Faucet flushing pipe long-service-life self-adaptive pressurization compensation sealing device

Abstract

The invention relates to the technical field of drilling equipment, in particular to a faucet flushing pipe long-service-life self-adaptive pressurization compensation sealing device which comprises a flushing pipe and a dynamic sealing assembly located on the flushing pipe, and the dynamic sealing assembly comprises a lower packing box, an abutting cylinder structure, a sealing pressurization spacer ring and a first dynamic sealing packing; the lower packing box is sleeved at the lower end of the washing pipe; the abutting cylinder structure and the sealing pressurization distance ring are both located in the lower packing box, a first boss is arranged at the lower end of an inner ring of the sealing pressurization distance ring, and the first movable sealing packing is located between the first boss and the abutting cylinder structure above and arranged outside the wash pipe in a sealed and sleeved mode; a first pressurizing cavity is formed in the upper surface of the first boss in the circumferential direction, and the lower end of the waist part of the first dynamic sealing packing extends into the first pressurizing cavity and is in close fit with the inner wall of the first pressurizing cavity; a first pressurizing flow channel is formed in the inner ring wall face, close to the washing pipe, of the first boss, and the first pressurizing flow channel extends to the position below the waist portion of the first dynamic sealing packing and communicates with the first pressurizing cavity. The service life of the dynamic seal can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a long-life adaptive pressure-boosting compensation sealing device for a faucet flushing pipe. Background Art

[0002] The oil industry is related to the national economy and people's livelihood. The oil extraction process is mainly divided into three steps: drilling-cementing-oil production. In the extraction process, drilling is the first step, and its efficiency directly affects the development cycle of the oil well.

[0003] The top drive faucet of the drilling rig is a key component in the drilling rig system, responsible for providing sealing and rotation functions during drilling operations. The flush pipe sealing system is the weakest link in the top drive faucet of the drilling rig, and its sealing performance directly affects the life of the faucet and the drilling speed. The flush pipe seal is a high-pressure dynamic seal structure, and the sealing packing is concentratedly pressurized. During the operation of the faucet, the seal often fails due to wear and tear. The drilling fluid pressure required by current drilling technology is getting higher and higher, resulting in a sharp decrease in the sealing life of the traditional faucet packing. The main reason is that the mud pressure increases and the packing wear increases, resulting in a decrease in the packing sealing performance. This increases the number of drilling rig stoppages and packing replacements, seriously affecting the efficiency of drilling operations.

[0004] Therefore, there is an urgent need to improve the existing packing sealing structure so that it can maintain stable sealing performance under high-pressure environment and extend the service life of the packing, thereby reducing the frequency of drilling rig shutdown and packing replacement and improving drilling operation efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a long-life adaptive boost compensation sealing device for a faucet flushing pipe, so as to solve the problem of reduced sealing performance and short service life of the faucet flushing pipe packing sealing structure due to wear.

[0006] To achieve the above object, the present invention provides the following technical solutions: A long-life adaptive pressure-boosting compensating sealing device for a faucet flushing pipe comprises a flushing pipe and a dynamic sealing assembly located on the flushing pipe, wherein the dynamic sealing assembly comprises a lower packing box, an abutting cylinder structure, a sealing pressure-boosting spacer ring and a first dynamic sealing packing; the lower packing box is sleeved on the lower end of the flushing pipe and the opening faces downward; The abutment tube structure and the sealing and boosting spacer ring are both located inside the lower packing box and are sleeved on the outside of the punch pipe in sequence from top to bottom. The lower end of the inner ring of the sealing and boosting spacer ring is provided with a first boss along the circumference of the punch pipe. The first dynamic sealing packing is located between the first boss and the abutment tube structure above, and the sealing sleeve is provided on the outside of the punch pipe. A first boosting cavity is formed on the upper surface of the first boss along the circumference of the punch tube. The cross section of the first dynamic sealing packing is hook-shaped. The portion of the first dynamic sealing packing that bends toward the inner ring is a lip, and the other portion is a waist. The lower end of the waist of the first dynamic sealing packing extends into the first boosting cavity and fits tightly with the inner wall of the first boosting cavity. A first boosting channel is formed on the inner ring wall surface of the first boss close to the punch tube. The first boosting channel extends to below the waist of the first dynamic sealing packing and is connected with the first boosting cavity.

[0007] Furthermore, the abutment cylinder structure includes a dynamic seal lower spacer ring, a plurality of second dynamic seal packings and a plurality of intermediate pressurization spacer rings; the dynamic seal lower spacer ring and the plurality of intermediate pressurization spacer rings are all located inside the lower packing box and are sequentially sleeved on the outside of the punch pipe from top to bottom; a second boss is provided at the lower end of the inner ring of each intermediate pressurization spacer ring along the circumference of the punch pipe, a second dynamic seal packing is provided above each of the second bosses, and all the second dynamic seal packings are sealed and sleeved on the outside of the punch pipe; A second boosting cavity is opened on the upper surface of each of the intermediate boosting spacer rings along the circumference of the punching tube. The shape of the second dynamic sealing packing is consistent with that of the first dynamic sealing packing. The lower ends of the waists of all the second dynamic sealing packings extend into the corresponding second boosting cavity and are tightly matched with the inner wall of the corresponding second boosting cavity. A second boosting flow channel is opened on the inner ring wall surface of each of the second bosses. The second boosting flow channel extends to below the waist of the corresponding second dynamic sealing packing and is connected with the corresponding second boosting cavity.

[0008] Furthermore, the first boost flow channel and the second boost flow channel are each provided with a plurality, the plurality of the first boost flow channels are spaced and evenly arranged along the circumference of the sealing boost spacer ring, and the plurality of the second boost flow channels are spaced and evenly arranged along the circumference of the corresponding intermediate boost spacer ring.

[0009] Furthermore, the number of the first boosting flow channels and the number of the second boosting flow channels are 4 to 12 respectively.

[0010] Furthermore, the first dynamic sealing packing and the second dynamic sealing packing both include a packing body and an elastic pressurizing frame, the packing body is wrapped around the elastic pressurizing frame, and the elastic pressurizing frame applies an elastic extrusion force around the lip of the packing body toward the central axis of the inner ring of the packing body.

[0011] Furthermore, the packing body is made of a rubber material that is wear-resistant and has plastic deformation properties.

[0012] Furthermore, the elastic booster skeleton includes a supporting skeleton and a plurality of V-shaped spring clips arranged on the supporting skeleton, the supporting skeleton is annular, the plurality of V-shaped spring clips are arranged at intervals along the circumference of the supporting skeleton, and the ends of the plurality of V-shaped spring clips away from the supporting skeleton are bent toward the central axis of the inner ring of the supporting skeleton, and the plurality of V-shaped spring clips are used to press the corresponding parts of the lip of the packing body against the outer wall of the punch tube.

[0013] Furthermore, the lip working surface of the packing body is covered with wear-resistant composite fiber cloth.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the dynamic seal assembly at the lower end of the punch pipe rotates with the center pipe. The first dynamic seal packing in the dynamic seal assembly is used to perform rotational sealing on the lower end of the punch pipe, and is the weakest link in the packing sealing system. Since the sealing booster spacer ring is provided with a first booster flow channel and a first booster chamber, when the drilling fluid enters the dynamic seal assembly from the lower end of the punch pipe, the drilling fluid enters the first booster flow channel and the first booster chamber in turn. As the drilling fluid pressure increases, the fluid pressure in the first booster flow channel increases rapidly, thereby causing a dynamic increase in the pressure in the first booster chamber. The increase in the pressure in the first booster chamber can increase the force acting on the lower end of the waist of the first dynamic seal packing. The first dynamic seal packing The waist of the packing will be deformed upwards. Since the top of the first dynamic seal packing is pressed against the upper abutment tube structure, the upper part of the first dynamic seal packing will be deformed laterally. Since one side of the first dynamic seal packing is pressed against the sealing booster spacer ring, the upper part of the first dynamic seal packing will be deformed laterally toward the flushing pipe, thereby increasing the contact stress of the first dynamic seal packing holding the flushing pipe, adaptively and dynamically compensating for the problem of decreased sealing performance of the first dynamic seal packing due to rotational wear under high pressure. Through an effective dynamic compensation mechanism, the sealing performance of the packing is significantly improved, and the effective sealing time of the first dynamic seal packing is extended, that is, the service life of the first dynamic seal packing is extended. 2. When the first dynamic seal packing is severely worn and the seal between it and the flushing pipe fails, the drilling fluid will enter the inner ring of the intermediate booster spacer ring through the gap between the first dynamic seal packing and the flushing pipe, and the drilling fluid can enter the second booster flow channel and the second booster cavity of the intermediate booster spacer ring. When the drilling fluid pressure increases, it will cause the dynamic increase of the fluid pressure in the second booster flow channel and the second booster cavity in turn. The fluid in the second booster cavity will increase the force on the lower waist of the second dynamic seal packing, causing the second dynamic seal packing to deform upward. The top of the sealing packing is tightly pressed against the bottom of the intermediate boost spacer ring above, and the outer ring is tightly pressed against the corresponding inner ring of the intermediate boost spacer ring, resulting in lateral deformation of the upper part of the second dynamic sealing packing toward the punching tube, thereby increasing the contact stress of the second dynamic sealing packing holding the punching tube, so that the second dynamic sealing packing can dynamically compensate for the problem of decreased sealing performance of the second dynamic sealing packing due to rotational wear, which is beneficial to increase the effective sealing time of the second dynamic sealing packing, thereby increasing the effective service life of the entire dynamic sealing assembly, and reducing the frequency of maintenance and replacement of the dynamic sealing assembly; 3. V-shaped spring plates are arranged inside the first dynamic sealing packing and the second dynamic sealing packing. The V-shaped spring plates can press the sealing lips of the packing against the outer wall of the punching tube through their own elasticity, and as the first dynamic sealing packing and the second dynamic sealing packing wear, the V-shaped spring plates inside them can press the corresponding packing against the outer wall of the punching tube for a longer time. This mechanism effectively compensates for the decrease in the elastic-plastic properties of the sealing packing due to wear under high-pressure conditions, and improves the sealing performance and service life of the packing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the sealing and pressurizing spacer ring of the present invention; Figure 3 It is a schematic structural diagram of the intermediate booster spacer ring of the present invention; Figure 4 It is a principle diagram of the first dynamic sealing packing of the adaptive boost compensation function of the present invention; Figure 5 It is a structural schematic diagram of the first dynamic sealing packing of the present invention; Figure 6 It is a schematic structural diagram of the elastic pressurized skeleton of the present invention; Figure 7 This is a schematic diagram of the first dynamic sealing packing of the adaptive mechanical compensation function of the present invention.

[0016] Marks and corresponding parts names in the attached drawings: 1. Punch pipe; 2. Upper packing box; 3. Static seal lower spacer ring; 4. Static seal packing; 5. Static seal spacer ring; 6. Static seal mounting groove; 7. Lower packing box; 8. Abutment tube structure; 9. Sealing booster spacer ring; 10. First dynamic seal packing; 11. First boss; 12. First booster flow channel; 13. First booster chamber; 14. Lip; 15. Waist; 16. Dynamic seal lower spacer ring; 17. Second dynamic seal packing; 18. Middle booster spacer ring; 19. Second boss; 20. Second booster flow channel; 21. Second booster chamber; 22. Packing body; 23. Elastic booster skeleton; 24. Support skeleton; 25. V-shaped spring piece; 26. Wear-resistant composite fiber cloth; 27. First O-ring; 28. Second O-ring; 29. ​​First mounting groove; 30. Second mounting groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1 A long-life adaptive pressure-boosting compensation sealing device for faucet flushing pipe, referring to Figure 1 , Figure 2 , Figure 3 as well as Figure 4, including a flushing pipe 1, a static sealing assembly located on the flushing pipe 1 and a dynamic sealing assembly; the static sealing assembly includes an upper packing box 2, a static sealing lower spacer ring 3, a static sealing packing 4 and a static sealing spacer ring 5 which are sequentially installed in the upper packing box 2, the upper packing box 2 is sleeved on the upper end of the flushing pipe 1 and the opening is facing upward, the upper packing box 2 is connected to the flushing pipe 1 through a pin and connected to the gooseneck pipe through a union, and the end of the static sealing spacer ring 5 facing the opening of the upper packing box 2 is provided with a first O-ring 27, which plays a sealing role with the gooseneck pipe; the static sealing lower spacer ring 3 and the sealing spacer ring form a static sealing installation groove 6, the static sealing packing 4 is located in the static sealing installation groove 6, and the static sealing packing 4 is sealed and sleeved on the outer wall of the punch pipe 1; the dynamic sealing assembly includes a lower packing box 7, an abutting tube structure 8, a sealing and pressurizing spacer ring 9 and a first dynamic sealing packing 10; the lower packing box 7 is sleeved on the lower end of the punch pipe 1 with the opening facing downward; the abutting tube structure 8 and the sealing and pressurizing spacer ring 9 are both located inside the lower packing box 7 and sleeved on the outside of the punch pipe 1 from top to bottom, and the sealing and pressurizing spacer ring 9 is annular in shape as a whole. The lower end of the inner ring of the sealing booster spacer ring 9 protrudes inward to form an annular first boss 11, and the abutment tube structure 8 is located at the upper end of the sealing booster spacer ring 9. The bottom wall of the abutment tube structure 8 and the first boss 11 are combined to form a first mounting groove 29. The first dynamic sealing packing 10 is located in the first mounting groove 29 and the sealing sleeve is arranged outside the punching pipe 1; the mounting platform of the sealing booster spacer ring 9 is provided with a first boosting flow channel 12 on the inner ring end surface close to the punching pipe 1, and the upper surface of the first boss 11 is provided with a first boosting cavity 1 along the circumference of the punching pipe 1. 3, the first boosting chamber 13 is connected with the first boosting flow channel 12 below; the cross section of the first dynamic sealing packing 10 is hook-shaped, the part of the first dynamic sealing packing 10 that bends toward the inner circle is the lip 14, and the other part is the waist 15, and the lip 14 is used to seal against the outer wall of the punching pipe 1; the lower end of the waist 15 of the first dynamic sealing packing 10 extends into the first boosting chamber 13 and leaves a gap between the inner bottom wall of the first boosting flow channel 12, and the waist 15 of the first dynamic sealing packing 10 is tightly matched with the inner wall of the first boosting chamber 13. A second O-ring is provided at one end of the sealing boosting spacer ring 9 facing the opening direction of the lower packing box 7, which plays a sealing role with the center tube.

[0019] In this solution, the upper packing assembly does not rotate during operation and has a longer service life; the dynamic sealing assembly at the lower end of the punch tube 1 rotates with the center tube, and the first dynamic sealing packing 10 in the dynamic sealing assembly is used to perform rotational sealing on the lower end of the punch tube 1, and is the weakest link in the packing sealing system. Since the sealing booster spacer ring 9 is provided with a first booster channel 12 and a first booster chamber 13, when the drilling fluid enters the dynamic sealing assembly from the lower end of the punch tube 1, the drilling fluid enters the first booster channel 12 and the first booster chamber 13 in turn. As the drilling fluid pressure increases, the fluid pressure in the first booster channel 12 will increase rapidly, thereby causing a dynamic increase in the pressure in the first booster chamber 13. The increase in the pressure in the first booster chamber 13 can increase its effect on the lower end of the waist 15 of the first dynamic sealing packing 10. Due to the force, the waist 15 of the first dynamic sealing packing 10 will be deformed upward. Since the top of the first dynamic sealing packing 10 is tightly pressed against the upper abutting tube structure 8, the upper part of the first dynamic sealing packing 10 will be deformed laterally. Since one side of the first dynamic sealing packing 10 is tightly pressed against the sealing booster spacer ring 9, the upper part of the first dynamic sealing packing 10 will be deformed laterally toward the flushing pipe 1, thereby increasing the contact stress of the first dynamic sealing packing 10 holding the flushing pipe 1, adaptively and dynamically compensated for the problem of reduced sealing performance of the first dynamic sealing packing 10 caused by rotational wear under high pressure. Through an effective dynamic compensation mechanism, the sealing performance of the packing is significantly improved, and the effective sealing time of the first dynamic sealing packing 10 is extended, that is, the service life of the first dynamic sealing packing 10 is extended.

[0020] Example 2 Based on Example 1, in this example, reference Figure 1 , Figure 2 , Figure 3 ,as well as Figure 4The abutment tube structure 8 includes a dynamic seal lower spacer ring 16, three second dynamic seal packings 17 and three intermediate booster spacer rings 18; the dynamic seal lower spacer ring 16 and the three intermediate booster spacer rings 18 are all located inside the lower packing box 7 and are sequentially sleeved on the outside of the punch tube 1 from top to bottom, and the dynamic seal lower spacer ring 16 and the three intermediate booster spacer rings 18 overlap and combine from top to bottom to form the above-mentioned abutment tube structure 8; the lower end of the inner ring of each intermediate booster spacer ring 18 protrudes inward to form a second boss 19, and the seal booster spacer ring 9 and the lowest intermediate booster spacer ring The bottom wall of the dynamic seal lower spacer 16 is combined to form the above-mentioned first installation groove 29; the second installation groove 30 is formed between two adjacent intermediate boost spacer rings 18 (the intermediate boost spacer ring 18 located at the top serves as the upper wall of the second installation groove 30, and the intermediate boost spacer ring 18 serves as the side wall and the lower wall of the second installation groove 30, wherein the corresponding second boss 19 serves as the lower wall of the second installation groove 30), and the second installation groove 30 is also formed between the dynamic seal lower spacer 16 and the uppermost intermediate boost spacer 18 (the dynamic seal lower spacer 16 serves as the second installation The upper wall of the groove 30, the uppermost intermediate boost spacer ring 18 serves as the side wall and the lower wall of the second installation groove 30, wherein the corresponding second boss 19 serves as the lower wall of the second installation groove 30), all the second installation grooves 30 are opened in the direction close to the punch pipe 1; all the second installation grooves 30 are installed with second dynamic sealing packings 17, and all the second dynamic sealing packings 17 are sealed and sleeved on the outside of the punch pipe 1, that is, the inner ring of the second dynamic sealing packing 17 is sealed with the outer wall of the punch pipe 1; each intermediate boost spacer ring 18 is on the inner ring end face close to the punch pipe 1 A second boost flow channel 20 is opened, and a second boost cavity 21 is opened on the upper surface of each second boss 19 along the circumference of the punch tube 1, and each second boost cavity 21 is connected with the corresponding second boost flow channel 20 below; the shape of the second dynamic sealing packing 17 is consistent with the first dynamic sealing packing 10, and the lower end of the waist 15 of all the second dynamic sealing packings 17 extends into the corresponding second boost cavity 21 and leaves a distance between the inner bottom wall of the second boost flow channel 20, and the waist 15 of the second dynamic sealing packing 17 is tightly matched with the inner wall of the corresponding second boost cavity 21.

[0021] In this solution, when the first dynamic seal packing 10 is severely worn and the seal between it and the punch pipe 1 fails, the drilling fluid will enter the inner ring of the intermediate booster spacer ring 18 through the gap between the first dynamic seal packing 10 and the punch pipe 1, and the drilling fluid can enter the second booster flow channel 20 and the second booster chamber 21 of the intermediate booster spacer ring 18. When the drilling fluid pressure increases, it will cause the dynamic increase of the fluid pressure in the second booster flow channel 20 and the second booster chamber 21 in turn. The fluid in the second booster chamber 21 will increase the force on the lower part of the waist 15 of the second dynamic seal packing 17, causing the second dynamic seal packing 17 to deform upward. Since the top of the second dynamic seal packing 17 is tightly pressed against the bottom of the intermediate boost spacer ring 18 above, and the outer ring is tightly pressed against the corresponding inner ring of the intermediate boost spacer ring 18, the upper part of the second dynamic seal packing 17 undergoes lateral deformation toward the flushing pipe 1, thereby increasing the contact stress of the second dynamic seal packing 17 holding the flushing pipe 1, so that the second dynamic seal packing 17 can dynamically compensate for the problem of reduced sealing performance of the second dynamic seal packing 17 caused by rotational wear, which is beneficial to increase the effective sealing time of the second dynamic seal packing 17, thereby increasing the effective service life of the entire dynamic seal assembly, and reducing the frequency of repairing and replacing the dynamic seal assembly. All fluid pressure is first concentrated on the first dynamic seal packing 10, until the first dynamic seal packing 10 is worn, all fluid pressure is concentrated on the second dynamic seal packing 17, and after the current second dynamic seal packing 17 is worn, the fluid pressure is concentrated on the next second dynamic seal packing 17, and so on in sequence, and all sealing packings are replaced only after they fail.

[0022] Example 3 Based on Example 2, in this example, refer to Figure 2 , Figure 3 , there are multiple first boosting flow channels 12 and multiple second boosting flow channels 20, multiple first boosting flow channels 12 are spaced and evenly arranged along the circumference of the sealing boosting spacer ring 9, and multiple second boosting flow channels 20 are spaced and evenly arranged along the circumference of the corresponding intermediate boosting spacer ring 18. The array angle of the multiple first boosting flow channels 12 on the sealing boosting spacer ring 9 is 30~90°, and the array angle of the multiple second boosting flow channels 20 on the intermediate boosting spacer ring 18 is 30~90°, that is, the number of the first boosting flow channels 12 is 4~12, the number of the second boosting flow channels 20 is 4~12, the number of the first boosting chambers 13 is consistent with the number of the first boosting flow channels 12, and the number of the second boosting chambers 21 is consistent with the number of the second boosting flow channels 20, so that the drilling fluid can perform more uniform dynamic compensation extrusion on different parts of the first dynamic sealing packing 10 or the second dynamic sealing packing 17.

[0023] Example 4 Based on Example 2, in this example, refer to Figure 1 , Figure 5 , Figure 6 as well as Figure 7 The first dynamic sealing packing 10 and the second dynamic sealing packing 17 both include a packing body 22 and an elastic pressurizing skeleton 23. The packing body 22 is wrapped around the elastic pressurizing skeleton 23, and the elastic pressurizing skeleton 23 applies an elastic extrusion force toward the central axis of the inner ring of the packing body 22 to the lip 14 of the packing body 22.

[0024] Specifically, the packing body 22 is made of a wear-resistant rubber material with plastic deformation performance. The elastic booster skeleton 23 includes a support skeleton 24 and a plurality of V-shaped spring clips 25 welded and fixed to the support skeleton 24. The support skeleton 24 is annular. The plurality of V-shaped spring clips 25 are located on the same side of the circumferential direction of the support skeleton 24. The plurality of V-shaped spring clips 25 are arranged at intervals along the circumference of the support skeleton 24, and the ends of the plurality of V-shaped spring clips 25 away from the support skeleton 24 are bent toward the inner circle center axis direction of the support skeleton 24. The plurality of V-shaped spring clips 25 are used to press the corresponding parts of the lip 14 of the packing body 22 against the outer wall of the punch pipe 1; the working surface of the lip 14 of the packing body 22 is covered with a wear-resistant composite fiber cloth 26.

[0025] In this solution, the first dynamic sealing packing 10 and the second dynamic sealing packing 17 are both provided with V-shaped spring pieces 25. The V-shaped spring pieces 25 can press the sealing lip of the packing against the outer wall of the punch tube 1 through their own elasticity. As the first dynamic sealing packing 10 and the second dynamic sealing packing 17 wear, the V-shaped spring pieces 25 inside can press the corresponding packing against the outer wall of the punch tube 1 for a longer time. This mechanism effectively compensates for the decrease in the elastic-plastic properties of the sealing packing due to wear under high pressure conditions, and improves the sealing performance and service life of the packing. The packing body 22 itself is made of a wear-resistant rubber material with good plastic deformation properties, so that the packing body 22 is easy to deform and will not counteract the elastic force of the V-shaped spring piece 25, so that the V-shaped spring piece 25 can give full play to its elastic extrusion force and press the sealing lip 14 of the packing body 22 against the outer wall of the punch tube 1. The sealing lip of the packing body 22 is covered with a layer of chemically bonded wear-resistant composite fiber cloth 26 to enhance the strength and wear resistance of the packing body 22, reduce the risk of tearing, and extend the service life.

[0026] The long-life adaptive boost compensation sealing device for the faucet flushing pipe 1 proposed in the present invention enhances the wear resistance and sealing performance of the packing sealing structure through its unique dual sealing performance compensation mechanisms of adaptive boost compensation and elastic boost compensation, and the wear-resistant composite fiber cloth 26 covering the sealing surface, thereby achieving efficient, stable and long-life operation of the faucet flushing pipe 1 sealing system in drilling operations, and providing strong support for technological progress in the field of oil and gas drilling.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A long-life adaptive pressure-boosting compensation sealing device for a faucet flushing pipe, comprising a flushing pipe (1) and a dynamic sealing assembly located on the flushing pipe (1), characterized in that: The dynamic seal assembly comprises a lower packing box (7), an abutment tube structure (8), a sealing and pressurizing spacer ring (9) and a first dynamic seal packing (10); the lower packing box (7) is sleeved on the lower end of the flushing pipe (1) with its opening facing downward; The abutment tube structure (8) and the sealing and pressurizing spacer ring (9) are both located inside the lower packing box (7) and are sequentially sleeved on the outside of the punching tube (1) from top to bottom. The lower end of the inner ring of the sealing and pressurizing spacer ring (9) is provided with a first boss (11) along the circumference of the punching tube (1). The first dynamic sealing packing (10) is located between the first boss (11) and the abutment tube structure (8) above, and the sealing sleeve is arranged on the outside of the punching tube (1). A first boosting chamber (13) is formed on the upper surface of the first boss (11) along the circumference of the punch tube (1); the cross section of the first dynamic sealing packing (10) is hook-shaped; the portion of the first dynamic sealing packing (10) that bends toward the inner circle is a lip (14), and the other portion is a waist (15); the lower end of the waist (15) of the first dynamic sealing packing (10) extends into the first boosting chamber (13) and is tightly matched with the inner wall of the first boosting chamber (13); a first boosting flow channel (12) is formed on the inner wall surface of the first boss (11) close to the punch tube (1); the first boosting flow channel (12) extends to below the waist of the first dynamic sealing packing (10) and is connected to the first boosting chamber (13).

2. According to claim 1, a faucet flushing pipe long-life adaptive boosting compensation sealing device is characterized in that: The abutment cylinder structure (8) comprises a dynamic sealing lower spacer ring (16), a plurality of second dynamic sealing packings (17) and a plurality of intermediate boosting spacer rings (18); the dynamic sealing lower spacer ring (16) and the plurality of intermediate boosting spacer rings (18) are all located inside the lower packing box (7) and are sleeved on the outside of the punch pipe (1) in sequence from top to bottom; a second boss (19) is provided at the lower end of the inner ring of each intermediate boosting spacer ring (18) along the circumference of the punch pipe (1), a second dynamic sealing packing (17) is provided above each second boss (19), and all the second dynamic sealing packings (17) are sealingly sleeved on the outside of the punch pipe (1); The upper surface of each intermediate boosting spacer ring (18) is provided with a second boosting cavity (21) along the circumference of the punching tube (1); the shape of the second dynamic sealing packing (17) is consistent with that of the first dynamic sealing packing (10); the lower ends of the waists (15) of all the second dynamic sealing packings (17) extend into the corresponding second boosting cavity (21) and are tightly matched with the inner wall of the corresponding second boosting cavity (21); the inner ring wall surface of each second boss (19) is provided with a second boosting flow channel (20); the second boosting flow channel (20) extends to below the waist of the corresponding second dynamic sealing packing (17) and is connected to the corresponding second boosting cavity (21).

3. A faucet flushing pipe long-life adaptive pressure-boosting compensation sealing device according to claim 2, characterized in that: The first boost flow channel (12) and the second boost flow channel (20) are each provided with a plurality, wherein the plurality of the first boost flow channels (12) are spaced and evenly arranged along the circumference of the sealing boost spacer ring (9), and the plurality of the second boost flow channels (20) are spaced and evenly arranged along the circumference of the corresponding intermediate boost spacer ring (18).

4. The long-life adaptive pressure-boosting compensating sealing device for faucet flushing pipe according to claim 3 is characterized by: The number of the first pressurizing flow channels (12) and the number of the second pressurizing flow channels (20) are 4 to 12 respectively.

5. According to claim 2, a faucet flushing pipe long-life adaptive pressure-boosting compensation sealing device is characterized in that: The first dynamic sealing packing (10) and the second dynamic sealing packing (17) both comprise a packing body (22) and an elastic pressure-boosting frame (23); the packing body (22) is wrapped around the elastic pressure-boosting frame (23), and the elastic pressure-boosting frame (23) applies an elastic extrusion force toward the central axis of the inner ring of the packing body (22) to the lip (14) of the packing body (22).

6. The long-life adaptive pressure-boosting compensating sealing device for faucet flushing pipe according to claim 5, characterized in that: The packing body (22) is made of a rubber material that is wear-resistant and has plastic deformation properties.

7. The long-life adaptive pressure-boosting compensating sealing device for faucet flushing pipe according to claim 5, characterized in that: The elastic booster skeleton (23) comprises a support skeleton (24) and a plurality of V-shaped spring pieces (25) arranged on the support skeleton (24); the support skeleton (24) is annular; the plurality of V-shaped spring pieces (25) are arranged at intervals along the circumference of the support skeleton (24); and the ends of the plurality of V-shaped spring pieces (25) away from the support skeleton (24) are bent toward the central axis of the inner ring of the support skeleton (24); the plurality of V-shaped spring pieces (25) are used to press the corresponding parts of the lip (14) of the packing body (22) against the outer wall of the punch tube (1).

8. The long-life adaptive pressure-boosting compensating sealing device for faucet flushing pipe according to claim 4, characterized in that: The working surface of the lip portion (14) of the packing body (22) is covered with a wear-resistant composite fiber cloth (26).

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