Jamming releasing jar knocker

Abstract

The invention relates to the technical field of unfreezing and salvaging of underground fallen objects, in particular to an unfreezing jar knocker. The jam releasing jar comprises an inner core assembly and a jar assembly, an energy storage pressure spring is arranged between the inner core assembly and the jar assembly, the jar assembly is sleeved with a fishing outer sleeve, an avoiding long groove is formed in the fishing outer sleeve, the jar assembly is provided with a jar piece, an elastic spring bolt is arranged on the jar assembly, the inner core assembly comprises a lock cylinder, and the lock cylinder is provided with an avoiding concave part and a pushing convex part; when a falling object is clamped and a steel wire is lifted up, the inner core assembly moves upwards, the lock cylinder pushes the elastic spring bolt outwards to enable the elastic spring bolt to be blocked with the avoiding long groove, the fishing outer sleeve and the jarring assembly are kept relatively fixed in the axial direction, the inner core assembly continues to move upwards till the lock cylinder is axially separated from the elastic spring bolt, the elastic spring bolt rebounds, and blocking of the fishing outer barrel to the jarring assembly is relieved. Under the retraction elastic force of the steel wire and the release elastic force of the energy storage pressure spring, the jarring assembly rapidly moves upwards relative to the fishing outer sleeve and impacts the fishing outer sleeve through the jarring piece, and large impact force can be generated.

Description

Technical Field

[0001] This invention relates to the field of downhole object release and retrieval technology, and in particular to a release shock device. Background Technology

[0002] In oilfield development and production testing, instrument jamming is a frequent occurrence. When this happens, retrieval operations are necessary to remove the jammed object. Currently, the most commonly used tools for retrieving jammed objects are a vibrator and a retrieval cylinder. These two are used together; the retrieval cylinder is connected to the bottom of the vibrator. After the retrieval cylinder catches the jammed object, the vibrator generates a shock, transmitting the shock force to the object and loosening the jammed area, thus allowing the object to be retrieved. Currently, the most commonly used shock absorbers are wire rope shock absorbers, such as the claw-type wire rope shock absorber disclosed in Chinese utility model patent with authorization announcement number CN207315279U. It includes a retrieval jacket composed of an upper body, an intermediate joint, an intermediate short section, and a lower short section connected in sequence. Inside the retrieval jacket, a shock hammer and a spindle fixedly connected to the shock hammer are movably installed. A spring is fitted on the outside of the spindle. The upper end of the spring is limited by the intermediate joint, and the lower end contacts and limits the upper end of the claw sleeve. The claws on the claw sleeve are engaged with the spindle. When performing wire work, the upper part of the vibratory hammer is connected to the wire. The wire is lifted, and as the tension of the wire increases, the vibratory hammer and the mandrel move upward, driving the chuck sleeve to move upward as well. The spring is compressed, and the tension of the wire continues to increase. When the chuck on the chuck sleeve reaches the stepped groove of the middle short section, the chuck disengages from the mandrel, and the constraint force on the mandrel disappears. At this time, under the action of the wire's retraction force, the vibratory hammer moves upward rapidly and collides with the upper body. The impact force is transmitted to the point where the object is stuck, thus achieving the vibration release.

[0003] The existing wireline shovel impactors rely mainly on the recoil force of the wireline after elastic deformation to impact stuck objects. This results in weak impact force. If the stuck object becomes severely stuck, the well must be shut down and controlled. A large-diameter wireline retrieval vehicle must be lowered into the well to retrieve the stuck object, which seriously affects the production efficiency of oil, gas and water wells. Summary of the Invention

[0004] The purpose of this invention is to provide a release shock absorber to solve the problem of insufficient shock force in existing wire mesh shock absorbers.

[0005] To achieve the above objectives, the present invention provides a card-unlocking shock absorber using the following technical solution: The release shock device includes an inner core assembly for connecting a steel wire, an outer shock assembly with an energy storage spring between them, and an outer retrieval cover for retrieving the fallen object. The retrieval cover has an axially extending clearance groove. The shock assembly has a shock element that radially extends into the clearance groove and a radially retractable elastic latch corresponding to the clearance groove. The inner core assembly includes a lock cylinder movably inserted into the shock assembly and cooperating with the elastic latch. The lock cylinder has a clearance recess that, in its natural state, avoids the elastic latch, keeping it in a radially inwardly retracted state. The inner core assembly moves upward, and the lock cylinder pushes the elastic latch outward radially as it moves upward, causing it to extend into the clearance groove. When the falling object encounters a jam and the steel wire is lifted, the inner core assembly moves upward, and the lock cylinder pushes the elastic latch outward, causing the elastic latch to stop with the clearance groove. The retrieval outer sleeve and the shock assembly remain axially relatively fixed. The inner core assembly continues to move upward until the lock cylinder axially disengages from the elastic latch. The elastic latch rebounds and releases the retrieval outer sleeve from the shock assembly. Under the elastic force of the steel wire's retraction and the elastic force of the energy storage spring's release, the shock assembly moves rapidly upward relative to the retrieval outer sleeve and impacts the retrieval outer sleeve through the shock component.

[0006] Furthermore, the inner core assembly also includes a pull rod, which is movably mounted inside the shock assembly and fixedly connected to the lock cylinder. The upper end of the pull rod extends upward outside the shock assembly to connect the steel wire, and the energy storage spring is fitted onto the pull rod.

[0007] Furthermore, a storage spring spacer is mounted on the pull rod and is designed to prevent detachment downwards. The storage spring spacer is located below the storage spring. When the pull rod moves upwards, it causes the storage spring spacer to move upwards, thereby compressing the storage spring to store energy.

[0008] Furthermore, the energy storage spring spacer engages with the shock assembly guide to guide the movement of the pull rod within the shock assembly.

[0009] Furthermore, a return spring is provided between the inner core assembly and the shock assembly to cause the energy storage spring and the inner core assembly to reset after the energy storage spring releases its elastic force.

[0010] Furthermore, a return spring spacer is movably fitted on the inner core assembly. The return spring and the energy storage spring are located on opposite sides of the axial direction of the return spring spacer. When the inner core assembly moves upward, the energy storage spring pushes against the return spring spacer, causing the return spring to compress.

[0011] Furthermore, the shock assembly includes a shock rod and a spring jacket fixedly connected to the shock rod. The shock element is disposed on the shock rod. The energy storage spring and the return spring are both located inside the spring jacket. A spring cover is provided at the upper end of the spring jacket, and the spring cover stops on the upper side of the return spring.

[0012] Furthermore, the spring cap is threaded onto the upper end of the spring sleeve.

[0013] Furthermore, a shock pin is radially inserted into the shock rod near its bottom position, and the shock pin constitutes the shock element.

[0014] Furthermore, the lower end of the lock cylinder is a cone.

[0015] Beneficial Effects: This invention, the card-unlocking shock absorber, is a pioneering invention. The inner core assembly is used to connect the steel wire. An shock absorber is fitted over the inner core assembly, with an energy-storing spring between them. A retrieval jacket is fitted over the shock absorber, which has an axially extending clearance groove. The shock absorber has a shock element that radially extends into the clearance groove. The shock absorber also has a radially retractable elastic latch, which corresponds to the clearance groove. The inner core assembly includes a lock cylinder movably inserted into the shock absorber. The lock cylinder has a clearance recess that, in its natural state, avoids the elastic latch and keeps it in a radially inward retracted state, and a pushing protrusion that, when moving upward, radially pushes the elastic latch outward, causing it to extend into the clearance groove. When the object encounters a snag and the lifting wire is pulled upwards, the inner core assembly moves upwards. The pushing protrusion of the lock cylinder radially pushes the elastic locking tongue outwards, causing the elastic locking tongue to extend into the clearance groove on the retrieval outer sleeve. The clearance groove forms a stop, keeping the retrieval outer sleeve and the shock assembly axially relatively fixed. During this process, the energy storage spring is compressed and stores energy. The inner core assembly continues to move upwards until the lock cylinder axially disengages from the elastic locking tongue. The elastic locking tongue rebounds and releases the obstruction of the shock assembly by the retrieval outer sleeve. Under the elastic force of the wire's retraction and the elastic force of the energy storage spring's release, the shock assembly moves rapidly upwards relative to the retrieval outer sleeve and impacts the retrieval outer sleeve through the shocking component, generating a large impact force, thereby loosening the snag of the object and releasing it. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the card-unlocking shock absorber of the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of a medium-elastic locking tongue mounted on a shock bar; In the diagram: 1. Upper connector; 2. Spring cover; 3. Pull rod; 4. Return spring; 5. Return spring spacer; 6. Spring outer sleeve; 7. Energy storage spring; 8. Energy storage spring spacer; 9. Vibration rod; 10. Elastic bolt; 10-1. Through hole; 10-2. Tongue-shaped boss; 10-3. Oval elongated hole; 11. Bolt return spring; 12. Elastic bolt positioning pin; 13. Lock cylinder; 13-1. Avoidance recess; 13-2. Pushing protrusion; 14. Vibration pin; 15. Vibration pin shaft; 16. Retrieval outer sleeve. Detailed Implementation

[0017] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0018] This invention, a wire-operated unblocking shock absorber, addresses the problem of insufficient impact force in existing wire-operated shock absorbers. The basic principle of this unblocking shock absorber is as follows: The unblocking shock absorber includes an inner core assembly for connecting the wire. An impact assembly is fitted over the inner core assembly, with an energy-storing spring between them. A retrieval sleeve is fitted over the impact assembly to retrieve the obstructed object. When the obstructed object encounters a blockage and the wire is lifted, the inner core assembly moves upward. Initially, the retrieval sleeve axially blocks the impact assembly, preventing it from moving upward. During this process, the energy-storing spring compresses and stores energy. After the inner core assembly moves upward a certain distance, the obstruction of the retrieval sleeve is released. At this point, under the recoil elasticity of the wire and the release elasticity of the energy-storing spring, the impact assembly can quickly move upward relative to the retrieval sleeve and rapidly impact the retrieval sleeve. The impact force is transmitted to the obstructed object, loosening the obstructed area and thus unblocking it. It relies on the retraction elastic force of the steel wire and the release elastic force of the energy storage spring to shock the stuck object, which significantly increases the shock force and makes the shock release effect better.

[0019] Embodiments of the card-unlocking shock device of the present invention: like Figure 1 As shown, the release shock absorber includes an inner core assembly, a shock assembly, and a retrieval jacket 16. The upper end of the inner core assembly is used to connect a steel wire. The shock assembly is sleeved on the outside of the inner core assembly, and an energy storage spring 7 is installed between the shock assembly and the inner core assembly. The retrieval jacket 16 is sleeved on the outside of the shock assembly and is used to retrieve fallen objects. The retrieval structure can be directly installed on the retrieval jacket 16, or a retrieval cylinder can be connected to the retrieval jacket 16 to retrieve the fallen object.

[0020] The inner core assembly includes a pull rod 3 and a lock cylinder 13 fixedly connected to the pull rod 3. The lower end of the pull rod 3 has an axially extending mounting groove with an internal thread. The upper end of the lock cylinder 13 is threaded into this mounting groove. The upper end of the pull rod 3 extends upwards outwards from the shock assembly and is connected to an upper connector 1 for connecting a steel wire. The shock assembly includes a shock rod 9 and a spring sleeve 6 fixedly connected to the shock rod 9. The lower end of the spring sleeve 6 is threaded to the upper end of the shock rod 9. The shock rod 9 is movably installed inside the salvage outer cylinder. The shock rod 9 has a central hole of a certain length at its axis, and a radial through hole at the bottom of the central hole. The radial through hole serves as a gas passage connecting the central hole to the outside. The lock cylinder 13 is movably inserted into the central hole. The shock rod 9 has an elastic locking tongue 10 that extends and retracts radially along the shock rod 9. Figure 2As shown, the elastic latch 10 has a radially penetrating through hole 10-1 in the middle, through which the lock cylinder 13 can pass. One end of the elastic latch 10 has a tongue-shaped boss 10-2. An elliptical elongated hole 10-3 extending axially along the elastic latch 10 is provided between the tongue-shaped boss 10-2 and the through hole 10-1 on the elastic latch 10. The elliptical elongated hole 10-3 is set at 90° with the through hole 10-1. The vibrating rod 9 has an elastic latch positioning pin 12, which passes through the elliptical elongated hole 10-3 of the elastic latch 10 to limit the radial extension range of the elastic latch 10 and prevent the elastic latch 10 from dislodging from the vibrating rod 9. The other end of the elastic latch 10 has an axial blind hole. A latch return spring 11 is installed in the axial blind hole. One end of the latch return spring 11 is connected to the vibrating rod 9, and the other end is connected to the elastic latch 10, providing the elastic latch 10 with an elastic force radially inward along the vibrating rod 9. The lock cylinder 13 has a reduced diameter section in the middle, and a relief recess 13-1 is formed on the lock cylinder 13 to avoid the elastic bolt 10. The front and rear sides of the relief recess 13-1 are both inclined surfaces. The outer peripheral surface of the lock cylinder 13 located below the reduced diameter section constitutes the pushing protrusion 13-2 for pushing the elastic bolt 10. The salvage jacket 16 is provided with an axially extending clearance groove, and the elastic locking tongue 10 is provided corresponding to the clearance groove. In the natural state, the clearance recess 13-1 of the lock cylinder 13 clearances the elastic locking tongue 10, so that the elastic locking tongue 10 is kept in a radially inward retracted state. When the lock cylinder 13 moves upward, the rear side of the clearance recess 13-1 first pushes the elastic locking tongue 10 out of the clearance recess 13-1, and then the pushing protrusion 13-2 of the lock cylinder 13 radially pushes the elastic locking tongue 10 outward, so that the elastic locking tongue 10 extends into the clearance groove. The elastic locking tongue 10 and the upper groove wall of the clearance groove form a stop in the axial direction, so that the salvage jacket 16 and the shock rod 9 are axially fixed. The lower end of the shock rod 9 is provided with a radially penetrating through hole. A shock pin 14 is installed in the through hole through the shock pin shaft 15. The shock pin 14 extends radially into the clearance groove on the salvage jacket 16. During the upward movement of the shock rod 9, the part of the shock pin 14 that extends out of the shock rod 9 can impact the upper wall of the clearance groove. The impact force is transmitted to the location where the object is stuck, and the stuck part is loosened by shock.

[0021] The pull rod 3 is guided and movably installed within the shock assembly. The energy storage spring 7 is fitted onto the pull rod 3. An energy storage spring spacer 8 is movably and downwardly anti-detached mounted on the pull rod 3. The lower end of the pull rod 3 has an outwardly flanged edge. The energy storage spring spacer 8 and the outwardly flanged edge form a stop fit, thus preventing the energy storage spring spacer 8 from detaching from the pull rod 3. The energy storage spring spacer 8 is located below the energy storage spring 7. When the pull rod 3 moves upward, it drives the energy storage spring spacer 8 upward, thereby compressing the energy storage spring 7 to store energy. The energy storage spring spacer 8 cooperates with the shock assembly guide to guide the pull rod 3, causing the pull rod 3 to move linearly and preventing the pull rod 3 from deviating. This ensures that the energy storage spring 7 is evenly compressed.

[0022] A spring cover 2 is threadedly connected to the upper end of the spring sleeve 6. The spring cover 2 has an axial through hole in its center, and the pull rod 3 is movably inserted into the axial through hole. A return spring 4 is also provided between the inner core assembly and the shock assembly. The return spring 4 is fitted outside the pull rod 3, and a return spring spacer 5 is movably fitted on the pull rod 3. The spring cover 2 and the return spring spacer 5 stop the return spring 4 from the upper and lower sides, respectively. At the same time, the return spring spacer 5 stops the energy storage spring 7 from the upper side. In the natural state, there is a certain distance between the return spring spacer 5 and the spring cover 2. When the pull rod 3 moves upward, the energy storage spring 7 first pushes the return spring spacer 5 upward, causing the return spring 4 to compress until the return spring spacer 5 presses against the spring cover 2, and the return spring 4 can no longer be compressed. After that, as the pull rod 3 continues to move upward, the energy storage spring 7 begins to compress. The spring cap 2 is threaded onto the upper end of the spring sleeve 6. The initial tension of the return spring 4 and the energy storage spring 7 can be adjusted by adjusting the length of the spring cap 2 extending into the spring sleeve 6. The function of the return spring 4 is to cause the energy storage spring 7 and the inner core assembly to reset after the energy storage spring 7 releases its elastic force. The lower end of the lock cylinder 13 is a cone, which facilitates the lock cylinder 13 pushing the elastic latch 10 outwards when the inner core assembly resets, thus allowing it to pass smoothly through the elastic latch 10 and reset. Of course, in other embodiments, the lower end of the lock cylinder 13 can also be a ball head.

[0023] When retrieving a test object, connect the retrieval cylinder to the bottom of the retrieval jacket 16, connect the ground steel wire to the upper connector 1 of the unblocking shock absorber, and lower the steel wire to send the retrieval cylinder to the location where the test object is stuck. After the retrieval cylinder catches the stuck object, use a ground winch to pull up the steel wire. The inner core assembly moves upward, and the elastic locking tongue 10 is squeezed out of the avoidance recess 13-1 on the lock cylinder 13. The pushing protrusion 13-2 of the lock cylinder 13 pushes the elastic locking tongue 10 outward, causing the elastic locking tongue 10 to stop with the avoidance groove, thus keeping the retrieval jacket 16 and the shock absorber axially relatively fixed. At the same time, the energy storage spring 7 pushes the return spring spacer 5 upward, thereby compressing the return spring 4, until the return spring spacer 5 presses against the spring cover 2, and the return spring 4 is no longer compressed. The energy storage spring 7 begins to compress and store energy; the inner core assembly continues to move upward until the lock cylinder 13 axially disengages from the elastic latch 10. Under the tension of the latch return spring 11, the elastic latch 10 automatically rebounds and releases the outer cylinder's obstruction of the shock assembly, releasing the shock assembly. The tension potential energy stored in the energy storage spring 7 is released instantaneously. Under the elastic force of the wire's retraction and the elastic force of the energy storage spring 7, the upward speed of the shock assembly is greatly increased, causing the shock assembly to move rapidly upward relative to the retrieval jacket 16. The shock pin 14 at the bottom of the shock rod 9 instantly impacts the upper groove wall of the avoidance slot of the retrieval jacket 16, thereby greatly increasing the shock force. Since the elastic latch 10 is controlled by the stroke of the lock cylinder 13, the reliability of the shock release function is effectively ensured. If a single shock fails to disengage, the pull rod 3, the return spring spacer 5, and the energy storage spring spacer 8 automatically return to their original positions under the initial tension of the return spring 4 and the energy storage spring 7. The steel wire is lowered, and the inner core assembly, shock assembly, return spring 4, return spring spacer 5, energy storage spring 7, energy storage spring spacer 8, and elastic locking tongue 10 all descend together. Because the elastic locking tongue 10 is located within the reduced-diameter section in the middle of the lock core 13, it can retract smoothly, allowing the shock rod 9 and other components to continue descending smoothly back to the starting point. The steel wire is then raised, achieving multiple rounds of cyclic shock release operations until the stuck object is successfully released. This significantly improves the success rate of retrieving stuck objects from oil, gas, and water wells, reduces the number of well shutdowns, well control operations, and the need to deploy large-diameter steel wire retrieval vehicles to retrieve stuck objects, and improves the production efficiency of oil, gas, and water wells.

[0024] In one embodiment of the above-described embodiments, the inner core assembly includes a pull rod, which is fixedly connected to the lock cylinder. The upper end of the pull rod extends upward beyond the shock assembly for connecting a steel wire. An energy storage spring and a return spring are both mounted on the pull rod. In other embodiments, the energy storage spring may not be mounted on the pull rod but may be entirely outside the pull rod. In this case, there may be two or more energy storage springs, evenly distributed around the pull rod. In other embodiments, a separate pull rod may not be provided; instead, the length of the lock cylinder may be extended so that the upper end of the lock cylinder extends upward beyond the shock assembly for connecting a steel wire. The energy storage spring and return spring are both mounted on the lock cylinder.

[0025] In one embodiment of the above-described example, a storage spring spacer is mounted on the pull rod and is designed to prevent detachment downwards. The storage spring is compressed by the spacer pushing against it. In other embodiments, the storage spring spacer may not be used separately. Instead, the lower end of the storage spring is blocked by the outward-flared edge at the lower end of the pull rod. When the pull rod moves upwards, the outward-flared edge pushes against the storage spring, thus compressing it.

[0026] In one embodiment of the above-described embodiments, a spring cover is threaded onto the upper end of the spring jacket, and the spring cover abuts against the upper side of the return spring. In other embodiments, the spring cover may also be fixed by other methods, such as bolt connection, welding, etc.; alternatively, the spring cover may not be provided, and an inward flange may be provided at the upper end of the spring jacket, which abuts against the upper side of the return spring.

[0027] In one embodiment of the above-described embodiments, a shock pin is radially inserted into the shock rod near its bottom position. The shock pin extends radially into a clearance groove, and constitutes the shock component of the shock assembly. The radial insertion of the shock pin into the shock rod serves two purposes: firstly, it can withstand greater shear stress, is less prone to deformation, and improves impact reliability; secondly, it facilitates installation. Alternatively, the shock component can employ other structures, such as fixing multiple shock blocks to the outside of the shock rod. These shock blocks are evenly distributed on the same circumference, and when the shock rod moves upward, the shock blocks synchronously impact and retrieve the outer casing. In this case, the multiple shock blocks together constitute the shock component.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A card-unlocking shock device, characterized in that: The device includes an inner core assembly for connecting steel wires, an outer casing for a shock assembly with a storage spring between them, an outer casing for retrieving fallen objects from the shock assembly, an axially extending clearance groove on the clearance groove, a shock component radially extending into the clearance groove, and a radially retractable elastic latch corresponding to the clearance groove. The inner core assembly includes a lock cylinder movably inserted into the shock assembly and engaging with the elastic latch. The lock cylinder has a clearance recess that, in its natural state, avoids the elastic latch, keeping it in a radially inwardly retracted state. As it moves upward, the elastic locking tongue is pushed outward radially to insert into the push protrusion in the clearance groove. When the falling object encounters a jam and the steel wire is lifted, the inner core assembly moves upward, and the lock cylinder pushes the elastic locking tongue outward to stop the elastic locking tongue from the clearance groove. The retrieval outer sleeve and the shock assembly remain relatively fixed axially. The inner core assembly continues to move upward until the lock cylinder axially disengages from the elastic locking tongue. The elastic locking tongue rebounds and releases the retrieval outer cylinder from the shock assembly. Under the elastic force of the steel wire's retraction and the elastic force of the energy storage spring's release, the shock assembly moves rapidly upward relative to the retrieval outer sleeve and impacts the retrieval outer sleeve through the shock component.

2. The card-unlocking shock absorber according to claim 1, characterized in that: The inner core assembly also includes a pull rod, which is movably installed inside the shock assembly and fixedly connected to the lock cylinder. The upper end of the pull rod extends upward outside the shock assembly to connect the steel wire, and the energy storage spring is fitted onto the pull rod.

3. The card-unlocking shock absorber according to claim 2, characterized in that: The pull rod is equipped with a movable and downward-facing anti-detachment device for an energy storage spring spacer. The energy storage spring spacer is located below the energy storage spring. When the pull rod moves upward, it causes the energy storage spring spacer to move upward, thereby compressing the energy storage spring to store energy.

4. The card-unlocking shock absorber according to claim 3, characterized in that: The energy storage spring spacer engages with the shock assembly guide to guide the movement of the pull rod within the shock assembly.

5. The card release shock absorber according to any one of claims 1-4, characterized in that: A return spring is also provided between the inner core assembly and the shock assembly to cause the energy storage spring and the inner core assembly to reset after the energy storage spring releases its elastic force.

6. The card-unlocking shock absorber according to claim 5, characterized in that: The inner core assembly is fitted with a return spring spacer. The return spring and the energy storage spring are located on opposite sides of the axial direction of the return spring spacer. When the inner core assembly moves upward, the energy storage spring pushes against the return spring spacer, causing the return spring to compress.

7. The card-unlocking shock absorber according to claim 5, characterized in that: The shock assembly includes a shock rod and a spring jacket fixedly connected to the shock rod. The shock element is disposed on the shock rod. The energy storage spring and the return spring are both located inside the spring jacket. A spring cover is provided at the upper end of the spring jacket, and the spring cover stops on the upper side of the return spring.

8. The card-unlocking shock absorber according to claim 7, characterized in that: The spring cap is threaded onto the upper end of the spring sleeve.

9. The card-unlocking shock absorber according to claim 7, characterized in that: A shock pin is radially inserted into the shock rod near the bottom position, and the shock pin constitutes the shock element.

10. The card release shock device according to any one of claims 1-4, characterized in that: The lower end of the lock cylinder is a cone.

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