A multi-isolation protection combined seal water and gas rotary joint and a drilling rig

Abstract

The present invention discloses a multi-isolation protection combined seal water and gas rotary joint and a drilling rig, which includes a seal cabin assembly and a support protection assembly. The seal cabin assembly includes a wear-resistant shaft, a seal cabin arranged outside the wear-resistant shaft, and a guide pressure ring. A tension spring and a combined seal sleeve are sequentially connected between the wear-resistant shaft and the seal cabin. The support protection assembly includes a guide pressure ring, a protection umbrella, a protection cover and a base. The guide pressure ring and the base are both connected to the ends of the seal cabin, and the guide pressure ring is connected to the combined seal sleeve. The seal cabin is also provided with an oil cup three that communicates with the combined seal sleeve. The protection umbrella and the protection cover are sleeved on the wear-resistant shaft, and the protection umbrella extends towards the protection cover. A sealing device is arranged between the protection cover and the base. The end of the wear-resistant shaft communicates with the main shaft. In the seal cabin assembly of the present invention, each seal in the combined seal sleeve is elastically extruded by the tension spring, so that each seal is extruded towards the wear-resistant shaft and the inner wall of the seal cabin, increasing the sealing performance of the seal cabin assembly.

Description

Technical Field

[0001] The present invention relates to a multi-isolation protection combined seal water and gas rotary joint and a drilling rig, belonging to the technical field of construction machinery. Background Art

[0002] The rotary joint is a key working component of deep and water drilling rigs. It is mainly installed on the top of the power head, playing the role of connecting rotating components and fixed components and sealing media such as circulating water or gas.

[0003] During mud drilling, the sealing is worn relatively fast by particulate drill cuttings. When frequently switching between mud and air drilling processes, air leakage and mud leakage are likely to occur. The existing rotary joints have the following specific defects: 1. Single function. When the working medium is changed, in order to achieve better sealing effect, the rotary joint needs to be replaced. If the special rotary joint is not replaced, it is easy to cause early leakage failures, affecting the operation efficiency; 2. Currently, the rotary joint lacks effective and reliable protection. After leakage occurs, mud or high-pressure gas is likely to damage the oil seal of the power head and enter the power head housing, causing damage to the power head; 3. Time-consuming to replace and low working efficiency. Summary of the Invention

[0004] To solve the deficiencies of the prior art, the purpose of the present invention is to provide a multi-isolation protection combined seal water and gas rotary joint and a drilling rig, which solves the technical problems of easy leakage, lack of effective protection and low replacement efficiency of the rotary joint in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A multi-isolation protection combined seal water and gas rotary joint includes a seal chamber assembly and a support protection assembly. The seal chamber assembly includes a wear-resistant shaft, a seal chamber arranged outside the wear-resistant shaft, and a guide pressure ring. A tension spring and a combined seal sleeve are sequentially connected between the wear-resistant shaft and the seal chamber. The support protection assembly includes a guide pressure ring, a protection umbrella, a protection cover and a base. The guide pressure ring and the base are both connected to the ends of the seal chamber, and the guide pressure ring is connected to the combined seal sleeve. The seal chamber is also provided with an oil cup three that communicates with the combined seal sleeve;

[0007] The protection umbrella and the protection cover are sleeved on the wear-resistant shaft, and the protection umbrella extends towards the protection cover. A sealing device is provided between the protection cover and the base. The end of the wear-resistant shaft communicates with the main shaft.

[0008] As a preferred solution of the present invention, for the aforementioned multi-isolation protection combined seal water and gas rotary joint, the combined seal sleeve includes a pressure ring one, a V-shaped sealing ring one, a support ring one, a combined multi-lip sealing ring one, a lubricating grid ring, a combined multi-lip sealing ring two, a pressure ring two, a V-shaped sealing ring two, and a support ring two that are sequentially connected. The pressure ring one is connected to the tension spring, and the support ring two is connected to the guide pressure ring.

[0009] As a preferred solution of the present invention, in the aforementioned multi-isolation protection combined sealed water and gas rotary joint, the wear-resistant shaft connecting surface of the lubricating ring is provided with a lubricating oil groove, and the oil cup is connected to the lubricating oil groove.

[0010] As a preferred embodiment of the present invention, in the aforementioned multi-isolation protection combined sealed water and gas rotary joint, the guide pressure ring is also provided with a lubricating oil passage 1 connected to the supporting ring 2, and the lubricating oil passage 1 is provided with an oil cup 2.

[0011] As a preferred solution of the present invention, in the aforementioned multi-isolation protection combined sealed water and gas rotary joint, the guide pressure ring is connected to the support ring 2 through a stop extending into the sealed cabin.

[0012] As a preferred solution of the present invention, in the aforementioned multi-isolation protection combined sealed water and gas rotary joint, the tension spring connecting end of the sealed cabin is provided with a tension spring groove, and the tension spring is connected to the tension spring groove.

[0013] As a preferred embodiment of the present invention, the aforementioned multi-isolation protection combined sealed water and gas rotary joint, the sealing device includes a plurality of sealing grooves 2 arranged on the base, a plurality of sealing grooves 1 arranged on the protective cover, and the plurality of sealing grooves 2 are alternately connected with the plurality of sealing grooves 1.

[0014] As a preferred embodiment of the present invention, the aforementioned multi-isolation protection combined sealed water and gas rotary joint, a felt ring is also provided between the base and the wear-resistant shaft, the base is provided with two lubricating oil channels connected to the felt ring, and the lubricating oil channel two is also provided with an oil cup.

[0015] As a preferred solution of the present invention, the aforementioned multi-isolation protection combined sealing water and gas rotary joint, the protection cover is connected to the wear-resistant shaft through threads.

[0016] A drilling machine comprises any one of the above-mentioned multi-isolation protection combined sealing water and gas rotating joints.

[0017] The beneficial effects achieved by the present invention are:

[0018] During operation, the sealing cabin assembly of the present invention elastically squeezes each seal in the combined sealing sleeve through the tension spring, so that each seal is squeezed toward the wear-resistant shaft and the inner wall of the sealing cabin, thereby increasing the sealing performance of the sealing cabin assembly and compensating for the wear of the seal, thereby increasing the service life of the seal. On the other hand, the sealing cabin assembly is provided with oil cup 2 and oil cup 3, which can provide lubricating oil to the sealing cabin assembly. Two support rings, support ring 1 and support ring 2, can support the wear-resistant shaft and the sealing cabin, improve the coaxiality between the wear-resistant shaft and the sealing cabin, and avoid the problem of rapid wear of the seal due to poor coaxiality.

[0019] The V-ring seal one and the V-ring seal two can effectively resist high-pressure media in the external environment. The two combined multi-lip seal rings, namely the combined multi-lip seal ring one and the combined multi-lip seal ring two, are provided with O-ring seals, which can filter particulate media in advance and reliably seal mud media.

[0020] After the lower support and the protection group connect the wear-resistant shaft and the main shaft in sequence, the base with the felt ring and the oil cup one installed is fixed to the mounting seat, and then the protection cover and the protection umbrella are installed. The oil cup one mainly lubricates the felt ring and increases the protection of the labyrinth.

[0021] The felt ring, the protection cover and the protection umbrella prevent water and gas from leaking into the power head box body through multiple groups of protections. Brief Description of the Drawings

[0022] Figure 1 is the axial sectional view of the overall structure of the present invention;

[0023] Figure 2 is the present invention Figure 1 partial enlarged view;

[0024] Figure 3 is the axial sectional view of the seal cabin assembly of the present invention;

[0025] Figure 4 is the axial sectional view of the support and protection assembly of the present invention;

[0026] The meanings of the reference numerals in the drawings: 1-main shaft; 3-base; 4-oil cup one; 5-protection umbrella; 6-bolt two; 9-oil cup two; 10-bolt one; 13-oil cup three; 14-V-ring seal one; 141-V-ring seal two; 15-seal cabin; 151-tension spring groove; 16-tension spring; 17-wear-resistant shaft; 18-support ring one; 181-support ring two; 19-combined multi-lip seal ring one; 191-combined multi-lip seal ring two; 20-lubricating grid ring; 21-pressure ring one; 211-pressure ring two; 22-support ring; 23-guide pressure ring; 231-lubricating oil channel one; 232-stopper; 24-protection cover; 241-seal groove one; 25-felt ring; 31-lubricating oil channel two; 201-lubricating oil groove; 32-seal groove two. Detailed Description of the Invention

[0027] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0028] As Figures 1 to 4As shown: This embodiment discloses a multi-isolation and protection combined seal water and gas rotary joint, including a seal chamber assembly and a support and protection assembly. The seal chamber assembly includes a wear-resistant shaft 17 (hollow structure), a seal chamber 15 arranged outside the wear-resistant shaft 17, and a guide pressure ring 23. It can also be understood that the seal chamber 15 is provided with a seal cavity, and the wear-resistant shaft 17 is arranged inside the seal cavity. Among them, a tension spring 16 and a combined seal sleeve are sequentially connected between the wear-resistant shaft 17 and the seal chamber 15. The support and protection assembly includes a guide pressure ring 23, a protective umbrella 5, a protective cover 24, and a base 3. The guide pressure ring 23 and the base 3 are both connected to the ends of the seal chamber 15, and the guide pressure ring 23 is connected to the combined seal sleeve. The seal chamber 15 is also provided with an oil cup three 13 that conducts to the combined seal sleeve.

[0029] For the convenience of assembly and maintenance, in this embodiment, the seal chamber 15 and the base 3 can be connected by a first bolt 10, and the guide pressure ring 23 and the seal chamber 15 can be connected by a second bolt 6.

[0030] The protective umbrella 5 and the protective cover 24 are sleeved on the wear-resistant shaft 17, and the protective umbrella 5 extends towards the protective cover 24 to protect the protective cover 24. A sealing device is provided between the protective cover 24 and the base 3. The end of the wear-resistant shaft 17 conducts to the main shaft 1. The protective cover 24 is preferably connected to the wear-resistant shaft 17 by a thread.

[0031] The combined seal sleeve of this embodiment includes a first pressure ring 21, a first V-shaped sealing ring 14, a first support ring 18, a first combined multi-lip sealing ring 19, a lubricating grid ring 20, a second combined multi-lip sealing ring 191, a second pressure ring 211, a second V-shaped sealing ring 141, and a second support ring 181 that are sequentially connected. The first pressure ring 21 is connected to the tension spring 16, and the second support ring 181 is connected to the guide pressure ring 23. Through the elasticity of the tension spring 16, each sealing member in the above combined seal sleeve is extruded so that it seals inwardly with the wear-resistant shaft 17.

[0032] Furthermore, the guide pressure ring 23 is connected to the second support ring 181 through a stop 232 extending into the seal chamber 15, further improving its sealing performance.

[0033] The connection surface of the lubricating grid ring 20 with the wear-resistant shaft 17 is provided with a lubricating oil groove 201, and the oil cup three 13 conducts to the lubricating oil groove 201. Preferably, the guide pressure ring 23 is also provided with a first lubricating oil passage 231 that conducts to the second support ring 181. The first lubricating oil passage 231 is provided with an oil cup two 9, so that the lubricating oil of the oil cup two 9 can flow to the second support ring 181.

[0034] The outer surface of the wear-resistant shaft 17 is connected to the protective umbrella 5 through a protective umbrella installation groove, that is, a ring groove matching the inner hole of the protective umbrella 5 is provided on the outer surface of the wear-resistant shaft 17, and the protective umbrella 5 is installed inside the ring groove to realize the fixation of the protective umbrella 5.

[0035] In order to further fix the tension spring 16, the tension spring connection end of the sealed cabin 15 in this embodiment is provided with a tension spring groove 151, and the tension spring 16 is connected to the tension spring groove 151. The advantage of the tension spring groove 151 is that the tension spring 16 does not undergo radial displacement, and the coaxiality of the tension spring 16, the wear-resistant shaft 17, and the inner cavity of the sealed cabin 15 is increased.

[0036] The sealing device includes a plurality of sealing grooves 2 32 disposed on the base 3 and a plurality of sealing grooves 1 241 disposed on the protective cover 24 . The plurality of sealing grooves 2 32 and the plurality of sealing grooves 1 241 are connected in an alternating manner to form a labyrinth-type sealing structure.

[0037] A felt ring 25 is further provided between the base 3 and the wear-resistant shaft 17 . The base 3 is provided with a second lubricating oil passage 31 connected to the felt ring 25 . The second lubricating oil passage 31 is further provided with an oil cup 4 .

[0038] During operation, the main shaft 1 and the wear-resistant shaft 17 rotate relative to the sealing cabin 15 and the base 3. During operation, the sealing cabin assembly of this embodiment elastically squeezes each seal in the combined sealing sleeve through the tension spring 16, so that each seal is squeezed toward the wear-resistant shaft 17 and the inner wall of the sealing cabin 15, thereby increasing the sealing performance of the sealing cabin assembly, while also being able to compensate for the wear of the seal and increase the service life of the seal. On the other hand, the sealing cabin assembly is provided with an oil cup 2 9 and an oil cup 3 13, which can provide lubricating oil to the sealing cabin assembly. Two support rings (support ring 1 18, support ring 2 181) can support the wear-resistant shaft 17 and the sealing cabin 15, improve the coaxiality between the wear-resistant shaft 17 and the sealing cabin 15, and avoid the problem of rapid wear of the seals due to poor coaxiality.

[0039] The V-shaped sealing ring 14 and the V-shaped sealing ring 141 can effectively resist the high-pressure medium in the external environment. The two combined multi-lip sealing rings (combined multi-lip sealing ring 19 and combined multi-lip sealing ring 191) are provided with O-shaped sealing rings, which can filter the granular medium in advance and reliably seal the mud medium.

[0040] After the lower support and protection group connect the wear-resistant shaft 17 to the main shaft 1 in sequence, fix the base with the felt ring and oil cup 1 installed on the mounting seat, and then install the protection cover and protection umbrella. The oil cup 1 4 mainly lubricates the felt ring 25 and increases the protection of the labyrinth protection.

[0041] The felt ring 25, the protective cover 24 and the protective umbrella 5 prevent leaked water and gas from entering the power head box through multiple groups of protection.

[0042] This embodiment also provides a drilling machine, comprising the multi-isolation protection combined sealing water and gas rotary joint mentioned above in this embodiment.

[0043] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multi-isolation protection combined sealed water and gas rotary joint, It is characterized in that The invention comprises a sealed cabin assembly and a supporting and protecting assembly, wherein the sealed cabin assembly comprises a wear-resistant shaft (17), a sealed cabin (15) arranged outside the wear-resistant shaft (17), and a guide pressure ring (23), and a tension spring (16) and a combined sealing sleeve which are connected in sequence are also arranged between the wear-resistant shaft (17) and the sealed cabin (15). The combined sealing sleeve comprises a pressure ring 1 (21), a V-shaped sealing ring 1 (14), a support ring 1 (18), a combined multi-lip sealing ring 1 (19), a lubricating ring (20), a combined multi-lip sealing ring 2 (191), a pressure ring 2 (211), a V-shaped sealing ring 2 (141), and a support ring 2 (181) which are connected in sequence, wherein the pressure ring 1 (21) is connected to a tension spring (16), and the support ring 2 (181) is connected to a guide pressure ring (23); The supporting protection assembly comprises a protection umbrella (5), a protection cover (24) and a base (3); the guide pressure ring (23) and the base (3) are both connected to the end of the sealing cabin (15); the guide pressure ring (23) is connected to the combined sealing sleeve; the sealing cabin (15) is also provided with an oil cup three (13) connected to the combined sealing sleeve; The protective umbrella (5) and the protective cover (24) are sleeved on the wear-resistant shaft (17), and the protective umbrella (5) extends in the direction of the protective cover (24). A sealing device is provided between the protective cover (24) and the base (3), and the end of the wear-resistant shaft (17) is connected to the main shaft (1); The connecting surface of the lubricating ring (20) and the wear-resistant shaft (17) is provided with a lubricating oil groove (201), and the oil cup three (13) is connected to the lubricating oil groove (201); The guide pressure ring (23) is also provided with a lubricating oil passage 1 (231) connected to the supporting ring 2 (181), and the lubricating oil passage 1 (231) is provided with an oil cup 2 (9).

2. A multi-isolation protection combined sealed water and gas rotary joint according to claim 1, It is characterized in that The guide pressure ring (23) is connected to the second support ring (181) via a stopper (232) extending into the sealing chamber (15).

3. A multi-isolation protection combined sealed water and gas rotary joint according to claim 1, It is characterized in that A tension spring groove (151) is provided at the tension spring connection end of the sealed cabin (15), and the tension spring (16) is connected to the tension spring groove (151).

4. A multi-isolation protection combined sealed water and gas rotary joint according to claim 1, It is characterized in that The sealing device comprises a plurality of sealing grooves 2 (32) arranged on the base (3) and a plurality of sealing grooves 1 (241) arranged on the protective cover (24); the plurality of sealing grooves 2 (32) and the plurality of sealing grooves 1 (241) are connected in an alternating manner.

5. A multi-isolation protection combined sealed water and gas rotary joint according to claim 1, It is characterized in that A felt ring (25) is further provided between the base (3) and the wear-resistant shaft (17), the base (3) is provided with a second lubricating oil passage (31) connected to the felt ring (25), and the second lubricating oil passage (31) is further provided with an oil cup (4).

6. A multi-isolation protection combined sealed water and gas rotary joint according to claim 1, characterized in that, the protective cover (24) is threadedly connected to the wear-resistant shaft (17).

7. A drilling rig, characterized in that, it includes the multi-isolation protection combined sealed water and gas rotary joint according to any one of claims 1 to 6.

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