Steel-in-steel subsea thermal pipe support ring

Abstract

The application provides a steel sleeve steel submarine heat preservation pipe supporting ring, which is characterized by comprising a body composed of two half tiles, a heat preservation layer arranged on the inner side of the body, and a plurality of sliding strips arranged on the outer side of the body in the circumferential direction, each half tile comprises a semicircular main body, inwardly folded butt joints are arranged at the two ends of the main body, and the butt joints on the same side of the two half tile split structures are fixed through a connecting assembly; the butt joints are embedded into grooves at the end of the heat preservation layer, so that the end portions of the heat preservation layers on the same side of the two half tiles are extruded and kept closed after the two half tiles are assembled; hollow grooves are arranged on the main body and correspond to the positions of the butt joints, and connecting assembly accommodating grooves are arranged on the heat preservation layer on the inner side of the main body and correspond to the hollow grooves. The application is used as a sliding supporting structure when an inner pipe is arranged in a steel sleeve steel heat preservation pipeline, sliding cooperation between the sliding strips and the outer pipe is achieved, the pipe is smoothly arranged, and the pipe and the heat preservation structure between the pipes are effectively protected, so that the construction efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of subsea pipeline technology, and in particular relates to a support ring for a steel-clad steel subsea insulated pipe. Background Technology

[0002] Subsea pipelines are crucial facilities for offshore oil and gas development. During oil extraction, oil and gas typically need to be extracted from underground and transported to surface processing plants. Currently, the most commonly used subsea pipelines are steel-jacketed insulated pipes, with the insulation layer placed between two steel pipes. This insulation layer is usually made of polyurethane foam, which has inherent limitations. Due to the long pipeline distances, the insulation layer is generally laid in sections, making it difficult to ensure a proper bond between adjacent insulation sections. This often results in heat loss at the joint points. Furthermore, during the manufacturing process of insulated pipelines, jamming frequently occurs during the insertion of the inner pipe into the outer pipe, affecting work efficiency and even causing damage to either the inner or outer pipe. Therefore, it is necessary to improve the structure of insulated pipelines. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a steel-clad steel submarine insulation pipe support ring.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] A steel-clad steel submarine thermal insulation pipe support ring includes a main body composed of two halves. An insulation layer is provided inside the main body, and several sliding strips are arranged circumferentially on the outer side of the main body. Each half-tile includes a semi-circular main body, with inwardly folded docking portions at both ends. The docking portions on the same side of the two halves are fixed by a connecting component. The docking portions are embedded in grooves at the ends of the insulation layer, so that after the two halves are assembled, the insulation layer ends on the same side of both halves are pressed together and kept closed. A perforated groove is provided on the main body corresponding to the docking portion, and a connecting component receiving groove is provided on the insulation layer inside the main body corresponding to the perforated groove.

[0006] Furthermore, all edges of the slider are rounded, and each slider has an arc-shaped guide structure at both the front and rear ends.

[0007] Furthermore, the slider is made of nylon.

[0008] Furthermore, the slide bar is fixed to the half-tile by screws, and a recess is provided on the outer surface of the slide bar, with the nut part of the screw submerged in the recess.

[0009] Furthermore, the main body and the docking parts on both sides are integrally formed structures.

[0010] Furthermore, the insulation layer is made of calcium silicate material.

[0011] Furthermore, an open groove for embedding the mating part is provided at the outer end face of the end of the insulation layer. One side surface of the mating part is in contact with the bottom surface of the groove on the end of the insulation layer, while the other side surface is exposed on the outside of the insulation layer.

[0012] Furthermore, on the outer surface of the insulation layer, a groove is provided near its end for the outer opening of the mating part to be inserted, and the two sides of the mating part are respectively attached to the two side walls of the groove.

[0013] Compared with existing technologies, the present invention has the following advantages:

[0014] This invention creates a sliding support structure for the inner pipe of a steel-jacketed insulated pipeline. By utilizing the sliding cooperation between the sliding strip and the outer pipe, the pipe can be smoothly inserted without jamming. This effectively protects the pipeline and the insulation structure between the pipelines, improves construction efficiency, and after the subsea pipeline is laid, the support device can effectively support the outer pipe, resulting in stronger pressure resistance and higher structural stability, laying a good foundation for fully utilizing the insulation performance. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure created by this invention;

[0017] Figure 2 A schematic diagram of the half-tile portion in the present invention;

[0018] Figure 3 A three-dimensional structural schematic diagram created for this invention;

[0019] Figure 4 A schematic diagram of an embodiment of the present invention featuring an insulation layer with an open groove;

[0020] Figure 5 A schematic diagram of an embodiment of the present invention featuring an insulation layer with an externally open groove;

[0021] Figure 6 for Figure 4 A schematic diagram showing a half-watt-hour device installed in the middle;

[0022] Figure 7 for Figure 5 A half-watt-hour diagram is installed in the middle;

[0023] Figure 8 This is a schematic diagram of the insulation layer having a cavity in the middle of the invention.

[0024] Figure 9 This is a schematic diagram of a slider with an overlapping portion in an embodiment of the present invention. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "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 indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] A steel-jacketed subsea insulation pipe support ring, such as Figures 1 to 9As shown, the body comprises two halves of a tile 1. An insulation layer 2 is located inside the body, and several sliding strips 3 are arranged circumferentially on the outer side of the body. Each half of the tile includes a semi-circular main body 4, with inwardly folded connecting portions 5 at both ends. Connecting components 6 secure the connecting portions on the same side of the two halves. The connecting portions are embedded in grooves at the ends of the insulation layer, ensuring that after the two halves are assembled, the insulation layer ends on the same side are pressed together and remain sealed. A perforated groove 7 is provided on the main body corresponding to the connecting portion, and a connecting component receiving groove 8 is provided on the insulation layer inside the main body corresponding to the perforated groove. The main body and the connecting portions on both sides are integrally formed. For example, the sliding strips are made of nylon. The insulation layer is made of calcium silicate material.

[0030] Typically, all edges of the slider are rounded, and each slider (in the axial direction of the body) has an arc-shaped guide structure at both ends. The slider is fixed to the half-bearing by screws 9, and the outer surface of the slider has a recessed platform. The nut of the screw is submerged in the recessed platform, so that the screw will not interfere with the outer tube during the installation of the inner tube.

[0031] In an optional embodiment, such as Figure 4 and 6 As shown, an open groove 10 for embedding the mating part is provided at the outer end face of the aforementioned insulation layer. One side surface of the mating part is in contact with the bottom surface of the groove on the end of the insulation layer, while the other side surface is exposed outside the insulation layer (the groove depth is 1 / 2-2 / 3 of the insulation layer thickness, ensuring the structural stability of the insulation layer and guaranteeing sealing reliability and insulation performance after assembly). In another optional embodiment, such as... Figure 5 and 7 As shown, on the outer surface of the insulation layer, near its end, a groove 11 with an open outer opening is provided for the insertion of the mating part. The two sides of the mating part are respectively attached to the two side walls of the groove (the groove depth is 1 / 2-2 / 3 of the insulation layer thickness, ensuring the structural stability of the insulation layer, and after assembly, the insulation layers of the two half-tiles can fit tightly together, ensuring better sealing reliability and insulation performance). This structural design makes the two half-tiles fit more tightly after the support device is installed, resulting in better insulation effect.

[0032] In further improved solutions, such as Figure 8As shown, each sliding strip has an overlapping portion 12 extending outward from its main body at both ends. In the assembled subsea pipeline, the overlapping portions on both sides of the sliding strip overlap the outer side of the aerogel insulation layer on both sides of the support device, so that the support device and the aerogel insulation layer are connected by the sliding strip. This not only improves the safety during the pipe insertion process and avoids the aerogel insulation layer being scratched, but also improves the stability of the connection between the aerogel insulation layer and the support device when applied to the seabed. The support device forms effective support for the outer pipe. The longer sliding strip has a better support effect. The pressure is transmitted to the support device and the aerogel insulation layer through the sliding strip. The pipeline has a stronger ability to resist seawater compression and better structural stability.

[0033] In an optional embodiment, such as Figure 8 As shown, a closed cavity 13 is set inside the insulation layer. For example, the width of this cavity along the radial direction of the support ring is generally 1-3mm, and the width of the cavity (along the radial direction of the support ring) gradually decreases from the middle of the main body to both ends. When the support ring is installed during construction, the half-tiles compress the insulation layer, and the cavity adapts to deformation, which is more conducive to the installation of the support ring. When inserting the pipe, the adaptive deformation of the cavity can minimize the jamming between the support ring (slider) and the inner wall of the outer pipe, making the pipe insertion process smoother. In a further improved scheme, filler can be added to the cavity. The filler can be at least one of asbestos, glass fiber, rubber, hollow glass microspheres, light calcium carbonate, and alumina hollow spheres, and the total amount of filler accounts for 1 / 4-1 / 2 of the cavity volume, which improves the support capacity of the cavity without affecting its adaptive deformation capability.

[0034] This invention creates a sliding support structure for the inner pipe installation in steel-jacketed insulated pipelines. Through the sliding cooperation between the sliding strip and the outer pipe, smooth pipe installation is achieved without jamming, effectively protecting the pipeline and the insulation structure between them, improving construction efficiency. Furthermore, the support ring has an insulation layer designed inside the base component, ensuring good insulation performance at its installation location. After the subsea pipeline is laid, the support device effectively supports the outer pipe, providing stronger compressive strength and higher structural stability, laying a solid foundation for fully utilizing the insulation performance.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel-clad steel subsea thermal insulation pipe support ring, characterized in that: The device comprises a main body consisting of two halves of a tile. An insulation layer is located inside the main body, and several sliding strips are arranged circumferentially on the outer side. Each half of the tile includes a semi-circular main body with inwardly folded joints at both ends. Connecting components secure the joints on the same side of the two halves. The joints are embedded in grooves at the ends of the insulation layer, ensuring that the insulation layers on the same side of the two halves are pressed together and sealed after assembly. A perforated groove is provided on the main body corresponding to the joint, and a connecting component receiving groove is provided on the insulation layer inside the main body corresponding to the perforated groove. A closed cavity is provided inside the insulation layer. The width of the cavity along the radial direction of the support ring gradually decreases from the middle to both ends of the main body. During construction, the half-tiles compress the insulation layer, causing the cavity to deform adaptively to ensure the support ring is properly installed. During pipe insertion, the adaptive deformation of the cavity prevents jamming between the support ring and the inner wall of the outer pipe. Filler is added to the cavity, with the total filler volume accounting for 1 / 4 to 1 / 2 of the cavity volume.

2. The steel-jacketed subsea thermal insulation pipe support ring according to claim 1, characterized in that: All edges of the slider are rounded, and each slider has an arc-shaped guide structure at both the front and rear ends.

3. The steel-jacketed subsea thermal insulation pipe support ring according to claim 1, characterized in that: The slider is made of nylon.

4. The steel-clad steel subsea thermal insulation pipe support ring according to claim 1, characterized in that: The slide bar is fixed to the half-tile by screws, and the outer surface of the slide bar is provided with a recessed platform, with the nut part of the screw submerged in the recessed platform.

5. The steel-clad steel subsea thermal insulation pipe support ring according to claim 1, characterized in that: The main body and the connecting parts on both sides are integrally formed.

6. The steel-clad steel subsea thermal insulation pipe support ring according to claim 1, characterized in that: The insulation layer is made of calcium silicate material.

7. The steel-jacketed subsea thermal insulation pipe support ring according to claim 1, characterized in that: An open groove for embedding the mating part is provided on the outer end face of the end of the insulation layer. One side surface of the mating part is in contact with the bottom surface of the groove on the end of the insulation layer, and the other side surface is exposed on the outside of the insulation layer.

8. The steel-jacketed steel submarine insulation pipe support ring according to claim 1, characterized in that: On the outer surface of the insulation layer, near its end, there is a groove with an outer opening for the insertion of the mating part, and the two sides of the mating part are respectively attached to the two side walls of the groove.

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