Drilling riser of double-clamp-spring type connecting structure

Abstract

The utility model belongs to the technical field of riser pipes, and particularly relates to a drilling riser pipe with a double-clamp-spring type connecting structure, which comprises a riser pipe, connector structures are mounted at the ends, close to each other, of the two riser pipes, sealing structures are mounted in the connector structures, locking structures are mounted in the middles of the outer surfaces of the connector structures, and the locking structures are connected with the connector structures. The connector structure comprises a connector unit and a sealing unit, the sealing unit is arranged in the connector unit, the connector unit comprises a female connector, the right end in the female connector is connected with a male connector, and a connector is installed at the end, close to the female connector, in the male connector. According to the drilling riser of the double-clamp-spring type connecting structure, through the arrangement of the connector structure, when the female connector is connected with the male connector, the female connector and the male connector are connected in a reinforced mode through a flange and a fixing bolt, and meanwhile the sealing performance after connection is guaranteed through installation of a sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of risers, in particular to a drilling riser with a double snap ring connection structure. Background Technique

[0002] At present, the riser joints suitable for offshore oilfield development mainly include traditional joints and snap ring joints. The connection time of traditional joints is relatively long. Affected by the marine weather environment, engineering ships are required for operation, and there is a serious dependence on offshore construction equipment.

[0003] The maximum outer diameter of the snap ring joint is relatively large, and the size of the reserved hole on the current offshore riser jacket cannot be changed. Therefore, the snap ring joint sometimes cannot meet the production needs.

[0004] For example, as disclosed in a riser threaded joint in Chinese Patent CN201460761U, an internal threaded joint is fixed at the upper end of the riser, and an external threaded joint is fixed at the lower end of the riser. The O-ring is installed in the O-ring groove. During installation, the riser with the external threaded joint fixed is lifted by a lifting clamp, so that the external threaded end of the external threaded joint faces the internal threaded end of the internal threaded joint. Align the center lines of the two joints vertically, slowly place the external threaded end into the internal threaded joint end, and keep the center of gravity vertically aligned. When the external threaded end sits inside the internal threaded joint and no longer descends, start rotating the riser to screw in the threads until the two shoulder surfaces fit, and tighten the three anti-loosening set screws against the anti-loosening groove to complete the installation.

[0005] However, for the connection structure used in the above-mentioned comparative document, although the connection by using the threaded connection method is relatively convenient, relying on the threaded connection method for connection, after using for a certain period of time, or when the internal pressure of the pipeline is too high, leakage may occur due to the gap between the threaded connections, thus affecting the use of the riser.

[0006] Therefore, we urgently need to provide a drilling riser with a double snap ring connection structure. Content of the Utility Model

[0007] The purpose of the utility model is to provide a drilling riser with a double snap ring connection structure to solve the problem that in the connection structure used in the above-mentioned comparative document, although the connection by using the threaded connection method is relatively convenient, relying on the threaded connection method for connection, after using for a certain period of time, or when the internal pressure of the pipeline is too high, leakage may occur due to the gap between the threaded connections, thus affecting the use of the riser.

[0008] To achieve the above object, the present utility model provides the following technical solutions: A drilling riser with a double snap-ring connection structure, including a riser. At one end where two risers are close to each other, a connector structure is installed. Inside the connector structure, a sealing structure is installed. In the middle of the outer surface of the connector structure, a locking structure is installed.

[0009] The connector structure includes a joint unit and a sealing unit, and the sealing unit is arranged inside the joint unit.

[0010] The joint unit includes a female joint. At the right end inside the female joint, a male joint is connected. Near the female joint end inside the male joint, a connector is installed.

[0011] Preferably, the sealing unit includes a flange. On the right side of the outer surface of the flange, a threaded hole is opened. Inside the threaded hole, a fixing bolt is connected. On the left side of the flange, a sealing ring is installed.

[0012] Preferably, the connector is arranged on the outer surface of one end where two risers are close to each other. The sealing ring is installed inside an installation groove opened on the left side of the flange. The outer surface of the fixing bolt is threadedly connected with the inner part of a threaded groove opened on the right side of the female joint. The female joint is fixedly installed on the outer surface of the left riser. The male joint is fixedly installed on the outer surface of the right riser. The flange is connected to the female joint through the fixing bolt, and its connection part is sealed by the sealing ring.

[0013] Preferably, the sealing structure includes a snap ring. At the connecting end of the snap ring, a limit bolt is installed. Between two snap rings, a sealing gasket is arranged. On the right side of the sealing gasket, a connecting rod is fixedly installed. On the right side of the sealing gasket, a washer is connected.

[0014] Preferably, the snap ring is installed inside a limit groove inside the female joint and the male joint. The sealing gasket is installed inside a sealing groove opened inside the female joint and the male joint. The sealing gasket abuts against the washer through the connecting rod. There are two snap rings, and when the snap rings are connected and fixed in a limited way, the limit bolt is used for limit connection.

[0015] Preferably, the locking structure includes a hoop. At the connecting end of the hoop, a locking block is installed. Inside the locking block, a locking bolt is connected.

[0016] Preferably, the hoop is detachably installed inside a locking groove opened in the middle of the outer surface of the female joint. The outer surface of the locking bolt is threadedly connected with the inner wall of a threaded through hole opened in the middle of the locking block. By rotating the locking bolt, the tightness of the hoop can be adjusted, so as to ensure the connection tightness between the female joint and the male joint.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] 1. The drilling riser with a double snap ring connection structure, through the setting of the connector structure, when connecting the female connector and the male connector, uses the flange and the fixing bolts to reinforce the connection, and at the same time, through the installation of the sealing ring, ensures the sealing performance after connection.

[0019] 2. The drilling riser with a double snap ring connection structure, through the setting of the sealing structure and the locking structure, when quickly clamping the riser with two snap rings, uses the sealing gasket and the clamping and abutting of the connecting rod and the washer to effectively enhance the sealing performance at the connection. At the same time, the hoop and the locking block adjust the tightness through the locking bolts, effectively enhancing the connection strength and the sealing effect at the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall external structure of the present utility model;

[0021] Figure 2 is a schematic diagram of the disassembled structure of the present utility model;

[0022] Figure 3 is an enlarged sectional view of the female connector connection structure of the present utility model;

[0023] Figure 4 is an enlarged sectional view of the male connector structure of the present utility model;

[0024] Figure 5 is an enlarged view of the clamping and sealing structure of the present utility model;

[0025] Figure 6 is an enlarged view of the internal structure of the male connector of the present utility model.

[0026] In the figure: 1, riser; 101, female connector; 102, flange; 103, fixing bolt; 104, sealing ring; 105, connector; 106, male connector; 201, snap ring; 202, limit bolt; 203, sealing gasket; 204, connecting rod; 205, washer; 301, hoop; 302, locking block; 303, locking bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1-6 , the present utility model provides a technical solution: Embodiment

[0029] A drilling riser with a double circlip connection structure includes a riser 1. A connector structure is installed at one end where two risers 1 are close to each other. A sealing structure is installed inside the connector structure, and a locking structure is installed in the middle of the outer surface of the connector structure.

[0030] The connector structure includes a joint unit and a sealing unit. The sealing unit is arranged inside the joint unit. The joint unit includes a female joint 101. A male joint 106 is connected to the right end inside the female joint 101. A connector 105 is installed at one end of the male joint 106 close to the female joint 101. The sealing unit includes a flange 102. A threaded hole is opened on the right side of the outer surface of the flange 102. A fixing bolt 103 is connected inside the threaded hole. A sealing ring 104 is installed on the left side of the flange 102.

[0031] The connector 105 is arranged on the outer surface of one end where two risers 1 are close to each other. The sealing ring 104 is installed inside the installation groove opened on the left side of the flange 102. The outer surface of the fixing bolt 103 is in threaded connection with the internal threaded groove opened on the right side of the female joint 101. The female joint 101 is fixedly installed on the outer surface of the left riser 1, and the male joint 106 is fixedly installed on the outer surface of the right riser 1.

[0032] Through the setting of the connector structure, when connecting with the female joint 101 and the male joint 106, the flange 102 and the fixing bolt 103 are used to reinforce the connection, and at the same time, the installation of the sealing ring 104 ensures the sealing performance after connection.

[0033] When connecting two risers 1, through the snap connection of the female joint 101 and the male joint 106, a quick connection is carried out. During the connection process, the left side of the flange 102 abuts against the right side of the female joint 101. Then, the fixing bolt 103 is used to connect and fix the flange 102 and the female joint 101. At the same time, the sealing ring 104 installed inside the sealing groove opened on the left side of the flange 102 seals the connection part, thus effectively ensuring the sealing effect of the connection part and preventing leakage at the connection part. Embodiment

[0034] On the basis of Embodiment 1, the sealing structure includes a circlip 201. A limit bolt 202 is installed at the connection end of the circlip 201. A sealing gasket 203 is arranged between two circlips 201. A connecting rod 204 is fixedly installed on the right side of the sealing gasket 203, and a washer 205 is connected to the right side of the sealing gasket 203. The circlip 201 is installed inside the limit groove of the female joint 101 and the male joint 106. The sealing gasket 203 is installed inside the sealing groove opened in the female joint 101 and the male joint 106. The sealing gasket 203 abuts against the washer 205 through the connecting rod 204.

[0035] The locking structure includes a hoop 301. A locking block 302 is installed at the connecting end of the hoop 301, and a locking bolt 303 is connected inside the locking block 302. The hoop 301 is detachably installed inside a locking groove formed in the middle of the outer surface of the female joint 101. The outer surface of the locking bolt 303 is threadedly connected to the inner wall of a threaded through hole formed in the middle of the locking block 302.

[0036] Through the setting of the sealing structure and the locking structure, when the two circlips 201 are used to quickly connect the riser 1, the caulking and abutting of the gasket 203, the connecting rod 204 and the washer 205 effectively enhance the sealing performance of the connection. At the same time, the hoop 301 and the locking block 302 adjust the tightness through the locking bolt 303, effectively enhancing the connection strength and sealing effect of the connection.

[0037] When the two risers 1 are connected through the female joint 101 and the male joint 106, they are clamped and fixed by the two circlips 201, and the circlips 201 are limited by the limit bolts 202, which is convenient for subsequent disassembly. At the same time, the gasket 203 abuts against the washer 205 through the connecting rod 204, thereby effectively enhancing the sealing effect of the connection. After the connection, the distance between the locking blocks 302 is adjusted by rotating the locking bolt 303, so as to adjust the tightness of the hoop 301, and the hoop 301 is used to tighten the connection between the female joint 101 and the male joint 106, thereby ensuring the stability of the connection.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. A drilling riser with a double snap ring connection structure, comprising a riser (1), characterized in that: A connector structure is installed at one end of two adjacent risers (1). A sealing structure is installed inside the connector structure, and a locking structure is installed in the middle of the outer surface of the connector structure. The connector structure includes a joint unit and a sealing unit, and the sealing unit is arranged inside the joint unit. The joint unit includes a female joint (101). A male joint (106) is connected to the right end inside the female joint (101). A connector (105) is installed at one end of the male joint (106) close to the female joint (101).

2. A drilling riser with a double circlip connection structure according to claim 1, characterized in that: The sealing unit includes a flange (102). A threaded hole is formed on the right side of the outer surface of the flange (102). A fixing bolt (103) is connected inside the threaded hole. A sealing ring (104) is installed on the left side of the flange (102).

3. The drilling riser with a double circlip connection structure according to claim 2, characterized in that: The connector (105) is arranged on the outer surface of one end of two adjacent risers (1). The sealing ring (104) is installed inside an installation groove formed on the left side of the flange (102). The outer surface of the fixing bolt (103) is in threaded connection with the inside of a threaded groove formed on the right side of the female joint (101). The female joint (101) is fixedly installed on the outer surface of the left riser (1), and the male joint (106) is fixedly installed on the outer surface of the right riser (1).

4. A drilling riser with a double circlip connection structure according to claim 1, characterized in that: The sealing structure includes a snap ring (201). A limit bolt (202) is installed at the connecting end of the snap ring (201). A sealing gasket (203) is arranged between the two snap rings (201). A connecting rod (204) is fixedly installed on the right side of the sealing gasket (203), and a washer (205) is connected to the right side of the sealing gasket (203).

5. A drilling riser with a double circlip connection structure according to claim 4, characterized in that: The snap ring (201) is installed inside a limit groove inside the female joint (101) and the male joint (106). The sealing gasket (203) is installed inside a sealing groove formed inside the female joint (101) and the male joint (106). The sealing gasket (203) abuts against the washer (205) through the connecting rod (204).

6. The drilling riser with a double circlip connection structure according to claim 1, characterized in that: The locking structure includes a hoop (301). A locking block (302) is installed at the connecting end of the hoop (301). A locking bolt (303) is connected inside the locking block (302).

7. The drilling riser with a double snap-ring connection structure according to claim 6, characterized in that: The hoop (301) is detachably installed inside a locking groove formed in the middle of the outer surface of the female joint (101). The outer surface of the locking bolt (303) is in threaded connection with the inner wall of a threaded through hole formed in the middle of the locking block (302).

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