Intelligent pipe-stuck releaser for logging probe

Abstract

This invention discloses an intelligent unsticking device for logging pipes, belonging to the technical field of pipe retrieval tools for geological exploration logging operations and oil and gas well logging operations. Its features include a connector, pipe body, annular tension / compression sensor, hammer rod and hammer head, impact electromagnet, electronic control unit, and battery pack. It generates high-frequency axial mechanical impact force through electromagnetic drive, which is transmitted to the stuck point for efficient unsticking. Furthermore, it employs intelligent sensing and dynamic feedback technology based on real-time downhole conditions to adjust the impact frequency and intensity in real time, achieving intelligent, efficient, and safe handling of logging pipe stuck incidents. This device has the advantages of intelligent identification, precise impact, modular integration, and high efficiency and economy, and can be widely used for rapid unsticking of logging pipe instruments in oil and gas well logging operations and geological exploration well logging operations.

Description

Technical Field

[0001] The invention relates to the field of oil, gas and geological exploration well logging operations. Specifically, it relates to an intelligent unblocking device for handling well logging pipe jamming accidents during well logging operations. In particular, it is an intelligent well logging pipe unblocking device that achieves intelligent identification, precise shock, modular integration, high efficiency and economy through structural innovation, thereby improving reliability, compactness and safety redundancy. Background Technology

[0002] As oil and gas drilling and geological exploration extend to deeper areas, the risk of stuck logging pipes has increased significantly. Wellbore collapse, wellbore narrowing, abnormal mud properties, and complex formations can all lead to stuck logging pipes. Currently, mechanical unblocking tools (such as cable shockers) rely on manual judgment and operation, resulting in delayed response and unpredictable shock force, which can easily cause secondary damage to the instruments. Core-penetration retrieval processes require cutting the cable, not only causing economic losses due to cable scrapping but also significantly extending the operation cycle and increasing wellbore safety risks. These methods generally suffer from low levels of automation, excessive reliance on manual experience, uncontrollable unblocking impact force, long operation cycles, and the risk of secondary damage to expensive logging instruments and cables. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an intelligent unblocking device for well logging pipes. This unblocking device effectively integrates an electronic control unit, a sensor detection and monitoring unit, a lithium battery power unit, and an impact electromagnet actuator unit, reducing the number of parts and internal physical connections. This significantly improves the overall reliability, structural compactness, and environmental adaptability of the equipment. Furthermore, it innovatively integrates an emergency mechanical unblocking function that does not rely on the main circuit, forming a dual safety guarantee.

[0004] To achieve the above objectives, the invention adopts the following technical solution:

[0005] A smart unblocking device for logging pipes includes a connector, a pipe body, an annular tension / compression sensor, a hammer rod and hammer head, an impact electromagnet, an electronic control unit, and a battery pack.

[0006] Modular and Functionally Zoned Pipeline: The pipeline adopts a clearly defined functional zoning design, including an upper pipe, a middle pipe, and a lower pipe that are sequentially and sealed by threads. The connector is located inside the upper pipe; the impact electromagnet is located inside the middle pipe; and the electronic control unit and battery pack are located inside the lower pipe. This modular design not only facilitates assembly, testing, and maintenance, but also isolates the impact generation area, core control area, and energy area, reducing mutual interference.

[0007] Multifunctional composite pipe wall structure: The pipe wall is a three-layer composite functional structure, comprising, from the outside to the inside:

[0008] Pressure-bearing sealing outer layer: Made of high-performance alloy, it serves as the main load-bearing structure, transmitting high-frequency impact force, resisting downhole high pressure, and achieving overall sealing.

[0009] Electromagnetic shielding and thermal conductive intermediate layer: composed of copper alloy mesh and high thermal conductivity silicone. This layer effectively shields the strong electromagnetic interference generated when the impact electromagnet is working, protecting the stable operation of the electronic control unit. On the other hand, it serves as a thermal management channel to evenly conduct the heat generated by the electronic control unit and electromagnet to the outer shell.

[0010] The inner layer for sensor signal transmission and power distribution is made of insulating engineering plastic (such as PEEK), with embedded micro-channels and conductive foil, forming a built-in "circuit board". This layer completely replaces the traditional loose wire harness, providing a reliable power delivery and signal transmission channel for components such as ring tension / compression sensors and electronic control units, avoiding the risks of cable wear and loosening.

[0011] Integrated sensing and force transmission connector: The connector is a composite structure that integrates multiple functions.

[0012] Its interior is machined with stepped through holes. The diameter of the lower cavity of the through hole is slightly larger than the diameter of the hammer head, and the inner wall is coated with a wear-resistant and friction-reducing coating (such as a diamond-like coating). This is specially designed to form an impact guide and buffer cavity for the hammer head, which can accurately guide the impact direction and reduce impact wear.

[0013] The lower end face is machined with an annular boss. The annular tension / compression sensor adopts an advanced thin-film strain gauge and annular elastomer integral molding process, directly embedded and fixed to the inner surface of the annular boss. This makes the connector itself not only a mechanical interface for connecting to the upper instrument, but also a path for transmitting impact force, and a sensitive substrate for sensing tension and compression, realizing a deep integration of mechanical structure and sensing element.

[0014] Integrated structural and functional battery pack: The battery pack features a revolutionary integrated structural and functional design.

[0015] Its battery cells are arranged in a ring array, with an axial through hole naturally formed in the center.

[0016] A retractable emergency mechanical shock rod is cleverly installed within this axial through-hole. The upper end of the shock rod passes sequentially through the central hole of the battery pack and the pre-reserved central channel of the electronic control unit, ultimately forming a mechanical coupling with the hammer rod and hammer head. The shock rod is locked in the ready-to-fire position by a small electromagnetic locking pin controlled by the electronic control unit.

[0017] This design makes the battery pack not only a power module that supplies power to the entire system, but also a housing, guide mechanism and mounting base for the emergency mechanical release mechanism, providing an independent and highly reliable mechanical shock in the event of a failure of the main electronic system.

[0018] Furthermore, the impact electromagnet operates in an intermittent pulse mode, with a preferred hammering force of 8 kg, an adjustable vibration frequency of 1-10 times / minute, and a stroke of 20-30 mm. The coil frame and heat dissipation fins of the impact electromagnet are integrated into a single unit, with the heat dissipation fins extending and tightly pressed against the electromagnetic shielding and thermally conductive intermediate layer of the tube, greatly optimizing the heat dissipation path.

[0019] Furthermore, the electronic control unit achieves a high degree of integration. The sensing chips for its attitude sensors (such as MEMS gyroscopes / accelerometers) and vibration sensors are directly mounted on a circuit board on the inner wall of its metal casing. This metal casing serves multiple functions: as a mounting housing for the sensors; as a heat sink and a thermally conductive interlayer for heat dissipation between the heat sink and the tube body; and the elastic contacts on the casing directly connect to the inner layer of the tube body for sensor signal transmission and power distribution, achieving "wireless" plug-in connections and significantly improving connection reliability.

[0020] Furthermore, a precise waterproof pin-socket structure is provided at the connecting end faces of the upper, middle, and lower tubes. When the three tube sections are tightened by threads, the pins and sockets automatically align, reliably achieving continuous connection of sensor signal transmission and power distribution internal circuitry between the tube sections.

[0021] Furthermore, it also includes a detachable bottom cover attached to the bottom of the downhole tube. The inner side of the bottom cover integrates a wireless charging receiver coil and a temperature sensor, enabling it to perform its basic sealing function while adding the ability for contactless charging and real-time monitoring of the downhole ambient temperature.

[0022] Furthermore, a sealing gasket is provided at the connection between the connector and the upper tube; a battery pack shock-absorbing sleeve is fitted on the outside of the battery pack to buffer vibration; and the electronic control unit is fixed inside the lower tube by a bracket.

[0023] Working principle

[0024] During normal logging operations, this device is deployed downhole as an intelligent monitoring unit along with the instrument cluster. The annular tension / compression sensor monitors changes in axial tension / compression in real time, and the electronic control unit comprehensively analyzes data from its integrated attitude, vibration, and tension / compression sensors to intelligently determine the instrument's operating status.

[0025] When the intelligent algorithm determines that a jam is encountered, the electronic control unit immediately activates the main unlocking mode: it controls the impact electromagnet to work in a preset intermittent pulse mode, driving the hammer rod and hammer head to periodically strike the guide cavity at the bottom of the connector at high speed. The resulting upward impact vibration is transmitted through the connector to the entire instrument string, attempting to release the jam.

[0026] If the main unlocking mode fails completely due to electronic system malfunction, or if multiple attempts fail, the emergency unlocking mode is activated. In this case, a pulling force exceeding a set value can be applied via a ground winch (mechanical trigger), or a command can be issued before the electronic control unit completely fails (electric trigger) to release the electromagnetic locking pin of the retractable emergency mechanical shock rod. The pre-tensioned spring instantly drives the shock rod upward at high speed, violently impacting the hammer rod and generating a powerful mechanical shock as the final unlocking guarantee.

[0027] Through the integration of the above-mentioned innovative structures, the invention brings significant beneficial effects:

[0028] Intelligent identification. Employing deep learning and multi-sensor fusion technology, it accurately identifies the type and location of stuck downhole tools, and improves the efficiency of unblocking decisions through adaptive threshold optimization and real-time data feedback.

[0029] Precise impact. Utilizing intelligent sensing and dynamic feedback technology, the impact frequency and intensity are adjusted in real time to ensure that the impact energy is accurately delivered to the target point during the card unlocking operation.

[0030] Modular integration. A modular integrated design is adopted, with sensors, power units, and control systems independently packaged to enable rapid assembly and disassembly and functional expansion; standardized interfaces enhance adaptability.

[0031] Highly efficient and economical. The average cost of a single operation of the traditional card unlocking process (including cable loss, labor and equipment loss) is about 50,000 yuan. The intelligent card unlocker can avoid cable scrapping and the time for a single card unlocking is reduced from several days in the traditional process to 10-30 minutes.

[0032] High reliability: Reduces internal cabling and connectors by more than 80%, eliminating major points of failure; multi-layered tube wall structure provides excellent electromagnetic compatibility and thermal management capabilities.

[0033] Dual safety guarantee: The innovative emergency mechanical shock mechanism provides a final unlocking method independent of the electronic system, with a high degree of safety redundancy.

[0034] Easy maintenance: The modular segmented design and cableless internal connection make on-site maintenance, battery replacement or component upgrades quick and easy. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the invention structure;

[0036] Figure 2 A schematic diagram of the cross-sectional structure of the joint;

[0037] Figure 3 A schematic diagram of the tube structure for the invention;

[0038] Figure 4 A schematic diagram of the battery pack structure for the invention;

[0039] In the diagram: 1: Connector; 101: Stepped through hole; 102: Annular boss; 2: Pipe body; 201: Upper pipe; 202: Middle pipe; 203: Lower pipe; 204: Pressure-bearing sealing outer layer; 205: Electromagnetic shielding and heat conduction intermediate layer; 206: Sensor signal transmission and power distribution inner layer; 3: Annular tensile and compressive sensor; 4: Hammer rod and hammer head; 5: Impact electromagnet; 6: Electronic control unit; 7: Telescopic emergency mechanical shock rod; 8: Heat dissipation fins; 9: Battery pack; 901: Axial through hole; 10: Bottom cover; 11: Battery pack shock absorber sleeve; 12: Support; 13: Logging instrument. Detailed Implementation

[0040] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0041] like Figures 1 to 4 As shown, this embodiment provides a smart unblocking device for logging pipes with an outer diameter of 54mm and a total length of approximately 700mm.

[0042] 1. Pipe body 2 and its connecting structure

[0043] Pipe body 2 adopts a clearly defined three-section functional zoning design:

[0044] Upper pipe 201: Internally accommodates connector 1 and related force transmission and sensing components.

[0045] Zhongguan 202: As a "power compartment", it has an internally fixedly installed impulse electromagnet 5.

[0046] Lower tube 203: Serves as the "control and energy compartment", housing the electronic control unit 6 and battery pack 9.

[0047] All three pipe sections are made of 06Cr17Ni12Mo2 stainless steel as the base material. They are connected sequentially to the upper pipe and the middle pipe, and then to the lower pipe, via API standard trapezoidal threads. Each connection end is equipped with a fluororubber O-ring to ensure an overall static pressure sealing capacity of not less than 80MPa. For ease of assembly and maintenance, the bottom end of the lower pipe 203 is connected to a removable bottom cover 10 via threads. The bottom cover end face is also equipped with a sealing ring.

[0048] The tube wall of tube body 2 is a three-layer functional structure formed by advanced co-sintering process:

[0049] Pressure-bearing sealing outer layer 204: that is, the stainless steel pipe body itself, which serves as the main load-bearing structure.

[0050] Electromagnetic shielding and thermal conductivity intermediate layer 205: A copper mesh skeleton is sintered on the inner wall of the base tube and filled with a highly thermally conductive and highly insulating organosilicon gel. This layer forms a continuous electromagnetic shielding cavity and heat conduction path throughout the entire tube.

[0051] Inner layer 206 for sensor signal transmission and power distribution: In the innermost layer, micro-grooves are etched into the inner surface of the insulating PEEK material through precision machining, and laminated copper foil is embedded to form a circuit. This layer forms a complete power distribution and communication network throughout the entire inner wall of the tube.

[0052] At each threaded connection end face of the upper tube 201, middle tube 202, and lower tube 203, a matching waterproof pin-socket is pre-embedded and encapsulated (not shown separately in the structural diagram). When the tube sections are tightened, not only is a mechanical connection and seal achieved, but also the reliable connection between the power lines and signal lines of the inner layer 206 for sensor signal transmission and power distribution between each section is automatically completed, realizing the continuity of the circuit throughout the entire tube.

[0053] 2. Integration of connector 1 with annular tension / compression sensor 3

[0054] Connector 1 is made of high-strength precipitation-hardening stainless steel 17-4PH and is the core multi-functional composite structure.

[0055] Its upper inner hole is machined with a standard "PEEK cap" threaded interface for connecting the upper logging instrument 13. A sealing gasket, usually an O-ring, is provided on the mating surface between the connector 1 and the upper pipe 201 to ensure pressure sealing.

[0056] The interior is machined with stepped through holes 101. The lower cavity of these through holes has a diameter of Φ30mm, slightly larger than the hammer head diameter of Φ28mm, forming a hammer head impact guide cavity. The inner wall of this cavity is coated with a titanium nitride (TiN) wear-resistant and friction-reducing coating using a physical vapor deposition (PVD) process to reduce wear caused by repeated impacts from the hammer head 4 and lower frictional resistance.

[0057] Its lower end face is machined with a protruding annular boss 102. The key to the invention lies in the fact that the annular tension / compression sensor 3 is connected to the annular boss 102 by integrally molding a thin-film strain gauge and an annular elastomer. Specifically, the annular boss 102 itself acts as an elastomer, and a Wheatstone bridge structure thin-film strain gauge is directly bonded to its inner annular region using a micro-arc welding process, followed by a vulcanization process to cover a protective layer. This makes the lower end face of the connector 1 both a mechanical structure that bears and transmits axial tension / compression and a sensitive part for sensing tension / compression, achieving deep integration. The sensor has a range of -500 kgf to +500 kgf and an accuracy of 0.5% FS.

[0058] 3. Impact actuator: hammer rod and hammer head 4 and impact electromagnet 5

[0059] The hammer rod and hammer head 4 are located below the connector 1 and above the impact electromagnet 5. The hammer rod is made of high-strength alloy steel, and the hammer head is made of tungsten alloy and is fixed to the top of the hammer rod.

[0060] The impact electromagnet 5 is fixedly installed in the inner cavity of the central tube 202 via a flange. Its core parameters are: rated operating voltage 24VDC, instantaneous operating current 7A, hammer force of 8kg, and stroke of 25mm within the range of 20-30mm. The electronic control unit 6 can control it to operate in an intermittent pulse mode, with the preferred operating mode being a cycle of 2 seconds of power-on and 4 seconds of power-off, and the vibration frequency can be adjusted within the range of 1-10 times / minute.

[0061] The coil frame and heat dissipation fins 8 of the impulse electromagnet 5 are an integral structure, cast from thermally conductive aluminum alloy. Multiple radial heat dissipation fins 8 extend outward from the frame. After the electromagnet is installed, the top of the heat dissipation fins 8 is tightly pressed against the electromagnetic shielding and thermally conductive intermediate layer 205 on the inner wall of the middle tube 202 with high thermal conductivity silicone grease, forming an efficient heat dissipation path from the electromagnet coil to the outer shell of the tube.

[0062] 4. Control and Sensing Core: Electronic Control Unit 6

[0063] The electronic control unit 6 is fixed inside the lower tube 203 by a bracket 12 made of titanium alloy.

[0064] Its core is a circular multilayer PCB board, sealed inside an aluminum alloy casing with heat dissipation fins.

[0065] The outer surface of the electronic control unit 6, specifically the inner wall, directly integrates the sensing elements of attitude and vibration sensors, such as MEMS gyroscope / accelerometer chips. These chips are directly mounted on the PCB and dissipated through the metal casing.

[0066] The metal casing of the electronic control unit 6 is in close contact with the electromagnetic shielding and thermally conductive intermediate layer 205 of the tube body 2 to achieve good thermal management and electromagnetic shielding.

[0067] The side of the housing is equipped with several gold-plated phosphor bronze elastic contacts. When the electronic control unit 6 is mounted and fixed by the bracket 12, these contacts are crimped and connected to the corresponding circuits of the sensor signal transmission and power distribution inner layer 206 on the inner wall of the lower tube 203, thereby obtaining power and communicating with the annular tension and compression sensor 3. This design achieves a "wireless" connection.

[0068] The electronic control unit 6 has a through hole machined in the center of its housing for the impact rod portion of the retractable emergency mechanical shock rod 7 to pass through. It also integrates a miniature electromagnetic locking pin that controls the locking and releasing of the retractable emergency mechanical shock rod 7.

[0069] 5. Energy and Emergency Response Agency: Battery Pack 9

[0070] The battery pack 9 is located at the bottom of the lower tube 203 and is an integrated structural and functional component.

[0071] It consists of eight 3.6V / 10AH lithium thionyl chloride battery cells arranged in a ring array, with an axial through-hole 901 naturally formed in the center. The total voltage of the battery pack is 28.8V.

[0072] A battery pack shock absorber sleeve 11 is fixedly installed on the outside of the battery pack 9. The shock absorber sleeve is made of silicone rubber and is used to buffer the impact of downhole vibration on the battery.

[0073] A retractable emergency mechanical shock rod 7 is installed within the axial through hole 901. The upper part of the shock rod is made of high-strength alloy steel, and the lower end is connected to a tungsten alloy mass block, supported in the middle by a pre-compressed disc spring. The upper end of the shock rod passes sequentially through the central hole of the battery pack and the central through hole of the electronic control unit 6. Its top end is mechanically coupled with the lower end face of the hammer rod and hammer head 4 through a small gap or connected by a detachable connecting component.

[0074] The shock rod is locked in the compressed, ready-to-fire position by a miniature electromagnetic locking pin inside the electronic control unit 6.

[0075] 6. Auxiliary functional components: bottom cover 10

[0076] The bottom cover 10 is detachably connected to the bottom end of the lower tube 203. The inner side of the bottom cover 10 integrates a wireless charging receiving coil and a PT1000 platinum resistance temperature sensor. The wireless charging coil facilitates contactless charging on the ground, and the temperature sensor monitors the internal temperature of the tool or the ambient temperature below.

[0077] Detailed description of the work process

[0078] Phase 1: Normal Delegation / Relocation and Intelligent Monitoring

[0079] The unblocking device is connected to the bottom of the logging instrument string via connector 1 and is lowered or pulled up with the instrument.

[0080] The electronic control unit 6 continuously acquires the axial force data measured by the annular tension and compression sensor 3 through the circuit of the inner layer 206 of the tube. When it is normally lowered, it is about the weight of the lower part of the instrument string, and when it is lifted, it is the tension.

[0081] Meanwhile, the electronic control unit 6 reads data from its integrated attitude and vibration sensors in real time. During normal operation, the instrument may experience slight positional changes and vibrations due to cable movement, well fluid flow, etc.

[0082] Phase Two: Intelligent Recognition of Card Encounter Status

[0083] The card decryptor uses dual logic channels for parallel judgment:

[0084] Logic A addresses the issue of the instrument string's main body getting stuck: When the main body of the instrument string, such as the push arm or the main housing, is stuck, the entire string stops moving. The electronic control unit 6 detects through the attitude sensor that the instrument remains in a static posture without any angular change, while the vibration sensor does not detect any characteristic vibrations caused by movement, and this state continues for more than a preset time, such as 8 seconds. The overall judgment is "the main body of the instrument is stuck."

[0085] Logic B addresses the issue of the releaser itself getting stuck: When the sticking point occurs within the releaser itself, the signal from the annular tension / compression sensor 3 undergoes a characteristic abrupt change. During descent, if the releaser is held up by the well wall, the weight of its upper instrument string cannot be transmitted, and the sensor reading will abnormally decrease from its normal value to near zero or even be under tension. During retrieval, if the releaser gets caught, all the retrieval force will be applied to it, and the sensor reading will abnormally increase. The electronic control unit 6 monitors this value in real time, and if it exceeds the set threshold range (pull force <5kg or >50kg), it is immediately determined that "the releaser itself is stuck."

[0086] Phase 3: Activation and Execution of Master Card Unlocking Mode

[0087] Once any of the above logical judgments is valid, the electronic control unit 6 will immediately activate the main card unlocking mode after a short delay of 3 seconds to prevent false judgments.

[0088] The electronic control unit 6 outputs a control signal to the impulse electromagnet 5, causing it to operate according to a preset intermittent pulse mode, such as being energized for 2 seconds and de-energized for 4 seconds.

[0089] When the electromagnet is energized, it generates a strong magnetic force, driving the internal moving iron core to connect with the hammer rod, causing the hammer rod and hammer head 4 to accelerate upwards rapidly. The hammer head 4 finally impacts the bottom of the guide cavity of the stepped through hole 101 at the lower part of the connector 1 with an impact force of about 8 kg, and the shoulder is coated with a wear-resistant coating.

[0090] The resulting upward impact vibration is efficiently transmitted to the entire logging instrument string through connector 1, acting on the stuck point to try to loosen the instrument.

[0091] During the unlocking process, the electronic control unit 6 continues to monitor sensor data. Once it detects that the instrument has resumed its motion posture or that the tension or compression has returned to normal range, it determines that the unlocking was successful and stops the electromagnet from operating.

[0092] Phase 4: Emergency Card Unlocking Mode Triggering and Execution Dual Protection

[0093] This mode is triggered under any of the following conditions:

[0094] Condition 1: Electronic control trigger: If the main card unlocking mode fails to work after 10 minutes, and the electronic control unit 6 detects a serious fault such as abnormal core voltage or memory error during self-test, it can actively issue a command before it completely fails.

[0095] Condition 2 Mechanical overload trigger: Ground operators discover an anomaly and apply a pulling force exceeding a set value, such as 300 kgf, to the cable using a winch.

[0096] Execution process:

[0097] The trigger signal de-energizes the electromagnetic locking pin of the retractable emergency mechanical shock rod 7, triggering an electronic control release or mechanical overload directly breaks the weak shear pin of the locking pin, triggering a mechanical release.

[0098] After the locking pin is released, the energy stored in the pre-tightened disc spring is released instantly, driving the entire telescopic emergency mechanical shock rod 7, especially the tungsten alloy mass block at its lower part, to be launched upward at high speed.

[0099] The upper end of the shock rod strikes the lower end of the hammer rod and the hammer head 4 with great kinetic energy.

[0100] This violent impact is converted by the hammer rod and hammer head 4 into a single, powerful upward impact that far exceeds the electromagnet mode, and is transmitted through the connector 1 as a final attempt to unlock the card.

[0101] Through the detailed structural design and working process described above, the invention achieves functions such as intelligent identification, dual-mode card unlocking, and high-reliability integration.

[0102] The above description is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the invention shall still fall within the protection scope of the invention.

Claims

1. A smart unblocking device for logging pipes, comprising a connector (1), a pipe body (2), an annular tension / compression sensor (3), a hammer rod and hammer head (4), an impact electromagnet (5), an electronic control unit (6), and a battery pack (9), characterized in that: The tube body (2) includes an upper tube (201), a middle tube (202) and a lower tube (203) connected in sequence by threads. The connector (1) is disposed in the upper tube (201), the impact electromagnet (5) is disposed in the middle tube (202), and the electronic control unit (6) and the battery pack (9) are disposed in the lower tube (203). The tube body (2) has a multi-layer composite structure, which includes, from the outside to the inside: a high-strength stainless steel shell as a pressure-bearing and sealing outer layer (204), a copper alloy mesh and thermally conductive silicone composite layer as an electromagnetic shielding and thermally conductive intermediate layer (205), and an insulating material layer with embedded micro-grooves and conductive foil as a sensor signal transmission and power distribution inner layer (206). The connector (1) is a multifunctional composite structure. Its lower part is connected to the upper tube (201). It has a stepped through hole (101) inside. The lower cavity of the stepped through hole (101) is coated with a wear-resistant and friction-reducing coating to form a hammer impact guide cavity. Its lower end face is provided with an annular boss (102). The annular tensile and compressive sensor (3) is connected to the annular boss (102) by means of a thin film strain gauge and an annular elastomer integrally formed. The battery pack (9) is a structural and functional integrated component. Its battery cells are arranged in a ring array with an axial through hole (901) in the center. A telescopic emergency mechanical shock rod (7) is installed in the axial through hole (901). The upper end of the telescopic emergency mechanical shock rod (7) passes through the electronic control unit (6) and is mechanically coupled to the hammer rod and hammer head (4), and is locked by an electromagnetic locking pin controlled by the electronic control unit (6).

2. The intelligent logging casing unblocking device according to claim 1, characterized in that: The working mode of the impact electromagnet (5) is intermittent pulse, the hammer force is 8kg, the vibration frequency is 1-10 times / minute, and the stroke is 20-30mm; the coil frame and heat dissipation fins (8) of the impact electromagnet (5) are an integral structure, and the heat dissipation fins (8) extend to contact the electromagnetic shielding and heat conduction intermediate layer (205) of the tube body (2).

3. The intelligent logging pipe unblocking device according to claim 2, characterized in that: The intermittent pulse working mode is 2 seconds of power-on and 4 seconds of power-off.

4. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: The sensor elements of attitude sensor and vibration sensor are directly integrated on the outer surface of the outer shell of the electronic control unit (6). The metal outer shell of the electronic control unit (6) is in close contact with the electromagnetic shielding and heat conduction intermediate layer (205) of the tube body (2), and is connected to the sensor signal transmission and power distribution inner layer (206) of the tube body (2) through contacts.

5. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: The connection points of the upper tube (201), middle tube (202) and lower tube (203) are provided with waterproof pin-socket structures to enable the connection between the power lines and signal lines in the inner layer of the sensor signal transmission and power distribution.

6. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: It also includes a bottom cover (10), which is detachably connected to the bottom end of the lower tube (203), and the inner side of the bottom cover (10) integrates a wireless charging receiving coil and a temperature sensor.

7. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: A sealing gasket is provided on the connector (1).

8. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: A battery pack shock absorber sleeve (11) is fixedly installed on the outside of the battery pack (9).

9. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: The electronic control unit (6) is fixedly installed inside the lower tube (203) by a bracket (12).

10. The intelligent unblocking device for logging pipes according to claim 1, characterized in that: When the electronic control unit (6) fails or the ground applies a lifting force exceeding the set value, the electromagnetic locking pin of the telescopic emergency mechanical shock rod (7) is released, causing the pre-tensioned spring to drive the telescopic emergency mechanical shock rod (7) to move upward and strike the hammer rod and hammer head (4).

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