CN223648533U - A packing seal structure for a water tap in oil drilling - Google Patents
A packing seal structure for a water tap in oil drillingInfo
- Publication number
- CN223648533U CN223648533U CN202520402475.7U CN202520402475U CN223648533U CN 223648533 U CN223648533 U CN 223648533U CN 202520402475 U CN202520402475 U CN 202520402475U CN 223648533 U CN223648533 U CN 223648533U
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- ring
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- sealing
- packing box
- groove
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Abstract
本实用新型提供一种石油钻井用水龙头的盘根密封结构，涉及石油钻井技术领域，包括泥浆管，泥浆管上套设有盘根盒，泥浆管的上端部通过上密封组件连接水龙头的鹅颈管，盘根盒外圆下端面通过下密封组件与水龙头中心管连接，盘根盒的上端部通过中密封组件使盘根盒与泥浆管实现加压密封。本实用新型结构简单实用，受力合理，本申请通过采用多个密封件对结构进行改进后，可以根据工作压力的大小自我调整盘根的压紧力，不仅操作方便，对装配要求较低，同时可以提高密封效果，延长盘根使用寿命。
This utility model provides a packing sealing structure for a water tap in oil drilling, relating to the field of oil drilling technology. It includes a mud pipe with a packing box fitted onto it. The upper end of the mud pipe is connected to the gooseneck of the water tap via an upper sealing component. The lower end face of the outer circumference of the packing box is connected to the central tube of the water tap via a lower sealing component. The upper end of the packing box is pressurized and sealed to the mud pipe via a middle sealing component. This utility model has a simple and practical structure with reasonable stress distribution. By employing multiple sealing components to improve the structure, it can automatically adjust the packing clamping force according to the working pressure, making operation convenient, reducing assembly requirements, improving sealing effect, and extending the service life of the packing.
Description
Technical Field
The utility model relates to the technical field of petroleum drilling, in particular to a packing sealing structure of a faucet for petroleum drilling.
Background
The existing water tap for petroleum drilling adopts packing, but the sealing structure of the packing has a plurality of problems at present. The packing box at present is mostly monolithic, installs parts such as backing ring, packing, backing ring, lower clamping ring in proper order in the packing box, and the mud pipe runs through in backing ring, packing, backing ring to rely on the screw thread screwing force of lower nut and tap center tube to make the packing compress tightly, improve sealed effect. However, the structure has higher requirement on the pre-pressure of the packing, the packing can be damaged in the use process, and the service life of the packing is reduced. Therefore, a new solution is needed to solve the above-mentioned problems.
Disclosure of utility model
The utility model aims to provide a packing sealing structure of a water tap for petroleum drilling, which solves one or more problems in the prior art.
In order to achieve the above purpose, the application provides a packing sealing structure of a tap for petroleum drilling, which comprises a slurry pipe, wherein a packing box is sleeved on the slurry pipe, the upper end part of the slurry pipe is connected with a gooseneck of the tap through an upper sealing assembly, the lower end surface of the outer circle of the packing box is connected with a central pipe of the tap through a lower sealing assembly, and the upper end part of the packing box enables the packing box to be pressurized and sealed with the slurry pipe through a middle sealing assembly.
As a preferable mode that can realize, go up seal assembly and include last nut and last clamping ring, go up nut and gooseneck threaded connection, the inside of last clamping ring is inserted to the upper end of mud pipe, goes up the clamping ring and is pressed tightly the laminating by last nut on the terminal surface of gooseneck.
As a preferable mode, the upper end face and the inner hole of the upper pressing ring are respectively provided with a first ring groove and a second ring groove, and a first sealing ring and a second sealing ring are respectively arranged in the first ring groove and the second ring groove.
As a preferable mode which can be realized, the inner hole of the upper pressing ring is also provided with an inner spline-shaped tooth form, the upper end of the slurry pipe is provided with an outer spline-shaped tooth form and a steel wire check ring clamping groove, the outer spline-shaped tooth form of the upper end of the slurry pipe is inserted into the inner spline-shaped tooth slot of the upper pressing ring, and the steel wire check ring is arranged in the steel wire check ring clamping groove of the slurry pipe.
As a preferable mode which can be realized, the lower sealing component comprises a lower nut and a lower pressing ring, the lower nut is connected with the central tube of the faucet through trapezoidal threads, a third ring groove and a fourth ring groove are respectively formed in the lower end face and the outer circular face of the lower pressing ring, and a third sealing ring and a fourth sealing ring are correspondingly arranged in the third ring groove and the fourth ring groove respectively.
As a preferable mode which can be realized, the lower end of the outer circle of the packing box and the lower end of the inner end are respectively provided with a step surface, the lower nut applies axial compression force on the step surface of the outer circle of the packing box through screwing, and the axial compression force is transmitted to the lower compression ring through the step surface of the inner hole, so that the lower end surface of the lower compression ring is compressed on the end surface of the central pipe of the faucet.
As a preferable mode which can be realized, the middle sealing component comprises a middle pressure ring and a compression nut, the middle pressure ring is sleeved on the outer circle of the slurry pipe, the outer circle of the middle pressure ring is contacted with the inner circle of the packing box in a matched manner, the upper end of the outer circle of the packing box is provided with external threads, and the compression nut is provided with internal threads matched with the external threads and screwed on the packing box.
As a preferable mode that can realize, the packing box includes backing ring and backing ring, is equipped with a plurality of packing between well clamping ring and the lower clamping ring, is equipped with between the adjacent packing the backing ring, the packing that is closest to the lower clamping ring with set up the backing ring between the lower clamping ring, every the outer disc of backing ring all sets up the fifth round groove, installs the fifth sealing washer in every fifth round inslot, and the sixth round groove is also established to the outer disc of backing ring, install the sixth sealing washer in the sixth round groove, gland nut compresses tightly well clamping ring, packing, backing ring in proper order through the screw thread screwing power with the packing box until the packing force is used on the inner step of packing box.
As a preferable mode which can be realized, radial gaps are formed between the outer circle of the slurry pipe and inner holes of the middle pressure ring, the lining ring, the backing ring and the lower pressure ring, and axial gaps are formed among the middle pressure ring, the lining ring, the backing ring and the lower pressure ring.
Compared with the prior art, the utility model has the beneficial effects that:
The packing device is simple and practical in structure and reasonable in stress, and after the structure is improved by adopting the plurality of sealing elements, the packing device can self-adjust the packing pressing force according to the working pressure, is convenient to operate, has lower assembly requirements, can improve the sealing effect and prolongs the service life of the packing.
Drawings
FIG. 1 is a schematic view of a packing seal structure of a petroleum drilling water tap according to the present utility model;
Fig. 2 is an enlarged view of a portion of a packing seal structure of a faucet for petroleum drilling according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiments of the present utility model, all the expressions "first", "second", "third" and "fourth" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the expressions "first", "second", "third" and "fourth" are merely for convenience of description, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
In the description of the present utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1-2, the utility model provides a packing sealing structure of a tap for petroleum drilling, which comprises a slurry pipe 6, an upper nut 1, an upper pressing ring 4, a compression nut 7, a middle pressing ring 8, a packing 10, a lining ring 11, a packing ring 12, a packing box 13, a lower nut 15, a lower pressing ring 16 and the like, wherein the packing box 13 is sleeved on the slurry pipe 6, the upper end part of the slurry pipe 6 is connected with a gooseneck 18 of the tap through an upper sealing component, the lower end surface of the outer circle of the packing box 13 is connected with a central pipe of the tap through a lower sealing component, and the upper end part of the packing box 13 realizes pressurized sealing between the packing box 13 and the slurry pipe 6 through the middle sealing component. It should be noted that the ring grooves referred to in the present utility model are all O-ring grooves, and the seal rings are all O-ring seals. Meanwhile, the slurry pipe 6 penetrates through the inner holes of the medium-pressure ring 7, the packing 10, the lining ring 11, the packing ring 12 and the lower pressing ring 16, radial gaps exist between the outer circle of the slurry pipe 6 and the inner holes of the medium-pressure ring 7, the lining ring 11, the packing ring 12 and the lower pressing ring 16, axial gaps exist among the medium-pressure ring 8, the lining ring 11, the packing ring 12 and the lower pressing ring 16, and the outer circle of the slurry pipe 6 is pressed and sealed by the inner holes of the packing 10 through elastic deformation of the packing.
Specifically, as shown in the figure, the upper sealing assembly comprises an upper nut 1 and an upper pressing ring 4, the upper nut 1 is in threaded connection with a gooseneck 18 through trapezoidal threads, a first ring groove and a second ring groove are respectively formed in the upper end face and the inner hole of the upper pressing ring 4, and a first sealing ring 2 and a second sealing ring 5 are respectively arranged in the first ring groove and the second ring groove. The inner hole of the upper pressing ring 4 is further provided with an inner spline-shaped tooth form, the upper end of the slurry pipe 6 is provided with an outer spline-shaped tooth form and a steel wire check ring clamping groove, the outer spline-shaped tooth form of the upper end of the slurry pipe 6 is inserted into the inner spline-shaped tooth groove of the upper pressing ring 4, namely the upper end part of the slurry pipe 6 is inserted into the upper pressing ring 4, the upper pressing ring 4 is pressed and attached to the end face of the gooseneck 18 by the upper nut 1, and the steel wire check ring 3 is installed in the steel wire check ring clamping groove of the slurry pipe 6.
The lower sealing assembly is specifically described below, and comprises a lower nut 15 and a lower pressing ring 16, wherein the lower nut 15 is connected with a faucet central tube through trapezoidal threads, a third ring groove of an O-type and a fourth ring groove of an O-type are respectively formed in the lower end surface and the outer circular surface of the lower pressing ring 16, the third sealing ring 14 of the O-type is installed in the O-type ring groove of the outer circular surface of the lower pressing ring 16, namely, the third ring groove, and the fourth sealing ring 17 of the O-type is installed in the O-type ring groove of the lower end surface of the lower pressing ring 16, namely, the fourth ring groove.
As shown in the figure, the lower end of the outer circle of the packing box 13 is provided with a step surface, the lower end of the inner hole of the packing box 13 is also provided with a step surface, and the lower nut 15 applies an axial compression force on the outer circle step surface of the packing box 13 by screwing and transmits the axial compression force to the lower compression ring 16 through the inner hole step surface, so that the lower end surface of the lower compression ring is compressed on the end surface of the central pipe 19 of the faucet.
The following specifically illustrates a middle sealing assembly, the middle sealing assembly comprises a middle pressing ring 8 and a compression nut 7, the middle pressing ring 8 is sleeved on the outer circle of the mud pipe 6, the outer circle of the middle pressing ring 8 is in matched contact with the inner circle of the packing box, the outer circle upper end of the packing box 13 is provided with external threads, and the compression nut is provided with matched internal threads and screwed on the packing box. The packing box 13 includes packing 10, backing ring 12 and backing ring 11, is equipped with a plurality of packing 10 between middling pressure ring 8 and the lower clamping ring 16, is equipped with between the adjacent packing backing ring 11, the packing that is closest to lower clamping ring 16 with set up backing ring 12 between the lower clamping ring 16, the outer disc of every backing ring 11 all sets up the fifth round groove, every install the fifth sealing washer in the fifth round groove, the sixth round groove is also established to the outer disc of backing ring 12, install the sixth sealing washer in the sixth round groove, gland nut 7 compresses tightly middling pressure ring 8, packing 10, backing ring 11 in proper order through the screw thread screwing force with packing box 13 until the holding power is acted on the inner step of packing box.
When the upper nut 1 is used, the upper nut 1 is screwed on the gooseneck 18 to compress the upper compression ring 4, the end face of the upper compression ring 4 and the end face of the gooseneck 18 are sealed by means of O-shaped sealing rings, the inner hole of the upper compression ring 4 and the outer circle of the slurry pipe 5 are sealed by means of O-shaped sealing rings, the inner spline tooth grooves of the inner hole of the upper compression ring 4 are matched with the outer spline tooth shapes on the outer circle of the slurry pipe 6, when the upper nut 1 compresses the upper compression ring 4 on the end face of the gooseneck 18, the upper compression ring 4 cannot rotate, the slurry pipe 6 cannot rotate, therefore, the upper structure is static seal, the O-shaped sealing rings replace the traditional packing seal, and the compression force requirement when the upper nut 1 is assembled is low, and the upper nut 1 is screwed with normal torque.
When the sealing device is used, the lower nut 15 is screwed on the central tube, the packing box 13 is used for pressing the lower pressing ring 16, the end face of the lower pressing ring 16 is sealed with the end face of the central tube of the faucet by means of the O-shaped sealing ring, and the outer circle of the lower pressing ring 16 is sealed with the inner hole of the packing box 13 by means of the O-shaped sealing ring. When the lower nut 15 presses the lower pressing ring 16 on the end face of the central pipe through the packing box 13, the lower nut 15, the packing box 13, the lower pressing ring 16, the pressing nut 7, the middle pressing ring 8, the packing 10, the lining ring 11, the lining ring 12 and the like which are arranged in the packing box rotate along with the central pipe of the faucet, the mud pipe 6 is fixed, and the inner lip edge of the packing 10 and the mud pipe 6 rotate relatively, so that the sealing is dynamic sealing.
When high-pressure slurry flows from the gooseneck through the slurry pipe 6 and enters the inner hole of the central pipe, a high-pressure sealing cavity is formed, and the high-pressure slurry enters the following parts:
1) The contact surface A between the end surface of the central tube of the water faucet and the lower end surface of the lower pressing ring 16, mud is blocked by the fourth sealing ring 17 of the O type, and leakage does not occur at the position;
2) The mud enters an axial clearance C between the backing ring 12 and the lower compression ring 16 through an annular clearance B between the outer circle of the mud pipe 6 and the inner hole of the lower sealing ring 16, and an O-shaped sealing ring arranged on the outer circle of the backing ring 12 and the inner hole of the packing box 13 form a seal. The hydraulic pressure of the high-pressure slurry in the axial clearance C acts on the end surfaces of the lower pressing ring 16 and the backing ring 12 at the same time, the generated axial force further presses the lower pressing ring 16 on the end surface of the central pipe, and meanwhile, the backing ring 12 is compressed towards the packing direction to further press the packing 10, so that the larger the hydraulic pressure of the slurry is, the larger the pressing force is, and the better the sealing effect is. If the working pressure of the slurry is not large, the packing does not need to be pressed too much, so that the service life of the packing is prolonged under the condition that the packing is not always pressed and compressed;
3) After the slurry enters the cavity D through the annular gap B between the outer circle of the slurry pipe 6 and the inner holes of the lower sealing ring 16 and the backing ring 12, the inner lip of the packing 10 is extruded and deformed by the hydraulic pressure of the slurry, so that the inner lip is attached to the outer circle of the slurry pipe 6, and the sealing effect is better as the hydraulic pressure of the slurry is higher. If the working pressure of the slurry is not large, the packing does not need to be pressed too much, so that the service life of the packing is prolonged under the condition that the packing is not always pressed and compressed.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a packing seal structure for tap for oil drilling, its characterized in that, includes mud pipe (6), the cover is equipped with packing box (13) on mud pipe (6), the gooseneck of tap is connected through last seal assembly to the upper end of mud pipe (6), the terminal surface is connected with tap center tube through seal assembly down under the excircle of packing box (13), the upper end of packing box (13) makes through well seal assembly packing box (13) with mud pipe (6) realize pressurized seal.
2. The packing sealing structure of the petroleum drilling water faucet according to claim 1, wherein the upper sealing assembly comprises an upper nut (1) and an upper pressing ring (4), the upper nut (1) is in threaded connection with a gooseneck, the upper end part of the slurry pipe (6) is inserted into the upper pressing ring (4), and the upper pressing ring (4) is pressed and attached to the end face of the gooseneck by the upper nut (1).
3. The packing sealing structure of the petroleum drilling water tap is characterized in that a first ring groove and a second ring groove are respectively arranged on the upper end face and the inner hole of the upper pressing ring (4), and a first sealing ring (2) and a second sealing ring (5) are respectively arranged in the first ring groove and the second ring groove.
4. The packing sealing structure of the petroleum drilling water tap is characterized in that an inner spline tooth shape is further arranged on an inner hole of the upper pressure ring (4), an outer spline tooth shape and a steel wire check ring clamping groove are formed in the upper end of the slurry pipe (6), the outer spline tooth shape of the upper end of the slurry pipe (6) is inserted into the inner spline tooth groove of the upper pressure ring (4), and the steel wire check ring (3) is arranged in the steel wire check ring clamping groove of the slurry pipe (6).
5. The packing sealing structure of the petroleum drilling water tap according to claim 1, wherein the lower sealing assembly comprises a lower nut (15) and a lower pressing ring (16), the lower nut (15) is connected with a water tap central pipe through trapezoidal threads, a third ring groove and a fourth ring groove are respectively formed in the lower end face and the outer circular face of the lower pressing ring (16), and a third sealing ring (14) and a fourth sealing ring (17) are respectively correspondingly installed in the third ring groove and the fourth ring groove.
6. The packing sealing structure of the petroleum drilling water tap according to claim 5, wherein the lower end of the outer circle of the packing box (13) and the lower end of the inner end of the packing box are respectively provided with a step surface, and the lower nut (15) applies axial compression force on the step surface of the outer circle of the packing box (13) through screwing and transmits the axial compression force to the lower compression ring (16) through the step surface of the inner hole, so that the lower end surface of the lower compression ring is compressed on the end surface of the central pipe of the water tap.
7. The packing sealing structure of the petroleum drilling water tap according to claim 6, wherein the middle sealing assembly comprises a middle pressure ring (8) and a compression nut (7), the middle pressure ring (8) is sleeved on the outer circle of the slurry pipe (6), the outer circle of the middle pressure ring (8) is in matched contact with the inner circle of the packing box, the outer circle upper end of the packing box (13) is provided with an external thread, and the compression nut (7) is provided with an internal thread matched with the external thread and screwed on the packing box (13).
8. The packing sealing structure of the petroleum drilling water tap according to claim 7, wherein a packing ring (12) and a lining ring (11) are arranged in the packing box (13), a plurality of packing rings (10) are arranged between the medium-pressure ring (8) and the lower pressure ring (16), the lining ring (11) is arranged between adjacent packing rings, the packing ring (12) is arranged between the packing ring closest to the lower pressure ring (16) and the lower pressure ring (16),
Every the outer disc of backing ring (11) all sets up the fifth round groove, every install the fifth sealing washer in the fifth round groove, the sixth round groove is also established to the outer disc of backing ring (12), install the sixth sealing washer in the sixth round groove, gland nut (7) compress tightly middling pressure ring (8), packing (10), backing ring (11) in proper order through the screw thread screwing force with packing box (13) until the packing force acts on the interior step of packing box.
9. The packing sealing structure of the petroleum drilling water tap is characterized in that radial gaps are formed between the outer circle of the slurry pipe (6) and inner holes of the medium pressure ring (7), the lining ring (11), the lining ring (12) and the lower pressure ring (16), and axial gaps are formed among the medium pressure ring (8), the lining ring (11), the lining ring (12) and the lower pressure ring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520402475.7U CN223648533U (en) | 2025-03-07 | 2025-03-07 | A packing seal structure for a water tap in oil drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202520402475.7U CN223648533U (en) | 2025-03-07 | 2025-03-07 | A packing seal structure for a water tap in oil drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223648533U true CN223648533U (en) | 2025-12-09 |
Family
ID=97905168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202520402475.7U Active CN223648533U (en) | 2025-03-07 | 2025-03-07 | A packing seal structure for a water tap in oil drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223648533U (en) |
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2025
- 2025-03-07 CN CN202520402475.7U patent/CN223648533U/en active Active
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