Suspension device of vertical pipe and installation method of suspension device

Abstract

The invention relates to a suspension device of a stand pipe and a mounting method thereof, the suspension device comprises a stand pipe butt joint assembly and a pile leg fixing assembly, the stand pipe butt joint assembly comprises a short pipe, a plurality of fins are arranged on the outer wall of the short pipe, and the plurality of fins are annularly fixed on the outer wall of the short pipe to form a fin ring; the pile leg fixing assembly comprises a fin ring sleeve, and a welding fixing plate is arranged on the back face of the fin ring sleeve. The inner wall of the fin ring sleeve is arranged on a fin ring of the vertical pipe butt joint assembly in a sleeving mode. Wherein the welding fixing plate is an arc-shaped plate and is used for being welded on the outer wall of a pile leg of the ocean platform; the upper end opening and the lower end opening of the short pipe are used for being in butt joint with the upper vertical pipe and the lower vertical pipe correspondingly, so that the upper vertical pipe and the lower vertical pipe are connected into a whole pipe which is through from top to bottom through the short pipe, and the whole pipe is hung on a pile leg. According to the efficient installation method of the vertical pipe, efficient installation of the vertical pipe suspension is achieved, the installation difficulty is remarkably reduced, and the problem that the difficulty is high when the vertical pipe is installed through a suspension flange at present is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering equipment, and in particular to a suspension device for a riser and an installation method thereof. Background Art

[0002] The existing riser installation generally uses a hanging flange as the load-bearing device of the entire riser, which requires completing various processes such as marine organism cleaning and alignment. The installation process is relatively complicated, which is not only time-consuming and labor-intensive, but also has a high overall difficulty. Summary of the invention

[0003] The object of the present invention is to provide a suspension device for a riser and an installation method thereof, so as to solve the problem that it is difficult to install the riser by using a suspension flange at present.

[0004] To achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention discloses a suspension device for a riser, comprising: A riser butt joint assembly comprises a short tube, a plurality of fins are arranged on the outer wall of the short tube, and the plurality of fins are annularly fixed on the outer wall of the short tube to form a fin ring; The pile leg fixing assembly comprises a rib ring sleeve, and a welding fixing plate is arranged on the back of the rib ring sleeve; The inner wall of the fin ring sleeve is sleeved on the fin ring of the riser docking assembly; Wherein, the welding fixing plate is an arc-shaped plate, which is used for welding on the outer wall of the pile leg of the offshore platform; The upper end and the lower end of the short pipe are used to connect the upper riser and the lower riser respectively, so that the upper riser and the lower riser are connected through the short pipe to form a whole pipe that is connected from top to bottom and is suspended on the pile leg.

[0005] Preferably, the rib ring sleeve has a gap to form a non-closed arc sleeve.

[0006] Preferably, the top end of the fin ring is configured as a bell mouth.

[0007] Preferably, each rib is thick at the top and thin at the bottom, so that the ring wall of the rib ring formed thereby is thick at the top and thin at the bottom; accordingly, the inner wall of the rib ring sleeve has a large upper end port and a lower bottom end port; when the inner wall of the rib ring sleeve is sleeved on the rib ring, the inner wall of the rib ring sleeve fits exactly with and is locked with the outer wall of the rib ring.

[0008] Preferably, anti-slip stripes are provided on the outer surface of each of the ribs.

[0009] Preferably, the rib ring sleeve and the welded fixing plate are connected by a connecting assembly, and the connecting assembly includes three connecting transverse plates, a first connecting vertical plate, and a second connecting vertical plate. The three connecting transverse plates are horizontally arranged, and the two ends of each connecting transverse plate are respectively fixed to the rib ring sleeve and the welded fixing plate, so as to connect the rib ring sleeve and the welded fixing plate together; the first connecting vertical plate is arranged between the two upper connecting transverse plates, and the two sides are respectively fixed to the rib ring sleeve and the welded fixing plate, and the second connecting vertical plate is arranged between the two lower connecting transverse plates, and the two sides are respectively fixed to the rib ring sleeve and the welded fixing plate.

[0010] Preferably, the bottom of the welding fixing plate extends downward to form an extension portion, and the extension portion of the welding fixing plate and the bottom end of the rib ring sleeve are connected through a triangular connecting plate, wherein the triangular connecting plate is a right-angle plate, and two right-angle sides of the triangular connecting plate are respectively fixed to the extension portion of the welding fixing plate and the bottom end of the rib ring sleeve.

[0011] Preferably, a plurality of weight-reducing holes are evenly spaced on the welding fixing plate.

[0012] Preferably, a plurality of ribs are evenly spaced on the outer wall of the rib ring sleeve.

[0013] In a second aspect, the present invention further discloses a method for installing a riser suspension device, which is used to install the riser suspension device, comprising: Step A: Welding the welding fixing plate to the outer wall of the pile leg; Step B: After installing the offshore platform, the pile legs are arranged at predetermined positions; Step C: connecting the upper riser and the lower riser to the upper and lower ends of the short pipe respectively, and then connecting the upper riser and the lower riser through the short pipe to form a whole pipe that is connected from top to bottom; Step D: The inner wall of the fin ring sleeve is sleeved on the fin ring of the riser docking assembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (I) The present invention discloses a suspension device for a riser, comprising a riser docking assembly and a pile leg fixing assembly, wherein the riser docking assembly comprises a short tube, a plurality of ribs are arranged on the outer wall of the short tube, and the plurality of ribs are circumferentially fixed on the outer wall of the short tube to form a rib ring; the pile leg fixing assembly comprises a rib ring sleeve, a welding fixing plate is arranged on the back of the rib ring sleeve; the inner wall of the rib ring sleeve is sleeved on the rib ring of the riser docking assembly; wherein the welding fixing plate is an arc-shaped plate, which is used for welding on the outer wall of the pile leg of an offshore platform; the upper port and the lower port of the short tube are respectively used for docking the upper riser and the lower riser, and then the upper riser and the lower riser are connected through the short tube into a whole pipe that is interpenetrating from top to bottom, and is suspended on the pile leg.

[0015] (ii) The present invention discloses a method for installing a suspension device for a riser, comprising: welding a welding fixing plate to the outer wall of a pile leg; after installing the offshore platform, setting the pile leg at a predetermined position; docking an upper riser and a lower riser to the upper port and the lower port of the short pipe respectively, and then connecting the upper riser and the lower riser through the short pipe to form a whole pipe that is interlinked from top to bottom; the inner wall of the fin ring sleeve is sleeved on the fin ring of the riser docking assembly, thereby achieving efficient installation of the suspension device for the riser, significantly reducing the difficulty of installation, and solving the problem of high difficulty in installing the riser using the suspension flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a standpipe suspension device provided in Example 1 of the present invention; Figure 2 is a top view of a suspension device for a riser provided in Example 1 of the present invention; Figure 3 is a three-dimensional view of a riser docking assembly provided in Example 1 of the present invention; Figure 4 is a cross-sectional schematic diagram of a riser docking assembly provided in Example 1 of the present invention; Figure 5 is a three-dimensional view of a pile leg fixing assembly provided in Example 1 of the present invention; Figure 6 is a front view of the pile leg fixing assembly provided in Example 1 of the present invention; Figure 7 is a side view of the pile leg fixing assembly provided in Example 1 of the present invention; Figure 8 It is a cross-sectional view of the pile leg fixing assembly provided in Example 1 of the present invention along the mid-vertical plane of the notch.

[0017] Description of reference numerals: 1-standpipe docking assembly, 10-rib, 101-anti-slip stripe; 11-short pipe, 111-upper port, 112-lower port; 12-rib ring; 2-pile leg fixing assembly, 20-rib ring sleeve, 200-conical inner wall, 201-bell mouth, 202-ribs; 21-welded fixing plate, 210-weight reduction hole; 31 - connecting horizontal plate, 32 - first connecting vertical plate, 33 - second connecting vertical plate, 34 - triangular connecting plate. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0019] In order to solve the problem that it is difficult to install a riser using a hanging flange, in a first aspect, the present invention discloses a hanging device for a riser, including a riser docking assembly and a pile leg fixing assembly, the riser docking assembly including a short tube, a plurality of ribs are arranged on the outer wall of the short tube, and the plurality of ribs are circumferentially fixed on the outer wall of the short tube to form a rib ring; the pile leg fixing assembly includes a rib ring sleeve, a welding fixing plate is arranged on the back side of the rib ring sleeve; the inner wall of the rib ring sleeve is sleeved on the rib ring of the riser docking assembly; wherein the welding fixing plate is an arc-shaped plate, which is used for welding on the outer wall of the pile leg of the offshore platform; the upper port and the lower port of the short tube are respectively used for docking the upper riser and the lower riser, so that the upper riser and the lower riser are connected through the short tube into a whole pipe that is connected from top to bottom and is hung on the pile leg. In a second aspect, the present invention discloses an efficient installation method for a riser, comprising: welding a welding fixing plate to an outer wall of a pile leg; after installing the offshore platform, setting the pile leg at a predetermined position; docking an upper riser and a lower riser to an upper port and a lower port of the short pipe respectively, and then connecting the upper riser and the lower riser through the short pipe to form a whole pipe that is interconnected from top to bottom; the inner wall of the fin ring sleeve is sleeved on the fin ring of the riser docking assembly, thereby achieving efficient installation of the riser suspension device, significantly reducing the installation difficulty, and solving the problem of high difficulty in installing the riser using a suspension flange.

[0020] Embodiment 1: A suspension device for a riser Embodiment 1 of the present invention provides a suspension device for a riser, and its structure is described in detail below with reference to the accompanying drawings.

[0021] refer to Figures 1 to 8 The riser suspension device includes a riser docking assembly 1 and a pile leg fixing assembly 2. The riser docking assembly 1 comprises a short tube 11, on the outer wall of which a plurality of fins 10 are arranged, and the plurality of fins 10 are annularly fixed on the outer wall of the short tube 11 to form a fin ring 12; The pile leg fixing assembly 2 comprises a rib ring sleeve 20, and a welding fixing plate 21 is arranged on the back of the rib ring sleeve 20; The inner wall of the fin ring sleeve 20 is sleeved on the fin ring 12 of the riser docking assembly 1; Wherein, the welding fixing plate 21 is an arc-shaped plate, which is used for welding on the outer wall of the pile leg of the offshore platform; The upper end 111 and the lower end 112 of the short tube 11 are used to connect the upper riser and the lower riser respectively, so that the upper riser and the lower riser are connected through the short tube 11 to form a whole pipe that is connected from top to bottom and is suspended on the pile leg.

[0022] In order to facilitate the inner wall of the fin ring sleeve 20 to be sleeved on the fin ring 12, the fin ring sleeve 20 is provided with a gap to form a non-closed arc sleeve.

[0023] In order to facilitate the installation of the fin ring sleeve 20 and the fin ring 12 , the top end of the fin ring sleeve 20 is configured as a bell mouth 201 .

[0024] In order to enhance the friction between the rib ring sleeve 20 and the rib ring 12, each rib 10 is thick at the top and thin at the bottom, so that the ring wall of the rib ring 12 is thick at the top and thin at the bottom; accordingly, the inner wall of the rib ring sleeve 20 has a large upper end and a low bottom end; when the inner wall of the rib ring sleeve 20 is sleeved on the rib ring 12, the inner wall of the rib ring sleeve 20 fits exactly with and is locked with the outer wall of the rib ring 12.

[0025] In order to further enhance friction, an anti-slip stripe 101 is provided on the outer surface of each rib 10 .

[0026] As a specific embodiment, the rib ring 20 and the welded fixing plate 21 are connected through a connecting assembly, and the connecting assembly includes three connecting transverse plates 31, a first connecting vertical plate 32, and a second connecting vertical plate 33. The three connecting transverse plates 31 are horizontally arranged, and the two ends of each connecting transverse plate 31 are respectively fixed to the rib ring 20 and the welded fixing plate 21, so as to connect the rib ring 20 and the welded fixing plate 21 together; the first connecting vertical plate 32 is arranged between the upper two connecting transverse plates 31, and the two sides are respectively fixed to the rib ring 20 and the welded fixing plate 21, and the second connecting vertical plate 33 is arranged between the lower two connecting transverse plates 31, and the two sides are respectively fixed to the rib ring 20 and the welded fixing plate 21.

[0027] Furthermore, the bottom of the welding fixing plate 21 extends downward to form an extension portion, and the extension portion of the welding fixing plate 21 is connected to the bottom end of the rib ring 20 via a triangular connecting plate 34. The triangular connecting plate 34 is a right-angled plate, and two right-angled sides of the triangular connecting plate 34 are respectively fixed to the extended portion of the welding fixing plate 21 and the bottom end of the rib ring sleeve 20 .

[0028] In order to reduce the deadweight of the welding fixing plate 21 , a plurality of weight-reducing holes 210 are evenly spaced apart on the welding fixing plate 21 .

[0029] In order to enhance the rigidity of the rib ring 20 , a plurality of ribs 202 are evenly spaced apart on the outer wall of the rib ring 20 .

[0030] Embodiment 2: A method for installing a suspension device for a riser Embodiment 2 of the present invention provides a method for installing a suspension device for a riser, which is used to install the suspension device for the riser provided in Embodiment 1, and the method comprises: Step A: welding the welding fixing plate 21 to the outer wall of the pile leg; Step B: After installing the offshore platform, the pile legs are set at predetermined positions.

[0031] Specifically, the predetermined location is an offshore oil field.

[0032] Step C: docking the upper riser and the lower riser to the upper port 111 and the lower port 112 of the short tube 11, respectively, and then connecting the upper riser and the lower riser through the short tube 11 to form a whole tube that is connected from top to bottom; Step D: The inner wall of the fin ring sleeve 20 is sleeved on the fin ring 12 of the riser docking assembly 1 .

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suspension device for a riser, characterized in that: include A riser butt joint assembly (1) comprises a short tube (11), a plurality of fins (10) being arranged on the outer wall of the short tube (11), and the plurality of fins (10) being circumferentially fixed on the outer wall of the short tube (11) to form a fin ring (12); The pile leg fixing assembly (2) comprises a rib ring sleeve (20), wherein a welding fixing plate (21) is provided on the back side of the rib ring sleeve (20); The inner wall of the fin ring sleeve (20) is sleeved on the fin ring (12) of the riser docking assembly (1); Wherein, the welding fixing plate (21) is an arc-shaped plate, and is used for welding to the outer wall of the pile leg of the offshore platform; The upper end (111) and the lower end (112) of the short tube (11) are respectively used to connect the upper riser and the lower riser, so that the upper riser and the lower riser are connected through the short tube (11) to form a whole tube that is connected from top to bottom and is suspended on the pile leg.

2. The suspension device for a riser according to claim 1, characterized in that: The rib ring sleeve (20) has a gap, forming a non-closed arc sleeve.

3. The suspension device for a riser according to claim 1, characterized in that: The top end of the rib ring sleeve (20) is configured as a bell mouth (201).

4. The suspension device for a riser according to claim 1, characterized in that: Each of the ribs (10) has a thick top and a thin bottom, so that the ring wall of the rib ring (12) formed thereby is thick at the top and thin at the bottom; Correspondingly, the inner wall of the fin ring sleeve (20) has a large upper end port and a lower bottom end port; When the inner wall of the rib ring sleeve (20) is sleeved on the rib ring (12), the inner wall of the rib ring sleeve (20) and the outer wall of the rib ring (12) fit exactly and are locked.

5. The suspension device for a riser according to claim 4, characterized in that: An anti-slip stripe (101) is provided on the outer surface of each rib (10).

6. The suspension device for a riser according to claim 1, characterized in that: The rib ring sleeve (20) and the welding fixing plate (21) are connected via a connecting assembly. The connection assembly comprises three connecting transverse plates (31), a first connecting vertical plate (32), and a second connecting vertical plate (33). Three connecting transverse plates (31) are arranged horizontally, and two ends of each connecting transverse plate (31) are respectively fixed to the rib ring sleeve (20) and the welding fixing plate (21), so as to connect the rib ring sleeve (20) and the welding fixing plate (21) together; The first connecting vertical plate (32) is arranged between the two upper connecting horizontal plates (31), and two sides thereof are respectively fixed on the rib ring sleeve (20) and the welding fixing plate (21). The second connecting vertical plate (33) is arranged between the two lower connecting horizontal plates (31), and two sides thereof are respectively fixed on the rib ring sleeve (20) and the welding fixing plate (21).

7. The suspension device for a riser according to claim 6, characterized in that: The bottom of the welding fixing plate (21) extends downward to form an extension portion. The extended portion of the welding fixing plate (21) is connected to the bottom end of the rib ring sleeve (20) via a triangular connecting plate (34). The triangular connecting plate (34) is a right-angled plate, and two right-angled sides of the triangular connecting plate (34) are respectively fixed to the extension portion of the welding fixing plate (21) and the bottom end of the rib ring sleeve (20).

8. The suspension device for a riser according to claim 5, characterized in that: A plurality of weight-reducing holes (210) are evenly spaced on the welding fixing plate (21).

9. The suspension device for a riser according to claim 1, characterized in that: A plurality of ribs (202) are evenly spaced on the outer wall of the rib ring sleeve (20).

10. A method for installing a riser suspension device, used for installing the riser suspension device according to any one of claims 1 to 9, characterized in that: include Step A: welding the welding fixing plate (21) to the outer wall of the pile leg; Step B: After installing the offshore platform, the pile legs are arranged at predetermined positions; Step C: connecting the upper riser and the lower riser to the upper port (111) and the lower port (112) of the short tube (11), respectively, and then connecting the upper riser and the lower riser through the short tube (11) to form a whole tube that is connected from top to bottom; Step D: The inner wall of the fin ring sleeve (20) is sleeved on the fin ring (12) of the riser docking assembly (1).

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