CN211875102U - Combined sealing structure for top drive - Google Patents
Combined sealing structure for top drive Download PDFInfo
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- CN211875102U CN211875102U CN201922473978.0U CN201922473978U CN211875102U CN 211875102 U CN211875102 U CN 211875102U CN 201922473978 U CN201922473978 U CN 201922473978U CN 211875102 U CN211875102 U CN 211875102U
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- packing box
- umbrella
- seal
- main shaft
- top drive
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Abstract
The utility model discloses a top is driven and is used combined seal structure contains first mud umbrella, second mud umbrella and packing box, first mud umbrella is located second mud umbrella top, second mud umbrella below is equipped with the packing box, the packing box can be dismantled and connect the case lid, be equipped with rotary seal between packing box and the main shaft, form labyrinth seal between packing box and the second mud umbrella. By adopting the device, the drilling fluid can be effectively prevented from entering the rotary seal to cause the failure of the rotary seal through multiple combined sealing isolation, and then enters the gear box to cause the damage of a power system, the normal operation of the top drive is ensured, the service life of the equipment is greatly prolonged, a large amount of daily maintenance and repair time is saved, a large amount of operation and maintenance cost is saved, and the effectiveness of the operation of the drilling equipment is improved.
Description
Technical Field
The utility model relates to a drilling mechanical equipment technical field, in particular to top is driven and is used combined seal structure.
Background
A top driving force system or a power water faucet is a core component of a top drive, and a main shaft of the power system, a washpipe, a gooseneck, an internal blowout preventer and a protective joint provide a circulation channel for drilling fluid. The washpipe is located between the power system and the gooseneck, and rotary sealing of the main shaft is achieved, so that circulation of drilling fluid is achieved. A radial bearing is arranged between a box cover and a main shaft of the power system and bears the radial force of the main shaft, and rotary seals are arranged above and below the bearing. During drilling operation, the drilling fluid contains corrosive particles and the like, so that the flushing pipe is sealed and loses efficacy, mud leaks to a box cover of a power system, or a large amount of drilling fluid is scattered to the box cover of the power system when the flushing pipe is replaced. If the leaked drilling fluid cannot be cleaned in time, the drilling fluid enters the rotary seal to damage the rotary seal and the radial bearing, and the drilling fluid further enters the gearbox to cause damage to a power system.
In order to solve the problem, the prior art mostly adopts a mode of arranging a mud umbrella, but the mud umbrella is used for a long time or when the leakage amount of the drilling fluid is large, the drilling fluid still enters the rotary seal of the box cover.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the unable fundamentally of adoption mud umbrella structure among the prior art and solve the rotary seal that long-term use back drilling fluid still can get into the case lid, cause the above-mentioned not enough of driving system's damage, provide a top and drive and use combination seal structure.
In order to achieve the above object, the present invention provides the following technical solutions:
a composite seal structure for a top drive, comprising:
the inner hole of the first slurry umbrella is connected to the main shaft;
the second slurry umbrella is arranged below the first slurry umbrella, and an inner hole of the second slurry umbrella is in interference fit with the main shaft;
the packing box is arranged below the second slurry umbrella, the packing box is detachably connected with the box cover, a rotary seal is arranged between the packing box and the main shaft, and a labyrinth seal is formed between the packing box and the second slurry umbrella.
By adopting the combined sealing structure for the top drive, the first slurry umbrella is arranged below the second slurry umbrella, the packing box can be detachably connected with the box cover, the rotary seal is arranged between the packing box and the main shaft, the labyrinth seal is formed between the packing box and the second slurry umbrella, when a large amount of drilling fluid leaks, firstly the drilling fluid can be isolated by the first slurry umbrella and is thrown to the outer edge of the packing box under the action of centrifugal force and then overflows to the box cover, the residual drilling fluid on the top surface of the packing box is isolated by the labyrinth seal and can not enter the rotary seal, and if the inner hole of the first slurry umbrella generates a gap with the main shaft after long-term use, the infiltrated drilling fluid can be isolated by the second slurry umbrella and overflows along the upper surface of the second slurry umbrella, and finally overflows on the packing box and cannot enter the rotary seal. By adopting the device, the drilling fluid can be effectively prevented from entering the rotary seal to cause the failure of the rotary seal through multiple combined sealing isolation, and then enters the gear box to cause the damage of a power system, the normal operation of the top drive is ensured, the service life of the equipment is greatly prolonged, a large amount of daily maintenance and repair time is saved, a large amount of operation and maintenance cost is saved, and the effectiveness of the operation of the drilling equipment is improved.
Preferably, the inner ring of the box cover is provided with a boss, and the bottom surface of the packing box is connected with the top surface of the boss.
Further preferably, a sealing ring is arranged between the packing box and the boss.
Further preferably, a sealing groove is formed in the bottom surface of the packing box and used for arranging the sealing ring.
Drilling fluid on the case cover is further prevented from entering the rotary seal through the bottom surface of the packing box.
Further preferably, the labyrinth seal is formed between the top surface of the packing box and the bottom surface of the second slurry umbrella.
Preferably, the main shaft is provided with a groove, the first slurry umbrella is an elastic component, and an inner hole of the first slurry umbrella is provided with a flange which is connected with the groove in a matching manner.
When the mud umbrella is installed, the flange is installed in the groove of the main shaft by utilizing the deformation of the elastic component, so that the main shaft is held tightly, and the drilling fluid is further prevented from permeating along the inner hole of the first mud umbrella.
Further preferably, a shaft sleeve is arranged on the main shaft, and the rotary seal is arranged between the shaft sleeve and the packing box.
To sum up, compare with prior art, the beneficial effects of the utility model are that:
1. adopt a top drive and use combination seal structure, keep apart through multiple combination seal and can effectively prevent that the drilling fluid from getting into rotary seal and leading to its inefficacy, and then get into the gear box and cause driving system's damage, guaranteed the normal operating that the top was driven, improved the life of equipment widely, practiced thrift a large amount of routine maintenance and repair time, saved a large amount of operation maintenance costs, improved drilling equipment moving validity.
Description of the drawings:
fig. 1 is a schematic structural view of a combined sealing structure for top drive according to the present invention;
fig. 2 is a sectional view showing the packing box according to embodiment 1;
FIG. 3 is a structural sectional view of a first slurry umbrella in embodiment 1;
fig. 4 is a structural sectional view of a second slurry umbrella in embodiment 1.
The labels in the figure are: 11-a first slurry umbrella, 12-a second slurry umbrella, 2-a main shaft, 21-a shaft sleeve, 3-a packing box, 31-a sealing groove, 4-a box cover and 5-a rotary seal.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, the utility model discloses a top is driven and is used combination seal structure, contain:
the inner hole of the first slurry umbrella 11 is connected to the main shaft 2;
the second slurry umbrella 12 is arranged below the first slurry umbrella 11, and an inner hole of the second slurry umbrella 12 is in interference fit with the main shaft 2;
A radial bearing is arranged between the main shaft 2 and the box cover 4, the main shaft 2 extends out of the box cover 4 to be connected with a washing pipe of a top drive, a first slurry umbrella 11, a second slurry umbrella 12 and a packing box 3 are arranged along the main shaft 2 from top to bottom, the first slurry umbrella 11 is an elastic component, such as a silicone member, exemplified in this embodiment as an umbrella-shaped rubber member, see fig. 3, the inner bore of the first slurry umbrella 11 has a flange, the main shaft 2 is provided with a groove, the flange is connected with the groove in an adaptive manner, the first slurry umbrella 11 is convenient to hold the main shaft 2 tightly by using the deformation of rubber during installation, when a large amount of drilling fluid leaks, the drilling fluid can be firstly isolated by the first mud umbrella 11, is thrown to the outer edge of the packing box 3 under the action of centrifugal force, and then overflows on the box cover 4 to prevent the drilling fluid from permeating along the inner hole of the rubber umbrella.
The second mud umbrella 12 is a disc-shaped metal component, as shown in fig. 4, an inner hole of the second mud umbrella 12 is in interference fit with the main shaft 2, an inner ring of the bottom surface of the second mud umbrella 12 abuts against the shaft sleeve 21 of the main shaft 2, the rotary seal 5 is arranged between the shaft sleeve 21 and the packing box 3, and after long-term use, if a gap is formed between the inner hole of the first mud umbrella 11 and the main shaft 2, drilling fluid permeating from the inner hole of the first mud umbrella 11 can be blocked by the second mud umbrella 12, cannot permeate along the inner hole of the second mud umbrella 12, can only overflow along the upper surface of the second mud umbrella 12, and finally overflows on the packing box 3.
The labyrinth seal is formed between the outer ring of the bottom surface of the second mud umbrella 12 and the inner ring of the top surface of the packing box 3, and the residual drilling fluid on the top surface of the packing box 3 is blocked by the labyrinth seal and cannot enter the rotary seal 5.
The top surface inner circle of case lid 4 is equipped with the boss, 3 bolted connection of packing box in the boss, 3 bottom surfaces of packing box are equipped with seal groove 31, seal groove 31 is used for setting up O type sealing washer (not shown in the figure), effectively prevents that the overflow is in drilling fluid on the case lid 4 passes through 3 bottom surfaces of packing box get into rotary seal 5.
The device can effectively prevent drilling fluid from entering the rotary seal to cause failure through multiple combined sealing isolation, further enter the gear box to cause damage to a power system, ensure normal operation of the top drive, greatly prolong the service life of equipment, save a large amount of daily maintenance and repair time, save a large amount of operation and maintenance cost and improve the effectiveness of operation of drilling equipment.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A combined sealing structure for top drive, comprising:
the inner hole of the first slurry umbrella (11) is connected to the main shaft (2);
the second slurry umbrella (12) is arranged below the first slurry umbrella (11), and an inner hole of the second slurry umbrella (12) is in interference fit with the main shaft (2);
packing box (3) is located second mud umbrella (12) below, packing box (3) can be dismantled and connect case lid (4), be equipped with rotary seal (5) between packing box (3) and main shaft (2), form labyrinth seal between packing box (3) and second mud umbrella (12).
2. The combined seal structure for the top drive according to claim 1, wherein the inner ring of the box cover (4) is provided with a boss, and the bottom surface of the packing box (3) is connected with the top surface of the boss.
3. The combined seal structure for the top drive according to claim 2, wherein a seal ring is arranged between the packing box (3) and the boss.
4. The combined sealing structure for the top drive according to claim 3, characterized in that a sealing groove (31) is formed in the bottom surface of the packing box (3), and the sealing groove (31) is used for arranging the sealing ring.
5. The combined seal structure for the top drive according to claim 4, characterized in that the labyrinth seal is formed between the top surface of the packing box (3) and the bottom surface of the second slurry umbrella (12).
6. A top drive combination seal structure according to any one of claims 1 to 5, characterized in that the main shaft (2) is provided with a groove, the first slurry umbrella (11) is an elastic member, and the inner hole of the first slurry umbrella (11) is provided with a flange which is matched and connected with the groove.
7. The combined seal structure for the top drive according to claim 6, wherein a shaft sleeve (21) is arranged on the main shaft (2), and the rotary seal (5) is arranged between the shaft sleeve (21) and the packing box (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922473978.0U CN211875102U (en) | 2019-12-31 | 2019-12-31 | Combined sealing structure for top drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922473978.0U CN211875102U (en) | 2019-12-31 | 2019-12-31 | Combined sealing structure for top drive |
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| Publication Number | Publication Date |
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| CN211875102U true CN211875102U (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922473978.0U Active CN211875102U (en) | 2019-12-31 | 2019-12-31 | Combined sealing structure for top drive |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124162A (en) * | 2019-12-31 | 2021-07-16 | 四川宏华石油设备有限公司 | Combined sealing structure for top drive |
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2019
- 2019-12-31 CN CN201922473978.0U patent/CN211875102U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113124162A (en) * | 2019-12-31 | 2021-07-16 | 四川宏华石油设备有限公司 | Combined sealing structure for top drive |
| CN113124162B (en) * | 2019-12-31 | 2024-04-09 | 四川宏华石油设备有限公司 | Combined sealing structure for top drive |
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