Permeable sleeve structure

Abstract

The utility model discloses a permeable sleeve structure which comprises a sleeve body, a first fixing flange is fixedly assembled at the bottom of the sleeve body, a water sealing and mud blocking diaphragm is fixedly assembled between the sleeve body and the first fixing flange, a packer is fixedly assembled on the side wall of an inner cavity of the sleeve body, and a permeable assembly is fixedly assembled on the side wall of the sleeve body. After the sleeve is improved, the inside of the sleeve can be automatically adjusted to enter or move out of the sleeve according to the action of internal and external pressure in the process that the jacket is hoisted and lowered by a crane, and the vertical load in the sleeve can be effectively prevented from being quickly increased in the process that the jacket is completely lowered into the sleeve; and the huge impact generated by the crane jib is reduced, so that the barge and the crane are more stable when hoisting and lowering the jacket, and the safety guarantee of the barge and the crane is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of offshore platform construction technology, specifically to a permeable sleeve structure. Background Technology

[0002] Offshore platforms are working platforms built on the ocean, primarily used for the exploration, extraction, processing, and storage of resources such as oil and natural gas. Depending on their function and operating environment, offshore platforms can be classified into various types, such as fixed platforms (e.g., jacket platforms, gravity platforms) and floating platforms (e.g., semi-submersible platforms). Fixed jacket platforms mainly consist of large steel jacket structures and sleeves. During construction, the sleeves are first inserted into the seabed, then the jacket is hoisted, and the jacket legs are inserted into the sleeves. Subsequently, cement mortar is poured into the sleeves to enhance the stability of the connection between the jacket legs and the sleeves.

[0003] Currently, the sleeves used to fix the guide frame are mostly of two types;

[0004] I. Bottom Single Diaphragm Type: This type mainly involves setting a single mud-blocking diaphragm at the bottom of the sleeve. After the sleeve is inserted and fixed to the seabed, the jacket is then hoisted by a crane and lowered to the bottom of the sleeve. This type of sleeve has the following disadvantages during use: When the jacket is lowered by a crane to the top of the sleeve and below the water surface, seawater will quickly backflow into the sleeve, causing the vertical load inside the sleeve to increase rapidly. This will have a huge impact on the crane boom used to hoist the jacket, affecting the stability of the barge and the crane on the sea surface and posing a safety hazard.

[0005] 2. The double-diaphragm design, with one diaphragm at the bottom and one at the top, allows for buoyancy adjustment of the sleeve during the lowering of the jacket using a crane. This helps to straighten the jacket and lower it smoothly. While this reduces the impact on the barge and crane, it requires timely adjustment of the water level between the diaphragms, resulting in significant time wastage and reduced work efficiency. Utility Model Content

[0006] The purpose of this utility model is to provide a permeable sleeve structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a permeable sleeve structure, comprising a sleeve body, a first fixed flange fixedly assembled at the bottom of the sleeve body, a water-sealing and mud-blocking diaphragm fixedly assembled between the sleeve body and the first fixed flange, a packer fixedly assembled on the inner cavity side wall of the sleeve body, and a permeable component fixedly assembled on the side wall of the sleeve body.

[0008] Preferably, the permeable component includes a permeable pipe, one end of which is fixedly connected to the side wall of the sleeve body, and the other end of which is fixedly fitted with a second fixed flange. A permeable filter is fixedly fitted between the permeable pipe and the second fixed flange.

[0009] Preferably, the permeable pipe is located between the packer and the water-sealing and mud-blocking diaphragm.

[0010] Preferably, the water-permeable filter is a stainless steel metal water-permeable filter.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: A permeable sleeve structure, mainly applied to the improvement of a bottom single diaphragm type sleeve, is provided with a permeable structure on the side wall of the sleeve. Specifically, a permeable pipe is placed between the packer and the water-sealing and mud-blocking diaphragm. By setting the permeable pipe, the traditional bottom single diaphragm type sleeve, which cannot provide water permeability during the lowering of the guide frame, is realized. After the sleeve is improved by this utility model, the interior of the sleeve can automatically adjust the entry or exit of seawater according to the internal and external pressures during the lowering of the guide frame by the crane. During the complete lowering of the guide frame into the sleeve, the vertical load inside the sleeve can be effectively prevented from increasing rapidly, reducing the huge impact generated by the crane boom. This makes the barge and crane more stable when lifting and lowering the guide frame, and increases the safety of the barge and crane. At the same time, compared with the double diaphragm type sleeve structure, this utility model can reduce the steps of adjusting the pressure inside the sleeve during the lowering of the guide frame, and can quickly realize the lowering of the guide frame, improving the assembly efficiency between the guide frame and the sleeve. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention.

[0013] Figure 2 for Figure 1 Detailed image of point a in the image.

[0014] In the figure: 1. Sleeve body; 2. First fixed flange; 3. Water sealing and mud-blocking diaphragm; 4. Packer; 5. Water permeable component; 51. Water permeable pipe; 52. Second fixed flange; 53. Water permeable filter. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a permeable sleeve structure, including a sleeve body 1, a first fixing flange 2 detachably fixed to the bottom of the sleeve body 1 by fixing bolts and fixing nuts, and a water-sealing and mud-blocking diaphragm 3 installed between the bottom of the sleeve body 1 and the first fixing flange 2. When the sleeve body 1 is inserted into seawater for bottoming operation, the water-sealing and mud-blocking diaphragm 3 prevents seawater from flowing back into the sleeve body 1, affecting the subsequent insertion of the guide frame and the pouring of concrete.

[0017] A packer 4 is fixedly installed in the inner cavity of the sleeve body 1. The packer 4 is located between the guide frame and the sleeve body 1. When the guide frame is inserted into the sleeve body 1, the packer 4 seals the space between the guide frame and the sleeve body 1, which facilitates the pouring of concrete to the top of the packer 4, thereby limiting and fixing the connection position between the guide frame and the sleeve body 1.

[0018] like Figure 1 and Figure 2 As shown, a water-permeable component 5 is fixedly assembled on the side wall of the sleeve body 1. The water-permeable component 5 includes a water-permeable pipe 51, which is fixedly connected to the side wall of the sleeve body 1. The water-permeable pipe 51 is disposed between the water-sealing and mud-blocking diaphragm 3 and the packer 4. The end of the water-permeable pipe 51 is detachably and fixedly assembled with a second fixed flange 52 by fixing bolts and fixing nuts. A water-permeable filter 53 is fixedly assembled between the water-permeable pipe 51 and the second fixed flange 52. The water-permeable filter 53 is made of stainless steel, which gives it higher strength and can improve its stability during use.

[0019] The sleeve structure designed in this invention is suitable for sleeves with a single diaphragm at the bottom. During its use, a water-permeable pipe 51 is installed on the side wall of the sleeve body 1, allowing seawater to permeate into the sleeve body 1 after it is inserted into the water. A water-permeable filter 53 is also installed to filter impurities in the seawater and silt from the seabed, preventing impurities and silt from entering the sleeve body 1. Due to the water-permeable structure, when the sleeve body 1 is inserted into the seabed for bottoming and when the subsequent guide frame is inserted into the sleeve body 1, seawater can freely and continuously enter or leave the sleeve body 1 based on the pressure difference between the inside and outside of the sleeve body 1. This effectively prevents overload of the crane when the sleeve body 1 is fully submerged, improving the stability of the crane during the lowering of the sleeve body 1. Compared with the double-diaphragm sleeve design, the guide frame can be lowered without water injection, improving the connection and assembly efficiency between the guide frame and the sleeve.

Claims

1. A water permeable sleeve structure comprising a sleeve body (1), characterised in that: The bottom of the sleeve body (1) is fixedly provided with a first fixed flange (2), a water sealing and mud blocking diaphragm (3) is fixedly arranged between the sleeve body (1) and the first fixed flange (2), the inner cavity side wall of the sleeve body (1) is fixedly provided with a packer (4), and the side wall of the sleeve body (1) is fixedly provided with a water permeable assembly (5).

2. A water permeable sleeve structure according to claim 1, wherein: The water permeable assembly (5) comprises a water permeable pipe (51), one end of the water permeable pipe (51) is fixedly connected to the side wall of the sleeve body (1), the other end of the water permeable pipe (51) is fixedly provided with a second fixed flange (52), and a water permeable filter plate (53) is fixedly arranged between the water permeable pipe (51) and the second fixed flange (52).

3. A water permeable sleeve construction according to claim 2, characterized in that: The water permeable pipe (51) is located between the packer (4) and the water sealing and mud blocking diaphragm (3).

4. A water permeable sleeve construction according to claim 2, characterized in that: The water permeable filter plate (53) is a stainless steel water permeable filter plate.

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