A cement head device for well cementing

Abstract

This invention relates to a cementing head device for oil extraction, belonging to the field of oil extraction technology. It includes a cementing head body with an end cap threaded to its top. Two stop pins are threaded in a vertical linear array on the cementing head body. Three injection pipes are fixedly connected in a vertical linear array on the cementing head body, with the injection pipes and stop pins offset. Two rubber plugs are snapped into the cementing head body. An auxiliary component is provided on the cementing head body, including an integrated component and an installation component. The integrated component is used to switch the flow state of the three injection pipes, and the installation component is used to achieve rapid loading and precise release of the rubber plugs. Through the operation of the auxiliary component, a mechanical locking structure that can vertically extend into the cementing head body is used to achieve rapid loading, safe locking, and one-button precise release of the rubber plugs, greatly shortening the installation operation time and reducing human error.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, specifically to a cementing head device for oil extraction. Background Technology

[0002] Cement heads are critical wellhead devices in oil and gas well cementing operations. Installed between the top of the casing and the cementing manifold, their core function is to guide and control the deployment of rubber plugs, while simultaneously achieving precise switching and effective isolation of fluid channels during cementing operations. Specifically, their core functions include: safely loading upper and lower rubber plugs; orderly releasing rubber plugs according to the operational procedure to effectively separate different fluids; coordinating with cementing and displacement operations; ensuring precise injection of cement slurry into the annulus region of the casing and formation; and forming a dense and effective sealing barrier. This plays a vital role in ensuring wellbore integrity and improving the quality of cementing operations.

[0003] However, existing cementing heads generally suffer from prominent problems such as dispersed structure and cumbersome operation procedures. In the rubber plug placement process, most rely on manual filling and manual locking, lacking a rapid self-sealing and precise release mechanism. This makes them prone to problems such as plug placement failure and jamming due to human error, and may even induce downhole safety accidents. On the other hand, the fluid control system of cement heads typically employs a structure with multiple independent valves connected by flanges or unions. This discrete valve group layout significantly increases the number of connection and sealing points. Under high-pressure cementing operations, this type of structure is highly susceptible to sealing leaks, which not only reduces the system's pressure-bearing reliability but also significantly increases the workload and difficulty of on-site installation, disassembly, and maintenance. These problems not only prolong the preparation period for cementing operations and drastically reduce operational efficiency but may also induce well control safety risks, severely hindering further improvements in the safety and automation level of cementing operations. Summary of the Invention

[0004] A cementing head device for oil extraction includes a cement head body, an end cap threaded to the top of the cement head body, two stop pins threaded in a vertical straight array on the cement head body, three injection pipes fixedly connected in a vertical straight array on the cement head body, the injection pipes being offset from the stop pins, two rubber plugs being snapped into the cement head body, and an auxiliary component on the cement head body. The auxiliary component includes an integrated component and an installation component. The integrated component is used to switch the flow state of the three injection pipes, and the installation component is used to achieve rapid loading and precise release of the rubber plugs. The integrated component includes three connecting pipes, which are fixedly connected to the three injection pipes respectively. The ends of the three connecting pipes away from the cement head body are bent upwards, and the top ends of the three connecting pipes are evenly distributed in a triangular shape. The installation component includes four push rods and four suction cups, and the push rods are made of rubber.

[0005] Furthermore, the integrated component also includes a base plate, which is fixedly connected to the top of the three connecting pipes. A rotating plate is rotatably connected to the top of the base plate, and a servo motor is fixedly connected to the top of the base plate. The fixed end of the servo motor is connected to the output shaft, and the output shaft of the servo motor is fixedly connected to the lower surface of the rotating plate. A through hole is opened on the rotating plate, and the through hole is equal to the inner diameter of the connecting pipe. A positioning pipe is fixedly connected to the position of the corresponding through hole on the top surface of the rotating plate, and an outer pipe is threaded to the top of the positioning pipe.

[0006] Furthermore, the installation components also include a support rod, which is rotatably connected to the outer wall of the cement head body. A clamping plate is snapped onto the outer wall of the cement head body, and the clamping plate and the support rod are pressed together. A bearing plate is fixedly connected to the end of the support rod away from the cement head body. The support rod and the bearing plate are distributed perpendicularly. Four servo motors are fixedly connected to the bearing plate in a circular array. Each servo motor has a spool fixedly connected to its output shaft end, and a steel wire rope is fixedly connected to each spool.

[0007] Furthermore, each wire rope has a connecting block fixedly connected to its end away from the spool. The ends of the four connecting blocks away from the wire ropes are all fixedly connected to a support plate. Four suction cups are fixedly connected in a ring to the lower surface of the suction cup top. Four abutments are slidably connected to the four connecting blocks. Each abutment is fitted with a spring 1. A poking rod is fixedly connected to the end of each abutment away from the adjacent connecting block. A top rod is fixedly connected to each of the four abutments. The two ends of spring 1 are fixedly connected to the adjacent connecting block and the top rod, respectively. A guide rod is slidably connected to each top rod. A stop plate is fixedly connected to the ends of the four guide rods that are away from each other. A spring 2 is fitted to each of the four guide rods. The two ends of spring 2 are fixedly connected to the adjacent top rod and the stop plate, respectively. Multiple ball bearings are evenly rotatably connected to the side of each of the four stop plates that are away from each other. An electric push rod is fixedly connected to the top surface of the support plate. The electric push rod has a fixed shaft and a telescopic shaft. The telescopic shaft end of the electric push rod faces upwards, and a pointed cone is fixedly connected to the telescopic shaft end of the electric push rod.

[0008] Furthermore, the servo motor is positioned in a circle corresponding to the center of the base plate and the rotating plate. The lower surface of the rotating plate is provided with a slot to accommodate the servo motor, and the lower surface of the rotating plate fits tightly with the upper surface of the base plate.

[0009] Furthermore, the spool is rotatably connected to the bearing plate, the wire rope is wound around the spool, and the wire rope is slidably connected to the bearing plate.

[0010] Furthermore, the support plate is designed as a basin shape with four protrusions on the top.

[0011] Furthermore, the end of the abutment away from the adjacent connecting block is bent downwards, and the ends of the four abutments that are close to each other are all set as bevels, with the pointed cones pressing against the abutments.

[0012] Furthermore, the piercing rod is set at an angle, with the end of the piercing rod near the adjacent suction cup set as a beveled tip. The piercing rod is pressed and engaged with the adjacent suction cup, and the bottom end of the piercing rod is flush with the bottom surface of the support plate.

[0013] Furthermore, the bottom of the abutment is bent towards the support plate, and the abutment is made of rubber.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Firstly, through the operation of auxiliary components, a mechanical locking structure that can be vertically inserted into the cement head body is adopted to achieve rapid loading, safe locking, and one-button precise release of the rubber stopper, which greatly shortens the installation time of the rubber stopper and reduces human error.

[0015] Secondly, by using auxiliary components, multiple control valves in existing technologies are integrated into a compact, rotatable structure. By rotating to switch flow channels, flange connection points are reduced, leakage risk is lowered, and pressure resistance is improved. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall device of the present invention; Figure 2 This is a partial cross-sectional schematic diagram of the cement head body, connecting pipe, and other structures of the present invention; Figure 3 This is a cross-sectional schematic diagram of the cement head body, rubber plug, and other structures of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 6 This is a cross-sectional schematic diagram of the rotating plate, positioning tube, and other structures of the present invention; Figure 7 This is a schematic diagram showing the positions of the supporting plate, steel wire rope, and other structures of the present invention; Figure 8 This is a cross-sectional schematic diagram of the structure of the bearing plate, support plate, etc. of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point C in the middle; Figure 10 For the present invention Figure 8 Enlarged diagram of point D in the middle.

[0017] In the picture: 11. Cement head body; 12. End cap; 13. Stop pin; 14. Injection pipe; 15. Rubber stopper; Auxiliary components include integration components and mounting components.

[0018] Integrated components: 21. Connecting pipe; 22. Base plate; 23. Rotating plate; 24. Servo motor 1; 25. Through hole; 26. Positioning pipe; 27. Outer pipe; Installation components: 31. Support rod; 32. Clamping plate; 33. Bearing plate; 34. Servo motor II; 35. Bollard; 36. Steel wire rope; 37. Connecting block; 38. Support plate; 39. Suction cup; 310. Abutment rod; 311. Spring I; 312. Stamping rod; 313. Top rod; 314. Guide rod; 315. Abutment plate; 316. Spring II; 317. Ball bearing; 318. Electric push rod; 319. Cone. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention.

[0020] Reference Figures 1 to 10 As shown, a cementing head device for oil extraction includes a cement head body 11, an end cap 12 threadedly connected to the top of the cement head body 11, two stop pins 13 threadedly connected in a vertical straight array on the cement head body 11, three injection pipes 14 fixedly connected in a vertical straight array on the cement head body 11, the injection pipes 14 being offset from the stop pins 13, and two rubber plugs 15 being snapped into the cement head body 11.

[0021] Among them: the end cap 12 is used to seal the cement head body 11.

[0022] Specifically, one end of the retaining pin 13 extends into the cement head body 11, and the retaining pin 13 is used to fix the rubber plug 15 to prevent it from being released prematurely. The two rubber plugs 15 are the upper plug and the lower plug, and the two rubber plugs 15 correspond to the two retaining pins 13 respectively. The user can unscrew the retaining pin 13 by unscrewing the end of the retaining pin 13 that is inserted into the cement head body 11, so that the end of the retaining pin 13 is unscrewed from the cement head body 11, thereby no longer obstructing the falling of the rubber plug 15.

[0023] Among them, the three injection pipes 14 correspond to pumping cement slurry, replacement slurry and pre-filled liquid into the cement head body 11 respectively.

[0024] In the prior art, the top of the rubber stopper 15 is provided with a groove to guide fluid flow, reduce impact and pressure fluctuations, and make the rubber stopper 15 descend more smoothly.

[0025] The cement head body 11 is provided with auxiliary components, which include integration components and installation components.

[0026] The integrated component is used to switch the flow status of the three injection connectors 14.

[0027] The mounting components are used to enable the rapid loading and precise release of the rubber stopper 15.

[0028] The integrated component includes three connecting pipes 21, which are fixedly connected to three injection pipes 14 respectively. The ends of the three connecting pipes 21 away from the cement head body 11 are bent upwards. The top ends of the three connecting pipes 21 are fixedly connected to a base plate 22. A rotating plate 23 is rotatably connected to the top of the base plate 22. A servo motor 24 is fixedly connected to the top of the base plate 22. The fixed end of the servo motor 24 is connected to the output shaft. The output shaft of the servo motor 24 is fixedly connected to the lower surface of the rotating plate 23. A through hole 25 is opened on the rotating plate 23. The through hole 25 is equal to the inner diameter of the connecting pipe 21. A positioning pipe 26 is fixedly connected to the top surface of the rotating plate 23 at the position corresponding to the through hole 25. An outer pipe 27 is threadedly connected to the top end of the positioning pipe 26.

[0029] Among them, the top ends of the three connecting pipes 21 are distributed in a triangular pattern at equal intervals.

[0030] The servo motor 24 corresponds to the center of the base plate 22 and the rotating plate 23. The lower surface of the rotating plate 23 has a groove to accommodate the servo motor 24, and the lower surface of the rotating plate 23 fits tightly with the upper surface of the base plate 22. This is to seal the connecting pipe 21, which is not connected to the through hole 25, with the lower surface of the rotating plate 23.

[0031] Among them, the outer pipe 27 can be replaced with different pipes to switch between different grouting requirements.

[0032] The mounting components include a support rod 31, which is rotatably connected to the outer wall of the cement head body 11. A clamping plate 32 is snapped onto the outer wall of the cement head body 11, and the clamping plate 32 and the support rod 31 are pressed together. A bearing plate 33 is fixedly connected to the end of the support rod 31 away from the cement head body 11. The support rod 31 and the bearing plate 33 are distributed perpendicularly. Four servo motors 34 are fixedly connected in a ring array on the bearing plate 33. A bobbin 35 is fixedly connected to the output shaft end of each servo motor 34, and a steel wire rope 36 is fixedly connected to each bobbin 35.

[0033] Each wire rope 36 has a connecting block 37 fixedly connected to its end away from the spool 35. The ends of the four connecting blocks 37 away from the wire rope 36 are jointly fixedly connected to a support plate 38. Four suction cups 39 are fixedly connected in a ring shape to the lower surface of the top of the suction cups 39. Each of the four connecting blocks 37 has a sliding abutment rod 310. Each of the four abutment rods 310 is fitted with a spring 311. Each of the four abutment rods 310 has a fixed abutment rod 312 fixedly connected to its end away from the adjacent connecting block 37. Each of the four abutment rods 310 has a fixed push rod 313 fixedly connected to its end. The two ends of the springs 311 are respectively fixed to the adjacent connecting block 37 and the push rod 313. The connection includes a guide rod 314 slidably connected to each top rod 313, a stop plate 315 fixedly connected to the ends of the four guide rods 314 that are far apart from each other, a spring 316 sleeved on each of the four guide rods 314, and the two ends of the spring 316 fixedly connected to the adjacent top rod 313 and the stop plate 315 respectively. Multiple balls 317 are evenly rotatably connected to the sides of the four stop plates 315 that are far apart from each other. An electric push rod 318 is fixedly connected to the top surface of the support plate 38. The electric push rod 318 is divided into a fixed shaft and a telescopic shaft. The telescopic shaft end of the electric push rod 318 faces upward, and a pointed cone 319 is fixedly connected to the telescopic shaft end of the electric push rod 318.

[0034] Wherein: the spool 35 is rotatably connected to the bearing plate 33.

[0035] Among them, the wire rope 36 is distributed in a wound manner on the spool 35, and the wire rope 36 is slidably connected to the bearing plate 33.

[0036] Among them, the support plate 38 is configured as a basin shape with four protrusions on the top.

[0037] Among them: the end of the abutment 310 away from the adjacent connecting block 37 is bent downward, the abutment 310 is made of rubber, the ends of the four abutments 310 that are close to each other are all set as bevels, and the pointed cone 319 is pressed and fitted with the abutment 310.

[0038] Wherein: the piercing rod 312 is set at an angle, and the end of the piercing rod 312 near the adjacent suction cup 39 is set as a beveled tip. The piercing rod 312 is pressed and engaged with the adjacent suction cup 39, and the bottom end of the piercing rod 312 is flush with the bottom surface of the support plate 38.

[0039] Wherein: the bottom of the abutment plate 315 bends toward the support plate 38, and the abutment plate 315 is made of rubber.

[0040] In the initial state of the auxiliary components, i.e., when the cement head body 11 is not undergoing cementing operations, the structural states are as follows: the end cap 12 is threaded onto the cement head body 11, and both stop pins 13 are threaded onto the cement head body 11. Neither of the two rubber plugs 15 is inserted into the cement head body 11. The rotating plate 23 rotates on the base plate 22 until the through hole 25 is misaligned with the three connecting pipes 21, thus sealing all three connecting pipes 21. The positioning pipe 26 is not threaded with an outer pipe 27. The support rod 31 rotates on the cement head body 11 to a vertically downward position. All four wire ropes 36 are fully wound onto their corresponding spools 35. At this time, the distance between the support plate 38 and the bearing plate 33 is minimal. Spring 1 311 and Spring 2 316 did not undergo elastic deformation, the ends of the four abutments 310 that were close to each other were in contact with each other, the telescopic shaft of the electric push rod 318 did not extend, and the pointed cone 319 did not contact the abutment 310.

[0041] When the auxiliary components are running, i.e. when cement head body 11 needs to perform cementing operations, the user first installs the lower plug, and then the user screws the bottom stop pin 13 onto the cement head body 11, so that the stop pin 13 extends into the cement head body 11, while the top stop pin 13 remains unscrewed. At the same time, the user screws the end cap 12 out of the cement head body 11, so that the top of the cement head body 11 is exposed.

[0042] After completion, the user rotates the support rod 31 on the cement head body 11 until it is vertically upward. Then, the user attaches the clamping plate 32 to the cement head body 11. At this time, the clamping plate 32 and the support rod 31 are pressed against each other, thus restricting the rotation of the support rod 31 on the cement head body 11. Then, the user takes the rubber stopper 15 that needs to be installed at the bottom and presses the top surface of the rubber stopper 15 against the bottom surface of the support plate 38. At this time, the four suction cups 39 press against the rubber stopper 15, thus squeezing out the air between the suction cups 39 and the rubber stopper 15, forming a negative pressure adsorption between the suction cups 39 and the rubber stopper 15.

[0043] After completion, the user drives the electric push rod 318, which extends the telescopic shaft. The telescopic shaft of the electric push rod 318 drives the pointed cone 319 upward. As the pointed cone 319 moves upward, its tip inserts between the ends of the four abutments 310 that are close to each other. As the pointed cone 319 continues to move upward, its inclined surface presses against the inclined surfaces of the four abutments 310. Guided by the inclined surfaces, the four abutments 310 move outward at equal distances. The abutments 310 slide on the connecting block 37 away from the support plate 38, while the spring 311 is elastically stretched. As the four abutments 310 move outward at equal distances, their ends that are far apart from each other abut against the top groove wall of the rubber stopper 15, forming a compression limit on the rubber stopper 15. At this time, the electric push rod 318 stops extending, maintaining the current state where the four abutments 310 are pressed against the rubber stopper 15. At this time, the rubber stopper 15 is limited by the four push rods 310 tightening the inner wall, and at the same time, the rubber stopper 15 is limited by the four suction cups 39 through negative pressure adsorption, and thus the rubber stopper 15 is limited and fixed on the support plate 38.

[0044] After completion, the user simultaneously drives four servo motors 34. As the four servo motors 34 operate and under the weight of the structure at the bottom of the steel wire rope 36, the four steel wire ropes 36 are unwound from their corresponding spools 35, causing the support plate 38 to move the rubber plug 15 downwards. At this point, the rubber plug 15 moves downwards and inserts into the cement head body 11. During this process, the bottom slope of the abutment plate 315 abuts against and presses against the inner wall of the cement head body 11. Guided by the slope, the abutment plate 315 pushes the corresponding guide rod 314 to slide towards the top rod 313, simultaneously causing the spring 316 to be elastically compressed. At this point, the four abutment plates 315 move equidistantly towards the support plate 38. As the rubber plug 15 moves downwards inside the cement head body 11, the abutment plates 315 gradually move down until the ball bearing 317 contacts the inner wall of the cement head body 11.

[0045] It should be noted that during the downward movement of the rubber stopper 15 inside the cement head body 11, the ball bearing 317 contacts and rolls against the inner wall of the cement head body 11, which helps to correct the downward movement path of the rubber stopper 15 and ensures that the rubber stopper 15 falls vertically inside the cement head body 11. At the same time, the rolling of the ball bearing 317 reduces the friction between the rubber stopper 15 and the inner wall of the cement head body 11.

[0046] As the rubber stopper 15 moves vertically downward inside the cement head body 11, when it reaches the stop pin 13 currently inserted into the cement head body 11, the stopper 15 is restricted from falling by the stop pin 13, and at this time the stopper 15 reaches the installation position inside the cement head body 11. The user drives the telescopic shaft of the electric push rod 318 to retract, and the telescopic shaft of the electric push rod 318 drives the cone 319 to move downward, so that the cone 319 no longer presses against the four abutment rods 310. Under the elastic reset action of the first spring 311, the four abutment rods 310 move together at equal distances, so that the four abutment rods 310 no longer press against the rubber stopper 15. At the same time, driven by the abutment rods 310, the push rod 313 synchronously drives the abutment plate 315 to move towards the support plate 38, so that the ball 317 no longer presses against the cement head body 11, and at this time the second spring 316 elastically resets. As the push rod 310 moves and resets, the sticking rod 312 is driven to move toward the corresponding suction cup 39. During this process, the inclined surface of the sticking rod 312 is inserted into the mating surface of the suction cup 39 and the rubber plug 15. As the sticking rod 312 is inserted, external air is injected between the suction cup 39 and the rubber plug 15, thereby releasing the suction state between the suction cup 39 and the rubber plug 15. At this time, the push rod 310 is no longer pressed and limited by the rubber plug 15, and the suction cup 39 is no longer suction and limited by the rubber plug 15. Thus, the rubber plug 15 is released from the limiting state of the support plate 38.

[0047] At this point, the user drives the output shaft of servo motor 34 to reverse, which in turn drives spool 35 to rotate in the opposite direction. As spool 35 reverses, it winds up the wire rope 36, thereby moving the support plate 38 upward. The support plate 38 and its structure are then moved upward inside the cement head body 11, leaving the rubber plug 15 inside. When spool 35 has fully wound up the wire rope 36, the support plate 38 is completely disengaged from the cement head body 11. The user can then repeat the above operation to install another rubber plug 15.

[0048] After both rubber plugs 15 are installed in place, when it is necessary to pump fluid, the user pulls the clamping plate 32 off the cement head body 11, then rotates the support rod 31 to face vertically downwards, and then the bearing plate 33 is removed from the top of the cement head body 11. At this time, the installation parts are completely reset, and the user screws the end cap 12 onto the cement head body 11 to seal the cement head body 11.

[0049] The user then selects the appropriate outer tube 27 and screws it onto the positioning tube 26 according to the type of fluid to be pumped. The user then drives the servo motor 24, causing its output shaft to rotate the rotating plate 23, aligning the through hole 25 on the rotating plate 23 with the connecting tube 21 to be pumped. After this, the user stops the servo motor 24, fixing the alignment of the through hole 25 with the connecting tube 21. At this point, the connecting tube 21 to be pumped and the outer tube 27 are connected to the positioning tube 26 through the through hole 25, while the other two connecting tubes 21 are sealed by the rotating plate 23. The user can then pump the corresponding fluid into the connecting tube 21 through the outer tube 27. The fluid flows into the cement head body 11 through the corresponding injection connector 14. Furthermore, by rotating the output shaft of the servo motor 24, the through hole 25 can be switched to connect to different connecting tubes 21, thus achieving unified control of fluid flow through the three injection connectors 14 by the installation components.

[0050] In summary, the following beneficial effects can be achieved by running the auxiliary components: Firstly, by using the auxiliary components, a mechanical locking structure that can be vertically inserted into the cement head body 11 is adopted to achieve rapid loading, safe locking and one-button precise release of the rubber stopper 15, which greatly shortens the installation operation time of the rubber stopper 15 and reduces human error.

[0051] Secondly, by using auxiliary components, multiple control valves in existing technologies are integrated into a compact, rotatable structure. By rotating to switch flow channels, flange connection points are reduced, leakage risk is lowered, and pressure resistance is improved.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A cementing head device for oil extraction, comprising a cementing head body (11), an end cap (12) threadedly connected to the top of the cementing head body (11), two stop pins (13) threadedly connected in a vertical linear array on the cementing head body (11), three injection pipes (14) fixedly connected in a vertical linear array on the cementing head body (11), the injection pipes (14) being offset from the stop pins (13), and two rubber plugs (15) being snapped into the cementing head body (11), characterized in that: The cement head body (11) is provided with an auxiliary component, which includes an integrated component and an installation component. The integrated component is used to switch the flow state of the three injection pipes (14), and the installation component is used to realize the rapid loading and precise release of the rubber stopper (15). The integrated component includes three connecting pipes (21), which are fixedly connected to the three injection pipes (14) respectively. The end of the three connecting pipes (21) away from the cement head body (11) is bent upward, and the top of the three connecting pipes (21) is distributed in a triangular shape at equal intervals. The installation component includes four push rods (310) and four suction cups (39). The push rods (310) are made of rubber. The mounting components also include a support rod (31), which is rotatably connected to the outer wall of the cement head body (11). A clamping plate (32) is snapped onto the outer wall of the cement head body (11). The clamping plate (32) and the support rod (31) are pressed together. A bearing plate (33) is fixedly connected to the end of the support rod (31) away from the cement head body (11). The support rod (31) and the bearing plate (33) are arranged perpendicularly. Four servo motors (34) are fixedly connected in a ring array on the bearing plate (33). Each servo motor (34) has a spool (35) fixedly connected to the output shaft end. Each spool (35) has a wire rope (36) fixedly connected to it. Each wire rope (36) has a connecting block (37) fixedly connected to one end away from the spool (35). The four connecting blocks (37) have a support plate (38) fixedly connected to one end away from the wire rope (36). Four suction cups (39) are fixedly connected in a ring to the lower surface of the top of the suction cups (39). Four abutment rods (310) are slidably connected to the four connecting blocks (37). Each of the four abutment rods (310) is fitted with a spring (311). Each of the four abutment rods (310) has a poking rod (312) fixedly connected to one end away from the adjacent connecting block (37). Each of the four abutment rods (310) has a top rod (313) fixedly connected to one end. The two ends of the spring (311) are respectively connected to the adjacent connecting block (37) and the top rod (313). The four guide rods (314) are fixedly connected to each other. Each guide rod (314) is fixedly connected to a stop plate (315) at the ends of the four guide rods (314). Each guide rod (314) is fitted with a second spring (316). The two ends of the second spring (316) are fixedly connected to the adjacent top rod (313) and the stop plate (315) respectively. Each of the four stop plates (315) is evenly connected to multiple balls (317) on the side of the four stop plates (315) that are far apart from each other. An electric push rod (318) is fixedly connected to the top surface of the support plate (38). The electric push rod (318) is divided into a fixed shaft and a telescopic shaft. The telescopic shaft end of the electric push rod (318) faces upward. A pointed cone (319) is fixedly connected to the telescopic shaft end of the electric push rod (318).

2. The cementing head device for oil extraction according to claim 1, characterized in that: The integrated components also include a base plate (22), which is fixedly connected to the top of three connecting pipes (21). A rotating plate (23) is rotatably connected to the top of the base plate (22). A servo motor (24) is fixedly connected to the top of the base plate (22). The servo motor (24) is fixedly connected to the output shaft. The output shaft of the servo motor (24) is fixedly connected to the lower surface of the rotating plate (23). A through hole (25) is provided on the rotating plate (23). The through hole (25) is equal to the inner diameter of the connecting pipe (21). A positioning pipe (26) is fixedly connected to the top surface of the rotating plate (23) at the position corresponding to the through hole (25). An outer pipe (27) is threadedly connected to the top of the positioning pipe (26).

3. A cementing head device for oil extraction according to claim 2, characterized in that: The center positions of the servo motor (24) correspond to those of the base plate (22) and the rotating plate (23). The lower surface of the rotating plate (23) is provided with a groove to accommodate the servo motor (24). The lower surface of the rotating plate (23) is in close contact with the upper surface of the base plate (22).

4. A cementing head device for oil extraction according to claim 1, characterized in that: The spool (35) is rotatably connected to the bearing plate (33), the wire rope (36) is wound on the spool (35), and the wire rope (36) is slidably connected to the bearing plate (33).

5. A cementing head device for oil extraction according to claim 1, characterized in that: The support plate (38) is configured as a basin with four protrusions on the top.

6. A cementing head device for oil extraction according to claim 1, characterized in that: The end of the abutment (310) away from the adjacent connecting block (37) is bent downwards, and the ends of the four abutments (310) that are close to each other are all set as inclined surfaces, and the cone (319) is pressed and engaged with the abutment (310).

7. A cementing head device for oil extraction according to claim 1, characterized in that: The piercing rod (312) is set at an angle. The end of the piercing rod (312) near the adjacent suction cup (39) is set as a beveled tip. The piercing rod (312) is pressed and engaged with the adjacent suction cup (39). The bottom end of the piercing rod (312) is flush with the bottom surface of the support plate (38).

8. A cementing head device for oil extraction according to claim 1, characterized in that: The bottom of the abutment (315) bends toward the support plate (38), and the abutment (315) is made of rubber.

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