A ccus oil well high pressure polished rod sealer

Abstract

The utility model discloses a kind of CCUS oil well high-pressure polished rod sealers, including first sealing body, the first sealing body includes packing ring, first packing is arranged in the packing ring, the packing ring is provided with injection hole, the injection hole is connected injection gun, the injection gun is driven by driving device;The output shaft of the driving device is connected with second gear, the injection gun includes connecting the lead screw of piston, the lead screw is screw-connected in injection gun;The lead screw linearly slidingly connects first gear, the first gear and second gear are axially positioned and engaged, and the first gear is located between injection gun and second gear. The utility model's driving device is connected with lead screw by axial positioning gear set, without affecting the manual operation of lead screw, and high safety.

Description

Technical Field

[0001] This utility model relates to the field of petroleum development technology, specifically a CCUS oil well high-pressure polished rod sealer. Background Technology

[0002] CCUS technology is an indispensable and important technological choice for my country's carbon neutrality goal. Oilfields inject collected carbon dioxide into the oil reservoir to "drive out" crude oil from rock fissures, significantly improving recovery rates. In CCUS-related well operations, the wellhead faces complex conditions such as high pressure, carbon dioxide corrosion, and frequent polished rod movement. Compared to conventional 21 MPa wellhead devices in oilfields, CCUS injection wells and effective wellheads operate at pressures exceeding 35 MPa. The high pressure levels make it difficult for polished rod sealing devices to meet the requirements for long-term stable sealing, corrosion prevention, and handling of emergencies. This leads to problems such as seal failure causing oil and gas leaks and equipment damage, seriously affecting the safe production of oil wells and the smooth implementation of CCUS projects.

[0003] Publication No. CN119221853B discloses an automatic sealing and self-tightening packing system, including a left valve core, a right valve core, a first drive assembly, a sealing packing, a second drive assembly, and a cross-shaped sealing housing. This invention has a reasonable and compact structure. When the guide rod in the through hole is not centered, the right valve core moves to the left, allowing the eccentric guide rod to move along the inner wall of the guide groove into the right sealing groove, thus correcting the eccentricity of the guide rod. Then, the guide part moves to the right and makes sealing contact with the guide groove. Finally, the outer side of the guide rod makes sealing contact with the inner wall of the sealing hole, thereby closing the through hole.

[0004] The existing technology's motor occupies the original manual control position, making manual operation impossible. In the event of motor failure, the motor must be disassembled before it can be used, which is not conducive to dealing with emergencies.

[0005] Announcement No. CN214145437U discloses an intelligent wellhead sealing device. The packing chamber contains sealing packing, and the upper part of the sealing packing is equipped with a blowout preventer cap. A blowout preventer ball outer sleeve is connected to the side wall of the blowout preventer cap, and a blowout preventer ball is installed inside the blowout preventer ball outer sleeve. The packing chamber is equipped with a packing chamber outer sleeve, and a feeding device is connected to the packing chamber outer sleeve. The feeding device includes a storage box and a worm gear mechanism. The storage box contains packing connected to the sealing packing, and the worm in the worm gear mechanism is connected to a feeding motor. The worm gear is connected to the packing chamber outer sleeve.

[0006] This existing technology is used for adding strip packings, but cannot be used for adding particulate packings.

[0007] Announcement No. CN105156059B discloses an automatic packing tightening device for pumping units with remote monitoring function, comprising a polished rod, an upper pressure cap, a screw-in nut, packing, a driven gear, a base plate, a housing, a force sensor, a motor, a torque converter, a remote monitoring and control terminal, a mobile communication module, a network communication module, and a drive gear. Two screw-in nuts are provided, respectively located on both sides of the polished rod; the upper pressure cap and packing are both located below the screw-in nuts; the motor is connected to the torque converter; the force sensor is located at the journal of the drive gear, and its output end is connected to the remote monitoring and control terminal; the output end of the remote monitoring and control terminal is connected to the motor; the mobile communication module and the network communication module are respectively connected to the remote monitoring and control terminal.

[0008] The existing technology's motor occupies the original manual control position, making manual operation impossible. In the event of motor failure, the motor must be disassembled before it can be used, which is not conducive to dealing with emergencies.

[0009] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0010] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model provides a CCUS oil well high-pressure polished rod sealer.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A CCUS high-pressure polished rod seal for oil wells includes a first sealing body, which includes a packing ring. A first packing material is disposed within the packing ring. The packing ring has an injection hole connected to an injection gun, which is driven by a drive device. The output shaft of the drive device is connected to a second gear. The injection gun includes a lead screw connected to a piston, which is threaded internally within the injection gun. The lead screw is linearly and slidably connected to a first gear. The first gear and the second gear are axially positioned and meshed, with the first gear located between the injection gun and the second gear.

[0013] Furthermore, the first gear and the second gear are bevel gears or end gear discs, the first gear and the second gear mesh, and the tooth surface of the first gear faces away from the injection gun;

[0014] Specifically, the lead screw has a hand-rotating part at its end outside the injection cylinder; the second gear has more teeth than the first gear.

[0015] Furthermore, the first filler is a sealing particle, which includes regular particles and irregular particles. The irregular particles include rope particles, which form a long axis and a short axis through knots.

[0016] Furthermore, the injection gun includes an injection cylinder;

[0017] Specifically, one port of the injection cylinder is connected to an injection gun connector, the injection gun connector is connected to a control valve, and the control valve is connected to an injection port;

[0018] Specifically, a piston is slidably disposed inside the injection cylinder;

[0019] Specifically, the port of the injection cylinder furthest from the injection gun connector is connected to the injection cylinder cap.

[0020] Specifically, the injection cylinder gland is internally threaded with a lead screw, the lead screw is connected to a piston, and the injection cylinder has a first packing material between the piston and the packing ring;

[0021] Specifically, the first gear is rotatably engaged with the injection cylinder cap, and the injection cylinder cap and the second gear together axially position the first gear.

[0022] Furthermore, the first sealing body includes a blowout preventer, the inner wall of which is provided with a concave ring, and a blowout preventer ball is placed inside the concave ring;

[0023] Specifically, a packing ring is provided on the outer edge of the upper end of the blowout preventer, a first packing is provided between the packing ring and the upper end face of the blowout preventer, and a first pressure cap is connected to the inner wall of the upper end of the packing ring, the first pressure cap pressing the first packing.

[0024] Furthermore, the lower end of the first sealing body is connected to the second sealing body;

[0025] Specifically, the second sealing body includes a second packing seat, the lower end of the inner wall of the second packing seat is connected to a packing sleeve, and the upper end of the packing sleeve is where a second packing is placed;

[0026] Specifically, the second packing seat has a second pressure cap that slides on the upper inner wall, the blowout preventer has a connecting ring on the lower outer edge, the inner wall of the connecting ring is connected to the upper outer wall of the second packing seat, and the blowout preventer presses the second pressure cap.

[0027] Furthermore, the lower end of the second sealing body is connected to the third sealing body;

[0028] Specifically, the third sealing body includes a third packing seat, the inner wall of which is a large-diameter straight wall, a conical wall, and a small-diameter straight wall;

[0029] Specifically, a third filler is placed on the conical wall;

[0030] Specifically, the large-diameter straight wall sliding fits the third pressure cap, the upper outer wall of the third packing seat is connected to the adjustment base, and the adjustment base makes the third pressure cap contact the third packing.

[0031] Specifically, the lower outer wall of the second packing seat is a ball head, the upper end of the inner wall of the adjustment base is provided with a spherical surface, the ball head and the spherical surface are sealed together, the outer wall of the second packing seat is fitted with an adjustment pressure cap, the lower inner wall of the adjustment pressure cap is threaded to the upper outer wall of the adjustment base, the upper inner wall of the adjustment pressure cap is provided with a pressure ring, the lower end of the inner wall of the pressure ring is provided with an arc-shaped pressure surface, and by tightening the adjustment pressure cap, the arc-shaped pressure surface presses the ball head tightly onto the spherical surface.

[0032] Furthermore, the outer wall of the connecting ring, the outer wall of the adjusting base, and the outer wall of the adjusting cap are all provided with symmetrical grips.

[0033] Furthermore, a spring seat is provided on the inner wall of the injection cylinder, and a spring is provided between the piston and the spring seat.

[0034] Furthermore, the drive device includes a stepper motor, which is connected to a drive board, which is connected to the well site RTU, and the drive board of the stepper motor is connected to a solar power supply system.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. The drive device of this utility model is connected to the lead screw through an axial positioning gear set, which does not affect the manual operation of the lead screw and has high safety.

[0037] 2. This utility model has high safety and environmental protection performance, and has functions such as deviation adjustment and blowout prevention, which reduces wellhead leakage caused by uneven wear. The design of the blowout prevention part can prevent blowout accidents when the rod breaks.

[0038] 3. This utility model improves production efficiency; remote packing fastening is achieved through the well site RTU, reducing labor intensity; and electricity costs are reduced by utilizing a solar power supply system. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of a CCUS oil well high-pressure polished rod seal according to this utility model.

[0040] Figure 2 This is a schematic diagram of the injection gun in this utility model.

[0041] Figure 3 This is a schematic diagram of the solar power supply system in this utility model.

[0042] Figure 4 This is a schematic diagram of the rope-shaped packing structure of the first packing material in this utility model.

[0043] Figure 5 This is a schematic diagram of the circular particle packing structure of the first packing material in this utility model.

[0044] Figure 6 This is a schematic diagram of the elongated granular packing structure of the first packing material in this utility model.

[0045] Figure 7 This is a schematic diagram of the top cup-shaped root structure of the second packing in this utility model.

[0046] Figure 8 This is a schematic diagram of the cup packing structure of the second packing material in this utility model.

[0047] Figure 9 This is a schematic diagram of the structure of the third packing material in this utility model.

[0048] In the diagram: 1-Abrasion-resistant bushing; 2-Third packing seat; 3-Third packing; 4-Third gland; 5-Alignment base; 6-First sealing ring; 7-Packing sleeve; 8-Second sealing ring; 9-Third sealing ring; 10-Alignment cap; 11-Second packing; 12-Second packing seat; 13-Second gland; 14-Connecting ring; 15-Blowout preventer ball; 16-Blowout preventer body; 17-First packing; 18-Packing ring; 19-First gland; 20-Control valve; 21-Injection gun connector; 22-Injection cylinder; 23-Sealing ring; 24-Piston; 25-Spring; 26-Lead screw; 27-Injection cylinder gland; 28-Handle; 29-First gear; 30-Second gear; 31-Stepper motor; 32-Solar power supply system; M1-Stepper motor power supply. 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] Example 1:

[0051] Please see Figures 1 to 9 The present invention provides a CCUS oil well high-pressure polished rod sealer, comprising a first sealing body, a second sealing body, and a third sealing body connected in sequence.

[0052] Furthermore, the first sealing body includes a blowout preventer 16, with a concave ring on the inner wall of the blowout preventer 16, and a blowout preventer ball 15 placed inside the concave ring. A packing ring 18 is provided on the outer edge of the upper end of the blowout preventer 16, and a first packing 17 is provided in an annular space between the packing ring 18 and the upper end face of the blowout preventer 16. A first pressure cap 19 is threaded to the inner wall of the upper end of the packing ring 18, and the first pressure cap 19 presses the first packing 17. The packing ring 18 is provided with an injection hole, and a connector is welded to the injection hole. The connector is threaded to a control valve 20, and the end of the control valve 20 away from the packing ring 18 is threaded to an injection gun. The injection gun is driven by a driving device to realize remote control of the packing compression.

[0053] Specifically, the inner diameter of the upper end of the blowout preventer 16 is smaller than the outer diameter of the blowout preventer ball, enabling emergency well shut-off when the polished rod breaks off.

[0054] Specifically, the first filler 17 is an aramid filler sealing particle. The aramid particle filler uses aramid fiber as the reinforcing material. The aramid particle filler includes irregular particles and regular particles. The irregular particles include large and small ropes, and the regular particles include large, medium and small round particles and long strip particles. Combined with lubricants such as grease, graphite powder, and polytetrafluoroethylene emulsion, it forms a plastic sealing filler, which can achieve superimposed and supplementary sealing. It has good friction reduction and corrosion resistance properties, and is easy to add.

[0055] The cord is made of aramid rope with knots forming a long axis and a short axis. The long axis of the large cord is 6-8mm and the short axis is 2-4mm, while the long axis of the small cord is 3-6mm and the short axis is 1-3mm.

[0056] Specifically, the control valve 20 is a shut-off valve.

[0057] Specifically, the injection gun includes an injection cylinder 22, one port of which is threadedly connected to an injection gun connector 21. The injection gun connector 21 is threadedly connected to a control valve 20. A piston 24 is rotatably and slidably disposed inside the injection cylinder 22. The port of the injection cylinder 22 away from the injection gun connector 21 is threadedly connected to an injection cylinder cap 27. A lead screw 26 is threadedly connected inside the injection cylinder cap 27. The lead screw 26 and the piston 24 are connected by a key interference fit. A first packing 17 is disposed between the piston 24 and the packing ring 18 in the injection cylinder 22.

[0058] Specifically, the driving device includes a stepper motor 31. The portion of the lead screw 26 outside the injection cylinder 22 is linearly slidably connected to the first gear 29 via a circumferential rotation limiting mechanism. The output shaft of the stepper motor 31 is connected to the second gear 30 via an axial positioning plate. The first gear 29 and the second gear 30 are bevel gears or end gears. The tooth surface of the first gear 29 faces away from the injection gun, and the tooth surface of the second gear 30 faces the injection gun. The first gear 29 and the second gear 30 mesh. The first gear 29 rotates with the injection cylinder cover 27. The injection cylinder cover 27 and the second gear 30 together axially position the first gear 29. The stepper motor 31 drives the second gear 30 to rotate, and the second gear 30 drives the first gear 29 to rotate. The first gear 29 causes the lead screw 26 to rotate, and the lead screw 26 moves linearly along the injection cylinder cover 27, thereby causing the piston to press the first filler 17. The stepper motor 31 is connected to a drive plate, and the drive plate is connected to a well site RTU, enabling remote control of the stepper motor 31 via the well site RTU.

[0059] Specifically, the circumferential rotation limiting mechanism includes a protrusion and a long groove. The protrusion is provided on the inner wall of the first gear 29, and the long groove is provided on the outer wall of the lead screw 26. The protrusion and the long groove cooperate to achieve circumferential rotation limiting and linear sliding cooperation.

[0060] Specifically, the first gear 29 is rotatably engaged with the injection cylinder cap 27 via a thrust bearing.

[0061] Furthermore, a handle 28 is provided at the end of the lead screw 26 outside the injection cylinder 22. The second gear 30 has more teeth than the first gear 29. Rotating the handle 28 allows the first gear 29 to be rotated due to the effort-saving transmission between the first gear 29 and the second gear 30, thus facilitating manual clamping of the first filler 17. The stepper motor 31 operates in a low-speed, high-torque, and labor-intensive transmission mode.

[0062] Furthermore, the second sealing body includes a second packing seat 12, the lower end of the inner wall of the second packing seat 12 is threadedly connected to a packing sleeve 7, the upper end of the packing sleeve 7 is provided with a second packing 11, the upper inner wall of the second packing seat 12 is slidably fitted with a second pressure cap 13, the lower outer edge of the blowout preventer 16 is provided with a connecting ring 14, the inner wall of the connecting ring 14 is threadedly connected to the upper outer wall of the second packing seat 12, and the blowout preventer 16 presses against the second pressure cap 13.

[0063] Specifically, the second packing 11 is a cup packing with the V-shaped opening facing downwards. The top of the uppermost cup packing is a flat end without a cone angle. The cup packing is made of hydrogenated nitrile material, which is resistant to carbon dioxide gas explosion and high and low temperatures, ensuring the reliability of dynamic sealing.

[0064] Specifically, the packing ring 18, the blowout preventer 16, and the connecting ring 14 are integrally cast.

[0065] Further, the third sealing body includes a third packing seat 2, the inner wall of the third packing seat 2 being a large-diameter straight wall, a conical wall, and a small-diameter straight wall, the conical wall holding the third packing 3, the large-diameter straight wall slidingly fitting the third pressure cap 4, the upper outer wall of the third packing seat 2 being threadedly connected to an adjustment base 5, the adjustment base 5 causing the third pressure cap 4 to contact the third packing 3, the lower outer wall of the second packing seat 12 being a ball head, the upper end of the inner wall of the adjustment base 5 being provided with a spherical surface, the ball head and the spherical surface sealingly fitting, the outer wall of the second packing seat 12 being fitted with an adjustment pressure cap 10, the lower inner wall of the adjustment pressure cap 10 being threadedly connected to the upper outer wall of the adjustment base 5, the upper inner wall of the adjustment pressure cap 10 being provided with a pressure ring, the lower end of the inner wall of the pressure ring being provided with an arc-shaped pressure surface, by tightening the adjustment pressure cap 10 causing the arc-shaped pressure surface to press the ball head onto the spherical surface; the lower outer wall of the third packing seat 2 being provided with a wellhead thread.

[0066] Specifically, the third packing 3 is a conical packing made of hydrogenated nitrile material. It is in a relaxed state during normal production. When an emergency well shut-in is required, the offset pressure cap 10 is tightened to achieve an emergency well shut-in seal.

[0067] Specifically, two first sealing rings 6 are provided between the third packing seat 2 and the offset base 5 to enhance the seal.

[0068] Specifically, the spherical surface is provided with a second sealing ring 8 and a third sealing ring 9 to achieve a seal between the spherical surface and the ball head.

[0069] Preferably, the first sealing ring 6, the second sealing ring 8, and the third sealing ring 9 are O-rings.

[0070] Specifically, the lower ends of the inner walls of the second and third pressure caps and the third packing seat are all provided with anti-wear bushings 1 through downward-facing steps. The anti-wear bushings 1 are made of copper and are used to slide with the guide rod to avoid wear on the guide rod.

[0071] This utility model innovatively designs a three-stage sealing blowout prevention structure, employing a three-stage sealing method consisting of a conical shut-in seal, a cup packing seal, and a granular packing seal, ensuring normal operation under high pressure, low temperature, and carbon dioxide corrosion conditions; the conical shut-in seal can block bottom hole pressure, controlling blowouts safely and reliably; in the event of unexpected events such as polished rod breakage, the blowout preventer ball will block the passage to prevent blowouts.

[0072] It should be noted that the stepper motor 31, drive board, and well site RTU are existing technologies, and those skilled in the art are clear about their structure and principles, so they will not be described in detail here.

[0073] Example 2:

[0074] Based on Embodiment 1, in this embodiment, the outer walls of the connecting ring 14, the outer walls of the adjusting base 5, and the outer walls of the adjusting cap 10 are all provided with symmetrical handles to facilitate manual rotation for loading and unloading.

[0075] In this embodiment, a spring seat is provided on the inner wall of the injection cylinder 22, and a spring 25 is provided between the piston 25 and the spring seat. The spring is used for energy storage.

[0076] The stepper motor 31 operates in a low-speed, high-torque, force-intensive transmission mode, and the spring 25 in embodiment 2 reduces the required force.

[0077] In this embodiment, the drive board of the stepper motor 31 is connected to the solar power supply system 32 to achieve green electricity supply and reduce electricity costs.

[0078] It should be noted that the solar power supply system is existing technology, and those skilled in the art are clear about its structure and principle, so it will not be described in detail here.

[0079] Example 3:

[0080] Based on Example 2, this example provides a method for using a CCUS high-pressure polished rod sealer in oil wells, including the following steps:

[0081] S1. When installing, select one set of high-pressure smooth rod seals that match the diameter of the smooth rod, and one set of operating tools.

[0082] S2. Stop the suspension device near the bottom dead center, unload the suspension point load, close the back pressure gate, open the sampling gate to release air, and remove the original smooth rod seal.

[0083] S3. Insert the third sealing body component into the polished rod from the top of the polished rod in sequence, and use the threads to firmly connect the third packing seat 2 to the flange on the wellhead. Add the third packing 3 into the third packing seat 2, tighten the adjustment base 5, so that the third pressure cover 4 and the third packing 3 are in slight contact. The third packing 3 is in a relaxed state and does not participate in the dynamic seal.

[0084] S4. Insert the second sealing body component into the light rod from the top of the light rod. The ball head can be automatically adjusted. After adjustment, tighten the adjustment cap 10. Add the second packing into the second packing seat 12 and tighten the connecting ring 14 to the appropriate position.

[0085] S5. Insert the first sealing body component into the light rod from the top end of the light rod. Add the first packing 17 into the packing ring 18. Add the material retaining packing at the top to prevent the first packing 17 from being carried out by the light rod. Put on the first pressure cap 19. Add the first packing 17 into the injection gun. When adding, pull the handle 28 to make the piston 24 make room. The spring 25 plays the role of storing energy. The injection gun is sealed and connected to the injection hole. Install the second gear 32 on the output shaft of the stepper motor 31. Adjust the position of the stepper motor 31 by adjusting the motor frame so that the first gear 29 and the second gear 30 mesh. After the first gear 29 and the second gear 30 mesh, if it is necessary to adjust the deviation, the second gear 30 must be removed first. After adjustment, the second gear 30 is installed and the position of the stepper motor 31 is readjusted.

[0086] S6. Attach the suspension load and run the well for about 30 minutes. Depending on the actual condition of the oil well, open the control valve 20 and rotate the injection gun handle 28 until the polished rod no longer heats up and the wellhead no longer leaks. At this time, the third packing 3 is in a relaxed state and does not participate in the dynamic seal. The second packing 11 can play a certain sealing role, but it is not necessary to tighten the second packing 11 again.

[0087] S7. When the first packing 17 needs to be added, the manual addition method is to rotate the handle 28, the lead screw 26 rotates on the thread in the first gear 29, the spring 25 continuously pushes the piston 24, the piston 24 pushes the first packing 17, and the first packing 17 is squeezed into the packing ring 18 through the control valve 20 to achieve non-stop well filling and sealing.

[0088] S8. When the first packing 17 needs to be added, the remote addition method is to control the stepper motor 31 through the well site RTU to rotate the second gear 30, drive the first gear 29, so that the lead screw 26 moves linearly, and the piston 25 squeezes the first packing 17 into the packing cavity 18 to achieve remote compaction of the packing.

[0089] S9. During the up-and-down movement of the polished rod, factors such as the installation of oil well equipment and formation movement may cause the polished rod and the seal to become eccentric. Utilizing the universal rotation characteristics of the ball head, when the polished rod moves eccentrically, the ball head can flexibly change its angle within a certain range, allowing the seal to adapt to the offset position of the polished rod and always maintain close contact with the polished rod, effectively sealing the wellhead and preventing crude oil leakage.

[0090] S10. In the event of an accident such as the broken rod, the blowout preventer ball 15 will quickly move to the upper inner hole of the blowout preventer body 16 under the action of pressure difference, block the channel, prevent the fluid (crude oil, natural gas, etc.) in the well from being ejected out of the wellhead in large quantities, and avoid a blowout accident.

[0091] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0092] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0093] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0094] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A CCUS oil well high-pressure polished rod seal, comprising a first sealing body, characterized in that, The first sealing body includes a packing ring, a first packing material is disposed inside the packing ring, the packing ring is provided with an injection hole, the injection hole is connected to an injection gun, and the injection gun is driven by a driving device; The output shaft of the drive device is connected to a second gear, and the injection gun includes a lead screw connected to a piston, the lead screw being threaded inside the injection gun; The lead screw is linearly slidably connected to the first gear, and the first gear and the second gear are axially positioned and meshed. The first gear is located between the injection gun and the second gear.

2. The CCUS oil well high-pressure polished rod seal according to claim 1, characterized in that, The first gear and the second gear are bevel gears or end gears. The first gear and the second gear mesh, and the tooth surface of the first gear faces away from the injection gun. The lead screw has a hand-rotating part at its end outside the injection cylinder; The second gear has more teeth than the first gear.

3. A CCUS oil well high-pressure polished rod seal according to claim 1, characterized in that, The first filler is a sealing particle, which includes regular particles and irregular particles. The irregular particles include rope particles, which form a long axis and a short axis through knots.

4. A CCUS oil well high-pressure polished rod seal according to claim 1, characterized in that, The injection gun includes an injection cylinder; One port of the injection cylinder is connected to an injection gun connector, and the injection gun connector is connected to a control valve, which is connected to an injection port. A piston is slidably disposed inside the injection cylinder; The port of the injection cylinder furthest from the injection gun connector is connected to the injection cylinder cap. The injection cylinder gland is internally threaded with a lead screw, which is connected to a piston. A first packing is provided between the piston and the packing ring in the injection cylinder. The first gear rotates in conjunction with the injection cylinder cap, and the injection cylinder cap and the second gear together axially position the first gear.

5. A CCUS oil well high-pressure polished rod seal according to claim 2, characterized in that, The first sealing body includes a blowout preventer, the inner wall of which is provided with a concave ring, and a blowout preventer ball is placed inside the concave ring; A packing ring is provided on the outer edge of the upper end of the blowout preventer, and a first packing is provided between the packing ring and the upper end face of the blowout preventer. A first pressure cap is connected to the inner wall of the upper end of the packing ring, and the first pressure cap presses the first packing.

6. A CCUS oil well high-pressure polished rod seal according to claim 5, characterized in that, The lower end of the first sealing body is connected to the second sealing body; The second sealing body includes a second packing seat, the lower end of the inner wall of the second packing seat is connected to a packing sleeve, and the upper end of the packing sleeve is where a second packing is placed; The second packing seat has a second pressure cap that slides on the upper inner wall. A connecting ring is provided on the lower outer edge of the blowout preventer. The inner wall of the connecting ring is connected to the upper outer wall of the second packing seat. The blowout preventer presses the second pressure cap tightly.

7. A CCUS oil well high-pressure polished rod seal according to claim 6, characterized in that, The lower end of the second sealing body is connected to the third sealing body; The third sealing body includes a third packing seat, the inner wall of which is a large-diameter straight wall, a conical wall, and a small-diameter straight wall; A third filler is placed on the conical wall; The large-diameter straight wall sliding fit third pressure cap, the upper outer wall of the third packing seat is connected to the adjustment base, the adjustment base makes the third pressure cap contact the third packing; The lower outer wall of the second packing seat is a ball head, and the upper end of the inner wall of the adjustment base is provided with a spherical surface. The ball head and the spherical surface are sealed together. An adjustment pressure cap is sleeved on the outer wall of the second packing seat. The lower inner wall of the adjustment pressure cap is threaded to the upper outer wall of the adjustment base. A pressure ring is provided on the upper inner wall of the adjustment pressure cap. An arc-shaped pressure surface is provided on the lower end of the inner wall of the pressure ring. By tightening the adjustment pressure cap, the arc-shaped pressure surface presses the ball head tightly onto the spherical surface.

8. A CCUS oil well high-pressure polished rod seal according to claim 7, characterized in that, Symmetrical grips are provided on the outer walls of the connecting ring, the outer walls of the adjustment base, and the outer walls of the adjustment cap.

9. A CCUS oil well high-pressure polished rod seal according to claim 4, characterized in that, A spring seat is provided on the inner wall of the injection cylinder, and a spring is provided between the piston and the spring seat.

10. A CCUS oil well high-pressure polished rod seal according to claim 1, characterized in that, The drive device includes a stepper motor, which is connected to a drive board, which is connected to the well site RTU, and the drive board of the stepper motor is connected to a solar power supply system.

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