CN221896558U - A casing head that is easy to connect - Google Patents

Abstract

The utility model relates to the technical field of casing heads, and specifically discloses a casing head that is easy to connect, comprising: a casing head body, a flange plate fixedly installed on the upper end of the casing head body, a connecting ring fixedly installed on the inner side of the upper end of the casing head body, a threaded barrel fixedly installed on the inner side of the lower end of the casing head body, a plurality of limit rods uniformly and elastically connected to the side wall of the casing head body, the limit rods are located below the threaded barrel, a connecting pipe is inserted into the threaded barrel and threadedly connected to the inner wall of the threaded barrel until the upper end of the connecting pipe contacts the lower end of the connecting ring, and the upper end of the sealing ring is located in a groove, so that the connection between the connecting pipe and the connecting ring is sealed, and then the threaded cover is screwed, and the limit rod can be pushed inward when the threaded cover moves downward, and the inner end of the limit rod can be inserted into the limit groove through a tension spring, so that the connecting pipe is fixed to prevent the connecting pipe from loosening during use.

Description

A casing head that is easy to connect

Technical Field

The utility model relates to the technical field of casing heads, in particular to a casing head which is easy to connect.

Background Art

During the oilfield drilling and production process, the casing head is a component that connects the casing and various wellhead devices. It is used to support the gravity of the technical casing and the oil layer casing, seal the annular space between the layers of pipes, and provide transition connections for installing upper wellhead devices such as blowout preventers, tubing heads and Christmas trees.

During installation, the existing casing head is usually provided with an internal thread inside the casing head and an external thread outside the inner tube, and the casing head is installed by threaded connection through the internal and external threads. During long-term use, the threaded connection of the casing head is easy to loosen, resulting in leakage at the loosened part, causing safety accidents.

Utility Model Content

The purpose of the utility model is to provide a casing head which is easy to connect, so as to solve the problems raised in the above background technology.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a casing head that is easy to connect, comprising: a casing head body, a flange fixedly installed on the upper end of the casing head body, a connecting ring fixedly installed on the inner side of the upper end of the casing head body, a threaded barrel fixedly installed on the inner side of the lower end of the casing head body, and a plurality of limit rods uniformly and elastically connected to the side wall of the casing head body, and the limit rods are located below the threaded barrel.

Preferably, the upper end of the connecting ring is flush with the upper ends of the casing head body and the flange, and the lower end of the connecting ring is provided with a groove 1 which is in a circular ring shape.

Preferably, the upper end of the threaded barrel is fixedly mounted on the lower end of the connecting ring, and the lower end of the threaded barrel is fixedly mounted on the inner wall of the lower end of the casing head body through a fixing ring.

Preferably, the inner end of the sleeve head body is connected to a connecting pipe, a threaded groove is provided on the outer wall of the upper end of the connecting pipe, the connecting pipe is threadedly connected to the inner wall of the threaded barrel through the threaded groove, a groove 2 is provided at the top of the connecting pipe, the groove 2 is in a circular ring shape, and a sealing ring is arranged in the groove 2.

Preferably, a limit block is fixedly installed on the outer wall of the upper end of the connecting pipe, the limit block is in a circular ring shape, and a plurality of limit grooves are evenly opened on the outer end side wall of the limit block.

Preferably, an external thread is provided on the outer wall of the casing head body, a threaded cover is sleeved on the outer end of the casing head body, and the inner end of the threaded cover is threadedly connected to the external thread.

Preferably, a plurality of through holes corresponding to the limit grooves are evenly opened on the outer wall of the sleeve head body, a limit rod is slidably arranged in each through hole, a baffle is fixedly installed on the outer wall of the limit rod, a spring is sleeved on the outer wall of the limit rod, one end of the spring is fixedly installed in the through hole, and the other end is fixedly installed on the baffle.

Preferably, a slope is provided at the outer end of the limiting rod, the threaded cover can push the limiting rod inward, and the inner end of the limiting rod can be inserted into the limiting groove through a tension spring.

Compared with the prior art, the beneficial effects of the utility model are:

The connecting pipe is inserted into the threaded barrel and threadedly connected to the inner wall of the threaded barrel until the upper end of the connecting pipe contacts the lower end of the connecting ring and the upper end of the sealing ring is located in the groove 1, thereby sealing the connection between the connecting pipe and the connecting ring. Then, the threaded cover is screwed on. When the threaded cover moves downward, the limit rod can be pushed inward. The inner end of the limit rod can be inserted into the limit groove through the tension spring to fix the connecting pipe and prevent the connecting pipe from loosening during use.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the structure of the casing head body of the utility model;

Figure 2 is a schematic cross-sectional view of the overall structure of the utility model;

FIG3 is an enlarged view of the structure of area A in FIG2 of the present utility model;

FIG. 4 is a top view of the connecting pipe of the utility model.

In the figure: 1. casing head body; 2. flange; 3. connecting ring; 4. groove one; 5. threaded barrel; 6. fixing ring; 7. external thread; 8. threaded cover; 9. through hole; 10. limiting rod; 11. baffle; 12. spring; 13. connecting pipe; 14. limiting block; 15. limiting groove; 16. threaded groove; 17. sealing ring; 18. groove two.

DETAILED DESCRIPTION

In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1 to 4. The utility model provides a technical solution: a casing head that is easy to connect, comprising: a casing head body 1, a flange 2 is fixedly installed on the upper end of the casing head body 1, a connecting ring 3 is fixedly installed on the inner side of the upper end of the casing head body 1, the upper end of the connecting ring 3 is flush with the casing head body 1 and the upper ends of the flange 2, a groove 4 is opened at the lower end of the connecting ring 3, and the groove 4 is annular, so that the casing head body 1 and the external pipeline can be connected conveniently through the flange 2, a threaded barrel 5 is fixedly installed on the inner side of the lower end of the casing head body 1, the upper end of the threaded barrel 5 is fixedly installed on the lower end of the connecting ring 3, and the lower end of the threaded barrel 5 is fixedly installed on the inner wall of the lower end of the casing head body 1 through a fixing ring 6, the inner end of the fixing ring 6 is fixedly connected to the outer wall of the lower end of the threaded barrel 5, and the outer end of the fixing ring 6 is fixedly connected to the inner wall of the lower end of the casing head body 1, so that the threaded barrel 5 is fixedly installed in the casing head body 1.

The inner end of the casing head body 1 is connected to a connecting pipe 13, and a thread groove 16 is provided on the outer wall of the upper end of the connecting pipe 13. The connecting pipe 13 is threadedly connected to the inner wall of the threaded barrel 5 through the thread groove 16. A groove 18 is provided at the top of the connecting pipe 13. The groove 18 is in a circular ring shape, and a sealing ring 17 is provided in the groove 18. When the connecting pipe 13 is threadedly connected in the threaded barrel 5, the upper end of the connecting pipe 13 contacts the lower end of the connecting ring 3, and the upper end of the sealing ring 17 is located in the groove 14, which plays a role in sealing the connection between the connecting pipe 13 and the connecting ring 3.

A limit block 14 is fixedly installed on the outer wall of the upper end of the connecting tube 13. The limit block 14 is in a circular ring shape. A plurality of limit grooves 15 are evenly provided on the outer side wall of the limit block 14. A plurality of through holes 9 corresponding to the limit grooves 15 are evenly provided on the outer wall of the casing head body 1. When the connecting tube 13 is threadedly connected in the threaded barrel 5 and the upper end of the connecting tube 13 is in contact with the lower end of the connecting ring 3, the limit groove 15 is located at the inner end of the through hole 9.

An external thread 7 is provided on the outer wall of the casing head body 1 , and a threaded cover 8 is sleeved on the outer end of the casing head body 1 . The inner end of the threaded cover 8 is threadedly connected to the external thread 7 , and the threaded cover 8 can move up and down on the outer wall of the casing head body 1 .

A plurality of limit rods 10 are evenly and elastically connected to the side wall of the casing head body 1, and the limit rods 10 are located below the threaded tube 5. A limit rod 10 is slidably arranged in each through hole 9, and a baffle 11 is fixedly installed on the outer wall of the limit rod 10. A spring 12 is sleeved on the outer wall of the limit rod 10, one end of the spring 12 is fixedly installed in the through hole 9, and the other end is fixedly installed on the baffle 11. When the spring 12 is in a balanced state, the outer end of the limit rod 10 is located outside the through hole 9, and the other end of the limit rod 10 is located at the lower end of the fixing ring 6.

The outer end of the limiting rod 10 is provided with a slope, and the limiting rod 10 can be pushed inward when the threaded cover 8 moves downward, and the inner end of the limiting rod 10 can be inserted into the limiting groove 15 through the tension spring 12 to fix the connecting pipe 13.

In actual use, the connecting tube 13 is inserted into the threaded barrel 5 and threadedly connected to the inner wall of the threaded barrel 5 until the upper end of the connecting tube 13 contacts the lower end of the connecting ring 3, and the upper end of the sealing ring 17 is located in the groove 4, so as to seal the connection between the connecting tube 13 and the connecting ring 3. Then, the threaded cover 8 is screwed on. When the threaded cover 8 moves downward, the limiting rod 10 can be pushed inward. The inner end of the limiting rod 10 can be inserted into the limiting groove 15 through the tension spring 12 to fix the connecting tube 13.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A casing head for facilitating connection, comprising: casing head body (1), its characterized in that: the casing head is characterized in that a flange plate (2) is fixedly arranged at the upper end of the casing head body (1), a connecting ring (3) is fixedly arranged on the inner side of the upper end of the casing head body (1), a threaded cylinder (5) is fixedly arranged on the inner side of the lower end of the casing head body (1), a plurality of limit rods (10) are uniformly and elastically connected to the side wall of the casing head body (1), and the limit rods (10) are located below the threaded cylinder (5).

2. A casing head for facilitating connection according to claim 1, wherein: the upper end of the connecting ring (3) is flush with the upper ends of the casing head body (1) and the flange plate (2), the lower end of the connecting ring (3) is provided with a groove I (4), and the groove I (4) is in a circular ring shape.

3. A casing head for facilitating connection according to claim 2, wherein: the upper end of the thread cylinder (5) is fixedly arranged at the lower end of the connecting ring (3), and the lower end of the thread cylinder (5) is fixedly arranged on the inner wall of the lower end of the casing head body (1) through the fixing ring (6).

4. A casing head for facilitating connection as defined in claim 3, wherein: the inner end of the casing head body (1) is connected with a connecting pipe (13), a thread groove (16) is formed in the outer wall of the upper end of the connecting pipe (13), the connecting pipe (13) is connected with the inner wall of the thread cylinder (5) through the thread groove (16), a groove II (18) is formed in the top end of the connecting pipe (13), the groove II (18) is in a circular ring shape, and a sealing ring (17) is arranged in the groove II (18).

5. A coupling-facilitating casing head according to claim 4, wherein: a limiting block (14) is fixedly arranged on the outer wall of the upper end of the connecting pipe (13), the limiting block (14) is in a circular ring shape, and a plurality of limiting grooves (15) are uniformly formed in the side wall of the outer end of the limiting block (14).

6. A casing head for facilitating connection as defined in claim 5, wherein: an external thread (7) is arranged on the outer wall of the casing head body (1), a thread cover (8) is sleeved at the outer end of the casing head body (1), and the inner end of the thread cover (8) is in threaded connection with the external thread (7).

7. A casing head for facilitating connection as defined in claim 6, wherein: through holes (9) corresponding to the limit grooves (15) are uniformly formed in the outer wall of the casing head body (1), a limit rod (10) is slidably arranged in each through hole (9), a baffle plate (11) is fixedly installed on the outer wall of the limit rod (10), a spring (12) is sleeved on the outer wall of the limit rod (10), one end of the spring (12) is fixedly installed in the through hole (9), and the other end of the spring is fixedly installed on the baffle plate (11).

8. A casing head for facilitating connection as defined in claim 7, wherein: the outer end of the limiting rod (10) is provided with a slope, the threaded cover (8) can push the limiting rod (10) inwards, and the inner end of the limiting rod (10) can be inserted into the limiting groove (15) through the tension spring (12).