CN117948077B - Rotary assembly sealing device of rotary blowout preventer - Google Patents
Rotary assembly sealing device of rotary blowout preventer Download PDFInfo
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- CN117948077B CN117948077B CN202410355644.6A CN202410355644A CN117948077B CN 117948077 B CN117948077 B CN 117948077B CN 202410355644 A CN202410355644 A CN 202410355644A CN 117948077 B CN117948077 B CN 117948077B
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- 238000007789 sealing Methods 0.000 title claims abstract description 204
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 150
- 239000000498 cooling water Substances 0.000 claims abstract description 66
- 238000004513 sizing Methods 0.000 claims description 16
- 238000005299 abrasion Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims 3
- 238000001764 infiltration Methods 0.000 claims 3
- 239000003921 oil Substances 0.000 abstract description 109
- 239000010687 lubricating oil Substances 0.000 abstract description 21
- 238000010073 coating (rubber) Methods 0.000 description 13
- 230000002035 prolonged effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000008358 core component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/08—Wipers; Oil savers
- E21B33/085—Rotatable packing means, e.g. rotating blow-out preventers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a rotary assembly sealing device of a rotary blowout preventer, which comprises a shell, wherein the upper end of the shell is connected with a rubber core assembly, the lower end of the shell is connected with a rubber core assembly, a water sealing cavity and an oil sealing cavity are arranged in the shell, the water sealing cavity is arranged above the oil sealing cavity, a bearing is arranged between the water sealing cavity and the oil sealing cavity, an upper water sealing ring and a lower water sealing ring are arranged in the water sealing cavity, and an upper oil sealing ring and a lower oil sealing ring are arranged in the oil sealing cavity. The invention provides a rotary assembly sealing device of a rotary blowout preventer, which reduces the temperature of friction generated by rotation through circulating cooling water in a water sealing cavity, prolongs the service life of the rotary blowout preventer, and simultaneously double seals lubricating oil of a bearing and improves sealing performance.
Description
Technical Field
The invention relates to the field of rotary blowout preventers, in particular to a rotary assembly sealing device of a rotary blowout preventer.
Background
The rotary blowout preventer is used for realizing the shunt effect when in pressurized drilling operation such as an underbalanced drilling process, the hydraulic blowout preventer, the drilling tool check valve and the snubbing tripping pressurizing device are matched for use, so that the pressurized drilling operation and snubbing tripping operation can be safely performed, and the hydraulic blowout preventer has important effects on releasing and protecting a pressurized oil reservoir.
In the prior art, as a large-drift-diameter single-double quick-change rotary blowout preventer assembly disclosed in Chinese published patent CN 212296295U, the connection mode of a sizing core sealing gland and a sizing core shell is improved, the existing thread and bolt connection mode is improved into a concave-convex clamping groove connection mode, thread back-off or sliding threads cannot be caused due to vibration in use, and the sealing performance of the upper sizing core and the shell is ensured to be always safe. However, in the prior art, the friction temperature generated by the rotating assembly and the sealing device thereof is higher during rotation, the service life of the rotating blowout preventer is influenced, and the sealing performance of the single-layer sealing ring in the prior art is insufficient.
Disclosure of Invention
The invention aims to provide a rotary assembly sealing device of a rotary blowout preventer, which solves the problems that the service life of the rotary blowout preventer is influenced and the sealing performance of a single-layer sealing ring is insufficient due to higher friction temperature generated during rotation in the prior art.
A rotary assembly seal apparatus for a rotary blowout preventer, comprising:
The shell, the rubberizing core subassembly is connected to the shell upper end, the rubberizing core subassembly is connected to the shell lower extreme, set up water seal cavity and oil seal cavity in the shell, water seal cavity is in the top of oil seal cavity, be provided with the bearing between water seal cavity and the oil seal cavity, be provided with upper portion water seal ring and lower part water seal ring in the water seal cavity, be provided with upper portion oil seal ring and lower part oil seal ring in the oil seal cavity.
Preferably, a central tube is arranged inside the shell, an anti-abrasion bushing is sleeved outside the central tube, and the upper water sealing ring, the lower water sealing ring, the upper oil sealing ring and the lower oil sealing ring are arranged outside the anti-abrasion bushing.
Preferably, the inner side of the water seal cavity is provided with a cooling water tank, the cooling water tank is connected with a cooling water inlet and a cooling water outlet, an upper water seal groove is arranged above the cooling water tank, a lower water seal groove is arranged below the cooling water tank, an upper water seal ring is arranged in the upper water seal groove, a lower water seal ring is arranged in the lower water seal groove, and the upper water seal ring and the lower water seal ring are clung to an anti-abrasion bushing to enable the cooling water tank to form a closed space. The cooling water inlet and the cooling water outlet are externally connected with a cooling water device, cooling water enters from the cooling water inlet, flows out from the cooling water outlet to form cooling water circulation, cools the water sealing cavity, seals the cooling water tank by the upper water sealing ring and the lower water sealing ring, prevents cooling water leakage, cools down and cools down the upper water sealing ring and the lower water sealing ring simultaneously, and prolongs the sealing service life.
Preferably, the outer side surface of the upper water sealing ring is provided with a first groove and embedded with an O-shaped rubber sealing ring, the inner side surface of the upper water sealing ring is provided with a first conical surface, the lower end surface of the upper water sealing ring is provided with a first elliptic spring groove, and a first oblique round spring is arranged in the first elliptic spring groove.
Further preferably, the first oblique round spring is embedded in the oblique round spring groove in an end-to-end mode. The oblique round spring has the characteristics of high elasticity and high elastic recovery capability, can play a supporting role on the upper water sealing ring, improves the sealing performance of the upper water sealing ring, and prolongs the service life of the upper water sealing ring.
Further preferably, the first conical surface extends from the bottom surface of the upper water sealing ring, the height is not more than half of the height of the upper water sealing ring, and the diameter of the first conical surface gradually decreases from top to bottom. The first conical surface can enable the sealing ring to be attached to the anti-abrasion bushing better, and the sealing performance of the upper water sealing ring is improved.
Further preferably, the first groove is on the outer side surface and has a height not exceeding the height of the first conical surface. The first groove is embedded with the O-shaped rubber sealing ring, so that the outer side face of the upper water sealing ring is better attached to the water sealing cavity, the sealing performance is improved, meanwhile, the stress during rotation is relieved, and the service life of the upper water sealing ring is prolonged.
Preferably, the outer side surface of the lower water sealing ring is provided with a second groove and embedded with an O-shaped rubber sealing ring, a conical copper ring is arranged at the intersection of the upper end surface and the inner side surface of the lower water sealing ring, the inner side surface of the lower water sealing ring is provided with a second conical surface, the lower end surface of the lower water sealing ring is provided with a second elliptical spring groove, a second inclined circular spring is arranged in the second elliptical spring groove, and a boss extends outwards from the lower end surface of the lower water sealing ring. Because the upper end face and the inner side face of the lower water sealing ring are worn most seriously in the rotating process, a copper ring is arranged at the intersection of the upper end face and the inner side face of the lower water sealing ring, so that the abrasion of the sealing ring can be reduced, the service life of the sealing ring is prolonged, and meanwhile, the copper ring is cooled by cooling water, so that the friction heating of the copper ring is reduced.
Further preferably, the second conical surface and the second oblique circular spring have the same function and principle as the first conical surface and the first oblique circular spring. Further preferably, the second groove is provided in the center of the outer side surface of the lower water seal ring. And the combined action of the second conical surface, the second oblique circular spring, the second groove and the boss improves the performance of cooling water sealing.
Preferably, an upper oil seal groove and a lower oil seal groove are formed in the inner side surface of the oil seal cavity, the upper oil seal ring is installed in the upper oil seal groove, and the lower oil seal ring is installed in the lower oil seal groove.
Preferably, the outer side of the upper oil sealing ring is provided with a third groove and embedded with an O-shaped rubber sealing ring, the inner side of the upper oil sealing ring is provided with a third conical surface, the lower end surface of the upper oil sealing ring is provided with a third elliptical spring groove, a third oblique circular spring is arranged in the third elliptical spring groove, the inner side of the upper oil sealing ring is provided with a plurality of first conical seepage grooves uniformly distributed along the central circumference of the upper oil sealing ring, the first conical seepage grooves extend downwards along the inner side from the upper end surface of the upper oil sealing ring, the length is greater than half of the height of the upper oil sealing ring, and the cross section diameter of the first conical seepage grooves gradually decreases from top to bottom. The viscosity of the lubricating oil of the bearing is larger, the axial stress generated to the sealing ring is higher, the conical seepage groove is arranged to effectively relieve the stress of the upper oil sealing ring, the sealing performance of the upper oil sealing ring is improved, the bearing of larger rotary dynamic sealing pressure and rotary static sealing pressure is realized, the friction force between the upper oil sealing ring and the wear-resistant bushing is reduced, and the service life of the upper oil sealing ring is prolonged.
Preferably, the outer side of the lower oil sealing ring is provided with a fourth groove and embedded with an O-shaped rubber sealing ring, the inner side of the upper oil sealing ring is provided with a fourth conical surface, the lower end surface of the lower oil sealing ring is provided with a fourth elliptical spring groove, a fourth oblique circular spring is arranged in the fourth elliptical spring groove, the inner side of the lower oil sealing ring is provided with a plurality of second conical seepage grooves uniformly distributed along the center circumference of the lower oil sealing ring, the second conical seepage grooves extend downwards along the inner side from the upper end surface of the lower oil sealing ring, the length is not more than half of the height of the lower oil sealing ring, and the cross section diameter of the second conical seepage grooves gradually decreases from top to bottom. Because the upper oil seal ring is in direct contact with the lubricating oil of the bearing, the stress ratio is larger, and the oil pressure of the lower oil seal ring is smaller, the height of the lower conical seepage groove is smaller than that of the upper conical seepage groove. By double sealing of the upper oil seal ring and the lower oil seal ring, leakage of lubricating oil of the bearing can be effectively prevented.
Preferably, the rubberizing core subassembly includes a rubberizing core section of thick bamboo, a rubberizing core joint gland, a rubberizing core joint and a rubberizing core, the bottom and the shell fixed connection of a rubberizing core section of thick bamboo, the upper end and the rubberizing core joint gland of a rubberizing core section of thick bamboo are connected, a rubberizing core joint is connected with a rubberizing core joint gland in a rubberizing core section of thick bamboo inside, a rubberizing core joint's bottom and a rubberizing core fixed connection.
Preferably, the lower rubber core assembly comprises a lower rubber core joint and a lower rubber core, wherein the upper end of the lower rubber core joint is fixedly connected with the bottom end of the shell, and the bottom end of the lower rubber core joint is fixedly connected with the lower rubber core.
The beneficial effects are that:
1. The invention provides a rotary assembly sealing device of a rotary blowout preventer, which reduces the temperature of friction generated by rotation through circulating cooling water in a water sealing cavity, prolongs the service life of the rotary blowout preventer, and simultaneously double seals lubricating oil of a bearing and improves sealing performance.
2. In the prior art, the rotary blowout preventer generates larger friction in the rotating process, so that higher heat is generated, and the service life of the rotary blowout preventer is influenced. According to the invention, the water sealing cavity is arranged, and the circulating cooling water is connected outside the water sealing cavity, so that the lubricating oil of the bearing can be cooled, the friction resistance is reduced, the service life of the rotary blowout preventer is prolonged, the heat of the lubricating oil can be circularly taken away and discharged, and sintering is prevented. The circulating cooling water needs to seal the cooling water in the circulating process, so that the effect of lubricating oil is prevented from being influenced by the cooling water leaked to the bearing. Therefore, the cooling water tank is sealed through the upper water sealing ring and the lower water sealing ring, so that the cooling water is prevented from leaking, meanwhile, the cooling water can cool the upper water sealing ring and the lower water sealing ring, and the service lives of the upper water sealing ring and the lower water sealing ring are prolonged.
3. The upper water sealing ring and the lower water sealing ring are different in position and slightly different in structure, the outer side surface of the upper water sealing ring is provided with a first groove and embedded with an O-shaped rubber sealing ring, the inner side surface is provided with a first conical surface, the lower end surface is provided with a first elliptic spring groove, and a first oblique round spring is arranged in the first elliptic spring groove. The first oblique round spring plays a supporting role on the upper water sealing ring, improves the sealing performance of the upper water sealing ring, and prolongs the service life of the upper water sealing ring. The first conical surface enables the sealing ring to be better attached to the anti-abrasion bushing, and the sealing performance of the upper water sealing ring is improved. The first groove can enable the outer side face of the upper water seal ring to be better attached to the water seal cavity, so that the sealing performance is improved, meanwhile, the stress during rotation is relieved, and the service life of the upper water seal ring is prolonged. The combined action of the first conical surface, the first oblique round spring and the first groove enables the upper water sealing ring to be better attached to the anti-abrasion bushing and the water sealing cavity, improves the sealing performance of cooling water, effectively relieves the stress generated during rotation, and prolongs the service life of the upper water sealing ring. The lower water sealing ring is similar to the upper water sealing ring, but the abrasion of the intersection of the upper end surface and the inner side surface of the lower water sealing ring is most serious in the rotating process of the rotary sealing of the blowout preventer, so that the copper ring is arranged at the intersection of the upper end surface and the inner side surface of the lower water sealing ring, the abrasion of the sealing ring can be reduced, the service life of the sealing ring is prolonged, and meanwhile, the copper ring is cooled by cooling water, so that the friction heating of the copper ring is reduced.
4. The single-layer seal ring has insufficient sealing property to bearing lubricating oil, and the lubricating oil is easy to leak. According to the invention, the double-layer sealing structure of the upper oil sealing ring and the lower oil sealing ring is arranged, the viscosity of bearing lubricating oil is higher, the stress generated on the sealing ring is higher in the rotating process, and the first conical seepage groove is arranged, so that the stress of the upper oil sealing ring can be effectively relieved, the sealing performance of the upper oil sealing ring is improved, the friction force between the upper oil sealing ring and the wear-resistant bushing is reduced, and the service life of the upper oil sealing ring is prolonged. The upper oil seal ring is in direct contact with the lubricating oil of the bearing, so that the stress ratio is high, and the oil pressure of the lower oil seal ring is low, so that the height of the second conical seepage groove is smaller than that of the first conical seepage groove. Through the double seal of upper portion oil seal ring and lower part oil seal ring, can effectively prevent the lubricating oil leakage of bearing, bear bigger rotation dynamic seal pressure and rotation static seal pressure simultaneously.
5. The first oblique round spring, the second oblique round spring and the fourth oblique round spring are oblique round springs, the elasticity of the oblique round springs is high, the elastic recovery capability is high, and the sealing device has high axial pretightening force when in sealing rotation and can improve sealing performance.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of a rotary assembly seal assembly of a rotary blowout preventer provided by the present invention.
FIG. 2 is an enlarged cross-sectional view of one embodiment of a rotary assembly seal assembly of a rotary blowout preventer provided by the present invention.
FIG. 3 is an enlarged view of a portion of a water seal cavity of an embodiment of a rotary assembly seal device of a rotary blowout preventer provided by the present invention.
FIG. 4 is an enlarged view of a portion of an oil seal cavity of an embodiment of a rotary assembly seal device for a rotary blowout preventer provided by the present invention.
FIG. 5 is a schematic view of an upper water seal ring of an embodiment of a rotary assembly seal device for a rotary blowout preventer provided by the present invention.
FIG. 6 is a schematic view of a lower water seal ring of an embodiment of a rotary assembly seal device for a rotary blowout preventer provided by the present invention.
FIG. 7 is a schematic diagram of an upper oil seal ring of an embodiment of a rotary assembly seal device for a rotary blowout preventer provided by the present invention.
FIG. 8 is a schematic diagram of a lower oil seal ring configuration of an embodiment of a rotary assembly seal device for a rotary blowout preventer provided by the present invention.
In the figure, 1-shell, 11-central tube, 12-wear-resistant bushing, 2-upper rubber core component, 21-upper rubber core barrel, 22-upper rubber core joint gland, 23-upper rubber core joint, 24-upper rubber core, 3-lower rubber core component, 31-lower rubber core joint, 32-lower rubber core, 4-water seal cavity, 41-cooling water tank, 42-cooling water inlet, 43-cooling water outlet, 44-upper water seal groove, 45-lower water seal groove, 5-oil seal cavity, 51-first oil seal groove, 52-second oil seal groove, 6-bearing, 7-upper water seal ring, 71-first groove, 72-first conical surface, 73-first elliptical spring groove, 74-first oblique circular spring, 8-lower water seal ring, 81-second groove, 82-second conical surface, 83-second elliptical spring groove, 84-second oblique circular spring, 85-boss, 86-copper ring, 9-upper oil seal ring, 91-third groove, 92-third conical surface, 93-third elliptical spring groove, 94-third oblique circular spring, 95-first conical seepage groove, 10-lower oil seal ring, 101-fourth groove, 102-fourth conical surface, 103-fourth elliptical spring groove, 104-fourth oblique circular spring, 105-second conical seepage groove.
Detailed Description
The contents of the present invention can be more easily understood by referring to the following detailed description of preferred embodiments of the present invention and examples included. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, definitions, will control.
Example 1:
The invention provides a rotary assembly sealing device of a rotary blowout preventer, which reduces the temperature of friction generated by rotation through circulating cooling water in a water sealing cavity, prolongs the service life of the rotary blowout preventer, and simultaneously double seals lubricating oil of a bearing and improves sealing performance.
The present invention, as shown in fig. 1-6, provides a rotary assembly seal for a rotary blowout preventer, comprising:
the upper end of the shell 1 is connected with the upper rubber core assembly 2, the lower end of the shell 1 is connected with the lower rubber core assembly 3, a water seal cavity 4 and an oil seal cavity 5 are arranged in the shell 1, the water seal cavity 4 is arranged above the oil seal cavity 5, a bearing 6 is arranged between the water seal cavity 4 and the oil seal cavity 5, an upper water seal ring 7 and a lower water seal ring 8 are arranged in the water seal cavity 4, the upper water seal ring 7 is arranged above the lower water seal ring 8, an upper oil seal ring 9 and a lower oil seal ring 10 are arranged in the oil seal cavity 5, and the upper oil seal ring 9 is arranged above the lower oil seal ring 10. The inside center tube 11 that is provided with of shell 1, center tube 11 outside cover have wear-resisting bush 12, and water seal cavity 4 and oil seal cavity 5 cover are in wear-resisting bush 12 outside.
The inner side of the water seal cavity 4 is provided with a cooling water tank 41, the cooling water tank 41 is connected with a cooling water inlet 42 and a cooling water outlet 43, an upper water seal groove 44 is arranged above the cooling water tank 41, a lower water seal groove 45 is arranged below the cooling water tank 41, the upper water seal ring 7 is installed in the upper water seal groove 44, the lower water seal ring 8 is installed in the lower water seal groove 45, and the upper water seal ring 7 and the lower water seal ring 8 are tightly attached to the wear-resistant bushing 12 so that the cooling water tank 41 forms a closed space. The cooling water inlet 42 and the cooling water outlet 43 are externally connected with a cooling water device, cooling water enters from the cooling water inlet 42, flows out from the cooling water outlet 43 to form a cooling water circulation, cools the water sealing cavity 4, and seals the cooling water tank 41 by the upper water sealing ring 7 and the lower water sealing ring 8 to prevent the cooling water from leaking.
The outer side surface of the upper water sealing ring 7 is provided with a first groove 71 and embedded with an O-shaped rubber sealing ring, the inner side surface of the upper water sealing ring 7 is provided with a first conical surface 72, the lower end surface of the upper water sealing ring 7 is provided with a first elliptical spring groove 73, and a first oblique circular spring 74 is arranged in the first elliptical spring groove 73. The first canted round spring 74 is nested end-to-end within the first elliptical spring slot 73. The first tapered surface 72 extends from the bottom surface of the upper water seal ring 7, and the height is not more than half the height of the upper water seal ring 7, and the diameter of the first tapered surface 72 gradually decreases from top to bottom. The first groove 71 is on the outer side surface and has a height not exceeding the height of the first tapered surface 72. The first groove 71 can enable the outer side face of the upper water seal ring 7 to be better attached to the water seal cavity 4, so that the sealing performance is improved, meanwhile, the stress during rotation is relieved, and the service life of the upper water seal ring 7 is prolonged. The bottom surface of the upper water sealing ring 7 is provided with a plurality of circumferentially uniformly distributed positioning holes for positioning the upper water sealing ring 7.
The outer side of lower water seal ring 8 is provided with second slot 81 and inlays O shape rubber seal, and the up end of lower water seal ring 8 and medial surface intersection department are provided with conical copper circle 86, and the medial surface of lower water seal ring 8 is provided with second conical surface 82, and the lower terminal surface of lower water seal ring 8 is provided with second oval spring groove 83, is provided with second oblique round spring 84 in the second oval spring groove 83, and the lower terminal surface of lower water seal ring 8 outwards extends has boss 85. The second groove 81 is provided in the center of the outer side of the lower water seal ring 8. The second tapered surface 82 and the second canted round spring 84 function and are the same as the first tapered surface 72 and the first canted round spring 74. The second conical surface 82, the second oblique circular spring 84, the second groove 81 and the boss 85 cooperate to improve the performance of cooling water sealing.
An upper oil seal groove 51 and a lower oil seal groove 52 are provided on the inner side surface of the oil seal chamber 5, the upper oil seal groove 51 is above the lower oil seal groove 52, the upper oil seal ring 9 is installed in the upper oil seal groove 51, and the lower oil seal ring 10 is installed in the lower oil seal groove 52.
The outer side of upper portion oil seal ring 9 is provided with third slot 91 and inlays O shape rubber seal, the medial surface of upper portion oil seal ring 9 is provided with third conical surface 92, the lower terminal surface of upper portion oil seal ring 9 is provided with third oval spring groove 93, be provided with third oblique round spring 94 in the third oval spring groove 93, the medial surface of third oblique round spring 94 is provided with a plurality of first toper seepage groove 95 of evenly distributed along upper portion oil seal ring 9 central circumference, first toper seepage groove 95 extends downwards along the medial surface from the up end of upper portion oil seal ring 9, the length is greater than half of upper portion oil seal ring 9 height, and the cross section diameter of first toper seepage groove 95 from top to bottom reduces gradually. The viscosity of the lubricating oil of the bearing 6 is larger, the stress generated to the sealing ring is higher, the first conical seepage groove 95 is arranged to effectively relieve the stress of the upper oil sealing ring 9, the sealing performance of the upper oil sealing ring 9 is improved, the friction force between the upper oil sealing ring 9 and the anti-abrasion bushing 12 is reduced, and the service life of the upper oil sealing ring 9 is prolonged. The bottom surface of the upper oil seal ring 9 is provided with 12 circumferentially evenly distributed positioning holes for positioning the upper oil seal ring 9.
The outer side of the lower oil seal ring 10 is provided with a fourth groove 101 and is embedded with an O-shaped rubber seal ring, the inner side of the upper oil seal ring 9 is provided with a fourth conical surface 102, the lower end surface of the lower oil seal ring 10 is provided with a fourth elliptical spring groove 103, a fourth oblique circular spring 104 is arranged in the fourth elliptical spring groove 103, the inner side of the fourth oblique circular spring 104 is provided with a plurality of second conical seepage grooves 105 uniformly distributed along the central circumference of the lower oil seal ring 10, the second conical seepage grooves 105 extend downwards along the inner side from the upper end surface of the lower oil seal ring 10, the height is not more than half of the height of the lower oil seal ring 10, and the cross section diameter of the second conical seepage grooves 105 is gradually reduced from top to bottom. Since the upper oil seal ring 9 is in direct contact with the lubricating oil of the bearing 6, the stress ratio is large, and the oil pressure of the lower oil seal ring 10 is small, the height of the second conical seepage groove 105 is smaller than that of the first conical seepage groove 95. By double sealing of the upper oil seal ring 9 and the lower oil seal ring 10, leakage of lubricating oil of the bearing 6 can be effectively prevented. The bottom surface of the lower oil seal ring 10 is provided with 12 circumferentially uniformly distributed positioning holes for positioning the lower oil seal ring 10.
The rubber coating core assembly 2 comprises a rubber coating core barrel 21, a rubber coating core joint gland 22, a rubber coating core joint 23 and a rubber coating core 24, wherein the bottom end of the rubber coating core barrel 21 is fixedly connected with the shell 1, the upper end of the rubber coating core barrel 21 is connected with the rubber coating core joint gland 22, the rubber coating core joint 23 is connected with the rubber coating core joint gland 22 in the rubber coating core barrel 21, and the bottom end of the rubber coating core joint 23 is fixedly connected with the rubber coating core 24.
The lower rubber core assembly 3 comprises a lower rubber core joint 31 and a lower rubber core 32, wherein the upper end of the lower rubber core joint 31 is fixedly connected with the bottom end of the shell 1, and the bottom end of the lower rubber core joint 31 is fixedly connected with the lower rubber core 32.
Working principle: the anti-abrasion bushing 12 and the central tube 11 rotate in the bearing 6, the highest rotating speed can reach 100r/min, when the anti-abrasion bushing rotates, lubricating oil in the bearing 6 can generate a large amount of heat, the cooling water inlet 42 and the cooling water outlet 43 of the water sealing cavity 4 are externally connected with a cooling water device, cooling water enters from the cooling water inlet 42 and flows out from the cooling water outlet 43 to form cooling water circulation, the water sealing cavity 4 is cooled, and accordingly lubricating oil is cooled, and the upper water sealing ring 7 and the lower water sealing ring 8 seal the cooling water tank 41 to prevent cooling water leakage. When in rotation, the lubricating oil of the bearing 6 passes through the upper oil seal ring 9 and the lower oil seal ring 10 to be sealed, so that the lubricating oil is prevented from leaking, and can bear larger pressure, the highest rotary dynamic seal pressure is 17.5MPa, and the highest static seal pressure is 35MPa.
Claims (4)
1. A rotary assembly seal apparatus for a rotary blowout preventer, comprising: the upper end of the shell is connected with the rubber core assembly, the lower end of the shell is connected with the lower rubber core assembly, a water sealing cavity and an oil sealing cavity are arranged in the shell, the water sealing cavity is arranged above the oil sealing cavity, a bearing is arranged between the water sealing cavity and the oil sealing cavity, an upper water sealing ring and a lower water sealing ring are arranged in the water sealing cavity, and an upper oil sealing ring and a lower oil sealing ring are arranged in the oil sealing cavity;
The inner side surface of the water sealing cavity is provided with a cooling water tank, the cooling water tank is connected with a cooling water inlet and a cooling water outlet, an upper water sealing groove is arranged above the cooling water tank, a lower water sealing groove is arranged below the cooling water tank, an upper water sealing ring is arranged in the upper water sealing groove, a lower water sealing ring is arranged in the lower water sealing groove, and the upper water sealing ring and the lower water sealing ring are tightly attached to an anti-abrasion bushing so that the cooling water tank forms a closed space;
The outer side surface of the upper water sealing ring is provided with a first groove and embedded with an O-shaped rubber sealing ring, the inner side surface of the upper water sealing ring is provided with a first conical surface, the lower end surface of the upper water sealing ring is provided with a first elliptical spring groove, and a first oblique circular spring is arranged in the first elliptical spring groove;
The outer side surface of the lower water sealing ring is provided with a second groove and embedded with an O-shaped rubber sealing ring, a conical copper ring is arranged at the intersection of the upper end surface and the inner side surface of the lower water sealing ring, the inner side surface of the lower water sealing ring is provided with a second conical surface, the lower end surface of the lower water sealing ring is provided with a second elliptical spring groove, a second oblique circular spring is arranged in the second elliptical spring groove, and a boss extends outwards from the lower end surface of the lower water sealing ring;
An upper oil seal groove and a lower oil seal groove are formed in the inner side surface of the oil seal cavity, the upper oil seal ring is installed in the upper oil seal groove, and the lower oil seal ring is installed in the lower oil seal groove;
The outer side surface of the upper oil sealing ring is provided with a third groove and embedded with an O-shaped rubber sealing ring, the inner side surface of the upper oil sealing ring is provided with a third conical surface, the lower end surface of the upper oil sealing ring is provided with a third elliptical spring groove, a third oblique circular spring is arranged in the third elliptical spring groove, the inner side surface of the upper oil sealing ring is provided with a plurality of first conical seepage grooves uniformly distributed along the central circumference of the upper oil sealing ring, the first conical seepage grooves extend downwards along the inner side surface from the upper end surface of the upper oil sealing ring, the length is greater than half of the height of the upper oil sealing ring, and the cross section diameter of the first conical seepage grooves gradually decreases from top to bottom;
The outer side of lower part oil seal ring is provided with the fourth slot and inlays O shape rubber seal, the medial surface of upper portion oil seal ring is provided with the fourth conical surface, the lower terminal surface of lower part oil seal ring is provided with the fourth oval spring groove, be provided with the fourth oblique round spring in the fourth oval spring groove, the medial surface of lower part oil seal ring is provided with a plurality of second cone infiltration groove along lower part oil seal ring center circumference equipartition distribution, second cone infiltration groove extends downwards along the medial surface from the up end of lower part oil seal ring, and length is not more than half of lower part oil seal ring height, and the cross section diameter of second cone infiltration groove from top to bottom reduces gradually.
2. The rotary assembly seal of claim 1, wherein a center tube is disposed within the housing, an anti-wear bushing is sleeved outside the center tube, and the upper water seal ring, the lower water seal ring, the upper oil seal ring, and the lower oil seal ring are outside the anti-wear bushing.
3. The rotary assembly sealing device of the rotary blowout preventer of claim 1, wherein the sizing core assembly comprises a sizing core barrel, a sizing core joint gland, a sizing core joint and a sizing core, the bottom end of the sizing core barrel is fixedly connected with the housing, the upper end of the sizing core barrel is connected with the sizing core joint gland, the sizing core joint is connected with the sizing core joint gland inside the sizing core barrel, and the bottom end of the sizing core joint is fixedly connected with the sizing core.
4. The rotary assembly sealing device of the rotary blowout preventer of claim 1, wherein the lower core assembly comprises a lower core joint and a lower core, the upper end of the lower core joint is fixedly connected with the bottom end of the housing, and the bottom end of the lower core joint is fixedly connected with the lower core.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410355644.6A CN117948077B (en) | 2024-03-27 | 2024-03-27 | Rotary assembly sealing device of rotary blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410355644.6A CN117948077B (en) | 2024-03-27 | 2024-03-27 | Rotary assembly sealing device of rotary blowout preventer |
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| CN117948077A CN117948077A (en) | 2024-04-30 |
| CN117948077B true CN117948077B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410355644.6A Active CN117948077B (en) | 2024-03-27 | 2024-03-27 | Rotary assembly sealing device of rotary blowout preventer |
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| CN117948077A (en) | 2024-04-30 |
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