Remote controlled gravity plug hoist release for graded cementer

Abstract

The present application relates to the tool technical field for cementing engineering, especially relates to a remote control type gravity plug hoisting release device for a staged cementing device, and aims to overcome the technical problem that the operation method of manually unlocking after binding a rope in the prior art causes the gravity plug to drop and threatens the safety of personnel and the rope is easy to slide into the cement head when being unlocked, increasing the complexity of construction. The remote control type gravity plug hoisting release device for the staged cementing device realizes temporary butt joint through the release assembly controlled by remote control and the gravity plug card joint, and then is put into the water through remote control operation to remove the connection, does not involve the separation action of manually unlocking the rope and does not contain the structure easy to fall off, so as to avoid the risk that the gravity plug drops and threatens the safety of personnel and the rope slides into the cement head, increasing the complexity of construction.

Description

Technical Field

[0001] This invention relates to the field of cementing engineering tools, and in particular to a remote-controlled gravity plug lifting and release device for a staged cementing machine. Background Technology

[0002] In cementing operations, a gravity plug needs to be inserted into the cement head to complete the secondary cementing task. However, in field operations, the gravity plug is usually tied with a steel wire rope or nylon rope, hoisted to the top of the cement head using a pneumatic hoist, and then manually untied to insert it into the cement head. Due to the height of the cement head, there is a risk of the gravity plug falling during hoisting, thus threatening personnel safety. Furthermore, when untying the rope, there is a risk that the rope may slip into the cement head, further increasing the complexity of the operation.

[0003] The existing gravity plug hoisting method has technical problems, such as the use of ropes for manual unlocking, which can lead to the gravity plug falling and threatening personnel safety, and the ropes easily slipping into the cement head during unlocking, increasing the complexity of construction. Summary of the Invention

[0004] The purpose of this invention is to provide a remote-controlled gravity plug hoisting and release device for a graded cement injector, so as to overcome the technical problems in related technologies, such as the gravity plug falling and threatening personnel safety due to the operation method of manually unlocking after tying ropes, and the rope easily slipping into the cement head during unlocking, which increases the complexity of construction.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] The remote-controlled gravity plug lifting and release device for a graded cement injector provided by the present invention includes:

[0007] The system includes a lifting unit, a drive assembly, a release assembly, a remote controller, and a gravity plug. The lifting unit is equipped with an ear loop. The release assembly is mounted on the end of the lifting unit furthest from the ear loop and is poweredly connected to the drive assembly. The remote controller controls the drive assembly to switch the release assembly between an expanded and a contracted state. In the expanded state, the release assembly engages with the gravity plug.

[0008] Specifically, the release assembly includes a release pawl and an expansion cone. The release pawl is mounted on the lifting part and has an elastically segmented structure with multiple pawl protrusions. The expansion cone is inserted into the release pawl and mates with its conical surface. The drive assembly is poweredly connected to the expansion cone and can drive the expansion cone to slide relative to the release pawl, thereby switching the release pawl between an expanded and a contracted state. The gravity plug has a limiting groove. In the expanded state, the elastically segmented structure expands radially, and each of the pawl protrusions engages with the limiting groove. In the contracted state, the elastically segmented structure contracts radially, and each of the pawl protrusions disengages from the limiting groove.

[0009] Specifically, the lifting unit includes a lifting housing, which comprises a sealed control chamber, a connecting sleeve, and a sliding chamber connected in sequence by threads. The lug is disposed in the sealed control chamber. The drive assembly includes a drive motor, a lead screw, and a sliding sleeve. The drive motor is mounted in the sealed control chamber, and the lead screw penetrates the connecting sleeve and is mounted on the output shaft of the drive motor. The sliding sleeve is slidably connected to the sliding chamber and threadedly connected to the lead screw. The expansion cone is mounted on the sliding sleeve, and the release pawl is mounted on the sliding chamber. The rotation of the lead screw drives the sliding sleeve to slide within the sliding chamber, thereby causing the expansion cone and the release pawl to slide relative to each other.

[0010] Specifically, the hoisting unit further includes a battery pack and a controller, both of which are housed within the sealed control compartment. The battery pack powers the controller and the drive assembly. The controller is equipped with a transmission module for establishing a communication connection between the remote controller and the drive assembly, with the remote controller connected to the drive assembly via the controller.

[0011] Specifically, the hoisting unit further includes a protective assembly, which includes a shock-absorbing pad, a limiting pad, an isolation sleeve, and fastening screws. The shock-absorbing pad, the battery pack, the limiting pad, the controller, and the isolation sleeve are disposed in the sealed control chamber and sequentially abut against the end of the drive motor away from the lead screw. The controller and the isolation sleeve are fixedly connected to the drive motor by the fastening screws.

[0012] Specifically, the sealed control compartment includes an upper cover and a motor housing, with the ear ring disposed on the upper cover. The upper cover and the motor housing are detachably connected by threads, and the threaded joint between the upper cover and the motor housing is flush with the end face of the battery pack, facilitating battery pack replacement.

[0013] Specifically, the drive assembly further includes a soft magnetic ring, which is mounted on the sliding sleeve and moves with it. The controller is also equipped with a magnetic signal sensing module for sensing the magnetic signal of the soft magnetic ring. The soft magnetic ring, in conjunction with the magnetic signal sensing module of the controller, determines the position of the sliding sleeve by detecting the magnetic signal of the soft magnetic ring, thereby achieving stroke control of the sliding sleeve.

[0014] Specifically, the drive assembly further includes a lead screw nut and a limiting screw. The lead screw nut is installed at the end of the lead screw away from the drive motor, and the limiting screw is installed at the end of the connecting sleeve near the sliding sleeve. The lead screw nut and the limiting screw limit the sliding stroke of the sliding sleeve by axially abutting against it.

[0015] Specifically, the drive assembly further includes an anti-rotation pin. The sliding sleeve includes a sliding nut and a telescopic cylinder. The sliding nut is threadedly connected to the lead screw, and both ends of the telescopic cylinder are threadedly connected to the sliding nut and the expansion cone, respectively. The telescopic cylinder has a guide groove, and the anti-rotation pin penetrates the release pawl and is inserted into the guide groove. The sliding of the anti-rotation pin along the guide groove prevents the sliding nut and the telescopic cylinder from rotating with the lead screw, thereby ensuring the threaded connection between the sliding nut and the lead screw. The rotation of the lead screw drives the sliding nut to move the telescopic cylinder along the axial direction of the release pawl, thereby causing the expansion cone and the release pawl to slide relative to each other.

[0016] Specifically, the gravity plug consists of a docking end cap, a conical body, lead pellets, and a sealing element. The docking end cap is installed on the conical body and forms a sealed chamber filled with lead pellets. The docking end cap has a limiting groove, and the sealing element is fitted onto the docking end cap.

[0017] Based on the above technical solutions, the beneficial effects of the present invention are analyzed as follows:

[0018] This invention provides a remote-controlled gravity plug lifting and release device for a graded cement injector, comprising:

[0019] The system includes a lifting unit, a drive assembly, a release assembly, a remote controller, and a gravity plug. The lifting unit is equipped with an ear loop. The release assembly is mounted on the end of the lifting unit furthest from the ear loop and is poweredly connected to the drive assembly. The remote controller controls the drive assembly to switch the release assembly between an expanded and a contracted state. In the expanded state, the release assembly engages with the gravity plug.

[0020] In practical application, when the first stage of cement injection in the graded cement injection process is completed and the gravity plug needs to be inserted, the operator uses the remote control to control the drive assembly, which switches the release assembly to the expanded state and engages with the gravity plug. The hook of the pneumatic hoist is then attached to the lug, and the hoist is lifted. The operator opens the top cover of the cement head and uses the pneumatic hoist to lift the gravity plug to the upper part of the cement head, slowly inserting it into the cement head. Once the gravity plug reaches the stop bar, it stops descending. The operator then uses the remote control to control the drive assembly, which switches the release assembly to the contracted state and separates it from the gravity plug. Under gravity, the gravity plug falls into the opening seat of the graded cement injector, completing the release.

[0021] As can be seen, compared with the existing technology, the remote-controlled gravity plug hoisting and release device for graded cement injectors achieves temporary docking by remotely controlling the release component to engage with the gravity plug, and then releases the device by remote control operation. It does not involve manual untying of the rope and does not contain any easily detachable structures, thereby avoiding the risk of the gravity plug falling and threatening personnel safety, as well as the risk of the rope slipping into the cement head and increasing the complexity of construction. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 A schematic diagram illustrating the working principle of the remote-controlled gravity plug lifting and release device for a graded cement injector provided in this embodiment of the invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram illustrating the working principle of the remote-controlled gravity plug lifting and release device used in a graded cement injector. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the remote-controlled gravity plug lifting and release device for a graded cement injector in its retracted state. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the structure of the remote-controlled gravity plug lifting and release device for a graded cement injector in its expanded state. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the structure at the gravity plug.

[0028] Figure 6 This is a schematic diagram of the upper end cap structure;

[0029] Figure 7 This is a schematic diagram of the telescopic cylinder structure;

[0030] Figure 8 A schematic diagram of the structure for releasing the pawl.

[0031] icon:

[0032] 100. Lifting unit; 110. Lifting housing; 111. Sealed control compartment; 1111. Top cover; 101. Earring; 1112. Motor compartment; 112. Connecting sleeve; 113. Sliding compartment; 120. Battery pack; 130. Controller; 140. Protective components; 141. Shock-absorbing pad; 142. Limiting pad; 143. Isolation sleeve; 144. Fastening screws;

[0033] 200. Drive assembly; 210. Drive motor; 220. Lead screw; 230. Sliding sleeve; 231. Sliding nut; 232. Telescopic cylinder; 201. Guide groove; 240. Soft magnetic ring; 250. Lead screw nut; 260. Limit screw; 270. Anti-rotation pin;

[0034] 300. Release component; 310. Release pawl; 301. Pawl protrusion; 320. Expanding cone;

[0035] 400. Gravity plug; 410. Connecting end cap; 401. Limiting groove; 420. Conical body; 430. Lead pellet; 440. Seal. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0039] The existing gravity plug hoisting method has technical problems, such as the use of ropes for manual unlocking, which can lead to the gravity plug falling and threatening personnel safety, and the ropes easily slipping into the cement head during unlocking, increasing the complexity of construction.

[0040] In view of this, the present invention provides a remote-controlled gravity plug lifting and release device for a graded cement injector, comprising:

[0041] The system comprises a lifting unit 100, a drive assembly 200, a release assembly 300, a remote controller, and a gravity plug 400. The lifting unit 100 is equipped with an ear loop 101. The release assembly 300 is mounted on the end of the lifting unit 100 furthest from the ear loop 101 and is poweredly connected to the drive assembly 200. The remote controller is used to control the drive assembly 200 to switch the release assembly 300 between an expanded state and a retracted state. In the expanded state, the release assembly 300 engages with the gravity plug 400.

[0042] In summary, the remote-controlled gravity plug lifting and release device for a graded cement injector provided by this invention can achieve the following technical effects:

[0043] The remote-controlled gravity plug hoisting and release device for graded cement injectors achieves temporary docking by engaging the release component 300 with the gravity plug 400 via remote control, and then releases the device by remote control operation. It does not involve manual untying of the rope and does not contain any easily detachable structures, thus avoiding the risks of the gravity plug falling and threatening personnel safety, as well as the risks of the rope slipping into the cement head and increasing construction complexity.

[0044] The following combination Figures 1 to 8 The structure and shape of the remote-controlled gravity plug lifting and release device for a graded cement injector provided in this embodiment are described in detail below:

[0045] Regarding the structural composition of the release component 300, specifically:

[0046] The release assembly 300 includes a release pawl 310 and an expansion cone 320. The release pawl 310 is mounted on the lifting part 100 and has an elastically segmented structure with multiple pawl protrusions 301. The expansion cone 320 is inserted into the release pawl 310 and mates with the conical surface of the release pawl 310. The drive assembly 200 is poweredly connected to the expansion cone 320 and can drive the expansion cone 320 to slide relative to the release pawl 310, thereby causing the release pawl 310 to switch between an expanded state and a contracted state. The gravity plug 400 has a limiting groove 401. In the expanded state, the elastically segmented structure expands radially, and each pawl protrusion 301 engages with the limiting groove 401. In the contracted state, the elastically segmented structure contracts radially, and each pawl protrusion 301 disengages from the limiting groove 401. The expansion cone 320 is conical, with the end closer to the lifting section 100 being the small-diameter end and the end farther from the lifting section 100 being the large-diameter end. In the retracted state, the release pawl 310 abuts against the small-diameter end. At this time, the radial dimension of each pawl protrusion 301 is smaller than the limiting groove 401, and the release pawl 310 separates from the gravity plug 400. The drive assembly 200 pulls the expansion cone 320 closer to the lifting section 100 along the axial direction of the release pawl 310, thereby causing the large-diameter end to abut against the release pawl 310, and the release assembly 300 switches to the expansion state. In the expansion state, the release pawl 310 abuts against the large-diameter end. At this time, each pawl protrusion 301 expands radially and engages with the limiting groove 401, and the release pawl 310 and the gravity plug 400 are engaged as one unit, achieving docking.

[0047] Regarding the structural composition of the driver component 200, specifically:

[0048] The lifting unit 100 includes a lifting housing 110, which comprises a sealed control chamber 111, a connecting sleeve 112, and a sliding chamber 113 connected in sequence by threads. An clevis 101 is disposed in the sealed control chamber 111. The drive assembly 200 includes a drive motor 210, a lead screw 220, and a sliding sleeve 230. The drive motor 210 is mounted in the sealed control chamber 111, and the lead screw 220 is mounted on the output shaft of the drive motor 210 through the connecting sleeve 112. The sliding sleeve 230 is slidably connected to the sliding chamber 113 and threadedly connected to the lead screw 220. An expansion cone 320 is mounted on the sliding sleeve 230, and a release pawl 310 is mounted on the sliding chamber 113. Rotation of the lead screw 220 drives the sliding sleeve 230 to slide within the sliding chamber 113, thereby causing relative sliding between the expansion cone 320 and the release pawl 310.

[0049] In this embodiment, the hoisting unit 100 further includes a battery pack 120 and a controller 130, both of which are housed in a sealed control compartment 111. The battery pack 120 supplies power to the controller 130 and the drive assembly 200. The controller 130 is equipped with a transmission module for establishing a communication connection between the remote controller and the drive assembly 200, allowing the remote controller to control the drive assembly 200 via the controller 130. The battery pack 120 features an explosion-proof design, conforming to the ATEX II2G Ex ib IIC T4 standard; a fast-charging interface supporting a full charge of 10Ah in 2 hours; and a low-temperature compensation function, maintaining over 80% capacity in an environment of -20℃.

[0050] To enhance the safety of the battery pack 120 and controller 130, in this embodiment, the hoisting unit 100 further includes a protective component 140. The protective component 140 includes a shock-absorbing pad 141, a limiting pad 142, an isolation sleeve 143, and fastening screws 144. The shock-absorbing pad 141, battery pack 120, limiting pad 142, controller 130, and isolation sleeve 143 are disposed in the sealed control chamber 111 and sequentially abut against the end of the drive motor 210 away from the lead screw 220. The controller 130 and isolation sleeve 143 are fixedly connected to the drive motor 210 by the fastening screws 144.

[0051] To improve the replacement efficiency of the battery pack 120, in this embodiment, the sealed control compartment 111 includes an upper cover 1111 and a motor housing 1112, with an earring 101 disposed on the upper cover 1111. The upper cover 1111 and the motor housing 1112 are detachably connected by threads, and the threaded joint of the upper cover 1111 and the motor housing 1112 is flush with the end face of the battery pack 120, facilitating the replacement of the battery pack 120.

[0052] Regarding how controller 130 performs stroke control of sliding sleeve 230, specifically:

[0053] The drive assembly 200 also includes a soft magnetic ring 240, which is mounted on the sliding sleeve 230 and moves with it. The controller 130 is further equipped with a magnetic signal sensing module for sensing the magnetic signal of the soft magnetic ring 240. The soft magnetic ring 240, in conjunction with the magnetic signal sensing module of the controller 130, determines the position of the sliding sleeve 230 by detecting the magnetic signal of the soft magnetic ring 240, thereby controlling the stroke of the sliding sleeve 230. When the magnetic signal sensing module receives an upward magnetic signal from the soft magnetic ring 240, indicating that the sliding sleeve 230 has reached its upward limit, the pawl 310 is released to complete radial expansion, the pawl protrusion 301 grips the gravity plug 400, and the drive motor 210 stops operating. When the magnetic signal sensing module receives a downward magnetic signal from the soft magnetic ring 240, indicating that the sliding sleeve 230 has reached its downward limit, the pawl 310 is released to complete radial contraction, the pawl protrusion 301 disengages from the gravity plug 400, and the drive motor 210 stops operating.

[0054] Regarding how the drive assembly 200 prevents the sliding sleeve 230 from having excessive travel and thus disengaging from the lead screw 220, specifically:

[0055] The drive assembly 200 also includes a lead screw nut 250 and a limiting screw 260. The lead screw nut 250 is mounted on the end of the lead screw 220 away from the drive motor 210, and the limiting screw 260 is mounted on the end of the connecting sleeve 112 near the sliding sleeve 230. The lead screw nut 250 and the limiting screw 260 limit the sliding stroke of the sliding sleeve 230 by axially abutting against it.

[0056] The remote-controlled gravity plug lifting and release device used in the graded cement injector is designed to prevent the sliding nut 231 from rotating with the lead screw 220, thereby disrupting the transmission relationship between the sliding nut 231 and the lead screw 220. Specifically:

[0057] The drive assembly 200 also includes an anti-rotation pin 270. The sliding sleeve 230 includes a sliding nut 231 and a telescopic cylinder 232. The sliding nut 231 is threaded to the lead screw 220, and the telescopic cylinder 232 is threaded to the sliding nut 231 and the expansion cone 320 at both ends, respectively. The telescopic cylinder 232 has a guide groove 201, and the anti-rotation pin 270 penetrates the release pawl 310 and is inserted into the guide groove 201. The sliding of the anti-rotation pin 270 along the guide groove 201 prevents the sliding nut 231 and the telescopic cylinder 232 from rotating together with the lead screw 220, thereby ensuring the threaded connection between the sliding nut 231 and the lead screw 220. The rotation of the lead screw 220 drives the sliding nut 231 to slide the telescopic cylinder 232 along the axial direction of the release pawl 310, thereby causing the expansion cone 320 to slide relative to the release pawl 310.

[0058] Regarding the structural composition of the Gravity Plug 400, specifically:

[0059] The gravity plug 400 consists of a docking end cap 410, a conical body 420, lead pellets 430, and a sealing element 440. The docking end cap 410 is installed on the conical body 420 and forms a sealed chamber filled with lead pellets 430. A limiting groove 401 is provided in the open inner cavity at the top of the docking end cap 410, and the sealing element 440 is sleeved on the docking end cap 410.

[0060] In summary, the specific working process of the remote-controlled gravity plug hoisting and release device for a graded cement injector provided in this embodiment is as follows:

[0061] Taking the initial state of the release component 300 as the contracted state as an example.

[0062] During the staged cement injection process on site, when the first stage of cement injection is completed and the gravity plug 400 needs to be inserted, the release pawl 310 is inserted into the open inner cavity at the top of the docking end cap 410.

[0063] The operator operates the remote control to start the drive motor 210, which drives the lead screw 220 to rotate forward. Under the guidance of the anti-rotation pin 270 and the guide groove 201, the sliding sleeve 230 and the expansion cone 320 move axially upward under the drive of the lead screw 220. When the controller 130 receives the upward position magnetic signal from the soft magnetic ring 240, the drive motor 210 stops running, the large diameter section of the expansion cone 320 abuts against the release pawl 310, the release pawl 310 expands radially, and each pawl protrusion 301 engages with the limiting groove 401, completing the docking of the release assembly 300 and the gravity plug 400.

[0064] Raise the remote-controlled gravity plug hoisting and release device to determine whether the remote-controlled gravity plug hoisting and release device is securely connected to the gravity plug 400.

[0065] Hang the hook of the pneumatic hoist inside the ear 101 of the upper cover 1111, and lift. The operator opens the top cover of the cement head, uses the pneumatic hoist to lift the gravity plug 400 to the upper part of the cement head, and slowly puts it into the cement head. After the gravity plug 400 reaches the stop bar, it stops descending.

[0066] The operator uses the remote control to start the drive motor 210, which in turn drives the lead screw 220 to rotate in the opposite direction. The sliding sleeve 230 and the expansion cone 320 move axially downwards under the influence of the lead screw 220. When the controller 130 receives the downward position magnetic signal from the soft magnetic ring 240, the drive motor 210 stops operating.

[0067] The release pawl 310 resets under its own elasticity and undergoes radial contraction. At this time, the expansion cone 320 returns to its initial position, and each pawl protrusion 301 disengages from the limiting groove 401 inside the gravity plug 400.

[0068] Slowly lift the device to check if the gravity plug 400 has been released. Once released, retrieve the remote-controlled gravity plug lifting and release device used for the graded cement injector and place it in the toolbox.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A remote-controlled gravity plug lifting and release device for a graded cement injector, characterized in that, include: The device comprises a hoisting unit (100), a drive assembly (200), a release assembly (300), a remote controller, and a gravity plug (400). The hoisting unit (100) is provided with an earring (101). The release assembly (300) is installed at the end of the hoisting unit (100) away from the earring (101) and is poweredly connected to the drive assembly (200). The remote controller is used to control the drive assembly (200) to drive the release assembly (300) to switch between an expanded state and a contracted state. In the expanded state, the release assembly (300) is engaged with the gravity plug (400). The release assembly (300) includes a release pawl (310) and an expansion cone (320). The release pawl (310) is installed on the hoisting part (100). The release pawl (310) has an elastic split structure and is provided with a plurality of pawl protrusions (301). The expansion cone (320) is inserted into the release pawl (310) and engages with the cone surface of the release pawl (310); The drive assembly (200) is poweredly connected to the expansion cone (320). The drive assembly (200) can drive the expansion cone (320) to slide relative to the release pawl (310), thereby driving the release pawl (310) to switch between an expanded state and a contracted state. The gravity plug (400) has a limiting groove (401); In the expanded state, the elastic segmented structure expands radially, and each of the ratchet protrusions (301) engages with the limiting groove (401); In the contracted state, the elastic segmented structure undergoes radial contraction, and each of the pawl protrusions (301) disengages from the limiting groove (401); The hoisting unit (100) includes a hoisting housing (110), which includes a sealed control chamber (111), a connecting sleeve (112), and a sliding chamber (113) connected in sequence by threads. The earring (101) is disposed in the sealed control chamber (111). The drive assembly (200) includes a drive motor (210), a lead screw (220), and a sliding sleeve (230); The drive motor (210) is installed in the sealed control chamber (111), and the lead screw (220) penetrates the connecting sleeve (112) and is installed on the output shaft of the drive motor (210); The sliding sleeve (230) is slidably connected to the sliding chamber (113) and threadedly connected to the lead screw (220); The expansion cone (320) is installed on the sliding sleeve (230), and the release pawl (310) is installed on the sliding chamber (113); The rotation of the lead screw (220) is used to drive the sliding sleeve (230) to slide in the sliding chamber (113), thereby causing the expansion cone (320) to slide relative to the release pawl (310); The drive assembly (200) also includes an anti-rotation pin (270); The sliding sleeve (230) includes a sliding nut (231) and a telescopic cylinder (232). The sliding nut (231) is threadedly connected to the lead screw (220), and the two ends of the telescopic cylinder (232) are respectively threaded to the sliding nut (231) and the expansion cone (320). The telescopic cylinder (232) has a guide groove (201), and the anti-rotation pin (270) penetrates the release pawl (310) and is inserted into the guide groove (201); The anti-rotation pin (270) slides along the guide groove (201) to prevent the sliding nut (231) and the telescopic cylinder (232) from rotating together with the lead screw (220), thereby ensuring that the sliding nut (231) and the lead screw (220) are threadedly connected. The rotation of the lead screw (220) drives the sliding nut (231) to cause the telescopic cylinder (232) to slide along the axial direction of the release pawl (310), thereby causing the expansion cone (320) to slide relative to the release pawl (310).

2. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 1, characterized in that: The hoisting unit (100) also includes a battery pack (120) and a controller (130), both of which are located in the sealed control compartment (111). The battery pack (120) is used to power the controller (130) and the drive assembly (200); The controller (130) is equipped with a transmission module, which is used to establish a communication connection between the remote controller and the drive component (200). The remote controller is connected to the drive component (200) through the controller (130).

3. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 2, characterized in that: The hoisting unit (100) also includes a protective assembly (140), which includes a shock-absorbing pad (141), a limiting pad (142), an isolation sleeve (143), and fastening screws (144). The shock-absorbing pad (141), the battery pack (120), the limiting pad (142), the controller (130), and the isolation sleeve (143) are disposed in the sealed control chamber (111) and abut against the end of the drive motor (210) away from the lead screw (220) in sequence; The controller (130) and the isolation sleeve (143) are fixedly connected to the drive motor (210) by the fastening screw (144).

4. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 3, characterized in that: The sealed control chamber (111) includes an upper cover (1111) and a motor housing (1112), and the earring (101) is disposed on the upper cover (1111); The upper end cover (1111) and the motor housing (1112) are detachably connected by threads. The threaded joint of the upper end cover (1111) and the motor housing (1112) is flush with the end face of the battery pack (120), which facilitates the replacement of the battery pack (120).

5. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 2, characterized in that: The drive assembly (200) further includes a soft magnetic ring (240), which is mounted on the sliding sleeve (230) and moves with the sliding sleeve (230); The controller (130) is also provided with a magnetic signal sensing module for sensing the magnetic signal of the soft magnetic coil (240); The soft magnetic ring (240) cooperates with the magnetic signal sensing module of the controller (130) to determine the position of the sliding sleeve (230) by detecting the magnetic signal of the soft magnetic ring (240), thereby realizing the stroke control of the sliding sleeve (230).

6. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 1, characterized in that: The drive assembly (200) further includes a lead screw nut (250) and a limiting screw (260). The lead screw nut (250) is installed at the end of the lead screw (220) away from the drive motor (210), and the limiting screw (260) is installed at the end of the connecting sleeve (112) near the sliding sleeve (230). The lead screw nut (250) and the limiting screw (260) limit the sliding stroke of the sliding sleeve (230) by axially abutting against it.

7. The remote-controlled gravity plug hoisting and release device for a graded cement injector according to claim 1, characterized in that: The gravity plug (400) consists of a docking end cap (410), a conical body (420), lead pellets (430), and a sealing element (440); The docking end cap (410) is installed on the conical body (420) and forms a sealed chamber, which is filled with lead pellets (430). The docking end cap (410) has the limiting groove (401), and the sealing element (440) is sleeved on the docking end cap (410).

Images