A device for regulating the opening of a well choke

Abstract

The utility model discloses a device for self -fountain well oil nozzle opening degree regulation, including the plug, the plug inside linear movement connection adjusting rod, adjusting rod includes adjusting part, sealing part, screw portion, drive part, adjusting part passes out the plug, sealing part and plug inner wall seal, screw portion and plug inner wall screw connection, plug sets up corresponding screw locking mechanism with screw portion, and the adjusting rod is locked through screw locking mechanism. The utility model discloses through the rotation adjusting rod changes the size of oil nozzle aperture, and after adjusting to the oil nozzle aperture of need, the use of screw locking mechanism can fix the position of adjusting rod from inside, prevents its rotation and displacement from occurring, thereby ensuring that the aperture after adjusting will not change.

Description

Technical Field

[0001] This utility model relates to the field of petroleum development technology, specifically a device for adjusting the opening degree of the nozzle in a flowing well. Background Technology

[0002] The nozzle in a flowing well is a key component of a flowing oil production system. It controls production output by adjusting the nozzle orifice size to regulate the flow rate of crude oil from the bottom of the well to the wellhead, maintaining well production within a reasonable range. It also regulates pressure, adjusting the well's production pressure to prevent excessively high or low pressure from affecting production efficiency and well lifespan. Furthermore, it stabilizes production, ensuring the stability of the well's production process, reducing production fluctuations, and making oil production operations more orderly.

[0003] Existing adjustable nozzle devices require frequent cleaning and replacement of nozzles during operation, depending on changes in production output and pressure, resulting in high labor intensity. Each nozzle replacement requires shutting down the well, reversing the flow, and venting, generating oil pollution and affecting production efficiency. When the nozzle is clogged, high-speed spraying of oil or liquid can occur during disassembly, posing a safety hazard.

[0004] Announcement No. CN222376442U discloses a rotary multi-bore adjustable nozzle device, which includes a main valve body, a valve cover, a valve stem, a valve core, and a stem sealing assembly. The main valve body has a valve chamber with an opening to the right on the right side, an inlet hole that can communicate with the valve chamber on the left side of the main valve body, and an outlet hole that can communicate with the valve chamber on the upper side of the main valve body. The valve core is provided inside the valve chamber. The valve core with an inlet chamber opening to the left on the left side corresponding to the position of the inlet hole has an inlet chamber opening to the left. The valve core with at least two nozzle mounting holes with their inner ends communicating with the inlet chamber are provided circumferentially on the outer side of the middle part of the valve core corresponding to the position of the outlet hole.

[0005] The existing technology has a relatively complex overall structure, making it difficult to implement, and it cannot steplessly adjust the nozzle orifice diameter without stopping the well.

[0006] Announcement No. CN204082089U discloses an adjustable throttling device for self-flowing oil wells, including an oil nozzle, a main body, and a plug. The male thread of the oil nozzle is connected to the female thread on the left end of the main body, and the male thread of the plug is connected to the female thread on the right end of the main body. The main body has an outlet, and the oil nozzle has a throttling orifice. The external thread of the adjusting rod engages with the internal thread of the plug. The adjusting rod has a throttling rod that is inserted into the throttling orifice of the oil nozzle, forming an annular throttling channel between the throttling rod and the throttling orifice. The plug and the adjusting rod are sealed by a sealing ring. Rotating the adjusting rod can adjust the length of the throttling rod extending into the throttling orifice, thereby changing the length of the annular throttling channel without disassembling the plug and the oil nozzle.

[0007] The existing technology has a short stepless adjustment stroke, and the adjustment rod of the existing technology may loosen due to vibration during use, which will cause the oil nozzle diameter to change.

[0008] 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

[0009] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention provides a device for adjusting the nozzle opening of a self-flowing well.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A device for adjusting the opening of a self-flowing well nozzle includes a plug, an adjusting rod linearly connected inside the plug, the adjusting rod including an adjusting part, a sealing part, a threaded part, and a driving part; the adjusting part extends out of the plug, the sealing part seals with the inner wall of the plug, and the threaded part is threadedly connected to the inner wall of the plug; the plug is provided with a threaded locking mechanism corresponding to the threaded part, and the adjusting rod is locked by the threaded locking mechanism.

[0012] In one embodiment of this utility model, the threaded locking mechanism includes a positioning pin;

[0013] Specifically, the plug is provided with a radial locking hole communicating with the interior, the locking hole corresponds to the threaded part, and the positioning pin is provided in the locking hole;

[0014] Specifically, a limiting ring is provided on the outer wall of the positioning pin, the limiting ring is slidably engaged with the locking hole, and the positioning pin passes through the locking hole;

[0015] Specifically, a spring seat ring is provided at the end of the locking hole away from the limiting ring, and a spring is sleeved on the positioning pin. One end of the spring contacts the limiting ring and the other end contacts the spring seat ring. The spring is in a compressed state.

[0016] Specifically, the end of the positioning pin away from the threaded portion is connected to the pull plate.

[0017] In one embodiment of the present invention, the threaded locking mechanism includes a positioning bolt, the plug is provided with a radial locking hole communicating with the interior, the locking hole corresponds to the threaded portion, and the positioning bolt is threadedly connected to the locking hole.

[0018] In one embodiment of this utility model, the adjusting part has a tapered structure and tapers towards the end away from the plug;

[0019] Specifically, a cylindrical head is provided at the center of the end of the adjusting part away from the plug, and the outer diameter of the cylindrical head is smaller than the minimum conical diameter of the adjusting part;

[0020] Specifically, the plug is provided with a tapered hole that cooperates with the adjustment part.

[0021] In one embodiment of this utility model, the adjusting part is a conical head cylindrical structure, and the adjusting part is connected to the optical axis of the sealing part through a threaded post.

[0022] Furthermore, the sealing part is a sealing ring, and the adjusting part and the threaded part are connected by an optical axis, on which the sealing ring is embedded.

[0023] Furthermore, the outer diameter of the optical axis is smaller than the outer diameter of the threaded part, and the outer diameter of the optical axis is equal to the maximum diameter of the tapered part of the adjusting part, so that there is an annular space between the sealing part and the threaded part, and grease is placed in this annular space.

[0024] Furthermore, the threaded portion engages with the inner wall of the plug via a self-locking thread.

[0025] Furthermore, the drive unit extends out of the plug, and a rotating handle is provided outside the plug on the drive unit. A baffle is provided at the end of the rotating handle away from the plug.

[0026] Furthermore, a connecting cap is provided on the outer wall of the end of the plug near the adjustment part;

[0027] Specifically, a connecting adjustment bolt is threaded through the side wall of the connecting cover, and the adjusting bolt is used to lock the connecting cover;

[0028] Specifically, a scale is provided on the end face of the connecting cover, the baffle is a circular plate with an outer diameter smaller than the scale, and a marking is provided on the end face of the baffle away from the scale.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. This utility model changes the size of the nozzle orifice by rotating the adjusting rod. After adjusting to the required nozzle orifice diameter, the use of the threaded locking mechanism can fix the position of the adjusting rod from the inside, preventing it from rotating and shifting, thereby ensuring that the adjusted orifice diameter will not change.

[0031] 2. This utility model has a simple and reliable structure, and is easy to disassemble and install. It can be installed on the oil nozzle sleeve at the wellhead of an oil well by a single person using tools such as pipe wrenches, adjustable wrenches, and oil nozzle wrenches.

[0032] 3. This utility model improves the production rate of oil wells. Compared with the traditional method of changing nozzles, this device eliminates the need for well shutdown, process reversal, and venting on-site. Only one person needs to rotate the nozzle adjusting rod according to the scale to achieve the required nozzle orifice diameter. Operation is convenient and quick, reducing working time from 10 minutes to approximately 40 seconds, significantly improving work efficiency and resulting in high economic benefits. Venting without shutting down the well produces no oil pollution, eliminating environmental hazards. Furthermore, the absence of nozzle disassembly eliminates the safety risks associated with nozzle removal, enhancing safety performance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the external structure of the device according to Embodiment 1 of this utility model.

[0034] Figure 2 This is a schematic diagram of the internal structure of the device according to Embodiment 1 of this utility model.

[0035] Figure 3 This is a schematic diagram of the adjusting rod structure of Embodiment 1 of this utility model.

[0036] Figure 4 This is a schematic diagram of the external structure of the device according to Embodiment 3 of this utility model.

[0037] Figure 5 This is a schematic diagram of the internal structure of the device according to Embodiment 3 of this utility model.

[0038] Figure 6 This is a schematic diagram of the adjusting rod structure in Embodiment 3 of this utility model.

[0039] Figure 7 This is a schematic diagram of the high-pressure sealing plug structure of Embodiment 3 of this utility model.

[0040] Figure 8 This is a schematic diagram of the dial structure of Embodiment 3 of this utility model.

[0041] In the diagram: 1. High-pressure sealing plug; 2. Adjusting rod; 3. Adjusting bolt; 4. Connecting thread; 5. Connecting cover; 6. Dial; 7. Drive unit; 71. Rotating handle; 72. Baffle; 8. Sealing unit; 9. Locking hole; 10. Limiting ring; 11. Positioning pin; 12. Spring; 13. Pull plate; 14. Adjusting unit; 15. Columnar head; 16. Threaded part; 17. Positioning bolt; 18. Adjusting hole. Detailed Implementation

[0042] 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.

[0043] Example 1:

[0044] Please see Figures 1 to 3 This embodiment provides a device for adjusting the opening of a self-flowing well nozzle, including a high-pressure sealing plug 1. An adjusting rod 2 is linearly connected within the high-pressure sealing plug 1. The adjusting rod 2 includes an adjusting part 14, a sealing part 8, a threaded part 16, and a driving part 7. The adjusting part 14 extends out of the high-pressure sealing plug 1. The sealing part 8 seals against the inner wall of the high-pressure sealing plug 1. The threaded part 16 is threadedly connected to the inner wall of the high-pressure sealing plug 1, enabling linear movement. The driving part 7 is used to rotate the adjusting rod 2 with a tool. The high-pressure sealing plug 1 is equipped with a threaded locking mechanism corresponding to the threaded part 16, which locks the adjusting rod 2. In use, the adjusting part 14 cooperates with the nozzle, and the distance between the adjusting part 14 and the nozzle is adjusted by rotating the driving part 7, thereby adjusting the flow area of ​​the nozzle.

[0045] The high-pressure sealing plug 1 is the basic structure for connecting the oil well pipeline and constructing the internal structure of the entire device. It is the main load-bearing structure of the device. The high-pressure sealing plug 1 has a mating thread 4 at one end near the adjustment part 14, which is used to connect the oil nozzle to the wellhead oil nozzle sleeve.

[0046] Specifically, the regulating part 14 has a conical structure that tapers towards the end away from the high-pressure sealing plug 1. The conical structure, when combined with the oil nozzle, enables stepless flow regulation. A cylindrical head 15 is threadedly installed at the center of the end of the regulating part 14 away from the high-pressure sealing plug 1. The outer diameter of the cylindrical head 15 is smaller than the minimum conical diameter of the regulating part 14. A flow-through annulus is formed between the cylindrical head 15 and the inner wall of the oil nozzle. The cylindrical head 15 is used to improve fluid flow and prevent impurities in the oil from forming solid deposits at the center of the end of the regulating part 14.

[0047] Specifically, the high-pressure sealing plug 1 is provided with a tapered hole that cooperates with the adjustment part 14, and the tapered hole is used to position the adjustment rod 2 at its movement limits.

[0048] Specifically, the sealing part 8 is a sealing ring, and the adjusting part 14 and the threaded part 16 are connected by an optical axis, on which two sealing rings are embedded for sealing.

[0049] Preferably, the outer diameter of the optical axis is smaller than the outer diameter of the threaded portion 16, and the outer diameter of the optical axis is equal to the maximum diameter of the tapered portion 14, so that there is an annular space between the sealing portion 8 and the threaded portion 16. Lubricating grease is placed in this annular space, which can both lubricate the threads and improve the sealing effect.

[0050] Preferably, the sealing ring is a vulcanized sealing ring.

[0051] Specifically, the threaded portion 16 is engaged with the inner wall of the high-pressure sealing plug 1 via a self-locking thread.

[0052] Preferably, the self-locking thread is a trapezoidal thread.

[0053] Specifically, the drive unit 7 extends out of the high-pressure sealing plug 1, and the drive unit 7 is provided with a rotating handle 71 outside the high-pressure sealing plug 1. The rotating handle 71 is a connecting handle, and a baffle 72 is provided at the end of the rotating handle 71 away from the high-pressure sealing plug 1 to facilitate wrench positioning.

[0054] Furthermore, the threaded locking mechanism includes a positioning pin 11. The high-pressure sealing plug 1 has a radial locking hole 9 communicating with the interior. The locking hole 9 corresponds to the threaded portion 16. The positioning pin 11 is disposed within the locking hole 9. A limiting ring 10 is provided on the outer wall of the positioning pin 11. The limiting ring 10 slides in conjunction with the locking hole 9. The positioning pin 11 protrudes from the locking hole 9. A spring seat ring is provided at one end of the locking hole 9 away from the limiting ring 10. A spring 12 is sleeved on the positioning pin 11. One end of the spring 12 contacts the limiting ring 10, and the other end contacts the spring seat ring. When the spring seat ring is in contact, the spring 12 is in a compressed state, and the end of the positioning pin 11 away from the threaded part 16 is connected to the pull plate 13 by thread. When the pull plate is pulled, the positioning pin 11 is retracted into the locking hole 9. When the pull plate is released, under the action of the spring 12, the limiting ring 10 drives the positioning pin 11 to move. The positioning pin 11 applies pressure to the adjusting rod 2, which improves the anti-loosening performance of the threaded part 16 under vibration, and ensures that the position of the adjusting rod 2 can be fixed after the adjustment is completed. Before the adjusting rod 2 is installed, the pull plate 13 contacts the high-pressure sealing plug 1, which plays a limiting role.

[0055] Specifically, when the length of the positioning pin 11 is less than the center hole diameter of the high-pressure sealing plug 1, the spring seat ring and the high-pressure sealing plug 1 can be integrally formed by precision casting, and the positioning pin 11 is inserted into the locking hole 9 from the center hole; when the length of the positioning pin 11 is greater than the center hole diameter of the high-pressure sealing plug 1, the spring seat ring and the high-pressure sealing plug 1 are connected by screws, which facilitates installation on the outside of the high-pressure sealing plug 1.

[0056] Example 2:

[0057] Based on Embodiment 1, in this embodiment, the outer wall of the high-pressure sealing plug 1 near the adjusting part 14 is connected to the connecting cover 5 by a thread. The connecting cover 5 has a connecting adjusting bolt 3 threaded through its side wall. The adjusting bolt 3 is used to lock the connecting cover 5. The end face of the connecting cover 5 is provided with a scale 6. The baffle 72 is a circular plate. The outer diameter of the baffle 72 is smaller than that of the scale 6. Markings are provided on the end face of the baffle 72 away from the scale 6, so that the opening size of the oil nozzle can be obtained by looking at the markings of the baffle 72 and the scale of the scale 6.

[0058] Install the high-pressure sealing plug 1, and after the adjusting rod 2 is engaged with the oil nozzle, loosen the adjusting bolt 3, rotate the connecting cover 5 to align the mark on the baffle 72 with the zero point of the dial 6, and then tighten the adjusting bolt 3 to complete the zeroing process.

[0059] Specifically, the scale of the dial 6 is calculated based on the pitch of the threaded part 16, the number of threads, the taper of the adjusting part 14, and the diameter of the oil nozzle. The trigonometric function and the formula for the area of ​​the annulus used are existing technologies, so they will not be elaborated further.

[0060] In this embodiment, the dial 6 is only used to indicate the change in the nozzle diameter of the adjusting rod 2 in one rotation. The travel of one rotation is made to meet the adjustment requirements by controlling the pitch and number of threads of the threaded part 16.

[0061] A method of using a device for adjusting the nozzle opening of a flowing well includes the following steps:

[0062] Connect the device to the nozzle seat on the oil well pipeline through the mating thread 4 of the high-pressure sealing plug 1. The mating thread 4 is sealed with thread sealant. Pull up the pull plate 13 and use a pad or wire to hold the pull plate 13 in place. Screw the adjusting rod 2 in until the nozzle is completely in contact, achieving a complete seal. Loosen the adjusting bolt 3, rotate the connecting cover 5, and align the mark on the baffle 72 with the zero point of the scale 6. Then tighten the adjusting bolt 3 to complete the zeroing. Loosen the pull plate 13 to complete the installation and commissioning of the device.

[0063] When adjusting the nozzle diameter, pull up the pull plate 13 and use a pad or wire to hold the pull plate 13 in place. Use a wrench in conjunction with the rotating handle 72 so that the mark on the baffle 72 is inside the wrench opening. Rotate the adjusting rod 2 with the wrench to change the diameter area of ​​the nozzle and the adjusting part 14, and observe the mark and the scale 6 to achieve stepless adjustment of the nozzle. After adjustment, release the pull plate 13. The spring 12 pushes the limit ring 10 and the positioning pin 11 to reset. The positioning pin 11 helps to fix the position of the internal adjusting rod 2, improves its vibration resistance, and ensures the stability of the nozzle after adjustment.

[0064] It should be noted that the nozzle and nozzle seat are existing technologies, such as the adjustable throttling device for self-flowing oil wells disclosed in announcement number CN204082089U. The mating thread 4 of this patented device can be connected to the threaded port on the right side of the main body in the prior art, and the adjusting part 14 of this patented device can be inserted into the nozzle in the prior art.

[0065] Example 3:

[0066] Please see Figures 4 to 8 This embodiment provides a device for adjusting the opening of a self-flowing well nozzle, including a high-pressure sealing plug 1. An adjusting rod 2 is linearly connected within the high-pressure sealing plug 1. The adjusting rod 2 includes an adjusting part 14, a sealing part 8, a threaded part 16, and a driving part 7. The adjusting part 14 extends out of the high-pressure sealing plug 1. The sealing part 8 seals against the inner wall of the high-pressure sealing plug 1. The threaded part 16 is threadedly connected to the inner wall of the high-pressure sealing plug 1, enabling linear movement. The driving part 7 is used to rotate the adjusting rod 2 with a tool. The high-pressure sealing plug 1 is equipped with a threaded locking mechanism corresponding to the threaded part 16, which locks the adjusting rod 2. In use, the adjusting part 14 cooperates with the nozzle, and the distance between the adjusting part 14 and the nozzle is adjusted by rotating the driving part 7, thereby adjusting the flow area of ​​the nozzle.

[0067] Among them, the high-pressure sealing plug 1 has a mating thread 4 at the outer end near the adjustment part 14, which is used to connect the oil nozzle to the wellhead oil nozzle sleeve.

[0068] Specifically, the adjusting part 14 has a conical head cylindrical structure. The adjusting part 14 is connected to the optical axis of the sealing part 8 through a threaded post, which makes it easy to replace the adjusting part 14 of different sizes to adapt to different oil nozzles.

[0069] Specifically, the sealing part 8 is a sealing ring, and the adjusting part 14 and the threaded part 16 are connected by an optical axis, on which two sealing rings are embedded for sealing.

[0070] Specifically, the threaded portion 16 is engaged with the inner wall of the high-pressure sealing plug 1 via a self-locking thread.

[0071] Specifically, the drive unit 7 extends out of the high-pressure sealing plug 1, and the drive unit 7 is provided with a rotating handle 71 outside the high-pressure sealing plug 1. The rotating handle 71 is a connecting handle.

[0072] Furthermore, the threaded locking mechanism includes a positioning bolt 17, and the high-pressure sealing plug 1 is provided with a radial locking hole 9 communicating with the interior. The locking hole 9 corresponds to the threaded part 16, and the positioning bolt 17 is threadedly connected to the locking hole 9. By applying pressure to the adjusting rod 2 through the positioning bolt 17, the anti-loosening performance of the threaded part 16 under vibration is improved, ensuring that the position of the adjusting rod 2 can be fixed after adjustment.

[0073] When adjusting the nozzle diameter, loosen the positioning bolt 17, rotate the adjusting rod 2 with a wrench to change the diameter area of ​​the nozzle and the adjusting part 14, and observe the mark and scale 6 to achieve stepless adjustment of the nozzle; after adjustment, tighten the positioning bolt 17. The positioning bolt 17 helps to fix the position of the internal adjusting rod 2, improve its vibration resistance, and ensure the stability of the nozzle after adjustment.

[0074] Furthermore, the outer wall of the high-pressure sealing plug 1 near the adjustment part 14 is connected to the connecting cover 5 by a thread. The side wall of the connecting cover 5 is provided with an adjustment hole 18, and the adjustment hole 18 is threadedly connected to an adjustment bolt 3. The adjustment bolt 3 is used to lock the connecting cover 5. The end face of the connecting cover 5 is provided with a scale 6.

[0075] Install the high-pressure sealing plug 1, and after the adjusting rod 2 is engaged with the oil nozzle, loosen the adjusting bolt 3, rotate the connecting cover 5, align the ridge line on the rotating handle 71 with the zero point of the scale 6, and then tighten the adjusting bolt 3 to complete the zeroing process.

[0076] Specifically, the scale of the dial 6 is calculated based on the pitch of the threaded part 16, the number of threads, the taper of the adjusting part 14, and the diameter of the oil nozzle. The trigonometric function and the formula for the area of ​​the annulus used are existing technologies, so they will not be elaborated further.

[0077] In this embodiment, the dial 6 is only used to indicate the change in the nozzle diameter of the adjusting rod 2 during one rotation. By controlling the pitch and number of threads of the threaded part 16, the stroke of one rotation is made to meet the adjustment requirements. Figure 8 The medium scale unit is square millimeters.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 device for self-bleed well choke opening adjustment comprising a nipple, a linearly moving connection adjustment stem inside the nipple, characterized in that, The adjusting rod includes an adjusting part, a sealing part, a threaded part, and a driving part; The adjusting part extends out of the plug, the sealing part seals with the inner wall of the plug, and the threaded part is threadedly connected to the inner wall of the plug; The plug is equipped with a thread locking mechanism corresponding to the threaded part, and the adjusting rod is locked by the thread locking mechanism; The threaded locking mechanism includes a locating pin; The plug is provided with a radial locking hole that communicates with the interior, the locking hole corresponds to the threaded part, and the positioning pin is provided in the locking hole; A limiting ring is provided on the outer wall of the positioning pin, the limiting ring is slidably engaged with the locking hole, and the positioning pin passes through the locking hole; A spring seat ring is provided at the end of the locking hole away from the limiting ring, and a spring is sleeved on the positioning pin. One end of the spring contacts the limiting ring and the other end contacts the spring seat ring. The spring is in a compressed state. The end of the positioning pin furthest from the threaded portion is connected to the pull plate; The threaded locking mechanism includes a positioning bolt, the plug is provided with a radial locking hole communicating with the interior, the locking hole corresponds to the threaded part, and the positioning bolt is threadedly connected to the locking hole; The adjustment section has a conical structure, tapering towards the end away from the plug; The center of the end of the adjusting part away from the plug is provided with a cylindrical head, the outer diameter of which is smaller than the minimum conical diameter of the adjusting part; The plug is provided with a tapered hole that mates with the adjustment part.

2. A device for regulating the opening of a well choke for a flowing well as claimed in claim 1, characterized in that The adjusting part is a conical head cylindrical structure, and the adjusting part is connected to the optical axis of the sealing part through a threaded post.

3. A device for regulating the opening of a well choke for a flowing well as claimed in claim 1, characterized in that, The sealing part is a sealing ring, and the adjusting part and the threaded part are connected by an optical axis, on which the sealing ring is embedded.

4. A device for regulating the opening of a well choke from a flowing well as claimed in claim 3, characterized in that The outer diameter of the optical axis is smaller than the outer diameter of the threaded part, and the outer diameter of the optical axis is equal to the maximum diameter of the tapered part of the adjusting part, so that there is an annular space between the sealing part and the threaded part, and grease is placed in this annular space.

5. A device for regulating the opening of a well choke for a flowing well as claimed in claim 1, characterized in that, The threaded part engages with the inner wall of the plug via a self-locking thread.

6. A device for regulating the opening of a well choke for a flowing well as claimed in claim 1, characterized in that The drive unit extends out of the plug, and a rotating handle is provided outside the plug on the drive unit. A baffle is provided at the end of the rotating handle away from the plug.

7. A device for regulating the opening of a well choke from a flowing well as claimed in claim 6, characterized in that A connecting cap is provided on the outer wall of the end of the plug near the adjustment part; A connecting adjustment bolt is threaded through the side wall of the connecting cover, and the adjusting bolt is used to lock the connecting cover. The end face of the connecting cover is provided with a scale, the baffle is a circular plate with an outer diameter smaller than the scale, and a marking is provided on the end face of the baffle away from the scale.

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