Anti-rotation device for riser connector

Abstract

The utility model discloses a riser connector anti-rotation device which comprises an anti-rotation block arranged between a male connector and a female connector, the lower portion of the anti-rotation block is provided with a bearing protrusion, a locking protrusion of the male connector is provided with a plurality of positioning grooves, the groove depth of the positioning grooves exceeds the thickness of the anti-rotation block, and the inner wall of the female connector is provided with an annular matching groove. The anti-rotation block is inserted into the positioning groove and can move towards the female connector till the bearing protrusion is clamped into the female connector matching groove, the anti-rotation block and the male connector are fixed, and therefore axial displacement or rotation between the male connector and the female connector is prevented. By the adoption of the waterproof guide pipe connector anti-rotation device, in the installation process, generation of any spark is avoided, and due to the fact that the anti-rotation block and the male connector are fixedly connected into a whole, the whole connecting structure is firmer and more durable. In a long-term marine environment, looseness or damage caused by vibration and impact can be reduced, and therefore the service life of the waterproof guide pipe is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of marine drilling riser, and particularly relates to a riser joint anti-rotation device. BACKGROUND

[0002] Offshore drilling operation is an important means for developing seabed energy such as oil, natural gas and combustible ice. In this process, the riser plays a crucial role. As a casing extending from the offshore drilling platform to the seabed shallow layer, the riser not only effectively isolates seawater and drilling mud, but also forms a channel for drilling fluid circulation and serves as a support structure for the offshore wellhead. The threaded riser is connected by a threaded quick coupling, has high connection efficiency and good sealing performance, and has high comprehensive performance, and is suitable for deeper sea areas. In field operation, the threaded riser needs to be connected one by one to form a pipe string structure. However, the marine environment is complex and changeable, and the continuous impact and vibration of waves and tides will pose a serious challenge to the offshore drilling platform and the riser. In addition, many other factors may cause the connected pipe string to be at risk of loosening or back-off. Therefore, a riser joint anti-rotation device is designed to help the riser string better resist the marine environment. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a kind of riser joint anti-rotation device, to solve the problem that threaded riser may be at risk of loosening or back-off in complex and changeable marine environment.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of riser joint anti-rotation device, including anti-rotation block, it is located between male joint and female joint, the lower part of anti-rotation block is equipped with bearing protrusion, the locking protrusion of male joint is equipped with multiple positioning grooves, the groove depth of positioning groove exceeds the thickness of anti-rotation block, the inner wall of female joint is equipped with annular matching groove, after the threaded connection of male joint and female joint, anti-rotation block is inserted into positioning groove and can be moved to bearing protrusion and is inserted into female joint matching groove in the direction of female joint, fixed anti-rotation block and male joint, to prevent axial displacement or rotation between male joint and female joint.

[0006] By adopting the anti-rotation device for the marine riser joint, the connection between the male joint and the female joint is significantly strengthened. The load bearing protrusion at the lower end of the anti-rotation block can be precisely clamped into the matching groove of the female joint, effectively preventing axial displacement or rotation between the male joint and the female joint, thereby ensuring the stability of the marine riser in the complex and changeable marine environment. Compared with directly hard-welding the anti-rotation block into the gap between the male joint and the female joint, the installation process of the anti-rotation block in the present solution is simpler. The anti-rotation block can be easily inserted into the positioning groove and automatically moved to the correct position, and the present solution avoids any spark generation during the installation process, which is crucial for offshore drilling operations. The spark may cause fire or explosion hazards, and the present solution completely eliminates this risk. Since the anti-rotation block is integrally connected with the male joint, the entire connection structure is more robust and durable. In the long-term marine environment, it can reduce loosening or damage caused by vibration and impact, thereby prolonging the service life of the marine riser.

[0007] In a preferred implementation, the load bearing protrusion is provided with a first inclined load bearing surface, the lower end of the anti-rotation block is provided with a second inclined load bearing surface, the first load bearing surface and the second load bearing surface are parallel, and the second load bearing surface abuts the upper surface of the threaded protrusion of the male joint to transmit the pressure received by the load bearing protrusion to the male joint.

[0008] The extrusion force is transmitted to the anti-rotation block through the first load bearing surface, and the anti-rotation block receives the extrusion force which is then transmitted to the male joint through the second load bearing surface. When the female joint attempts to rotate in the opposite direction, it will encounter strong resistance from the anti-rotation block. At the same time, this transmission mechanism increases the stability and anti-backout capability of the entire connection. It avoids premature damage to the load bearing protrusion due to stress concentration. By dispersing stress, the overall life of the load bearing protrusion and the anti-rotation block is prolonged.

[0009] In a preferred implementation, the positioning groove is provided with a ballast surface, and the ballast surface is in contact with the first load bearing surface and is arranged in parallel.

[0010] In a preferred implementation, the first load bearing surface and the second load bearing surface satisfy the angle θ between the plane, 40°≤θ≤60°.

[0011] In a preferred implementation, the load bearing protrusion is arranged close to the second load bearing surface, and the load bearing protrusion is provided with one or more rows.

[0012] Arranging the load bearing protrusion close to the second load bearing surface can significantly reduce the vertical distance between the first load bearing surface and the second load bearing surface. When subjected to external loads, force can be more directly and efficiently transmitted to the male joint. Arranging multiple rows of load bearing protrusions can further disperse stress and improve the overall strength of the connection structure. In the case of extreme loads or complex stress states, multiple rows of load bearing protrusions can better resist deformation and damage.

[0013] In the preferred implementation, the anti-rotation block has protrusions extending towards both sides, the protrusions form a stepped surface with the anti-rotation block, the positioning groove has an opening towards the female connector, the opening has a width smaller than the inner width of the positioning groove, the width of the anti-rotation block is equal to or smaller than the width of the opening, and the total width of the anti-rotation block and the protrusions is larger than the width of the opening. The stepped surface abuts against the inner wall of the positioning groove.

[0014] When the anti-rotation block is fully inserted into the positioning groove, the stepped surface abuts against the inner wall of the positioning groove. This abutment not only prevents the anti-rotation block from coming out, but also forms an additional force transmission path. When the anti-rotation block is subjected to external loads, these loads can be effectively transmitted to the positioning groove and then to the male connector through the stepped surface.

[0015] In the preferred implementation, the upper part of the anti-rotation block has a thickness larger than the lower part. After the load protrusion is inserted into the fitting groove, the junction between the upper part and the lower part of the anti-rotation block abuts against the upper end surface of the female connector.

[0016] In the preferred implementation, the fitting groove has a female connector arc surface towards the male connector, and the load protrusion has an arc surface matching the female connector arc surface.

[0017] In the preferred implementation, the upper part of the anti-rotation block has a positioning threaded hole, the positioning groove has a positioning hole, and a bolt passes through the positioning threaded hole and enters the positioning hole to fix the anti-rotation block and the male connector.

[0018] In the preferred implementation, the upper part of the anti-rotation block has a disassembly groove to facilitate disassembly of the anti-rotation block. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0020] Figure 1 A schematic embodiment of the male connector and the female connector of the riser joint is shown in the drawings;

[0021] Figure 2 A schematic embodiment of the anti-rotation block of the present application is shown in the drawings;

[0022] Figure 3 A schematic embodiment of the anti-rotation block of the present application is shown in the drawings;

[0023] Figure 4 A schematic embodiment of the anti-rotation block of the present application is shown in the drawings;

[0024] Figure 5A schematic embodiment state diagram of the anti-rotation block pressure transmission of the present application is shown.

[0025] Brief Description of the Drawings

[0026] 1. male joint; 10, locking protrusion; 100, positioning groove; 101, positioning hole; 11, threaded protrusion; 2, female joint; 20, mating groove; 200, ballast surface; 3, anti-rotation block; 30, bearing protrusion; 300, first bearing surface; 301, arc surface; 31, second bearing surface; 32, boss; 33, positioning threaded hole; 34, disassembly groove. DETAILED DESCRIPTION

[0027] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present application. Therefore, the drawings and the description are considered to be essentially exemplary rather than limiting.

[0028] In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through an excessive structure, but is connected only through a connection structure to form a whole. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] In this utility model, terms such as "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0031] The present invention will be described below with reference to the accompanying drawings.

[0032] The specific plans adopted are:

[0033] like Figures 1-5 As shown, the utility model provides an anti-rotation device for a watertight conductor joint, including an anti-rotation block 3, which is arranged between the male joint 1 and the female joint 2. A bearing protrusion 30 is provided at the lower part of the anti-rotation block 3, and the locking protrusion 10 of the male joint 1 is provided with a plurality of positioning grooves 100. The groove depth of the positioning groove 100 exceeds the thickness of the anti-rotation block 3, and an annular matching groove 20 is provided on the inner wall of the female joint 2. After the male joint 1 and the female joint 2 are threadedly connected, the anti-rotation block 3 is inserted into the positioning groove 100 and can be moved toward the female joint 2 until the bearing protrusion 30 is stuck in the matching groove 20 of the female joint 2, fixing the anti-rotation block 3 and the male joint 1 to prevent axial displacement or rotation between the male joint 1 and the female joint 2.

[0034] In the above structure, the connection between the male connector 1 and the female connector 2 is significantly strengthened through the design of the anti-rotation block 3. The bearing protrusion 30 at the bottom of the anti-rotation block 3 can be accurately inserted into the matching groove 20 of the female connector 2, effectively preventing axial displacement or rotation between the male connector 1 and the female connector 2, thereby ensuring the stability of the watertight duct in the complex and changeable marine environment. Compared with directly hammering the anti-rotation block 3 into the gap between the male connector 1 and the female connector 2, the installation process of the anti-rotation block 3 in this solution is simpler. The anti-rotation block 3 can be easily inserted into the positioning groove 100 and automatically move to the correct position. During the installation process, this solution avoids the generation of any sparks, which is crucial for offshore drilling operations. Sparks may cause safety hazards such as fire or explosion, but this solution completely eliminates this risk. Since the anti-rotation block 3 is fixedly connected to the male connector 1 as a whole, the entire connection structure is more sturdy and durable. In a long-term marine environment, it can reduce loosening or damage caused by vibration and impact, thereby extending the service life of the watertight duct.

[0035] In addition, the anti-rotation block 3 is made of anti-corrosion metal material, which can maintain stable performance in a variety of corrosive environments and is suitable for connection mechanisms in various harsh environments.

[0036] As a preferred embodiment of this application, see Figure 2 、 Figure 4 and Figure 5The bearing protrusion 30 is provided with an inclined first bearing surface 300, and the lower end of the anti-rotation block 3 is provided with an inclined second bearing surface 31, the first bearing surface 300 and the second bearing surface 31 are parallel, and the second bearing surface 31 abuts against the upper surface of the threaded protrusion 11 of the male joint 1, so as to transmit the pressure received by the bearing protrusion 30 to the male joint 1.

[0037] When the female joint 2 has a tendency of reverse rotation (reverse rotation), an extrusion force will be generated on the anti-rotation block 3, the first bearing surface 300, the second bearing surface 31 and the ballast surface 200 are inclined and parallel, the extrusion force is transmitted to the anti-rotation block 3 through the ballast surface 200 and the first bearing surface 300, and the extrusion force received by the anti-rotation block 3 is transmitted to the male joint 1 through the second bearing surface 31. When the female joint 2 attempts to rotate in reverse, it will receive strong resistance from the anti-rotation block 3, and at the same time, this transmission mechanism increases the stability and anti-reverse rotation capability of the entire connection, avoiding premature damage of the bearing protrusion 30 due to stress concentration. By dispersing stress, the overall life of the bearing protrusion 30 and the anti-rotation block 3 is prolonged. Even in harsh marine environments, such as strong wave impact or changes in seabed topography, this design can ensure the stability and reliability of the connection.

[0038] Referring to Figure 5 , the first bearing surface 300 and the second bearing surface 31 form an angle θ with the plane, and 40°≤θ≤60°.

[0039] When the angle θ is in the range of 40° to 60°, the contact area between the bearing protrusion 30 and the anti-rotation block 3 is relatively large, which helps to disperse stress and reduce the risk of local wear and damage. It can more effectively resist external loads and impacts. If the angle is too small (less than 40°), it cannot provide enough resistance to prevent the female joint 2 from being reversed. If the angle is too large (greater than 60°), it will reduce the overall connection strength. The first bearing surface 300 and the second bearing surface 31 form an angle θ with the plane, and 40°≤θ≤60°. This design can provide better stress distribution, stronger anti-reverse rotation capability and more efficient use of material strength in mechanics. At the same time, this angle setting also needs to match the angle of the original male joint 1 thread slope, in order to ensure the stability of the connection and the convenience of installation.

[0040] As a preferred embodiment of the present application, the bearing protrusion 30 is provided near the second bearing surface 31, and the bearing protrusion 30 is provided with one or more.

[0041] The bearing protrusions 30 are arranged close to the second bearing surface 31, which can significantly reduce the vertical distance between the first bearing surface 300 and the second bearing surface 31. When subjected to external loads, the force can be more directly and efficiently transmitted to the male connector 1. The arrangement of multiple bearing protrusions 30 can further disperse stress and improve the overall strength of the connection structure. In the case of extreme loads or complex stress states, the multiple bearing protrusions 30 can better resist deformation and damage.

[0042] As a preferred embodiment of the present application, refer to Figure 2 、 Figure 3 and Figure 4 The anti-rotation block 3 is provided with a boss 32 extending towards both sides, and the boss 32 forms a stepped surface with the anti-rotation block 3 itself. The positioning groove 100 is provided with an opening towards the female connector 2, and the width of the opening is smaller than the internal width of the positioning groove 100. This ensures that the anti-rotation block 3 can smoothly enter the positioning groove 100, and also limits its movement in a certain direction. The total width of the anti-rotation block 3 and the boss 32 is designed to be greater than the width of the opening. When the anti-rotation block 3 is completely inserted into the positioning groove 100, the stepped surface will abut against the inner wall surface of the positioning groove 100. This abutment not only prevents the anti-rotation block 3 from coming out, but also forms an additional force transmission path. When the anti-rotation block 3 is subjected to external loads, these loads can be effectively transmitted to the positioning groove 100 and then to the male connector 1 through the stepped surface. Through the close fit of the stepped surface and the inner wall surface of the positioning groove 100, the entire connection mechanism is more complete and stable in structure. This helps to reduce the relative movement between the connected parts, thereby improving the durability and reliability of the connection.

[0043] As a preferred embodiment of the present application, the upper thickness of the anti-rotation block 3 is greater than the lower thickness. After the bearing protrusion 30 is inserted into the matching groove 20, the intersection position of the upper and lower parts of the anti-rotation block 3 abuts against the upper end surface of the female connector 2. This forms a structure that limits the movement position. This limitation not only prevents the anti-rotation block 3 from moving and misaligning during the connection process, but also enhances the stability of the entire connection mechanism.

[0044] As a preferred embodiment of the present application, the matching groove 20 is provided with a female connector 2 arc surface 301 on the side facing the male connector 1, and the bearing protrusion 30 is provided with an arc surface 301 that matches the female connector 2 arc surface 301. The arc surface 301 is designed to have a certain elasticity and adaptability, which can accommodate a certain degree of tolerance variation, thereby improving the compatibility and flexibility of the connection. At the same time, it makes the bearing protrusion 30 better resist deformation when subjected to stress, maintaining the stability and reliability of the connection.

[0045] As a preferred embodiment of the present application, the anti-rotation block 3 is provided with a positioning threaded hole 33 at the upper portion, and the positioning groove 100 is provided with a positioning hole 101, and the bolt passes through the positioning threaded hole 33 and enters the positioning hole 101 to fix the anti-rotation block 3 and the male connector 1.

[0046] As a preferred embodiment of the present application, the anti-rotation block 3 is provided with a dismounting groove 34 at the upper portion to facilitate the dismounting of the anti-rotation block 3.

[0047] The anti-rotation block 3 is installed as follows:

[0048] The male and female connectors 2 are screwed together.

[0049] The anti-rotation block 3 is inserted into the positioning groove 100 of the male connector 1 and is knocked down by a small hammer.

[0050] The anti-rotation block 3 is axially slid along the male connector 1 until the second bearing surface 31 at the lower end of the anti-rotation block 3 abuts against the upper surface of the threaded protrusion 11 of the male connector 1, the bearing protrusion 30 enters the matching groove 20, and the pressure bearing surface 200 abuts against the first bearing surface 300.

[0051] The anti-rotation block 3 is fixed by using an internal hexagonal jack, the internal hexagonal jack is tightened, the stepped surface of the anti-rotation block 3 and the boss 32 abuts against the inner wall surface of the positioning groove 100, the end of the internal hexagonal jack enters the matching positioning hole 101 of the male connector 1, and the sliding of the anti-rotation block 3 caused by force is prevented.

[0052] When dismounting, the internal hexagonal jack is unscrewed, then a flat object is inserted into the dismounting groove 34, and the anti-rotation block 3 is knocked out obliquely upward.

[0053] The parts not mentioned in the present application can be realized by using or referring to the existing technology.

[0054] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of various changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A watertight pipe joint anti-rotation device, characterized in that: It includes an anti-rotation block, which is arranged between the male joint and the female joint. A load-bearing protrusion is provided on the lower part of the anti-rotation block. The locking protrusion of the male joint is provided with multiple positioning grooves. The groove depth of the positioning groove exceeds the thickness of the anti-rotation block. An annular matching groove is provided on the inner wall of the female joint. After the male joint and the female joint are threaded together, the anti-rotation block is inserted into the positioning groove and can be moved toward the female joint until the load-bearing protrusion is stuck in the matching groove of the female joint, fixing the anti-rotation block and the male joint to prevent axial displacement or rotation between the male joint and the female joint.

2. The anti-rotation device for watertight pipe joint according to claim 1, characterized in that: The bearing protrusion is provided with an inclined first bearing surface, and the lower end of the anti-rotation block is provided with an inclined second bearing surface. The first bearing surface and the second bearing surface are parallel, and the second bearing surface abuts against the upper surface of the threaded protrusion of the male joint to transfer the pressure exerted on the bearing protrusion to the male joint.

3. The anti-rotation device for watertight pipe joint according to claim 2, characterized in that: The positioning groove is provided with a ballast surface, which contacts the first bearing surface and is arranged in parallel.

4. The anti-rotation device for watertight pipe joint according to claim 2, characterized in that: An included angle θ between the first bearing surface and the second bearing surface and the plane satisfies 40°≤θ≤60°.

5. The anti-rotation device for watertight pipe joint according to claim 2, characterized in that: The bearing protrusion is arranged close to the second bearing surface, and the bearing protrusion is arranged in one or more rows.

6. The anti-rotation device for a watertight conductor joint according to claim 1, characterized in that: The anti-rotation block is provided with bosses extending toward both sides, and the bosses and the anti-rotation block form a step surface. The positioning groove is provided with an opening smaller than its internal width toward the female joint. The width of the anti-rotation block is less than or equal to the opening width and the total width of the anti-rotation block and the boss is greater than the opening width. The step surface abuts against the inner wall surface of the positioning groove.

7. The anti-rotation device for a watertight conductor joint according to claim 1, characterized in that: The thickness of the upper part of the anti-rotation block is greater than that of the lower part. After the bearing protrusion is inserted into the matching groove, the intersection of the upper and lower parts of the anti-rotation block abuts against the upper end surface of the female joint.

8. The anti-rotation device for a watertight conductor joint according to claim 1, characterized in that: The side of the matching groove facing the male connector is a female connector arc surface, and the bearing protrusion is provided with an arc surface adapted to the female connector arc surface.

9. The anti-rotation device for a watertight conductor joint according to claim 1, characterized in that: A positioning threaded hole is provided on the upper part of the anti-rotation block, and a positioning hole is provided in the positioning groove. Bolts pass through the positioning threaded hole and enter the positioning hole to fix the anti-rotation block and the male joint.

10. The anti-rotation device for a watertight conductor joint according to claim 1, characterized in that: A disassembly slot is provided on the upper part of the anti-rotation block to facilitate the disassembly of the anti-rotation block.

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