Electric unjamming fishing tool

Abstract

The application provides an electric unjamming fishing tool, which comprises a control system, a first motor assembly, an anchoring reciprocating mechanism, an anchoring mechanism, a second motor assembly, a lifting reciprocating mechanism and a lifting-retracting retrievable fishing head connected in sequence, the control system is in communication connection with the first motor assembly and the second motor assembly respectively and is used for controlling the start and stop of the first motor assembly and the second motor assembly, the first motor assembly is used for driving the axial movement of a part of the anchoring reciprocating mechanism to make the anchoring mechanism anchor or unanchor, the second motor assembly is used for driving the axial movement of a part of the lifting reciprocating mechanism to make the lifting-retracting retrievable fishing head unjam and fish, and the electric unjamming fishing tool further comprises an anchoring monitoring sensor used for monitoring the anchoring process of the anchoring mechanism and an unjamming fishing monitoring sensor used for monitoring the unjamming and fishing process of the lifting-retracting retrievable fishing head. The electric unjamming fishing tool is a sensor-equipped electric operation system, realizes the automatic operation of the unjamming and fishing process and reduces manual intervention and operation risks.

Description

Technical Field

[0001] This invention relates to the field of oil production engineering, and in particular to an electric unblocking and retrieval tool. Background Technology

[0002] Unsticking and retrieval is a crucial operation in the exploration and development of resources such as oil and natural gas, and it is also an important measure to ensure production safety and prevent environmental pollution. Unsticking and retrieval refers to the use of specific techniques and tools to remove drilling tools, equipment, and other items stuck in the well, restoring normal production or operational processes. Traditional unsticking and retrieval techniques are inefficient, unsafe, and inaccurate.

[0003] CN 111734336 Disclosure B discloses an electro-hydraulic throttle retrieval tool and its retrieval method. The outer casing contains, from top to bottom, an electronic sub-section, a hydraulically driven sub-section, and a self-resetting retrieval spear sub-section. The electronic sub-section is electrically connected to the hydraulically driven sub-section. The hydraulically driven sub-section uses hydraulic oil to push the self-resetting retrieval spear sub-section to grab the throttle. The hydraulically driven sub-section, from top to bottom, includes a connecting joint, a hydraulic balancing mechanism, a hydraulic power mechanism, and a drive cylinder mechanism. The lower end of the electronic sub-section is sealed and inserted into the connecting joint. The hydraulic balancing mechanism, hydraulic power mechanism, and drive cylinder mechanism are sequentially connected. The hydraulic power mechanism includes a motor, the output shaft of which is connected to a piston pump via a coupling. A one-way valve is installed at the piston pump's discharge port, and the one-way valve is connected to a solenoid valve. The hydraulic power mechanism also includes a pressure sensor immersed in the hydraulic oil for detecting hydraulic oil pressure, and a potentiometer for detecting the linear displacement of the first-stage piston. The motor, solenoid valve, pressure sensor, and potentiometer are all electrically connected to the electronic sub-section. The self-resetting retrieval spear sub-section includes, from top to bottom, a push rod, a push rod head, and a retrieval claw. This existing technology controls the motor via a ground control unit. The motor drives a plunger pump, which in turn pushes a push rod. The push rod then drives the retrieval head until the choke is released, effectively improving the success rate of downhole choke retrieval. This technology meets the requirements of safe, reliable, and low-cost retrieval technology and economy in gas field downhole choke retrieval. However, this existing technology does not disclose the anchoring mechanism. Furthermore, the disclosed structure of the retrieval tool and the fact that it retrieves a choke indicates that this existing technology is not suitable for retrieving large-tonnage items.

[0004] Therefore, there is room for improvement in electric unblocking and salvage tools suitable for large-tonnage items. Summary of the Invention

[0005] In view of this, the present invention provides an electric unlocking and retrieval tool to solve the problem of low retrieval efficiency for large-tonnage items.

[0006] To solve the above-mentioned technical problems, embodiments of the present invention provide an electric unlocking and retrieval tool, comprising a control system, a first motor assembly, an anchoring reciprocating mechanism, an anchoring mechanism, a second motor assembly, a lifting reciprocating mechanism, and a retractable retrieval head connected in sequence, wherein: The control system is communicatively connected to the first motor assembly and the second motor assembly, respectively, and is used to control the start and stop of the first motor assembly and the second motor assembly; The first motor assembly is used to drive a portion of the anchoring reciprocating mechanism to move axially so that the anchoring mechanism can anchor or de-anchor; The second motor assembly is used to drive a portion of the lifting reciprocating mechanism to move axially so that the retractable retrieval head can be released and retrieved. The electric release and retrieval tool also includes an anchoring monitoring sensor for monitoring the anchoring process of the anchoring mechanism and a release and retrieval monitoring sensor for monitoring the release and retrieval process of the retractable retrieval head. The control system is communicatively connected to the anchoring monitoring sensor and the release and retrieval monitoring sensor and is configured to control the start and stop of the first motor assembly and the second motor assembly based on the feedback data from the anchoring monitoring sensor and the release and retrieval monitoring sensor.

[0007] In some embodiments, the anchoring monitoring sensor is configured as a pressure sensor installed within the anchoring mechanism to monitor the anchoring process of the anchoring mechanism by detecting pressure data within the anchoring mechanism; and / or The unlocking and retrieval monitoring sensor is a displacement sensor installed inside the lifting reciprocating mechanism. It monitors the unlocking and retrieval process of the retractable retrieval head by detecting the displacement data of the lifting reciprocating mechanism.

[0008] In some embodiments, the anchoring reciprocating mechanism includes a first lead screw body and a first lead screw, a first lead screw nut, and a lead screw sleeve located inside the first lead screw body. The first lead screw is connected to the motor output shaft of the first motor assembly. The first lead screw nut is sleeved on the outside of the first lead screw and threadedly connected to the first lead screw. The first lead screw nut rotates with the first lead screw and makes axial linear movement. The lead screw sleeve is sleeved on the outside of the first lead screw and connected to the first lead screw nut. The lead screw sleeve is connected to a part of the anchoring mechanism for driving its axial movement.

[0009] In some embodiments, the first lead screw nut has a radially enlarging portion and a radially shrinking portion. The radially shrinking portion is connected to the lead screw cylinder. The radially enlarging portion has a first guide key on its exterior. The first lead screw body has a first guide groove that cooperates with the first guide key inside. When the first lead screw rotates, the first guide groove restricts the rotation of the first lead screw nut.

[0010] In some embodiments, the anchoring reciprocating mechanism includes a first retaining ring located inside the first lead screw body and two first bearings. The first retaining ring is sleeved outside the first lead screw and threadedly connected to the first lead screw body. The first lead screw has a first lead screw protrusion on its exterior. The two first bearings are both sleeved outside the first lead screw and located between the first retaining ring and the first protrusion inside the first lead screw body, and the two first bearings are respectively located on both sides of the first lead screw protrusion.

[0011] In some embodiments, the anchoring mechanism includes an outer tube, a hydraulic anchor body, a piston, an anchor claw, a pressure plate, and a spring. The hydraulic anchor body is threaded to one end of the outer tube outside the outer tube. The other end of the outer tube is connected to the first lead screw body of the anchoring reciprocating mechanism. The piston is disposed in the inner cavity of the outer tube and is threaded to the end of the lead screw cylinder of the anchoring reciprocating mechanism away from the first lead screw nut. The anchor claw is installed in the side hole of the hydraulic anchor body. The pressure plate is located outside the side hole and is fixedly connected to the hydraulic anchor body. The spring is disposed between the pressure plate and the anchor claw. The hydraulic anchor body has an inner cavity and the side hole communicates with the inner cavity of the body. The inner cavity of the body communicates with the inner cavity of the outer tube.

[0012] In some embodiments, the anchor claw is cylindrical and has an opening at its center. The opening is cylindrical and does not penetrate the anchor claw. The opening is used to accommodate the spring.

[0013] In some embodiments, the top of the anchor claw has a groove in the middle, which corresponds to the pressure plate. When the anchor claw moves toward the pressure plate, the pressure plate remains stationary relative to the hydraulic anchor body and is accommodated in the groove, while the rest of the anchor claw extends out from both sides of the pressure plate.

[0014] In some embodiments, the pressure plate is fixedly connected to the hydraulic anchor body by fixing nails.

[0015] In some embodiments, a force transmission medium is provided in the inner cavity of the outer tube and the inner cavity of the main body of the hydraulic anchor body, and a pressure sensor is installed in the inner cavity of the main body of the hydraulic anchor body.

[0016] In some embodiments, the second motor assembly includes a second motor and a second reducer connected to the second motor. The second reducer is a planetary reducer, including planetary gears, a planet carrier, a sun gear, and an external gear ring. The sun gear is connected to the output shaft of the second motor. The planetary gears are located between the sun gear and the external gear ring. The inner teeth of the planetary gears mesh with the teeth of the sun gear, and the outer teeth of the planetary gears mesh with the inner teeth of the external gear ring. The planetary gears are connected to the planet carrier via pins.

[0017] In some embodiments, the lifting reciprocating mechanism includes a second lead screw, a second bearing, a lead screw sleeve, a second lead screw nut, a locking sleeve, a split ring, and a first connecting body. One end of the second lead screw is connected to a second motor assembly, and the other end of the second lead screw is threadedly connected to the second lead screw nut, which moves axially linearly as the second lead screw rotates. The second bearing and the first connecting body are respectively sleeved on the outside of the second lead screw, with the second bearing located between the split ring and the first connecting body. The lead screw sleeve is sleeved on the outside of the second lead screw nut, and the outside of the lead screw sleeve is threadedly connected to the locking sleeve. The locking sleeve is fixedly connected to the first connecting body, and the end of the second lead screw nut away from the first connecting body is threadedly connected to one end of the lower connector.

[0018] In some embodiments, the second lead screw nut has a second guide key on the outside of one end adjacent to the first connecting body, and a second guide groove is provided inside the lead screw sleeve to cooperate with the second guide key. When the second lead screw rotates, the second guide groove restricts the rotation of the second lead screw nut.

[0019] In some embodiments, the segmented ring is configured with a clamping spring, wherein the segmented ring is an openable and closable ring-shaped device, the segmented ring is closable by the clamping spring, and the displacement sensor is mounted on the second lead screw nut.

[0020] In some embodiments, the retractable retrieval head includes an upper connector, a central rod, an outer sleeve, and a retrieval claw. One end of the upper connector is threadedly connected to the end of the lower connector away from the second lead screw nut, and the other end of the upper connector is threadedly connected to one end of the central rod. The retrieval claw is sleeved on the outside of the central rod, and the opening of the retrieval claw is restricted by the other end of the central rod. The outer sleeve is sleeved on the outside of the upper connector and the central rod, one end of the outer sleeve is slidably connected to the upper connector, and the other end of the outer sleeve is threadedly connected to the retrieval claw.

[0021] In some embodiments, an anti-rotation pin is provided between the threaded end of the upper connector and the center rod and the center rod to restrict the upper connector and the center rod and prevent the center rod from rotating relative to the upper connector.

[0022] In some embodiments, the upper connector has a first groove on the outside of the end that is threaded to the center rod, and a sliding pin is provided on the outer sleeve, with one end of the sliding pin passing through the outer sleeve and the other end of the sliding pin located in the first groove.

[0023] In some embodiments, the upper connector has a second groove on the outside of the end that is threaded to the center rod, and a shear pin is provided on the outer sleeve, with one end of the shear pin passing through the outer sleeve and the other end of the shear pin located in the second groove.

[0024] In some embodiments, the retrieval claw includes a retrieval claw body and a split claw, the split claw being fixedly connected to the retrieval claw body and opening when squeezed, and the other end of the central rod being designed to have a convex cross-section on a plane passing through the axis of the central rod.

[0025] In some embodiments, the retractable retrieval head includes a second outer cylinder and a guide cylinder, with one end of the second outer cylinder threadedly connected to the upper connector and the other end of the second outer cylinder threadedly connected to the guide cylinder.

[0026] Through the above technical solution, the electric unsticking and retrieval tool provided by this invention is an electric operating system with sensors, realizing automated operation of the unsticking and retrieval process, reducing manual intervention and operational risks. Furthermore, through intelligent monitoring technology, it monitors the unsticking and retrieval operation status in real time, promptly handles abnormal situations, and ensures operational safety. It can reduce well workover costs and time, and improve well workover efficiency and success rate. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a simplified diagram of the composition of the electric card-unlocking and retrieval tool disclosed in an embodiment of the present invention; Figure 2 This is a connection diagram of the electric card-unlocking and retrieval tool disclosed in an embodiment of the present invention; Figure 3 for Figure 2 The diagram between line AA and line BB shows a half-section of the anchoring reciprocating mechanism of the electric unblocking and retrieval tool disclosed in an embodiment of the present invention. Figure 4 for Figure 2 The diagram between the BB line and the CC line shows a half-section structural schematic of the anchoring mechanism of the electric card-unlocking and retrieval tool disclosed in an embodiment of the present invention. Figure 5 for Figure 2 The diagram between the CC line and the DD line shows a half-sectional view of the lifting reciprocating mechanism of the electric card-unlocking and retrieval tool disclosed in an embodiment of the present invention. Figure 6 for Figure 2 The diagram below the DD line shows a half-section of the retractable retrieval head of the electric unblocking and retrieval tool disclosed in an embodiment of the present invention. Figure 7 The image shows a top view of the pressure plate and anchor claw of the anchoring mechanism of the electric unblocking and retrieval tool disclosed in an embodiment of the present invention. Detailed Implementation

[0029] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0030] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0031] It should be noted that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0032] Furthermore, the terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible range of error. "Parallel" is not strictly parallel, but within the permissible range of error. Terms such as "including" or "comprising" indicate that the element preceding the term encompasses the element listed after it, without excluding the possibility of encompassing other elements as well.

[0033] It should also be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0034] like Figure 1 and Figure 2As shown, the electric unblocking and retrieval tool provided by the present invention includes a control system, a first motor assembly, an anchoring reciprocating mechanism 59, an anchoring mechanism 60, a second motor assembly, a lifting reciprocating mechanism 61, and a retractable retrieval head 62 connected in sequence. The control system is communicatively connected to both the first and second motor assemblies and is used to control their start and stop. The first motor assembly drives a portion of the anchoring reciprocating mechanism 59 to move axially, causing the anchoring mechanism 60 to anchor or unanchor. The second motor assembly drives a portion of the lifting reciprocating mechanism 61 to move axially, causing the retractable retrieval head 62 to unblock and retrieve the object.

[0035] In some embodiments, the electric release and retrieval tool further includes an anchoring monitoring sensor for monitoring the anchoring process of the anchoring mechanism 60 and a release and retrieval monitoring sensor for monitoring the release and retrieval process of the retractable retrieval head 62. The control system is communicatively connected to the anchoring monitoring sensor and the release and retrieval monitoring sensor and is configured to control the start and stop of the first motor assembly and the second motor assembly based on the feedback data from the anchoring monitoring sensor and the release and retrieval monitoring sensor.

[0036] In some embodiments, the anchoring monitoring sensor is configured as a pressure sensor 23 installed in the anchoring mechanism 60, which monitors the anchoring process of the anchoring mechanism 60 by detecting pressure data within the anchoring mechanism 60.

[0037] In some embodiments, the unlocking and retrieval monitoring sensor is configured as a displacement sensor 43 installed in the lifting reciprocating mechanism 61, which monitors the unlocking and retrieval process of the retractable retrieval head 62 by detecting the displacement data of the lifting reciprocating mechanism 61.

[0038] Compared with the prior art, the electric unblocking and retrieval tool of the present invention controls the anchoring reciprocating mechanism 59 to control the anchoring mechanism 60 to anchor or unanchor through the control system controlling the first motor assembly, and controls the lifting reciprocating mechanism 61 to control the lifting and releasing of the retractable retrieval head 62 to unblock and retrieve large-tonnage items through the control system controlling the second motor assembly.

[0039] In some embodiments, the electrically operated card-unlocking and retrieval tool includes a cable (not shown) connected to a control system. The control system obtains the electrical power required for operation via the cable. The control system is the core component of the electrically operated card-unlocking and retrieval tool. The control system includes a programmed circuit board configured to display the voltage and current values ​​of the first and second voltage components, as well as the travel position of the displacement sensor 43, and is equipped with overload protection.

[0040] In some embodiments, the control system is configured to receive instructions and, according to the instructions, automatically control a first motor assembly to anchor the electrically operated release and retrieval tool to a sleeve (not shown) and, according to the instructions, automatically control a second motor assembly to release and deploy the retractable retrieval head 62 for release and retrieval. In some cases, the control system may receive control instructions from the user via a cable. In other cases, the control system may also receive control instructions from the user via wireless communication technology.

[0041] In some embodiments, the electric card-unlocking and retrieval tool includes a ground controller. The ground controller can be a conventional controller in the art, or a mobile phone, computer, etc. The ground controller is configured to receive, display, analyze information from the control system and send instructions to the control system. This is conventional technology and will not be described in detail here.

[0042] In some embodiments, the control system is housed within the electronic junction housing 58, and is connected to one end of the cable located within the retrieval head 57. The connection of the cable and the control system is prior art and will not be described further.

[0043] In some embodiments, the first motor assembly includes a first motor and a first reducer connected to the first motor, and the second motor assembly includes a second motor and a second reducer connected to the second motor. The first motor assembly is designed to receive the output speed of the first motor through the first reducer and output the converted speed and torque, and the second motor assembly is designed to receive the output speed of the second motor through the second reducer and output the converted speed and torque.

[0044] In some embodiments, the first motor assembly is disposed between the control system and the anchoring reciprocating mechanism 59. Figure 2 The first motor assembly shown is housed within the outer casing 10, and the first reducer of the first motor assembly is connected to the anchoring reciprocating mechanism 59.

[0045] In some embodiments, the anchoring reciprocating mechanism 59 is located between the first motor assembly and the anchoring mechanism 60. For example... Figure 3As shown, the anchoring reciprocating mechanism 59 includes a first lead screw body 7 and a first retaining ring 2, a first lead screw 3, a first bearing 4, a first lead screw nut 5, and a lead screw cylinder 6 located inside the first lead screw body 7. The first retaining ring 2, the first lead screw 3, the first bearing 4, the first lead screw nut 5, the lead screw cylinder 6, and the first lead screw body 7 are coaxially arranged, and the first retaining ring 2, the first bearing 4, the first lead screw nut 5, and the lead screw cylinder 6 are each sleeved outside the first lead screw 3. The first retaining ring 2, the first bearing 4, the first lead screw nut 5, and the lead screw cylinder 6 are respectively located on the first protrusion inside the first lead screw body 7. 8. On both sides; at one end of the anchoring reciprocating mechanism 59 adjacent to the first motor assembly, the transmission sleeve 1 of the first reducer is connected to the irregular hole of the first lead screw 3 outside the first lead screw 3, the outer sleeve 10 of the first motor assembly is threadedly connected to the first lead screw body 7 outside the first lead screw body 7, and the first retaining ring 2 is threadedly connected to the first lead screw body 7; the first bearing 4 is located between the first retaining ring 2 and the first protrusion 8, the first lead screw nut 5 is threadedly connected to the first lead screw 3 and the first lead screw nut 5 moves axially linearly with the rotation of the first lead screw 3, and the first lead screw nut 5 is threadedly connected to the lead screw cylinder 6. The transmission sleeve 1 of the first reducer transmits torque to the first lead screw 3, thereby driving the first lead screw 3 to rotate. The first retaining ring 2 provides fixed support and preload for the first bearing 4.

[0046] In some embodiments, the first lead screw nut 5 has a radially enlarging portion and a radially shrinking portion. The radially shrinking portion is connected to the lead screw cylinder 6. The radially enlarging portion is one end of the first lead screw nut 5 adjacent to the first protrusion 8. The radially enlarging portion has a first guide key on its exterior. The first lead screw body 7 has a first guide groove inside that cooperates with the first guide key. When the first lead screw 3 rotates, the first guide groove restricts the rotation of the first lead screw nut 5. The first lead screw nut 5 can only move linearly in a straight line direction parallel to the axis of the first lead screw 3 and drive the lead screw cylinder 6 to move linearly in a straight line direction parallel to the axis of the first lead screw 3. That is, the lead screw cylinder 6 is the output end of the linear motion.

[0047] In some embodiments, the first lead screw 3 has a first lead screw protrusion 9 on its exterior, and the anchoring reciprocating mechanism 59 has two first bearings 4. The two first bearings 4 are both sleeved on the outside of the first lead screw 3 and located between the first retaining ring 2 and the first protrusion 8, and the two first bearings 4 are respectively located on both sides of the first lead screw protrusion 9. The two first bearings 4 are supported and pre-tightened on the first lead screw 3 by the first retaining ring 2.

[0048] In some embodiments, a first rubber ring 11 is provided between the first lead screw 3 and the first protrusion 8. For example, three first rubber rings 11 may be provided between the first lead screw 3 and the first protrusion 8.

[0049] In some embodiments, the first rubber ring 11 is made of rubber material.

[0050] In some embodiments, a groove for accommodating the first rubber ring 11 is provided on the outside of the first lead screw 3.

[0051] In some embodiments, a first outer cylinder 12 is provided outside the first lead screw body 7, and a first motor assembly outer sleeve 10 is also located inside the first outer cylinder 12. At one end of the anchoring reciprocating mechanism 59 adjacent to the first motor assembly, the first motor assembly outer sleeve 10 and the first lead screw body 7 are threadedly connected inside the first outer cylinder 12.

[0052] In some embodiments, a locking block 13 and a pin 14 are provided at the threaded connection between the first motor assembly outer sleeve 10 and the first lead screw body 7 for locking the first motor assembly outer sleeve 10 and the first lead screw body 7.

[0053] In some embodiments, the first motor of the first motor assembly rotates in the same direction as the first reducer. When the first motor rotates clockwise, the transmission sleeve 1 of the first reducer rotates clockwise, driving the first lead screw 3 to rotate, thus achieving linear motion of the lead screw cylinder 6 away from the transmission sleeve 1. When the first motor rotates counterclockwise, the transmission sleeve 1 of the first reducer rotates counterclockwise, driving the first lead screw 3 to rotate, thus achieving linear motion of the lead screw cylinder 6 towards the transmission sleeve 1. Alternatively, the opposite direction control settings can be configured to enable the first motor to achieve linear motion of the lead screw cylinder 6.

[0054] In some embodiments, the anchoring mechanism 60 is located between the anchoring reciprocating mechanism 59 and the second motor assembly. For example... Figure 4 As shown, the anchoring mechanism 60 includes an outer tube 15, a hydraulic anchor body 16, a piston 17, an anchor claw 18, a pressure plate 19, and a spring 20. The hydraulic anchor body 16 and the outer tube 15 are coaxially arranged, and the hydraulic anchor body 16 is threaded to one end of the outer tube 15 outside the outer tube 15. At one end of the anchoring mechanism 60 adjacent to the anchoring reciprocating mechanism 59, the other end of the outer tube 15 is connected to the first lead screw body 7 of the anchoring reciprocating mechanism 59. The piston 17 is disposed in the inner cavity of the outer tube 15 and is threaded to the end of the lead screw cylinder 6 of the anchoring reciprocating mechanism 59 away from the first lead screw nut 5. The anchor claw 18 is installed in the side hole of the hydraulic anchor body 16. The pressure plate 19 is located outside the side hole and is fixedly connected to the hydraulic anchor body 16. The spring 20 is disposed between the pressure plate 19 and the anchor claw 18. The hydraulic anchor body 16 has a main body cavity and the side hole communicates with the main body cavity. The main body cavity communicates with the inner cavity of the outer tube 15.

[0055] In some embodiments, the side hole is located on the side of the hydraulic anchor body 16 and does not penetrate the hydraulic anchor body 16. A first through hole 21 is provided between the bottom of the side hole and the main cavity of the hydraulic anchor body 16, so that the side hole communicates with the main cavity of the hydraulic anchor body 16.

[0056] In some embodiments, the side holes are cylindrical in shape.

[0057] In some embodiments, the anchor claw 18 is cylindrical and has an anchor claw opening at its center. The anchor claw opening is cylindrical and does not penetrate the anchor claw 18. The anchor claw opening is used to accommodate the spring 20. Under normal conditions, the bottom of the anchor claw 18 is located at the bottom of the side hole.

[0058] In some embodiments, the anchor claw 18 has a groove in the middle of its top, corresponding to the pressure plate 19. When the anchor claw 18 moves toward the pressure plate 19, the pressure plate 19 remains stationary relative to the hydraulic anchor body 16 and is accommodated in the groove, while the remaining portion of the anchor claw 18 extends from both sides of the pressure plate 19. The pressure plate 19 serves to fix the anchor claw 18, preventing it from completely disengaging from the side hole. Under normal conditions, one end of the spring 20 contacts the bottom of the anchor claw opening, and the other end of the spring 20 contacts the surface of the pressure plate 19 facing the groove. When the anchor claw 18 moves toward the pressure plate 19, the pressure plate 19 and the spring 20 cooperate to reset the anchor claw 18. Figure 7 The image shows a top view of the anchor claw 18 and the pressure plate 19.

[0059] In some embodiments, such as Figure 4 As shown, the anchoring mechanism 60 includes thirty-two anchor claws 18 evenly arranged along the main anchor body 16. These thirty-two anchor claws 18 are symmetrically arranged in four rows along the axis of the main anchor body 16, with eight anchor claws 18 evenly spaced in each row. The eight anchor claws 18 in two symmetrical rows are aligned with each other, and the eight anchor claws 18 in adjacent rows are staggered accordingly; that is, the midpoint of the line connecting any two adjacent anchor claws 18 in one row corresponds to one anchor claw 18 in the other row. This ensures that the anchoring mechanism 60 is stably anchored to the sleeve.

[0060] In some embodiments, the pressure plate 19 is fixedly connected to the hydraulic anchor body 16 by fixing nails 22.

[0061] In some embodiments, the fixing pin 22 is a screw.

[0062] In some embodiments, the spring 20 may be a cylindrical spring, a combination spring, or a rectangular spring.

[0063] In some embodiments, a force-transmitting medium is disposed in the inner cavity of the outer tube 15 and the inner cavity of the main body of the hydraulic anchor body 16. When the piston 17 moves toward the hydraulic anchor body 16, the piston 17 compresses the force-transmitting medium, thereby increasing the pressure of the force-transmitting medium in the inner cavity of the connected outer tube 15 and the inner cavity of the main body of the hydraulic anchor body 16. When the piston 17 moves away from the hydraulic anchor body 16, the pressure of the piston 17 on the force-transmitting medium decreases, thereby decreasing the pressure of the force-transmitting medium in the inner cavity of the connected outer tube 15 and the inner cavity of the main body of the hydraulic anchor body 16.

[0064] In some embodiments, the force transmission medium is hydraulic oil.

[0065] In some embodiments, the pressure sensor 23 is installed in the inner cavity of the main body of the hydraulic anchor body 16. The pressure sensor 23 is used to detect the pressure in the inner cavity of the main body of the hydraulic anchor body 16 and feed the detected value back to the control system. The pressure sensor 23 verifies whether the anchoring force is sufficient by displaying the pressure data, thereby monitoring the anchoring process of the anchoring mechanism 60, and thus enabling observation of numerical values ​​and timely and effective stopping of the rotation of the first motor.

[0066] In some embodiments, an adjusting ring 24 is provided between the other end of the outer tube 15 and the first lead screw body 7. The other end of the outer tube 15 is threadedly connected to one end of the adjusting ring 24, and the other end of the adjusting ring 24 is fixedly connected to the first lead screw body 7 by a release pin 25.

[0067] In some embodiments, when the first motor rotates forward, the lead screw 6 of the anchoring reciprocating mechanism 59 moves linearly away from the transmission sleeve 1. The lead screw 6 pushes the piston 17 to move toward the hydraulic anchor body 16. As the piston 17 compresses the force transmission medium, the pressure of the force transmission medium in the inner cavity of the connected outer tube 15 and the main body cavity of the hydraulic anchor body 16 increases. The radial force exerted by the force transmission medium on the anchor claw 18 through the first through hole 21 increases. The anchor claw 18 compresses the spring 20 and extends out from the side hole and anchors to the sleeve. When the first motor rotates in reverse, the lead screw 6 moves linearly toward the transmission sleeve 1. The lead screw 6 pulls the piston 17 away from the hydraulic anchor body 16. The pressure of the force transmission medium in the inner cavity of the connected outer tube 15 and the main body cavity of the hydraulic anchor body 16 decreases. The radial force exerted by the force transmission medium on the anchor claw 18 through the first through hole 21 decreases. Under the action of the spring 20, the anchor claw 18 returns to its original position.

[0068] In some embodiments, a second rubber ring 26 is provided between the piston 17 and the outer tube 15. For example, three second rubber rings 26 may be provided between the piston 17 and the outer tube 15.

[0069] In some embodiments, a third rubber ring 27 is provided between the outer tube 15 and the hydraulic anchor body 16. For example, two third rubber rings 27 are provided between the outer tube 15 and the hydraulic anchor body 16.

[0070] In some embodiments, a fourth rubber ring 28 is provided between the anchor claw 18 and the hydraulic anchor body 16 corresponding to the side of the side hole. For example, two fourth rubber rings 28 are provided between the anchor claw 18 and the hydraulic anchor body 16 corresponding to the side of the side hole.

[0071] The second rubber ring 26, the third rubber ring 27, and the fourth rubber ring 28 can be O-rings to prevent the force transmission medium from flowing out of the hydraulic anchor body 16.

[0072] The anchoring mechanism 60 is used to anchor the electric unlocking and retrieval tool to the casing, ensuring that the electric unlocking and retrieval tool remains stable and does not change position during the unlocking and retrieval process, and can withstand the upward reaction force during the unlocking and retrieval process.

[0073] In some embodiments, the second motor assembly is disposed between the anchoring mechanism 60 and the lifting reciprocating mechanism 61. Figure 4 and Figure 5 The second motor assembly shown is housed within the outer casing 29, and the second reducer of the second motor assembly is connected to the lifting reciprocating mechanism 61.

[0074] In some embodiments, the second reducer is a planetary reducer, including a planetary gear 30, a planet carrier 31, a sun gear 32, and an external gear ring 33. The sun gear 32 is connected to the output shaft of the second motor. The planetary gear 30 is located between the sun gear 32 and the external gear ring 33. The inner teeth of the planetary gear 30 mesh with the teeth of the sun gear 32, and the outer teeth mesh with the inner teeth of the external gear ring 33. The planetary gear 30 is connected to the planet carrier 31 through a pin 41.

[0075] In some embodiments, the lifting reciprocating mechanism 61 is located between the second motor assembly and the retractable retrieval head 62. For example... Figure 5 As shown, the lifting reciprocating mechanism 61 includes a second lead screw 34, a second bearing 35, a lead screw sleeve 36, a second lead screw nut 37, a locking sleeve 38, a split ring 39, and a first connecting body 40. At one end of the lifting reciprocating mechanism 61 adjacent to the second motor assembly, one end of the second lead screw 34 is connected to a shaped hole in the planetary carrier 31, and the other end of the second lead screw 34 is threadedly connected to the second lead screw nut 37, which moves axially linearly as the second lead screw 34 rotates. The second bearing 35 and the first connecting body 40 are respectively sleeved on the outside of the second lead screw 34, with the second bearing 35 located between the split ring 39 and the first connecting body 40. The lead screw sleeve 36 is sleeved on the outside of the second lead screw nut 37, and its exterior is threadedly connected to the locking sleeve 38. The locking sleeve 38 is fixedly connected to the first connecting body 40. Torque is transmitted to the second lead screw 34 through the planetary carrier 31 of the second reducer, causing the second lead screw 34 to rotate.

[0076] In some embodiments, the second lead screw nut 37 has a second guide key on the outside of one end adjacent to the first connecting body 40, and the lead screw sleeve 36 is provided with a second guide groove that cooperates with the second guide key. When the second lead screw 34 rotates, the second guide groove restricts the rotation of the second lead screw nut 37, and the second lead screw nut 37 can only move linearly in a straight line direction parallel to the axis of the second lead screw 34.

[0077] In some embodiments, the split ring 39 is provided with a clamping spring 42, wherein the split ring 39 is an openable and closable ring device, and the clamping spring 42 closing the split ring 39, the split ring 39 provides fixed support and preload for the second bearing 35.

[0078] In some embodiments, the displacement sensor 43 is mounted on the second lead screw nut 37. The displacement sensor 43 is used to monitor the lifting and lowering position of the second lead screw nut 37 (i.e., the stroke position of the displacement sensor 43) and feed the detected value back to the control system. By observing the changes in the displacement data displayed by the displacement sensor 43, the release and retrieval stroke of the retractable retrieval head 62 is monitored in real time, and the load of the second motor is determined by the change in stroke.

[0079] In some embodiments, the end of the second lead screw nut 37 furthest from the first connecting body 40 is threadedly connected to one end of the lower connector 44. The lower connector 44 moves with the movement of the second lead screw nut 37 and is the output end of linear motion. The lower connector 44 is a connecting structure used to connect to the lifting reciprocating mechanism 61 and the lifting and retractable retrieval head 62, respectively.

[0080] In some embodiments, the output shaft of the second motor of the second motor assembly rotates, driving the planetary gear 30 of the second reducer to rotate, which in turn drives the planetary carrier 31 to rotate, thereby driving the second lead screw 34 to rotate. The second lead screw 34 then drives the second lead screw nut 37 to lift or lower. The lifting or lowering of the second lead screw nut 37 is achieved by changing the rotation direction of the output shaft of the second motor, thereby causing the lower connector 44 to lift or lower along with the second lead screw nut 37.

[0081] In some embodiments, the second motor assembly is configured such that: when the second motor rotates forward, the planetary carrier 31 of the second reducer drives the second lead screw 34 to rotate, causing the second lead screw nut 37 to move linearly away from the planetary carrier 31, and causing the lower connector 44 to move linearly away from the planetary carrier 31; when the second motor rotates in reverse, the planetary carrier 31 of the second reducer drives the second lead screw 34 to rotate, causing the second lead screw nut 37 to move linearly toward the planetary carrier 31, and causing the lower connector 44 to move linearly toward the planetary carrier 31.

[0082] In some embodiments, a fifth rubber ring 45 is provided between the first connecting body 40 and the second lead screw 34. For example, three fifth rubber rings 45 may be provided between the first connecting body 40 and the second lead screw 34. In some embodiments, a groove for accommodating the fifth rubber ring 45 is provided inside the first connecting body 40.

[0083] In some embodiments, such as Figure 6As shown, the retractable retrieval head 62 includes an upper connector 46, a central rod 47, an outer sleeve 48, and a retrieval claw 49, all of which are coaxially arranged. One end of the upper connector 46 is threadedly connected to the end of the lower connector 44 furthest from the second lead screw nut 37. The other end of the upper connector 46 is threadedly connected to one end of the central rod 47. The retrieval claw 49 is sleeved on the outside of the central rod 47, and its opening is restricted by the other end of the central rod 47. The outer sleeve 48 is sleeved on the outside of the upper connector 46 and the central rod 47. One end of the outer sleeve 48 is slidably connected to the upper connector 46, and the other end of the outer sleeve 48 is threadedly connected to the retrieval claw 49.

[0084] In some embodiments, an anti-rotation pin 50 is provided between the threaded end of the upper connector 46 and the center rod 47 to restrict the upper connector 46 and the center rod 47 and prevent the center rod 47 from rotating relative to the upper connector 46.

[0085] In some embodiments, an anti-rotation pressure cap 51 is provided on the top of the anti-rotation pin 50. The anti-rotation pressure cap 51 cooperates with the anti-rotation pin 50 to further stabilize the anti-rotation pin 50 and limit the relative rotation of the upper connector 46 and the center rod 47.

[0086] In some embodiments, the upper connector 46 has a first groove 52 on the outside of the end that is threaded to the center rod 47, and a sliding pin 53 is provided on the outer sleeve 48. One end of the sliding pin 53 passes through the outer sleeve 48 and the other end is located in the first groove 52. The sliding of the sliding pin 53 in the first groove 52 allows the outer sleeve 48 to move relative to the upper connector 46.

[0087] In some embodiments, a second groove (not shown) is provided on the outer side of the end of the upper connector 46 that is threaded to the center rod 47, and a shear pin (not shown) is provided on the outer sleeve 48. One end of the shear pin passes through the outer sleeve 48 and the other end is located in the second groove. The second groove allows the shear pin to slide a certain distance. The second groove sets the retrieval position of the retrieval claw 49. When the shear pin slides in the second groove, the retrieval claw 49 is in the retrieval state. The shear pin is cut off when the retractable retrieval head 62 encounters a stuck tool and cannot retrieve the item, thereby canceling the retrieval by moving the outer sleeve 48 relative to the upper connector 46 with the sliding pin 53.

[0088] In some embodiments, the sliding pin 53 and the shear pin are arranged side by side along the circumferential direction of the upper connector 46, and the length of the second groove is less than the length of the first groove 52 along the axial direction of the upper connector 46.

[0089] In some embodiments, the sliding distance of the shear pin is 30-50 mm. For example, the sliding distance of the shear pin is 30 mm.

[0090] In some embodiments, the retrieval claw 49 includes a retrieval claw body and a split claw 54, the split claw 54 being fixedly connected to the retrieval claw body and opening when squeezed.

[0091] In some embodiments, the other end of the center rod 47 is located away from the upper connector 46, and the other end of the center rod 47 is designed with a convex cross-section in the plane passing through the axis of the center rod 47. That is, the diameter of the other end of the center rod 47 away from the upper connector 46 first increases and then decreases, so this end has an upward slope relative to the retrieval claw 49. Therefore, when the retrieval claw 49 moves along the other end of the center rod 47, the split claws 54 of the retrieval claw 49 open, and when the retrieval claw 49 moves back from the other end of the center rod 47, the split claws 54 of the retrieval claw 49 retract.

[0092] In some embodiments, the second groove is configured such that: when the shear pin moves away from the upper connector 46, the outer sleeve 48 causes the retrieval claw 49 to move away from the upper connector 46, and the retrieval claw 49 moves along the other end of the central rod 47; when the shear pin moves toward the upper connector 46, the outer sleeve 48 causes the retrieval claw 49 to move toward the upper connector 46, and the retrieval claw 49 moves back from the other end of the central rod 47.

[0093] In some embodiments, the retractable retrieval head 62 includes a second outer cylinder 55 and a guide cylinder 56. One end of the second outer cylinder 55 is threadedly connected to the upper connector 46, and the other end of the second outer cylinder 55 is threadedly connected to the guide cylinder 56. The second outer cylinder 55 and the guide cylinder 56 are sleeved outside the outer sleeve 48.

[0094] In some embodiments, when the second motor rotates forward, the second lead screw nut 37 of the lifting reciprocating mechanism 61 moves linearly away from the planetary carrier 31, causing the lower connector 44 to move linearly away from the planetary carrier 31. As a result, the lower connector 44 drives the upper connector 46 and the central rod 47 to move linearly away from the planetary carrier 31. The central rod 47 enters the jamming tool and continuously provides downward thrust to cause the split claw 54 of the retrieval claw 49 to jam the jamming tool. When the second motor rotates in reverse, the second lead screw nut 37 moves linearly toward the planetary carrier 31, causing the lower connector 44 to move linearly toward the planetary carrier 31. As a result, the lower connector 44 drives the upper connector 46 and the central rod 47 to move linearly toward the planetary carrier 31. The other end of the central rod 47 forces the split claw 54 of the retrieval head 49 to open and firmly jam the jamming tool.

[0095] The operation steps of the electric card-unlocking and retrieval tool of the present invention are as follows: First, on the ground, connect the electric card release and retrieval tool; Secondly, the electric unblocking and retrieval tool is lowered into the well to a designated depth by a cable car via a cable, and the depth is then checked via the cable. Secondly, after the location of the retrieval is accurately determined, the ground operator sends a command to the control system via computer. The control system controls the first motor of the first motor assembly to rotate forward, thereby controlling the screw cylinder 6 of the anchoring reciprocating mechanism 59 to move downward in a straight line. This pushes the piston 17 of the anchoring mechanism 60 downward to compress the force transmission medium in the anchoring mechanism 60, causing the anchor claw 18 of the anchoring mechanism 60 to extend and anchor to the sleeve. Secondly, the anchoring process of the anchoring mechanism 60 is monitored by the pressure data displayed by the pressure sensor 23. If the anchoring is unreliable, the control parameters of the first motor, including the voltage and current values, are changed, and the anchoring process is repeated until the anchoring is reliable. Secondly, after reliable anchoring, the ground operator sends a command to the control system via computer. The control system controls the second motor of the second motor assembly to rotate forward, thereby controlling the rotation of the second lead screw 34 of the lifting reciprocating mechanism 61. This rotation drives the second lead screw nut 37 to move downward in a straight line, which in turn drives the lower connector 44, which is threaded to the second lead screw nut 37, to move downward in a straight line. This, in turn, drives the upper connector 46 of the retractable retrieval head 62, which is threaded to the lower connector 44, to move downward in a straight line. This causes the central rod 47 to move downward in a straight line and enter the jamming tool, continuously providing downward thrust to cause the split claws 54 of the retrieval claw 49 to jam the jamming tool. The retrieval stroke is monitored by the detection value displayed by the displacement sensor 43: if the load of the second motor first increases and then decreases, and the stroke position of the displacement sensor 43 changes, it indicates that the jamming tool has moved and unjammed successfully; if the load of the first motor continues to increase until maximum power, and the stroke position of the displacement sensor 43 changes very little, it indicates that the jamming tool has failed to unjamm; if the load of the first motor changes very little, and the stroke position of the displacement sensor 43 changes continuously, it indicates that the jamming tool has not been retrieved. Secondly, when the jamming tool successfully moves and releases itself, the ground operator sends a command to the control system via computer. The control system then reverses the second motor, causing the central rod 47 of the retractable retrieval head 62 to move upward in a straight line. During this upward movement, the end of the central rod 47 away from the upper connector 46 forces the split claws 54 of the retrieval claw 49 to open and firmly jam the jamming tool, thus completing the process of releasing and retrieving the jamming tool. If the jamming tool fails to release itself or is not retrieved, the second motor can also be reversed to remove the central rod 47 and retrieval claw 49 of the retractable retrieval head 62 from the jamming tool. Secondly, the ground operator sends a command to the control system via computer. The control system controls the first motor to reverse and control the lead screw cylinder 6 of the anchoring reciprocating mechanism 59 to move upward linearly, thereby pulling the piston 17 of the anchoring mechanism 60 to move upward linearly. The pressure of the force transmission medium in the anchoring mechanism 60 decreases, and the anchor claw 18 of the anchoring mechanism 60 is reset under the action of the spring 20, releasing the anchoring of the sleeve. Secondly, once all the unsticking and retrieval operations for the well are completed, the cable is pulled up to retrieve the electric unsticking and retrieval tool.

[0096] Before the electric unblocking and retrieval tool of this invention is lowered into the well, it is tested on the ground, and any electronic or mechanical problems are resolved promptly. Due to the influence of well water, oil, silt, and high-temperature environments, various problems may arise during actual use. The electric unblocking and retrieval tool of the present invention is controlled by a ground controller on the ground, which saves time and effort. The anchoring process is monitored by the pressure sensor 23, which can stop the first motor of the first motor assembly in time according to the situation. The retrieval process is monitored by the displacement sensor 43, which can determine the lifting and lowering position of the second lead screw nut 37 of the lifting reciprocating mechanism 61. The unblocking and retrieval process is fast, accurate and powerful, reducing the labor intensity and operating cost of workers.

[0097] The detailed connection relationships of all related components are not described in this invention. The connection relationships of the omitted related components can be implemented using existing connection methods in the art, and therefore will not be described here.

[0098] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0099] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. An electric unlocking and retrieval tool, characterized in that, The system comprises, in sequence, a control system, a first motor assembly, an anchoring reciprocating mechanism (59), an anchoring mechanism (60), a second motor assembly, a lifting reciprocating mechanism (61), and a retractable retrieval head (62), wherein: The control system is communicatively connected to the first motor assembly and the second motor assembly respectively, and is used to control the start and stop of the first motor assembly and the second motor assembly; The first motor assembly is used to drive a portion of the anchoring reciprocating mechanism (59) to move axially so that the anchoring mechanism (60) anchors or de-anchors; The second motor assembly is used to drive a portion of the lifting reciprocating mechanism (61) to move axially so that the retractable retrieval head (62) can be released and retrieved. The electric unblocking and retrieval tool also includes an anchoring monitoring sensor for monitoring the anchoring process of the anchoring mechanism (60) and an unblocking and retrieval monitoring sensor for monitoring the unblocking and retrieval process of the retractable retrieval head (62). The control system is communicatively connected to the anchoring monitoring sensor and the unblocking and retrieval monitoring sensor and is configured to control the start and stop of the first motor assembly and the second motor assembly based on the feedback data of the anchoring monitoring sensor and the unblocking and retrieval monitoring sensor.

2. The electric unlocking and retrieval tool according to claim 1, characterized in that, The anchoring monitoring sensor is configured as a pressure sensor (23) installed within the anchoring mechanism (60) to monitor the anchoring process of the anchoring mechanism (60) by detecting pressure data within the anchoring mechanism (60); and / or The unblocking and retrieval monitoring sensor is configured as a displacement sensor (43) installed in the lifting reciprocating mechanism (61), which monitors the unblocking and retrieval process of the retractable retrieval head (62) by detecting the displacement data of the lifting reciprocating mechanism (61).

3. The electric unlocking and retrieval tool according to claim 2, characterized in that, The anchoring reciprocating mechanism (59) includes a first lead screw body (7) and a first lead screw (3), a first lead screw nut (5) and a lead screw cylinder (6) located inside the first lead screw body (7). The first lead screw (3) is connected to the motor output shaft of the first motor assembly. The first lead screw nut (5) is sleeved on the outside of the first lead screw (3) and threadedly connected to the first lead screw (3). The first lead screw nut (5) moves axially linearly as the first lead screw (3) rotates. The lead screw cylinder (6) is sleeved on the outside of the first lead screw (3) and connected to the first lead screw nut (5). The lead screw cylinder (6) is connected to a part of the anchoring mechanism (60) to drive its axial movement.

4. The electric unlocking and retrieval tool according to claim 3, characterized in that, The first lead screw nut (5) has a radially enlarging part and a radially shrinking part. The radially shrinking part is connected to the lead screw cylinder (6). The radially enlarging part has a first guide key on its outside. The first lead screw body (7) has a first guide groove inside that cooperates with the first guide key. When the first lead screw (3) rotates, the first guide groove restricts the rotation of the first lead screw nut (5).

5. The electric unlocking and retrieval tool according to claim 3, characterized in that, The anchoring reciprocating mechanism (59) includes a first retaining ring (2) located inside the first lead screw body (7) and two first bearings (4). The first retaining ring (2) is sleeved on the outside of the first lead screw (3) and threadedly connected to the first lead screw body (7). The first lead screw (3) has a first lead screw protrusion (9) on its outside. The two first bearings (4) are both sleeved on the outside of the first lead screw (3) and located between the first retaining ring (2) and the first protrusion (8) inside the first lead screw body (7). The two first bearings (4) are located on both sides of the first lead screw protrusion (9).

6. The electric unlocking and retrieval tool according to claim 3, characterized in that, The anchoring mechanism (60) includes an outer tube (15), a hydraulic anchor body (16), a piston (17), an anchor claw (18), a pressure plate (19), and a spring (20). The hydraulic anchor body (16) is threaded to one end of the outer tube (15) outside the outer tube (15). The other end of the outer tube (15) is connected to the first lead screw body (7) of the anchoring reciprocating mechanism (59). The piston (17) is disposed in the inner cavity of the outer tube (15) and the piston (17) is connected to the anchoring reciprocating mechanism (59). The end of the lead screw cylinder (6) away from the first lead screw nut (5) is threaded; the anchor claw (18) is installed in the side hole of the hydraulic anchor body (16); the pressure plate (19) is located outside the side hole and is fixedly connected to the hydraulic anchor body (16); the spring (20) is disposed between the pressure plate (19) and the anchor claw (18); the hydraulic anchor body (16) has a main body cavity and the side hole communicates with the main body cavity; the main body cavity communicates with the inner cavity of the outer tube (15).

7. The electric unlocking and retrieval tool according to claim 6, characterized in that, The anchor claw (18) is cylindrical and has an anchor claw opening at its center. The anchor claw opening is cylindrical and does not penetrate the anchor claw (18). The anchor claw opening is used to accommodate the spring (20).

8. The electric unlocking and retrieval tool according to claim 6, characterized in that, The anchor claw (18) has a groove in the middle of its top, which corresponds to the pressure plate (19). When the anchor claw (18) moves toward the pressure plate (19), the pressure plate (19) remains stationary relative to the hydraulic anchor body (16) and is contained in the groove, while the rest of the anchor claw (18) extends out from both sides of the pressure plate (19).

9. The electric unlocking and retrieval tool according to claim 6, characterized in that, The pressure plate (19) is fixedly connected to the hydraulic anchor body (16) by fixing nails (22).

10. The electric unlocking and retrieval tool according to claim 6, characterized in that, The inner cavity of the outer tube (15) and the inner cavity of the main body of the hydraulic anchor body (16) are provided with a force transmission medium, and the pressure sensor (23) is installed in the inner cavity of the main body of the hydraulic anchor body (16).

11. The electric unlocking and retrieval tool according to claim 1, characterized in that, The second motor assembly includes a second motor and a second reducer connected to the second motor. The second reducer is a planetary reducer, including a planetary gear (30), a planet carrier (31), a sun gear (32), and an external gear ring (33). The sun gear (32) is connected to the output shaft of the second motor. The planetary gear (30) is located between the sun gear (32) and the external gear ring (33). The inner teeth of the planetary gear (30) mesh with the teeth of the sun gear (32), and the outer teeth of the planetary gear (30) mesh with the inner teeth of the external gear ring (33). The planetary gear (30) is connected to the planet carrier (31) through a pin (41).

12. The electric unlocking and retrieval tool according to claim 2, characterized in that, The lifting reciprocating mechanism (61) includes a second lead screw (34), a second bearing (35), a lead screw sleeve (36), a second lead screw nut (37), a locking sleeve (38), a split ring (39), and a first connecting body (40). One end of the second lead screw (34) is connected to the second motor assembly, and the other end of the second lead screw (34) is threadedly connected to the second lead screw nut (37). The second lead screw nut (37) moves axially linearly as the second lead screw (34) rotates. The second bearing (35) and the first connecting body (40) are connected to the second motor assembly. The connecting body (40) is respectively sleeved on the outside of the second lead screw (34) and the second bearing (35) is located between the split ring (39) and the first connecting body (40). The lead screw sleeve (38) is sleeved on the outside of the second lead screw nut (37) and the outside of the lead screw sleeve (36) is threadedly connected to the locking sleeve (38). The locking sleeve (38) is fixedly connected to the first connecting body (40). The end of the second lead screw nut (37) away from the first connecting body (40) is threadedly connected to the end of the lower connector (44).

13. The electric unlocking and retrieval tool according to claim 12, characterized in that, The second lead screw nut (37) has a second guide key on the outside of one end adjacent to the first connecting body (40). The lead screw sleeve (36) has a second guide groove inside that cooperates with the second guide key. When the second lead screw (34) rotates, the second guide groove restricts the rotation of the second lead screw nut (37).

14. The electric unlocking and retrieval tool according to claim 12, characterized in that, The split ring (39) is equipped with a clamp spring (42), wherein the split ring (39) is an openable and closable ring device, and the split ring (39) is closable by the clamp spring (42), and the displacement sensor (43) is mounted on the second lead screw nut (37).

15. The electric unlocking and retrieval tool according to claim 12, characterized in that, The retractable retrieval head (62) includes an upper connector (46), a central rod (47), an outer sleeve (48), and a retrieval claw (49). One end of the upper connector (46) is threadedly connected to the end of the lower connector (44) away from the second lead screw nut (37). The other end of the upper connector (46) is threadedly connected to one end of the central rod (47). The retrieval claw (49) is sleeved on the outside of the central rod (47), and the opening of the retrieval claw (49) is restricted by the other end of the central rod (47). The outer sleeve (48) is sleeved on the outside of the upper connector (46) and the central rod (47). One end of the outer sleeve (48) is slidably connected to the upper connector (46), and the other end of the outer sleeve (48) is threadedly connected to the retrieval claw (49).

16. The electric unlocking and retrieval tool according to claim 15, characterized in that, An anti-rotation pin (50) is provided between the end of the upper connector (46) that is threaded to the center rod (47) and the center rod (47) to restrict the upper connector (46) and the center rod (47) and prevent the center rod (47) from rotating relative to the upper connector (46).

17. The electric unlocking and retrieval tool according to claim 15, characterized in that, The upper connector (46) has a first groove (52) on the outside of the end that is threaded to the center rod (47). The outer sleeve (48) is provided with a sliding pin (53). One end of the sliding pin (53) passes through the outer sleeve (48) and the other end of the sliding pin (53) is located in the first groove (52).

18. The electric unlocking and retrieval tool according to claim 15, characterized in that, The upper connector (46) has a second groove on the outside of the end that is threaded to the center rod (47), and a shear pin is provided on the outer sleeve (48). One end of the shear pin passes through the outer sleeve (48) and the other end of the shear pin is located in the second groove.

19. The electric unlocking and retrieval tool according to claim 15, characterized in that, The retrieval claw (49) includes a retrieval claw body and a split claw (54). The split claw (54) is fixedly connected to the retrieval claw body and opens when squeezed. The other end of the central rod (47) is designed to have a convex cross-section on the plane passing through the axis of the central rod (47).

20. The electric unlocking and retrieval tool according to claim 15, characterized in that, The retractable retrieval head (62) includes a second outer cylinder (55) and a guide cylinder (56). One end of the second outer cylinder (55) is threadedly connected to the upper connector (46), and the other end of the second outer cylinder (55) is threadedly connected to the guide cylinder (56).

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