Well cementation cement head

Abstract

The utility model discloses a well cementation cement head which comprises a body pipe, a stop pin assembly, an electric drive assembly and a hand drive assembly, the stop pin assembly can be inserted into the side wall of the body pipe in a sliding mode, a movable plate of the electric drive assembly is selectively and fixedly connected with the stop pin assembly, and a lifting rope of the hand drive assembly is fixedly connected with the stop pin assembly. When the movable plate is fixedly connected with the stop pin assembly, the electric drive assembly drives the stop pin assembly to slide relative to the body pipe through the movable plate, so that the stop pin assembly is opened or closed, and normal work of the stop pin assembly is ensured. Meanwhile, the stop pin assembly drives the hand-driven assembly to act synchronously through the lifting rope. When the electric drive assembly breaks down, the movable plate is separated from the stop pin assembly, the manual drive assembly drives the stop pin assembly to slide relative to the body pipe through the lifting rope, so that the stop pin assembly is opened or closed, normal work of the stop pin assembly can still be guaranteed, the problem that the stop pin assembly is not opened in place due to the fact that the electric drive assembly breaks down is solved, and the service life of the stop pin assembly is prolonged. The failure rate of the stop pin assembly is reduced, and the safety of well cementation construction is improved.

Description

Technical Field

[0001] This utility model relates to the field of cementing auxiliary equipment technology, and in particular to a cementing head. Background Technology

[0002] Cementing, as the final stage of well completion, involves injecting cement slurry into the well through the casing and returning through the cement head to the annular space between the casing and the wellbore, sealing the casing and wellbore to prevent groundwater and gas from entering the casing and to control bottomhole pressure. During cementing, the cement head is installed at the top of the casing, and a cement plug is installed inside the cement head. After grouting, the cement plug is pumped into the well by a pressure pump to isolate the cement slurry from the replacement fluid. The successful insertion of the cement plug determines the success or failure of the cementing operation; therefore, understanding its working condition is extremely important. If the retaining pin inside the cement head cannot be opened or the cement plug is not pressed down, cementing will not proceed smoothly or a cement plug may remain in the casing. This is especially problematic during oil well completion cementing operations, as a cement plug inside the casing can prevent the well from being put into production and incurs high subsequent well workover costs.

[0003] Existing technology uses remote control equipment to control the opening or closing of the stop pin, and uses the stop pin to limit the rubber plug. However, if the stop pin is not opened properly during use, the rubber plug will get stuck at the stop pin and will be difficult to move down, which will threaten the safety of cementing operations. Utility Model Content

[0004] The purpose of this invention is to provide a cementing head that, when the electric drive assembly fails, uses the lifting rope of the hand drive assembly to move the stop pin assembly, thus solving the problem of the stop pin assembly not opening properly due to the failure of the electric drive assembly, and improving the safety of cementing operations.

[0005] To achieve the above objectives, this utility model provides a cementing head, comprising:

[0006] body tube;

[0007] A stop pin assembly, which can be slidably inserted into the side wall of the main tube;

[0008] The electric drive assembly, the movable plate of the electric drive assembly, and the stop pin assembly are selectively fixed together;

[0009] The hand-drive assembly has its lifting rope fixedly connected to the stop pin assembly;

[0010] When the movable plate is fixedly connected to the stop pin assembly, the electric drive assembly drives the stop pin assembly to slide relative to the main tube through the movable plate, and the stop pin assembly drives the hand drive assembly to move synchronously through the lifting rope.

[0011] When the moving plate separates from the stop pin assembly, the hand drive assembly drives the stop pin assembly to slide relative to the main body tube via the lifting rope.

[0012] Preferably, it further includes a hand control box, and the hand drive assembly is disposed inside the hand control box; the hand drive assembly includes:

[0013] A rotating shaft is rotatably mounted inside the hand control box, and a winding wheel and a driven gear are fixed at both ends of the rotating shaft, respectively. The winding wheel is located outside the hand control box and is used to wind up or release the lifting rope.

[0014] A drive shaft is rotatably mounted through the hand control box; a drive gear and a handwheel are fixed at both ends of the drive shaft, with the drive gear meshing with the driven gear; the handwheel is located outside the hand control box.

[0015] Preferably, it further includes a reduction gearbox located inside the hand control box, the input end of which is fixedly connected to the drive shaft; the side wall of the hand control box is provided with a receiving groove; and it also includes:

[0016] A viewing window, with the viewing window cover located in a receiving groove; the viewing window is equipped with an indicator scale.

[0017] The indicator needle is located inside the viewing window; the indicator needle is fixedly connected to the output end of the gearbox.

[0018] When the stop pin assembly slides relative to the main tube, the stop pin assembly drives the hand drive assembly to move synchronously via the lifting rope. The drive shaft of the hand drive assembly drives the indicator needle to rotate synchronously via the reduction gearbox to display the current opening degree of the stop pin assembly.

[0019] Preferably, the drive shaft is fixedly provided with a stop plate, and the hand drive assembly further includes:

[0020] The reset torsion spring is sleeved on the rotating shaft, with its two ends abutting against the side wall of the hand control box and the stop plate, respectively. When the electric drive assembly stops driving, the reset torsion spring drives the winding wheel to wind up the loosened lifting rope through the rotating shaft, and drives the drive shaft to rotate until the drive shaft drives the indicator needle to reset through the reducer.

[0021] Preferably, it further includes an electrical control box, and the electric drive assembly is disposed inside the electrical control box; the electric drive assembly includes:

[0022] A drive screw is rotatably mounted inside the electrical control box and cooperates with a movable plate; a driven sprocket is fixedly mounted on the drive screw.

[0023] The main drive shaft has a drive motor and a drive sprocket fixed at both ends, and the drive sprocket and the driven sprocket are connected by a chain.

[0024] Preferably, the electric drive assembly further includes:

[0025] The wireless communication module is fixed inside the electrical control box;

[0026] The controller is fixed inside the electrical control box and is connected to both the wireless communication module and the drive motor. When the wireless communication module receives a stop opening signal from the remote control terminal, the controller starts the drive motor according to the signal sent by the wireless communication module.

[0027] Preferably, guide protrusions are fixed on both opposite sides of the movable plate, and guide grooves are provided on both side walls of the electrical control box, with the guide protrusions and guide grooves being slidably engaged.

[0028] Preferably, the stop pin assembly includes a connecting rod; a guide hole is provided through the side wall of the electrical control box, and a locking screw is slidably inserted in the guide hole, the locking screw passing through the movable plate until it is connected to the connecting rod; when the locking screw is fixedly connected to the connecting rod, the movable plate is fixedly connected to the stop pin assembly; when the locking screw is separated from the connecting rod, the movable plate is separated from the stop pin assembly.

[0029] Preferably, the external guide wheel is rotatably provided on the outside of the electrical control box, and the internal guide wheel is rotatably provided inside the electrical control box; the lifting rope passes around the external guide wheel and the internal guide wheel in sequence until it is fixedly connected to the end of the connecting rod.

[0030] Preferably, the stop pin assembly includes:

[0031] The stop pin is coaxially connected to the connecting rod as a single unit.

[0032] A reset spring is sleeved on the stop pin, with its two ends abutting against the outer walls of the connecting rod and the main body tube, respectively. When the locking screw separates from the connecting rod, the moving plate separates from the stop pin assembly. The reset spring assists the connecting rod in moving the stop pin into the main body tube until the stop pin assembly opens.

[0033] Compared to the prior art, this utility model adds a hand-operated assembly, which is fixedly connected to the stop pin assembly, while the electric drive assembly is selectively fixedly connected to the stop pin assembly. When the moving plate is fixedly connected to the stop pin assembly, the electric drive assembly drives the stop pin assembly to slide relative to the body tube via the moving plate, opening or closing the stop pin assembly and ensuring its normal operation. Simultaneously, the stop pin assembly drives the hand-operated assembly to move synchronously via the lifting rope. When the electric drive assembly malfunctions, the moving plate separates from the stop pin assembly, and the hand-operated assembly drives the stop pin assembly to slide relative to the body tube via the lifting rope, opening or closing the stop pin assembly, still ensuring its normal operation. This eliminates the problem of the stop pin assembly not opening properly due to a malfunction of the electric drive assembly, reducing the failure rate of the stop pin assembly and improving the safety of cementing operations. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0035] Figure 1 A diagram showing the open state of the cementing head provided in an embodiment of this utility model;

[0036] Figure 2 A diagram showing the closed state of the cement head provided in an embodiment of this utility model;

[0037] Figure 3 for Figure 1 Cross-sectional view of the central electrical control box, electric drive assembly, and stop pin assembly;

[0038] Figure 4 for Figure 1 Structural diagram of the central electrical control box and its accessories;

[0039] Figure 5 for Figure 1 Cross-sectional view of the manual control box and manual drive assembly.

[0040] The attached figures are labeled as follows:

[0041] 1. Main body tube; 2. Stop pin assembly; 3. Electric drive assembly; 4. Manual drive assembly; 5. Manual control box; 6. Gearbox; 7. Transparent window; 8. Indicator needle; and 9. Electric control box.

[0042] 11. Rubber stopper, 12. Pressure plug gate valve, 13. Cement gate valve, and 14.

[0043] Connecting rod 21, stop pin 22 and return spring 23;

[0044] The components include: a movable plate 31, a drive screw 32, a driven sprocket 33, a main drive shaft 34, a drive motor 35, a drive sprocket 36, a chain 37, a wireless communication module 38, and a controller 39.

[0045] Guide protrusion 311;

[0046] 41. Lifting rope, 42. Rotating shaft, 43. Winding wheel, 44. Driven gear, 45. Driven gear, 46. Handwheel, 47. Stop plate, 48. and return torsion spring, 49.

[0047] Receiving slot 51;

[0048] Guide groove 91, guide hole 92, locking screw 93, outer guide wheel 94 and inner guide wheel 95. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0050] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] This utility model discloses a cementing head, as shown in the attached figure. Figures 1 to 5 As shown, the system includes a main casing 1, a stop pin assembly 2, an electric drive assembly 3, and a manual drive assembly 4. The main casing 1 is a hollow structure and contains a rubber stopper 11. The rubber stopper 11 is used to separate the drilling fluid and cement slurry inside the casing to prevent them from mixing. The upper end of the main casing 1 is equipped with a plugging fluid gate valve 12, and the lower end of the main casing 1 is equipped with a cement gate valve 13 and a slurry displacement gate valve 14, respectively. The plugging fluid gate valve 12, cement gate valve 13, and slurry displacement gate valve 14 are configured to ensure that the cementing head can work normally by adjusting their openings.

[0052] The retaining pin assembly 2 is slidably inserted into the side wall of the main body tube 1, allowing it to slide radially relative to the main body tube 1. The retaining pin assembly 2 has two states: First, the retaining pin 22 of the retaining pin assembly 2 is inserted radially into the main body tube 1 from its side wall and abuts against the inner side wall of the main body tube 1. In this state, the retaining pin assembly 2 is in the open state, used to prevent the rubber stopper 11 from moving. (See attached diagram) Figure 1 As shown; secondly, the stop pin 22 is inserted into the side wall of the main body tube 1 but not into the main body tube 1. At this time, the stop pin assembly 2 is in the closed state, used to release the rubber plug 11, as shown in the attached figure. Figure 2 As shown.

[0053] The movable plate 31 of the electric drive assembly 3 is selectively fixed to the stop pin assembly 2, and the lifting rope 41 of the manual drive assembly 4 is fixed to the stop pin assembly 2. The manual drive assembly 4 has two functions: first, when the electric drive assembly 3 is working normally, the manual drive assembly 4 is used to provide torque for the rotation of the indicator needle 8; second, when the electric drive assembly 3 malfunctions, the manual drive assembly 4 is used to provide torque for the rotation of the indicator needle 8 and can also replace the electric drive assembly 3 to provide torque for the opening and closing of the stop pin assembly 2.

[0054] When the movable plate 31 is fixedly connected to the stop pin assembly 2, the electric drive assembly 3 drives the stop pin assembly 2 to slide relative to the main body tube 1 through the movable plate 31. At this time, the electric drive assembly 3 controls the stop pin assembly 2 to open or close in an electric drive manner to ensure the normal operation of the stop pin assembly 2. At the same time, the stop pin assembly 2 drives the hand drive assembly 4 to move synchronously through the lifting rope 41, so that the hand drive assembly 4 drives the indicator needle 8 to rotate. The indicator needle 8 displays the opening degree of the stop pin assembly 2 in real time, which makes it convenient to observe the opening and closing status of the stop pin assembly 2 intuitively, and avoids the situation where the stop pin 22 is not fully opened during use. Compared with the existing rubber stopper downward indicator, the structure is simpler and the cost is lower.

[0055] When the electric drive assembly 3 fails, the moving plate 31 separates from the stop pin assembly 2. The manual drive assembly 4 drives the stop pin assembly 2 to slide relative to the main body tube 1 through the lifting rope 41. At this time, the manual drive assembly 4 controls the stop pin assembly 2 to open or close in a manual drive manner, which can still ensure the normal operation of the stop pin assembly 2, eliminate the problem of the stop pin assembly 2 not opening properly due to the failure of the electric drive assembly 3, reduce the failure rate of the stop pin assembly 2, and improve the safety of cementing operations.

[0056] The cementing head also includes a hand control box 5, and a hand drive assembly 4 is located inside the hand control box 5. This is used to prevent foreign objects from affecting the normal operation of the hand drive assembly 4, reduce the failure rate of the hand drive assembly 4, and improve the reliability of the hand drive assembly 4.

[0057] As attached Figure 5 As shown, the hand-drive assembly 4 includes a rotating shaft 42 and a drive shaft 45, which are arranged in parallel. Both ends of the rotating shaft 42 are rotatably mounted inside the hand control box 5, and a winding wheel 43 and a driven gear 44 are respectively fixed at both ends of the rotating shaft 42, so that the rotating shaft 42 drives the winding wheel 43 to rotate synchronously under the drive of the driven gear 44. The winding wheel 43 is located outside the hand control box 5 and is used to wind up or release the lifting rope 41. The drive shaft 45 is rotatably mounted on the side wall of the hand control box 5. A driving gear 46 and a handwheel 47 are respectively fixed at both ends of the drive shaft 45; the driving gear 46 meshes with the driven gear 44; the handwheel 47 is located outside the hand control box 5.

[0058] When the handwheel 47 is turned, the handwheel 47 drives the drive gear 46 to rotate synchronously through the drive shaft 45. The drive gear 46 drives the driven gear 44 to rotate. The driven gear 44 drives the take-up wheel 43 to rotate through the rotating shaft 42. The take-up wheel 43 pulls the stop pin assembly 2 out of the body tube 1 through the lifting rope 41 until the stop pin assembly 2 is closed. The structure is relatively simple and the operation is relatively convenient.

[0059] The cementing head also includes a reduction gearbox 6 housed within the hand control box 5, with its input end fixedly connected to the drive shaft 45; the side wall of the hand control box 5 has a receiving groove 51. The cementing head also includes a viewing window 7 and an indicator needle 8. The viewing window 7 covers the receiving groove 51 and has an indicator scale. The indicator needle 8 is located within the viewing window 7 and is fixedly connected to the output end of the reduction gearbox 6. The viewing window 7 is made of a transparent material, such as plastic or glass.

[0060] When the stop pin assembly 2 slides relative to the main body tube 1, the stop pin assembly 2 drives the hand drive assembly 4 to move synchronously through the lifting rope 41. The drive shaft 45 of the hand drive assembly 4 drives the indicator needle 8 to rotate synchronously through the reduction gearbox 6, so as to display the current opening degree of the stop pin assembly 2 in real time, and facilitate the real-time judgment of the position of the stop pin 22 of the stop pin assembly 2.

[0061] Specifically, when the stop pin 22 of the stop pin assembly 2 slides into the main tube 1, the stop pin 22 pulls the lifting rope 41 through the connecting rod 21. The lifting rope 41 drives the winding wheel 43 to rotate. The winding wheel 43 drives the driven gear 44 to rotate through the rotating shaft 42. The driven gear 44 drives the driving gear 46 to rotate. The drive shaft 45 rotates synchronously with the driving gear 46. The drive shaft 45 drives the indicator needle 8 to rotate synchronously through the reduction gearbox 6. The opening and closing status of the stop pin assembly 2 is displayed intuitively by the indicator scale.

[0062] The drive shaft 45 is fixedly equipped with a stop plate 48. The hand drive assembly 4 also includes a reset torsion spring 49, which is sleeved on the rotating shaft 42. The two ends of the reset torsion spring 49 abut against the side wall of the hand control box 5 and the stop plate 48, respectively. When the electric drive assembly 3 drives the stop pin assembly 2 to slide into the main body tube 1, the stop pin assembly 2 drives the hand drive assembly 4 to move synchronously through the lifting rope 41. The reset torsion spring 49 rotates synchronously with the drive shaft 45 of the hand drive assembly 4 and undergoes elastic deformation. When the electric drive assembly 3 stops driving, the stop pin assembly 2 moves in the opposite direction and the lifting rope 41 is released. After the winding wheel 43 loses the restriction of the lifting rope 41, the reset torsion spring 49 restores its elastic deformation. The reset torsion spring 49 drives the winding wheel 43 to wind up the released lifting rope 41 through the rotating shaft 42, and drives the drive shaft 45 to rotate through the rotating shaft 42 until the drive shaft 45 drives the indicator needle 8 to reset through the reducer, so that the indicator needle 8 can automatically reset, making the operation more convenient.

[0063] As attached Figure 3As shown, the cementing head also includes an electrical control box 9, and the electric drive assembly 3 is located inside the electrical control box 9. The electrical control box 9 and the manual control box 5 are respectively located on both sides of the main body pipe 1. The electric drive assembly 3 includes a drive screw 32 and a main drive shaft 34. The drive screw 32 is rotatably located inside the electrical control box 9. The drive screw 32 cooperates with the moving plate 31. The drive screw 32 drives the moving plate 31 to make linear motion inside the electrical control box 9 by rotating. A driven sprocket 33 is fixedly mounted on the drive screw 32; a drive motor 35 and a drive sprocket 36 are fixedly mounted at both ends of the main drive shaft 34, and the drive sprocket 36 and the driven sprocket 33 are connected by a chain 37. When the drive motor 35 rotates, the drive sprocket 36 rotates synchronously with the main drive shaft 34. The drive sprocket 36 drives the driven sprocket 33 to rotate synchronously through the chain 37. The driven sprocket 33 drives the drive screw 32 to rotate. The drive screw 32 drives the moving plate 31 to move linearly. The moving plate 31 is fixedly connected to the stop pin assembly 2. The moving plate 31 drives the stop pin assembly 2 to move into the body tube 1 until the stop pin assembly 2 is fully opened.

[0064] As a preferred embodiment, to ensure the smooth sliding of the movable plate 31, two drive screws 32 are arranged inside the electrical control box 9. The two drive screws 32 are distributed vertically and pass through the upper and lower ends of the movable plate 31 respectively, so that the movable plate 31 is evenly stressed, preventing the movable plate 31 from getting stuck and causing the stop pin 22 to not open properly, reducing the failure rate and improving reliability.

[0065] The electric drive assembly 3 also includes a wireless communication module 38 and a controller 39. The wireless communication module 38 is fixed inside the electrical control box 9 and can be either a 4G module or a WIFI module. 4G stands for Fourth-generation mobile phone systems, and WIFI stands for Wireless Fidelity. The controller 39 is fixed inside the electrical control box 9 and is connected to both the wireless communication module 38 and the drive motor 35. When the wireless communication module 38 receives an opening signal for the stop pin 22 from the remote control terminal, the controller 39 starts the drive motor 35 according to the signal sent by the wireless communication module 38, thus automatically starting the drive motor 35 and automatically opening the stop pin assembly 2. This provides a high degree of automation and convenient operation.

[0066] It should be noted that this invention merely changes the application scenario of the controller 39, and does not constitute a substantial improvement thereto. The controller 39 with this structure is widely used in existing automatic control equipment, such as MCUs, DSPs, or microcontrollers. The key point of this invention is that the controller 39 combines the wireless communication module 38 and the drive motor 35.

[0067] Guide protrusions 311 are fixedly provided on two opposite sides of the movable plate 31, and guide grooves 91 are provided on both side walls of the electrical control box 9. The guide protrusions 311 and the guide grooves 91 are slidably engaged to guide the movable plate 31 to move linearly within the electrical control box 9, ensuring smooth movement of the movable plate 31 and preventing the stop from not opening properly due to sluggish movement of the movable plate 31. Of course, interchange the positions of the guide protrusions 311 and the guide grooves 91 without affecting the purpose of this utility model.

[0068] The stop pin assembly 2 includes a connecting rod 21; a guide hole 92 is provided through the side wall of the electrical control box 9, and a locking screw 93 is slidably inserted into the guide hole 92. The locking screw 93 passes through the movable plate 31 until it is connected to the connecting rod 21. This allows the movable plate 31 to move linearly relative to the electrical control box 9 using the guide hole 92, and also allows for the detachable connection between the movable plate 31 and the stop pin assembly 2. When the locking screw 93 is fixedly connected to the connecting rod 21, the movable plate 31 is fixedly connected to the stop pin assembly 2. When the locking screw 93 is separated from the connecting rod 21, the movable plate 31 is separated from the stop pin assembly 2.

[0069] The control box 9 has an externally rotatable guide wheel 94 and an internally rotatable guide wheel 95. The lifting rope 41 passes sequentially around the external guide wheel 94 and the internal guide wheel 95 to guide the lifting rope 41 to be fixedly connected to the end of the connecting rod 21, preventing the lifting rope 41 from contacting the control box 9 and being worn off. The side wall of the control box 9 has a wire hole for the lifting rope 41 to pass through.

[0070] The stop pin assembly 2 includes a stop pin 22 and a return torsion spring 49. The stop pin 22 is integrally and coaxially connected to the connecting rod 21, and the diameter of the stop pin 22 is smaller than the diameter of the connecting rod 21. The return tension spring 23 is sleeved on the stop pin 22, and its two ends abut against the outer walls of the connecting rod 21 and the main body tube 1, respectively. When the locking screw 93 is separated from the connecting rod 21, the moving plate 31 is separated from the stop pin assembly 2. The return tension spring 23 is used to assist the connecting rod 21 in moving the stop pin 22 into the main body tube 1 until the stop pin assembly 2 is opened, making operation more convenient. It should be noted that the elastic force of the return tension spring 23 is greater than that of the return torsion spring 49, so that the return tension spring 23 can overcome the tension of the lifting rope 41 and push the stop pin 22 into the main body tube 1.

[0071] The working principle of the cementing head provided by this utility model is as follows:

[0072] When the electric drive assembly 3 is working normally, the stop pin 22 is open: When the wireless communication module 38 receives the stop pin 22 opening signal from the remote control terminal, the controller 39 starts the drive motor 35 according to the signal sent by the wireless communication module 38; when the drive motor 35 rotates, the drive sprocket 36 rotates synchronously with the main drive shaft 34, the drive sprocket 36 drives the driven sprocket 33 to rotate synchronously through the chain 37, the driven sprocket 33 drives the drive screw 32 to rotate, the drive screw 32 drives the moving plate 31 to push the stop pin assembly 2 into the body tube 1 until the stop pin assembly 2 is fully open; at the same time, the stop pin 22 pulls the lifting rope 41 through the connecting rod 21, the lifting rope 41 drives the winding wheel 43 to rotate, the winding wheel 43 drives the driven gear 44 to rotate through the rotating shaft 42, the driven gear 44 drives the drive gear 46 to rotate, the drive shaft 45 rotates synchronously with the drive gear 46, the drive shaft 45 drives the indicator needle 8 to rotate synchronously through the reduction gearbox 6, and the indicator scale straight tube shows the open state of the stop pin assembly 2;

[0073] When the electric drive assembly 3 is working normally, the stop pin 22 is closed. Conversely, when the drive motor 35 changes its rotation direction, the main drive shaft 34 drives the drive screw 32 to rotate in the opposite direction through the drive sprocket 36, chain 37 and driven sprocket 33. The drive screw 32 drives the moving plate 31 to pull the stop pin assembly 2 out of the body tube 1 until the stop pin assembly 2 is completely closed. At the same time, when the stop pin assembly 2 moves in the opposite direction, the lifting rope 41 is released. After the winding wheel 43 loses the restriction of the lifting rope 41, the reset torsion spring 49 drives the rotating shaft 42 to rotate in the opposite direction by its elastic force. The rotating shaft 42 drives the winding wheel 43 to wind up the released lifting rope 41, and drives the drive shaft 45 to rotate through the rotating shaft 42 until the drive shaft 45 drives the indicator needle 8 to reset through the reducer.

[0074] When the electric drive assembly 3 malfunctions, the stop pin 22 opens: When the electric drive assembly 3 malfunctions, the locking screw 93 is unscrewed, the locking screw 93 separates from the connecting rod 21, the moving plate 31 separates from the stop pin assembly 2, and the reset spring 23 uses its elastic force to assist the connecting rod 21 in driving the stop pin 22 to move into the body tube 1 until the stop pin assembly 2 is fully opened.

[0075] When the electric drive assembly 3 malfunctions, the stop pin 22 closes: When the electric drive assembly 3 malfunctions, unscrew the locking screw 93, the locking screw 93 separates from the connecting rod 21, the moving plate 31 separates from the stop pin assembly 2, rotate the handwheel 47, the handwheel 47 drives the drive gear 46 to rotate synchronously through the drive shaft 45, the drive gear 46 drives the driven gear 44 to rotate, the driven gear 44 drives the winding wheel 43 to rotate through the rotating shaft 42, the winding wheel 43 pulls the stop pin assembly 2 out of the body tube 1 through the lifting rope 41 until the stop pin assembly 2 is completely closed.

[0076] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0077] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A cementing head, characterized in that, include: body tube(1); A stop pin assembly (2) is slidably inserted into the side wall of the main body tube (1); The electric drive assembly (3) has a movable plate (31) that is selectively fixed to the stop pin assembly (2); The hand-drive assembly (4) has a lifting rope (41) that is fixedly connected to the stop pin assembly (2); When the moving plate (31) is fixedly connected to the stop pin assembly (2), the electric drive assembly (3) drives the stop pin assembly (2) to slide relative to the main body tube (1) through the moving plate (31), and the stop pin assembly (2) drives the hand drive assembly (4) to move synchronously through the lifting rope (41). When the moving plate (31) is separated from the stop pin assembly (2), the hand drive assembly (4) drives the stop pin assembly (2) to slide relative to the main body tube (1) through the lifting rope (41).

2. The cement head according to claim 1, characterized in that, It also includes a hand control box (5), and the hand drive assembly (4) is disposed inside the hand control box (5); the hand drive assembly (4) includes: A rotating shaft (42) is rotatably disposed inside the hand control box (5), and a winding wheel (43) and a driven gear (44) are respectively fixed at both ends of the rotating shaft (42). The winding wheel (43) is located outside the hand control box (5) and is used to wind up or release the lifting rope (41). A drive shaft (45) is rotatably mounted on the hand control box (5); a drive gear (46) and a handwheel (47) are fixed at both ends of the drive shaft (45), the drive gear (46) meshes with the driven gear (44); the handwheel (47) is located outside the hand control box (5).

3. The cementing head according to claim 2, characterized in that, It also includes a reduction gearbox (6) disposed inside the hand control box (5), the input end of the reduction gearbox (6) being fixedly connected to the drive shaft (45); the side wall of the hand control box (5) is provided with a receiving groove (51); it also includes: A viewing window (7) is provided, which covers the receiving groove (51); the viewing window (7) is provided with an indicator scale; An indicator needle (8) is located inside the viewing window (7); the indicator needle (8) is fixedly connected to the output end of the gearbox (6); When the stop pin assembly (2) slides relative to the body tube (1), the stop pin assembly (2) drives the hand drive assembly (4) to move synchronously through the lifting rope (41), and the drive shaft (45) of the hand drive assembly (4) drives the indicator needle (8) to rotate synchronously through the reduction gearbox (6) to display the current opening degree of the stop pin assembly (2).

4. The cementing head according to claim 3, characterized in that, The drive shaft (45) is fixedly provided with a stop plate (48), and the hand drive assembly (4) further includes: A reset torsion spring (49) is sleeved on the rotating shaft (42). The two ends of the reset torsion spring (49) abut against the side wall of the hand control box (5) and the stop plate (48), respectively. When the electric drive assembly (3) stops driving, the reset torsion spring (49) drives the winding wheel (43) to wind up the loose lifting rope (41) through the rotating shaft (42), and drives the drive shaft (45) to rotate through the rotating shaft (42) until the drive shaft (45) drives the indicator needle (8) to reset through the reducer.

5. The cementing head according to any one of claims 1 to 4, characterized in that, It also includes an electrical control box (9), and the electric drive assembly (3) is disposed inside the electrical control box (9); the electric drive assembly (3) includes: A drive screw (32) is rotatably disposed inside the electrical control box (9), and the drive screw (32) cooperates with the moving plate (31); the drive screw (32) is fixedly provided with a driven sprocket (33). The main drive shaft (34) has a drive motor (35) and a drive sprocket (36) fixed at both ends. The drive sprocket (36) and the driven sprocket (33) are connected by a chain (37).

6. The cementing head according to claim 5, characterized in that, The electric drive assembly (3) also includes: Wireless communication module (38), which is fixed inside the electrical control box (9); The controller (39) is fixed inside the electrical control box (9). The controller (39) is connected to the wireless communication module (38) and the drive motor (35) respectively. When the wireless communication module (38) receives the stop pin (22) opening signal sent by the remote control terminal, the controller (39) is used to start the drive motor (35) according to the signal sent by the wireless communication module (38).

7. The cementing head according to claim 5, characterized in that, The movable plate (31) is fixed with guide protrusions (311) on both opposite sides, and the electrical control box (9) is provided with guide grooves (91) on both sides. The guide protrusions (311) and the guide grooves (91) can slide together.

8. The cement head according to claim 5, characterized in that, The stop pin assembly (2) includes a connecting rod (21); the side wall of the electrical control box (9) is provided with a guide hole (92), and a locking screw (93) is slidably inserted in the guide hole (92). The locking screw (93) passes through the moving plate (31) until it is connected to the connecting rod (21); when the locking screw (93) is fixedly connected to the connecting rod (21), the moving plate (31) is fixedly connected to the stop pin assembly (2); when the locking screw (93) is separated from the connecting rod (21), the moving plate (31) is separated from the stop pin assembly (2).

9. The cement head according to claim 8, characterized in that, The external guide wheel (94) is rotatably provided on the outside of the electrical control box (9), and the internal guide wheel (95) is rotatably provided inside the electrical control box (9); the lifting rope (41) passes around the external guide wheel (94) and the internal guide wheel (95) in sequence until it is fixedly connected to the end of the connecting rod (21).

10. The cementing head according to claim 8, characterized in that, The stop pin assembly (2) includes: The stop pin (22) is integrally and coaxially connected to the connecting rod (21); A reset spring (23) is sleeved on the stop pin (22). The two ends of the reset spring (23) abut against the outer side wall of the connecting rod (21) and the main body tube (1), respectively. When the locking screw (93) is separated from the connecting rod (21), the moving plate (31) is separated from the stop pin assembly (2). The reset spring (23) is used to assist the connecting rod (21) in driving the stop pin (22) to move into the interior of the main body tube (1) until the stop pin assembly (2) is opened.

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