Laminated Self-Adjusting Packer

Abstract

The present invention belongs to the field of offshore jacket installation, specifically, a laminated self-adjusting packer, the baffle plate group is composed of two groups arranged up and down, a self-expanding device that expands when encountering water is provided between the two baffle plate groups, the baffle plate group includes at least three baffle plates sleeved on the sleeve, and the baffle plates are relatively slid and adjusted radially as the spacing between the outer wall of the sleeve and the inner surface of the steel pile changes during the falling process of the sleeve being sleeved into the steel pile; the uppermost baffle plate in the upper baffle plate group is fixed to the outer wall of the sleeve, and the lowermost baffle plate is the middle-layer baffle plate, the uppermost baffle plate in the lower baffle plate group is the middle-layer baffle plate, and the lowermost baffle plate is fixed to the outer wall of the sleeve, the two middle-layer baffle plates are connected, and the self-expanding device is sleeved on the outer side of the connection between the two middle-layer baffle plates; the lower part of the baffle plate group located at the bottom is linked with a component. The present invention can well deal with the situation of pile deviation, will not affect the falling of the sleeve, and ensure the plugging effect.

Description

Technical Field

[0001] The present invention belongs to the field of offshore jacket installation, and specifically relates to a laminated self-adjusting packer. Background Art

[0002] In recent years, the construction of offshore platforms in China has developed rapidly. Although it started late, it has reached the international advanced level and the technology is becoming increasingly mature. When constructing the fixed jacket wind turbine foundation of offshore piles, it is necessary to drive piles first, then place the jacket, and fix the steel pile and the sleeve-fixed jacket by grouting. The packer is a key component for pile driving, which is related to the success of pile driving, and slurry leakage often occurs. At present, the Trelleborg-style pre-pile packer is adopted in China. However, in order to reduce leakage, two layers of packers are designed, resulting in a decrease in the height of the cement slurry, relatively complex installation, and high cost. Summary of the Invention

[0003] Aiming at the above problems existing in the existing pre-column packer, the purpose of the present invention is to provide a laminated self-adjusting packer. This packer can greatly improve the problem of slurry leakage, facilitate installation, and reduce costs.

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

[0005] The present invention includes a packer plate group and a self-expanding device. The packer plate group is composed of two groups arranged up and down. A self-expanding device that expands automatically when encountering water is provided between the two packer plate groups. The packer plate group includes at least three packer plates stacked up and down. Each packer plate is sleeved on the sleeve. During the downward movement of the sleeve into the steel pile, the packer plates slide relative to each other radially along with the change in the distance between the outer wall of the sleeve and the inner surface of the steel pile; the uppermost packer plate in the upper packer plate group is fixedly connected to the outer wall of the sleeve, and the lowermost packer plate is the middle layer packer plate. The uppermost packer plate in the lower packer plate group is the middle layer packer plate, and the lowermost packer plate is fixedly connected to the outer wall of the sleeve. The middle layer packer plates in the two packer plate groups are connected to each other. The self-expanding device is sleeved on the outside of the connection of the two middle layer packer plates; a component is linked below the lower packer plate group, and the component plays a guiding role in the change of the distance between the sleeve and the steel pile when the sleeve and the steel pile are eccentric.

[0006] Wherein, a structure of the component includes a rotating block, a rotating rod, a telescopic rod and a slider. One end of the rotating block is fixedly connected to the middle-layer sealing partition board in the lower sealing partition board group. One end of the rotating rod is hinged to the other end of the rotating block, and the other end of the rotating rod is always in sliding contact with a stopper B fixedly connected to the outer wall of the sleeve. A telescopic rod is arranged between the rotating rod and the outer wall of the sleeve. A chute is formed along the length direction of the rotating rod. One end of the telescopic rod is hinged to the outer wall of the sleeve, and the other end of the telescopic rod is hinged with a slider. The slider is accommodated in the chute and can slide in the chute.

[0007] Another structure of the component includes a rotating block, a rotating rod, an elastic member and a stopper B. One end of the rotating block is fixedly connected to the middle-layer sealing partition board in the lower sealing partition board group. One end of the rotating rod is hinged to the other end of the rotating block, and the other end of the rotating rod is always in sliding contact with a stopper B fixedly connected to the outer wall of the sleeve. An elastic member is connected between the rotating rod and the outer wall of the sleeve.

[0008] One end of the rotating block is fixedly connected to the outer edge of the lower surface of the middle-layer sealing partition board in the lower sealing partition board group, and the rest of the sealing partition boards in the lower sealing partition board group are all inside the rotating block.

[0009] The self-expanding device includes an elastic expansion bag and an expansion material filled inside the expansion bag that self-expands when encountering water.

[0010] The middle-layer sealing partition boards in the two sealing partition board groups are connected by a connecting plate. The self-expanding device is sleeved outside the connecting plate. After the self-expanding device encounters water, it fills the space enclosed by the steel pile, the sleeve and the two middle-layer sealing partition boards outside the connecting plate.

[0011] Each of the sealing partition boards in the two sealing partition board groups is divided into multiple segments, and the adjacent segments are spliced in a dovetail manner, that is, one end of each segment is a dovetail-shaped convex block and the other end is a dovetail groove.

[0012] The upper surfaces of the segments of the uppermost sealing partition board in the upper sealing partition board group and the lower surfaces of the segments of the lowermost sealing partition board in the lower sealing partition board group are respectively fixedly connected to the outer wall of the sleeve through stoppers A.

[0013] A stopper C is provided at the outer edge of the upper surface of the middle-layer sealing partition board in the upper sealing partition board group, and the sealing partition board on the upper layer of the middle-layer sealing partition board is radially limited by the stopper C.

[0014] Each of the sealing partition boards in the upper sealing partition board group is circular, and the width of the middle-layer sealing partition board is greater than the width of the rest of the sealing partition boards; each of the sealing partition boards in the lower sealing partition board group is circular, and the width of the middle-layer sealing partition board is greater than the width of the rest of the sealing partition boards.

[0015] The surfaces of the sealing partition plates in the sealing partition plate group are sprayed with lubricating materials.

[0016] The advantages and positive effects of the present invention are as follows:

[0017] 1. The sealing partition plate of the present invention can be adjusted by components, which can well cope with the situation of offset piles, will not affect the falling of the sleeve, and ensure the sealing effect; when the sleeve has the situation of offset piles, the components play a guiding role for the sealing partition plate, enabling the laminated self-adjusting packer to adapt to the steel pile and avoiding the situation of jamming.

[0018] 2. The present invention greatly improves the situation of slurry leakage and reduces the cost.

[0019] 3. In the two sealing partition plate groups of the present invention, the sealing partition plate fixedly connected to the outer wall of the sleeve is fixedly connected by a stop block A, and the stop block A is welded on the outer wall of the sleeve, avoiding the situation of punching holes in the sleeve during the installation of the traditional pre-pile packer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the positive pile state of Embodiment 1 of the present invention;

[0021] Figure 2 is Figure 1 a partial enlarged view of one side of the packer in the axial section in

[0022] Figure 3 It is a schematic structural diagram of the offset pile state of Embodiment 1 of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the positive pile state of Embodiment 2 of the present invention;

[0024] Figure 5 is Figure 4 a partial enlarged view of one side of the packer in the axial section in

[0025] Figure 6 It is a schematic structural diagram of the offset pile state of Embodiment 2 of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the sealing partition plate of the present invention;

[0027] Among them: 1 is the sealing partition plate, 2 is the stop block A, 3 is the rotating block, 4 is the rotating rod, 5 is the rubber band, 6 is the fixing ring, 7 is the expansion bag, 8 is the expansion material, 9 is the stop block B, 10 is the stop block C, 11 is the steel pile, 12 is the sleeve, 13 is the intermediate layer sealing partition plate, 14 is the connecting plate, 15 is the slider, 16 is the connecting block, 17 is the telescopic rod, 18 is the chute. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described in detail below with reference to the drawings.

[0029] Embodiment 1

[0030] As Figures 1 to 3 shown, the present invention includes a sealing partition group and a self-expanding device. Among them, the sealing partition group is composed of two groups arranged up and down. A self-expanding device that expands upon contact with water is provided between the two groups of sealing partition groups. The sealing partition group includes at least three sealing partitions 1 stacked up and down. Each sealing partition 1 is sleeved on a sleeve 12. During the process of the sleeve 12 being inserted into the steel pile 11, the sealing partitions 1 slide relative to each other radially along with the change in the distance between the outer wall of the sleeve 12 and the inner surface of the steel pile 11; the uppermost sealing partition 1 in the upper sealing partition group is fixedly connected to the outer wall of the sleeve 12, and the lowermost sealing partition 1 is the middle-layer sealing partition 13. The uppermost sealing partition 1 in the lower sealing partition group is the middle-layer sealing partition 13, and the lowermost sealing partition 1 is fixedly connected to the outer wall of the sleeve 12. The middle-layer sealing partitions 13 in the two sealing partition groups are connected to each other. The self-expanding device is sleeved on the outside of the connection of the two middle-layer sealing partitions 13; a component is linked below the lower sealing partition group, and the component plays a guiding role in the change of the distance between the sleeve 12 and the steel pile 11 when the sleeve 12 and the steel pile 11 are eccentrically positioned.

[0031] Each sealing partition 1 in the upper sealing partition group is circular. The width of the middle-layer sealing partition 13 is greater than that of the other sealing partitions 1, that is, the width of the middle-layer sealing partition 13 is the largest. Each sealing partition 1 in the lower sealing partition group is circular. The width of the middle-layer sealing partition 13 is greater than that of the other sealing partitions 1, that is, the width of the middle-layer sealing partition 13 is the largest; the middle-layer sealing partitions 13 in the two sealing partition groups have the same size. The number of sealing partitions 1 in the two sealing partition groups can be the same or different. In this embodiment, there are four sealing partitions 1 in the upper sealing partition group, and the radii of the circular sealing partitions increase sequentially from top to bottom. There are five sealing partitions 1 in the lower sealing partition group, and the radii of the circular sealing partitions decrease sequentially from top to bottom.

[0032] As Figure 7 shown, each sealing partition 1 in the sealing partition group of this embodiment is divided into multiple segments, and the adjacent segments are spliced in a dovetail manner, that is, one end of each segment is a dovetail-shaped convex block and the other end is a dovetail groove; during installation, there is no need for welding, and it can be directly spliced to the outside of the sleeve 12, which is convenient for installation.

[0033] Each sealing partition 1 in the sealing partition group of this embodiment is a steel part (such as a stainless steel plate), and a lubricating material is sprayed on the surface of the steel part. The lubricating material in this embodiment can be silicone oil, silicone grease or paint film with a relatively small coefficient of friction. The paint for the paint film can be the plastic powder of Tianjin Aiyue Powder Coating Co., Ltd., with the model BJ2090. During the process of achieving eccentric positioning, the adjacent sealing partitions are more lubricated when sliding.

[0034] In this embodiment, components are provided between each section of the middle-layer baffle plate 13 in the baffle plate group located below and the outer wall of the sleeve 12, and the components include a rotating block 3, a rotating rod 4, a telescopic rod 6 and a slider 15. One end of the rotating block 3 is fixedly connected to the outer edge of the lower surface of the middle-layer baffle plate 13 in the baffle plate group located below, and the remaining baffle plates 1 in the baffle plate group located below are all on the inner side of the rotating block 3; one end of the rotating rod 4 is hinged to the other end of the rotating block 3, and the other end of the rotating rod 4 is always in sliding contact with a stopper B9 fixed to the outer wall of the sleeve 12. A telescopic rod 17 is provided between the rotating rod 4 and the outer wall of the sleeve 12, and a sliding groove 18 is opened on the rotating rod 4 along the length direction. One end of the telescopic rod 17 is hinged to a connecting block 16 fixed to the outer wall of the sleeve 12, and the other end of the telescopic rod 17 is hinged to a slider 15, which is accommodated in the sliding groove 18 and can slide in the sliding groove 18.

[0035] The middle layer baffle plates 13 in the two baffle plate groups of this embodiment are connected by a connecting plate 14, and the self-expansion device is sleeved on the outer side of the connecting plate 14; the connecting plate 14 is connected to the inner ring of the middle layer baffle plate 13. The self-expansion device of this embodiment includes an elastic expansion bag 7 and an expansion material 8 that is self-expanding when exposed to water and filled in the expansion bag 7. The expansion material 8 that is self-expanding when exposed to water can be an acrylate copolymer or a polyurethane prepolymer. The acrylate copolymer can be one or more of starch grafted acrylate, grafted acrylamide, highly substituted cross-linked carboxymethyl cellulose, cross-linked carboxymethyl cellulose grafted acrylamide or cross-linked hydroxyethyl cellulose grafted acrylamide polymer, and the polyurethane prepolymer can be a highly absorbent resin SAP. General water-expandable materials have a good expansion ratio in fresh water environment, but in seawater environment, their expansion ratio will be greatly limited. The water-expandable material of this embodiment can have a higher expansion ratio (10 to 50 times) under seawater conditions, and the expansion rate and expansion force can be controlled by adjusting its formula ratio. The expansion material 8 expands when it meets water, expanding the elastic expansion bag 7 and filling the space surrounded by the steel pile 11, the sleeve 12 and the two middle layer partition plates 13 outside the connecting plate 14.

[0036] In this embodiment, the upper surfaces of the uppermost isolation plate 1 in the isolation plate group located above and the lower surfaces of the lowermost isolation plate 1 in the isolation plate group located below are fixed to the outer wall of the sleeve 12 through the stopper A2. The stopper A2 is welded to the outer wall of the sleeve 12 to avoid the need to drill holes in the sleeve 12 when installing the traditional pile packer.

[0037] In this embodiment, the outer edge of the upper surface of each section of the middle-layer isolation plate 13 in the isolation plate group located at the top is provided with a stopper C10, and the isolation plate 1 of the upper layer of the middle-layer isolation plate 13 is radially limited by the stopper C10. The isolation plates 1 below the middle-layer isolation plate 13 in the isolation plate group located at the bottom are radially limited by the rotating block 3.

[0038] In this embodiment, the number of stoppers A2 in the two sets of sealing partition plates is the same and they correspond to each other one by one vertically; the number of rotating blocks 3, stoppers C10 and stoppers A2 in any one set of sealing partition plates is the same and they correspond to each other one by one.

[0039] Embodiment Two

[0040] As Figures 4 to 6 shown, the difference between this embodiment and Embodiment One is that: the components of this embodiment include a rotating block 3, a rotating rod 4, an elastic member and a stopper B9. One end of the rotating block 3 is fixedly connected to the outer edge of the lower surface of the middle-layer sealing partition plate 13 in the lower set of sealing partition plates, and the rest of the sealing partition plates 1 in the lower set of sealing partition plates are all inside the rotating block 3; one end of the rotating rod 4 is hinged to the other end of the rotating block 3, and the other end of the rotating rod 4 is always in sliding contact with the stopper B9 fixedly connected to the outer wall of the sleeve 12, and an elastic member is connected between the rotating rod 4 and the outer wall of the sleeve 12. The elastic member of this embodiment is located between the stopper B9 and the lower set of sealing partition plates, and the rotating rod 4 is always linked with the lower set of sealing partition plates through the elastic member; the elastic member is a rubber band 5, one end of the rubber band 5 is connected to the fixing ring 6 arranged on the outer wall of the sleeve 12, and the other end is connected to the fixing ring 6 arranged on the rotating rod 4.

[0041] The working principle of the present invention is as follows:

[0042] The laminated self-adjusting packer of the present invention is a pre-pile type packer. During the process of the sleeve 12 falling into the steel pile 11, if it is in the normal pile state (that is, the axial center lines of the sleeve 12 and the steel pile 11 are collinear), the laminated self-adjusting packer forms a double sealing structure by the self-expansion device and each annular sealing partition plate 1. The expansion material 8 will expand completely when encountering water, and the expansion bag 7 can expand perfectly to seal according to the size of the gap between the outer wall of the sleeve 12 and the inner wall of the steel pile 11.

[0043] When encountering a situation of a deviated pile as Figure 3 or Figure 6 shown (that is, the axial center lines of the sleeve 12 and the steel pile 11 are not collinear), each sealing partition plate 1 is annular and adjustable through components; during the falling process of the sleeve 12 being sleeved, except for the sealing partition plate fixedly connected to the outer wall of the sleeve 12 by the stopper A2, the rest of the sealing partition plates slide radially to adapt to the change in the distance between the outer wall of the sleeve 12 and the inner wall of the steel pile 11, and play a guiding role through the mutual cooperation of adjacent sealing partition plates 1 and components. Specifically:

[0044] When the sleeve 12 drops into the steel pile 11 and there is a deviation of the pile, a part of each sealing partition 1 slides and contracts, and the other part slides and expands; the expansion bags in the sliding and contracting part fill and seal the space surrounded by the two intermediate sealing partitions 13, the outer wall of the sleeve 12 and the inner wall of the steel pile 11, and the expansion bags in the sliding and expanding part expand outwards between the two intermediate sealing partitions 13 and abut against and seal the inner wall of the steel pile 11; the rotating rods 4 within the range where the distance between the sleeve 12 and the steel pile 11 becomes smaller (i.e., the rotating rods 4 in the sliding and contracting part) are rotated by being pushed by the stoppers B9, and the telescopic rods 17 connected to this part of the rotating rods 4 are in the extended state, and the rotating rods 4 within the range where the distance between the sleeve 12 and the steel pile 11 becomes larger (i.e., the rotating rods 4 in the sliding and expanding part) are rotated by being pulled by the telescopic rods 17 (the telescopic rods 17 connected to this part of the rotating rods 4 are in the contracted state) or the rubber bands 5, and the rotating rods 4 rotated by being pushed by the stoppers B9 are in contact with the stoppers B9. Since the rotating rods 4 are inclined, there is an inward component force on the rotating rods 4 that causes one end of the rotating rods 4 to rotate inwards, driving the sealing partitions 1 to slide inwards to conform to the inner wall of the steel pile 11.

[0045] The sealing partitions of the present invention adopt an annular guiding design, which can well handle the situation of pile deviation, will not affect the dropping of the sleeve 12, and ensure the plugging effect. When the sleeve 12 has a pile deviation, the rotating rods 4 play a guiding role on the sealing partitions, enabling the laminated self-adjusting packer to conform to the steel pile 11 and avoiding the situation of jamming.

Claims

1. A laminated self-adjusting packer, characterized in that: The invention comprises a baffle plate group and a self-expanding device, wherein the baffle plate group is composed of two groups arranged one above the other, and a self-expanding device that self-expands when exposed to water is arranged between the two groups of baffle plate groups. The baffle plate group comprises at least three baffle plates (1) stacked one above the other, each of the baffle plates (1) being sleeved on a sleeve (12), and the baffle plates (1) being relatively slidable in the radial direction as the distance between the outer wall of the sleeve (12) and the inner surface of the steel pile (11) changes during the falling process of the sleeve (12) being sleeved into the steel pile (11); the uppermost baffle plate (1) in the baffle plate group located at the top is fixedly connected to the outer wall of the sleeve (12); The bottommost baffle plate (1) is an intermediate baffle plate (13); the topmost baffle plate (1) in the baffle plate group located below is an intermediate baffle plate (13); the bottommost baffle plate (1) is fixedly connected to the outer wall of the sleeve (12); the intermediate baffle plates (13) in the two baffle plate groups are connected; the self-expansion device is sleeved on the outer side of the connection between the two intermediate baffle plates (13); a component is linked below the baffle plate group located below, and the component plays a guiding role in the change of the spacing between the sleeve (12) and the steel pile (11) when the sleeve (12) and the steel pile (11) are offset; The assembly comprises a rotating block (3), a rotating rod (4), a telescopic rod (17) and a slider (15); one end of the rotating block (3) is fixedly connected to the middle layer of the sealing plate group (13) located below; one end of the rotating rod (4) is hingedly connected to the other end of the rotating block (3); the other end of the rotating rod (4) is always in sliding contact with a stopper B (9) fixedly connected to the outer wall of the sleeve (12); a telescopic rod (17) is provided between the rotating rod (4) and the outer wall of the sleeve (12); a sliding groove (18) is provided on the rotating rod (4) along the length direction; one end of the telescopic rod (17) is hingedly connected to the outer wall of the sleeve (12); the other end of the telescopic rod (17) is hingedly connected to the slider (15); the slider (15) is accommodated in the sliding groove (18) and can slide in the sliding groove (18).

2. The laminated self-adjusting packer according to claim 1, characterized in that: One end of the rotating block (3) is fixedly connected to the outer edge of the lower surface of the middle layer of the isolation plate (13) in the isolation plate group located below, and the remaining isolation plates (1) in the isolation plate group located below are all on the inner side of the rotating block (3).

3. The laminated self-adjusting packer according to claim 2, characterized in that: The self-expansion device comprises an elastic expansion bag (7) and an expansion material (8) filled in the expansion bag (7) and self-expanding when in contact with water.

4. The laminated self-adjusting packer according to claim 3, characterized in that: The component structure is replaced with one comprising a rotating block (3), a rotating rod (4), an elastic member and a stopper B (9), one end of the rotating block (3) being fixedly connected to an intermediate layer of a sealing plate (13) in the sealing plate group located below, one end of the rotating rod (4) being hinged to the other end of the rotating block (3), the other end of the rotating rod (4) being always in sliding contact with a stopper B (9) fixed to the outer wall of the sleeve (12), and an elastic member being connected between the rotating rod (4) and the outer wall of the sleeve (12).

5. The laminated self-adjusting packer according to claim 1, characterized in that: The intermediate layer isolation plates (13) in the two groups of isolation plates are connected via a connecting plate (14), and the self-expanding device is sleeved on the outside of the connecting plate (14). When the self-expanding device comes into contact with water, it fills the space enclosed by the steel pile (11), the sleeve (12) and the two intermediate layer isolation plates (13) on the outside of the connecting plate (14).

6. The laminated self-adjusting packer according to claim 1, characterized in that: Each of the sealing plates (1) in the two sealing plate groups is divided into multiple sections, and adjacent sections are spliced ​​in a dovetail manner, that is, one end of each section is a dovetail-shaped protrusion and the other end is a dovetail groove.

7. The laminated self-adjusting packer according to claim 6, characterized in that: The upper surfaces of the sections of the uppermost isolation plate (1) in the isolation plate group located above and the lower surfaces of the sections of the lowermost isolation plate (1) in the isolation plate group located below are respectively fixed to the outer wall of the sleeve (12) through the stoppers A (2).

8. The laminated self-adjusting packer according to claim 1, characterized in that: A stopper C (10) is provided on the outer edge of the upper surface of the middle-layer isolation plate (13) in the isolation plate group located above, and the isolation plate (1) on the upper layer of the middle-layer isolation plate (13) is radially limited by the stopper C (10).

9. The laminated self-adjusting packer according to claim 1, characterized in that: Each of the isolation plates (1) in the isolation plate group located at the top is in the shape of a circular ring, and the width of the middle layer isolation plate (13) is greater than the width of the remaining isolation plates (1); Each of the isolation plates (1) in the isolation plate group located at the bottom is in the shape of a circular ring, and the width of the middle layer isolation plate (13) is greater than the width of the remaining isolation plates (1).

10. The laminated self-adjusting packer according to claim 1, characterized in that: The surface of each sealing plate (1) in the sealing plate group is sprayed with lubricating material.

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