Mud blocking diaphragm

Abstract

The present application belongs to the field of offshore oil engineering, and particularly relates to a mud blocking diaphragm installed at the bottom of a skirt pile sleeve, which comprises a water-permeable filter diaphragm, a rigid framework, a sealing rubber flange connecting ring and a metal flange, the water-permeable filter diaphragm is internally provided with the rigid framework, and the edges of the water-permeable filter diaphragm and the rigid framework are wrapped with the sealing rubber flange connecting ring; the sealing rubber flange connecting ring is provided with the metal flanges on the upper and lower sides, the metal flange located at the upper side is fixedly connected to the bottom of the skirt pile sleeve, the metal flange located at the lower side is fixedly connected with the metal flange located at the upper side, and the edges of the water-permeable filter diaphragm and the rigid framework and the sealing rubber flange connecting ring are clamped and fixed. The mud at the bottom of the skirt pile sleeve is effectively filtered, so that the mud blocking diaphragm no longer needs to bear a large pressure, the outer diameter size of the skirt pile sleeve is no longer limited, and the mud blocking diaphragm product with a large size skirt pile sleeve diameter can be realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of offshore oil engineering, in particular to a mud blocking diaphragm. BACKGROUND

[0002] At present, the pile foundation fixed jacket of offshore platform is generally installed by ship transportation. With the diversification and integration of the upper block of offshore platform, the volume and weight of jacket, skirt pile sleeve and pile are continuously increasing, and ship transportation not only increases the engineering cost, but also wastes a lot of resources. The sealing diaphragm is applied to the sealing of the skirt pile sleeve of the jacket, and assists the righting installation of the jacket and the skirt pile sleeve. The steel pile will pierce the sealing diaphragm when the steel pile is installed. The existing sealing diaphragm needs to bear a large pressure due to its water impermeability, which cannot guarantee the overall structural pressure resistance of the sealing diaphragm, and also limits the outer diameter size of the skirt pile sleeve. SUMMARY

[0003] In order to solve the above problems of the existing sealing diaphragm, the purpose of the present application is to provide a mud blocking diaphragm. The mud blocking diaphragm is water permeable and mud impermeable, so that the diaphragm no longer needs to bear a large pressure, and the outer diameter size of the skirt pile sleeve is no longer limited.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] The present application is installed at the bottom of the skirt pile sleeve, and includes a water permeable filter diaphragm, a rigid framework, a sealing rubber flange connecting ring and a metal flange. The water permeable filter diaphragm is internally provided with the rigid framework, and the edges of the water permeable filter diaphragm and the rigid framework are wrapped with the sealing rubber flange connecting ring. The upper and lower sides of the sealing rubber flange connecting ring are provided with metal flanges, the upper metal flange is fixedly connected to the bottom of the skirt pile sleeve, and the lower metal flange is fixedly connected with the upper metal flange and clamps and fixes the edges of the water permeable filter diaphragm and the rigid framework and the sealing rubber flange connecting ring.

[0006] The inside of the bottom of the skirt pile sleeve is fixedly connected with a mud scraping member for scraping the mud on the steel pile, and the mud scraping member is located above the mud blocking diaphragm.

[0007] The mud scraping member is circular, and its outer diameter is fixedly connected to the inner wall of the bottom of the skirt pile sleeve, and its inner diameter is smaller than the inner diameter of the steel pile.

[0008] The mud scraping member is parallel to the mud blocking diaphragm.

[0009] The edges of the water permeable filter diaphragm and the rigid framework are provided with two diaphragm fixing clamps, and the two diaphragm fixing clamps are located inside the sealing rubber flange connecting ring.

[0010] The metal flanges on the upper and lower sides of the sealing rubber flange connecting ring are fixed by bolts and nuts, the bolts pass through the sealing rubber flange connecting ring, the water-permeable filter diaphragm and the rigid framework, and two diaphragm fixing clamps are respectively arranged on the inner and outer sides of the bolts and are arranged concentrically.

[0011] The rigid framework is a woven steel wire mesh or a perforated steel plate.

[0012] The edge of the water-permeable filter diaphragm and the sealing rubber flange connecting ring are bonded or vulcanized into an integral structure.

[0013] The advantages and positive effects of the present application are as follows:

[0014] 1. The present application can meet the use requirements of the sealing diaphragm and effectively filter out the mud at the bottom of the skirt sleeve, but due to the water permeability, the mud blocking diaphragm no longer needs to bear a large pressure, so that the processing technology of the mud blocking diaphragm is easier to realize, the outer diameter size of the skirt sleeve is no longer limited, and the mud blocking diaphragm product of a large size skirt sleeve diameter can be realized, and the product diameter can reach 8m.

[0015] 2. The present application sets a mud scraping part above the mud blocking diaphragm, which can scrape off the mud on the steel pile.

[0016] 3. The water-permeable filter diaphragm edge and the sealing rubber flange connecting ring of the present application are an integral structure, and cooperate with two diaphragm fixing clamps to avoid the water-permeable filter diaphragm edge from being separated from the sealing rubber flange connecting ring. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the present application applied to the skirt sleeve and the steel pile;

[0018] Figure 2 It is Figure 1 a local enlarged view of A in the middle;

[0019] Wherein: 1 is a skirt sleeve, 2 is a steel pile, 3 is a water-permeable filter diaphragm, 4 is a rigid framework, 5 is a sealing rubber flange connecting ring, 6 is a metal flange, 7 is a bolt, 8 is a nut, 9 is a diaphragm fixing clamp, and 10 is a mud scraping part. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below with reference to the drawings.

[0021] For example, Figure 1 and Figure 2As shown, the skirt pile sleeve 1 is provided with a water-permeable filter membrane 3, a rigid framework 4, a sealing rubber flange connecting ring 5 and a metal flange 6. The water-permeable filter membrane 3 is internally provided with the rigid framework 4. The edges of the water-permeable filter membrane 3 and the rigid framework 4 are wrapped with the sealing rubber flange connecting ring 5 for connection and sealing. The upper and lower sides of the sealing rubber flange connecting ring 5 are provided with the metal flange 6. The upper metal flange 6 is fixed to the bottom of the skirt pile sleeve 1. The lower metal flange 6 is fixed to the upper metal flange 6 and clamps and fixes the edges of the water-permeable filter membrane 3, the rigid framework 4 and the sealing rubber flange connecting ring 5.

[0022] The water-permeable filter membrane 3 of the embodiment can be a filter screen with a mesh number of 50-200. The rigid framework 4 is composed of impregnated cords. The impregnated cords are treated by a rubber coating process. The impregnated cords can be impregnated aramid cords or impregnated steel wire cords. Alternatively, the rigid framework 4 is a woven steel mesh or a perforated steel plate. The pore size of the steel mesh can be 5-50 mm. The pore size of the perforated steel plate can be 5-50 mm. The rigid framework 4 of the embodiment is a perforated steel plate. After the water-permeable filter membrane 3 is internally provided with the rigid framework 4, the water-permeable filter membrane 3 can permeate water but not mud slurry, which can effectively filter out the mud slurry at the bottom of the sleeve, ensure that the pressure generated during the lowering of the skirt pile sleeve 1 is met, and ensure that the steel pile 2 can be smoothly punctured without affecting the piling work after the jacket is positioned.

[0023] The edges of the water-permeable filter membrane 3 and the sealing rubber flange connecting ring 5 of the embodiment are bonded or vulcanized into an integral structure. During the lowering of the skirt pile sleeve 1, the mud blocking membrane will be pushed upward due to the intermediate stress. The integral structure design of the edges of the water-permeable filter membrane 3 and the sealing rubber flange connecting ring 5 can prevent the edges of the water-permeable filter membrane 3 from being detached from the sealing rubber flange connecting ring 5.

[0024] The embodiment is provided with two internal and external membrane fixing snap rings 9 at the edges of the water-permeable filter membrane 3 and the rigid framework 4. The two membrane fixing snap rings 9 are located inside the sealing rubber flange connecting ring 5 to ensure that the mud blocking membrane is tightly installed at the bottom of the skirt pile sleeve 1, which provides protection against the edges of the water-permeable filter membrane 3 being detached from the sealing rubber flange connecting ring 5. The metal flanges 6 on the upper and lower sides of the sealing rubber flange connecting ring 5 of the embodiment are fixed by bolts 7 and nuts 8. The bolts 7 pass through the sealing rubber flange connecting ring 5, the water-permeable filter membrane 3 and the rigid framework 4. The two membrane fixing snap rings 9 are located on the inner and outer sides of the bolts 7 and are concentrically arranged.

[0025] The mud scraping member 10 is fixed to the inner side of the bottom of the skirt pile sleeve 1 and is used to scrape the mud on the steel pile 2. The mud scraping member 10 is located above the mud blocking diaphragm. The mud scraping member 10 is annular, the outer diameter of the mud scraping member 10 is fixed to the inner wall of the bottom of the skirt pile sleeve 1, and the inner diameter of the mud scraping member 10 is smaller than the inner diameter of the steel pile 2. The mud scraping member 10 of the embodiment is parallel to the mud blocking diaphragm and is parallel to the radial direction of the skirt pile sleeve 1 and the steel pile 2. The mud scraping member 10 of the embodiment is detachably fixed to the inner wall of the bottom of the skirt pile sleeve 1. Two connecting members are fixed to the inner wall of the bottom of the skirt pile sleeve 1. The edge of the mud scraping member 10 is clamped between the two connecting members and is fixed by a fastening bolt.

[0026] The mud blocking diaphragm can effectively filter the mud at the bottom of the skirt pile sleeve 1 and meet the use requirements of the sealing diaphragm. Because of the water permeability, the mud blocking diaphragm no longer needs to bear a large pressure, so that the processing technology of the mud blocking diaphragm is easier to realize, the outer diameter size of the skirt pile sleeve 1 is no longer limited, and the mud blocking diaphragm product with a large size skirt pile sleeve 1 diameter can be realized. The product diameter can reach 8 m.

Claims

1. A mud blocking membrane installed at the bottom of a skirted pile sleeve, characterized by: The mud blocking diaphragm comprises a water-permeable filter diaphragm (3), a rigid framework (4), a sealing rubber flange connecting ring (5) and a metal flange (6), wherein the water-permeable filter diaphragm (3) is internally provided with the rigid framework (4), the edges of the water-permeable filter diaphragm (3) and the rigid framework (4) are wrapped with the sealing rubber flange connecting ring (5); the upper and lower sides of the sealing rubber flange connecting ring (5) are provided with the metal flange (6), the metal flange (6) located at the upper side is fixedly connected to the bottom of the skirt pile sleeve (1), the metal flange (6) located at the lower side is fixedly connected with the metal flange (6) located at the upper side, and the edges of the water-permeable filter diaphragm (3) and the rigid framework (4) and the sealing rubber flange connecting ring (5) are clamped and fixed; the water-permeable filter diaphragm (3) is a filter screen, the rigid framework (4) is composed of impregnated cord, or the rigid framework (4) is a woven steel wire mesh, or the rigid framework (4) is a perforated steel plate; the water-permeable filter diaphragm (3) can permeate water after being internally provided with the rigid framework (4), but cannot permeate mud.

2. The mud blocking membrane of claim 1, wherein: The bottom inner side of the skirt pile sleeve (1) is fixedly connected with a mud scraping member (10) for scraping mud on the steel pile (2), and the mud scraping member (10) is located above the mud blocking diaphragm.

3. The mud blocking membrane of claim 2, wherein: The mud scraping member (10) is in the shape of a circular ring, the outer diameter thereof is fixedly connected to the inner wall of the bottom of the skirt pile sleeve (1), and the inner diameter thereof is smaller than the inner diameter of the steel pile (2).

4. The mud blocking membrane of claim 3, wherein: The mud scraping member (10) is parallel to the mud blocking diaphragm.

5. The mud blocking membrane of claim 1, wherein: The edges of the water-permeable filter diaphragm (3) and the rigid framework (4) are provided with two diaphragm fixing snap rings (9) inside and outside, and the two diaphragm fixing snap rings (9) are located inside the sealing rubber flange connecting ring (5).

6. The mud blocking membrane of claim 5, wherein: The metal flanges (6) on the upper and lower sides of the sealing rubber flange connecting ring (5) are fixedly connected through bolts (7) and nuts (8), the bolts (7) pass through the sealing rubber flange connecting ring (5), the water-permeable filter diaphragm (3) and the rigid framework (4), the two diaphragm fixing snap rings (9) are respectively located on the inner and outer sides of the bolts (7) and are concentrically arranged.

7. The mud blocking membrane of claim 1, wherein: The rigid framework (4) is a woven steel wire mesh or a perforated steel plate.

8. The mud blocking membrane of claim 1, wherein: The edges of the water-permeable filter diaphragm (3) and the sealing rubber flange connecting ring (5) are bonded or vulcanized into an integral structure.

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