod section 1-1 is greater than the length of the second rod section 1-4. The movable claw 2 is movably sleeved on the first rod section 1-1. The outer diameter of the first rod section 1-1 is smaller than the outer diameter of the intermediate rod section 1-2, and a first limiting shoulder 1-5 is formed at the transition connection between the first rod section 1-1 and the intermediate rod section 1-2. The first limiting shoulder 1-5 is used to limit the moving stroke of the movable claw 2 on the support rod 1. When the movable claw 2 moves to the first limiting shoulder 1-5, it is blocked by the first limiting shoulder 1-5 and reaches the limit position, and cannot continue to approach the fixed claw 3. The position of the movable claw 2 is adjustable, and the distance between the two claws can be adjusted according to needs to be suitable for packer rubber sleeves 8 of different lengths.
[0028] The fixed jaw 3 is fixedly sleeved on the second rod section 1-4. The outer diameter of the second rod section 1-4 is smaller than that of the middle rod section 1-2, and a second limiting shoulder 1-6 is formed at the transition connection between the second rod section 1-4 and the middle rod section 1-2. The second limiting shoulder 1-6 is used to limit the installation position of the fixed jaw 3 on the support rod 1. After the fixed jaw 3 is sleeved on the second rod section 1-4, the second limiting shoulder 1-6 forms a stop against the fixed jaw 3 from the inside. The second limiting shoulder 1-6 provides a reliable stop for the fixed jaw 3, which can effectively ensure the position of the fixed jaw 3 on the support rod 1, and further ensure a strong support for the rigid body 9. Of course, in other embodiments, the limiting shoulder may not be provided as the limiting structure. For example, a plurality of limiting screws may be arranged at intervals along the same circumference on the support rod 1, and the installation position of the fixed jaw 3 on the support rod 1 is limited by the limiting screws.
[0029] On the support rod 1, stop structures are respectively provided near both ends. The stop structures are used to stop the jaws from the outside to prevent the jaws from disengaging from the support rod 1. In this way, when assembling onto the packer, there is no need to consider the problem of the jaws disengaging from the support rod 1. It is only necessary to move the jaws along the axial direction of the support rod 1, which is more convenient to operate. The stop structure is specifically a stop screw 6 threadedly installed on the support rod 1. On the support rod 1, screw holes are respectively provided near both ends. The stop screw 6 is installed in the screw hole and protrudes outward from the outer peripheral surface of the support rod 1 to prevent the jaws from disengaging. The stop structure uses the stop screw 6, which has a simple structure and is convenient to install. In other embodiments, the stop structure can also adopt other structures. For example, the stop structure is a stop pin radially inserted into the support rod 1.
[0030] Preferably, both jaws are rotatably stopped and sleeved on the support rod 1. The cross-sections of the first and second rod sections of the support rod 1 are both runway-shaped, as Figure 2As shown in the figure, the claw is provided with a mounting hole 2-1. The mounting hole 2-1 is in the shape of a runway. The two claws are respectively non-rotatably sleeved on the first and second rod segments through the runway-shaped mounting holes 2-1. In this way, when the two claws are respectively sleeved on the first and second rod segments, it can play a guiding and circumferential non-rotating role for the claws, so that the claws are sleeved on the support rod 1 at a fixed angle and remain at this angle during use, avoiding the claws from rotating and coming out of the joint between the end chamfer of the packer rubber sleeve 8 and the adjacent rigid body 9. Of course, it is also more convenient for assembly operation. In other embodiments, the mounting hole 2-1 on the claw can also be non-circular shapes such as rectangular or triangular. Correspondingly, the cross-sections of the first and second rod segments are the same as the shape of the mounting hole 2-1 of the claw, and the two claws are respectively non-rotatably sleeved on the first and second rod segments through the non-circular mounting holes 2-1; it is also possible to provide a convex key on one of the claw and the support rod 1 and a groove on the other, so that the claw and the support rod 1 are non-rotatably assembled through keyway cooperation; it is also possible that the mounting hole 2-1 on the claw is a circular hole. Correspondingly, the cross-sections of the first and second rod segments of the support rod 1 are circular. At this time, when the claw is snapped onto the packer, the claw may rotate. Therefore, the worker needs to hold the claw by hand to make it at the correct angle, so as to snap it into the joint between the end chamfer of the packer rubber sleeve 8 and the adjacent rigid body 9.
[0031] As Figure 2 shown in the figure, the clamping part 2-2 of the claw is arc-shaped, so that the clamping part 2-2 has a larger contact area with the rigid body 9 after being snapped into the joint between the end chamfer of the packer rubber sleeve 8 and the adjacent rigid body 9, and the rigid body 9 is more reliably pressed tightly. Of course, in other embodiments, the clamping part 2-2 can also be in shapes such as rectangular or conical.
[0032] During application, as Figure 3-4 shown, three pressure test devices of the present utility model can be combined for use. The three pressure test devices are connected into a whole through two steel wires 7. Each pressure test device is welded and fixed to the steel wire 7, and the three pressure test devices are distributed at intervals in the circumferential direction of the packer. As Figure 5As shown in the figure, the two jaws of each pressure test device are respectively clamped into the joints between the chamfers at both ends of the packer rubber sleeve 8 and the adjacent rigid body 9. Use a wrench to tighten the adjusting nut 5 on the support rod 1 of each pressure test device towards the end where the movable jaw 2 is located. The adjusting nut 5 pushes the adjusting ring 4, and the adjusting ring 4 presses against the movable jaw 2, tightly pressing the movable jaw 2 against the adjacent rigid body 9 at one end of the packer rubber sleeve 8. At the same time, the fixed jaw 3 is tightly pressed against the adjacent rigid body 9 at the other end of the packer rubber sleeve 8 until the adjusting nut 5 can no longer be tightened. At this time, the two jaws form a strong support for the adjacent rigid bodies 9 at both ends of the packer rubber sleeve 8 through the support rod 1, so that the two rigid bodies 9 at both ends of the packer rubber sleeve 8 cannot approach each other, restricting the upward movement of the setting piston during the ground pressure test, thereby avoiding the extrusion deformation of the packer rubber sleeve 8 and causing the packer to be set by mistake, meeting the ground pressure test requirements of the packer. The three pressure test devices are spaced apart circumferentially on the packer, and can provide a greater tightening force on the adjacent rigid bodies 9 at both ends of the packer rubber sleeve 8, and the tightening is more reliable. After the pressure test is completed, use a wrench to loosen the adjusting nut 5 on the support rod 1 of each pressure test device away from the movable jaw 2, and then take out the jaws clamped into both ends of the packer rubber sleeve 8.
[0033] When the pressure test device of the present utility model is in use, it does not need to be sleeved outside the packer. The two jaws are directly clamped into the joints between the chamfers at both ends of the packer rubber sleeve 8 and the adjacent rigid body 9 from the outside. The size of the pressure test device is not affected by the outer diameter size of the packer. Therefore, it can meet the ground pressure test requirements of packers with different outer diameters. When turning the adjusting nut 5, only a small wrench is needed to operate it, and the overall assembly and operation are more convenient.
[0034] Of course, the pressure test device of the present utility model is not limited to the implementation manners in the above embodiments.
[0035] For example, in another implementation manner, there is no adjusting member threadedly sleeved on the support rod, but there is an adjusting member with adjustable length sleeved outside the support rod. The adjusting member is formed by threadedly connecting two adjusting collar rings. By turning the adjusting collar rings, the length of the adjusting member can be adjusted. After the length of the adjusting member is adjusted in place, the two jaws can be respectively tightly pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve.
[0036] For example, in another implementation manner, a different structure of the adjusting member is provided. The adjusting member is specifically an adjusting sleeve. The inner wall surface of the adjusting sleeve is provided with an internal thread section adapted to the external thread section on the support rod. The adjusting sleeve is threadedly sleeved on the support rod. When the adjusting sleeve is turned, the adjusting sleeve can move axially along the support rod and push the movable jaw.
[0037] For example, in another embodiment, both of the two jaws are movable jaws movably sleeved on the support rod. Each jaw is provided with a set of adjusting members. The two sets of adjusting members are respectively sleeved on the support rod through reverse threads. When the two sets of adjusting members are rotated, the two sets of adjusting members can respectively press against the two jaws, so as to press the two jaws against the adjacent rigid bodies at both ends of the packer rubber sleeve. When both of the two jaws are movable jaws, the adjusting member can also be formed by screwing two adjusting collar rings. At this time, the adjusting member is sleeved outside the support rod. After the length of the adjusting member is adjusted in place, the two jaws can be respectively pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve.
[0038] The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.
Claims
1. A surface pressure test device for a hydraulic compression packer, characterized in that: It comprises a support rod and two claws which are sleeved on the support rod at intervals, the claws having a clamping portion which is used to clamp into the joint portion between the chamfered end of the packer rubber sleeve and the adjacent rigid body, at least one claw is movably sleeved on the support rod, an adjusting piece is threadedly sleeved on the support rod, and when the adjusting piece is rotated, the two claws can be directly or indirectly pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve; or an adjusting piece with adjustable length is sleeved on the outside of the support rod, and after the length of the adjusting piece is adjusted to the right position, the two claws can be pressed against the adjacent rigid bodies at both ends of the packer rubber sleeve.
2. The surface pressure testing device for hydraulic compression packer according to claim 1 is characterized in that: One of the two claws is a movable claw movably mounted on the support rod, and the other is a fixed claw fixedly mounted on the support rod. The adjusting piece is threadedly mounted on the support rod. When the adjusting piece is rotated, the adjusting piece moves axially along the support rod to tighten the movable claw against the adjacent rigid body at one end of the packer rubber sleeve, and at the same time, the fixed claw is tightened against the adjacent rigid body at the other end of the packer rubber sleeve.
3. The surface pressure testing device for hydraulic compression packer according to claim 2 is characterized in that: The adjusting member comprises an adjusting nut and an adjusting ring. The adjusting nut is threadedly sleeved on the supporting rod, and the adjusting ring is movably sleeved on the supporting rod. When the adjusting nut is rotated, the adjusting nut moves axially along the supporting rod and pushes the adjusting ring to tighten the adjusting ring onto the movable claw.
4. The surface pressure testing device for a hydraulic compression packer according to any one of claims 1 to 3, characterized in that: The two clamping claws are both mounted on the support rod in a rotation-proof manner.
5. The surface pressure testing device for hydraulic compression packer according to claim 4 is characterized in that: The support rod includes a first rod section and a second rod section. The cross sections of the first and second rod sections are both runway-shaped. Both clamping claws are provided with runway-shaped mounting holes. The two clamping claws are respectively anti-rotatably mounted on the first and second rod sections through the runway-shaped mounting holes.
6. The surface pressure testing device for a hydraulic compression packer according to any one of claims 1 to 3, characterized in that: The clamping portion is arc-shaped.
7. The surface pressure testing device for hydraulic compression packer according to claim 2 is characterized in that: The support rod is provided with a limiting structure for limiting the installation position of the fixed claw on the support rod.
8. The surface pressure testing device for hydraulic compression packer according to claim 7 is characterized in that: A limiting shoulder is provided on the outer peripheral surface of the support rod, and the limiting shoulder and the fixed claw form an axial stop to limit the installation position of the fixed claw on the support rod, and the limiting shoulder constitutes the limiting structure.
9. The surface pressure testing device for a hydraulic compression packer according to any one of claims 1 to 3, characterized in that: The support rod is provided with a stop structure near both ends, and the stop structure is used to stop and cooperate with the corresponding end claw after the corresponding end claw is sleeved on the support rod to prevent the claw from falling off the support rod.
10. The surface pressure testing device for hydraulic compression packer according to claim 9, characterized in that: The stopping structure is a stopping screw threadably mounted on the support rod.