CN215715170U

CN215715170U - Pile leg inertia removal device for offshore platform and offshore platform

Info

Publication number: CN215715170U
Application number: CN202121480584.9U
Authority: CN
Inventors: 柏健; 崔希君; 史永晋; 邬可谊; 任红伟; 崔青; 魏羲; 李森
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-01
Anticipated expiration: 2031-06-30

Abstract

The utility model provides a pile leg inertia reducing device for an offshore platform and the offshore platform. The pile leg inertia removing device comprises a connecting cross brace, a connecting upright post and a vibration damping component, wherein the connecting cross brace is fixedly connected between adjacent pile legs, the connecting upright post is fixedly connected between the connecting cross brace and a platform main body of an offshore platform, the connecting cross brace and the connecting upright post respectively comprise a plurality of split blocks which are in telescopic connection, and the vibration damping component is arranged between the split blocks or between partial split blocks. The offshore platform comprises a platform main body, four pile legs arranged at four corners of the platform main body, four pile fixing chambers arranged at connecting positions of the platform main body and the pile legs, and the pile leg inertia removing devices, wherein the four groups of the inertia removing devices are respectively arranged between the adjacent pile legs and are positioned above the pile fixing chambers. The utility model has the advantages of reducing pile leg swing and pile fixing chamber stress concentration, ensuring the safety of the offshore platform and the like.

Description

Pile leg inertia removal device for offshore platform and offshore platform

Technical Field

The utility model relates to the field of ocean engineering, in particular to a pile leg inertia reducing device for an offshore platform and the offshore platform.

Background

In the process of offshore platform operation, the pile legs are important components of the offshore platform and are used for supporting the weight of the upper ship body and bearing environmental loads such as wind, waves, currents and the like. When the sea stormy waves are large, no matter the offshore platform is in towing or standing working conditions, large inertial force can be generated, and the inertial force of the pile legs is the largest in all parts of the offshore platform. Specifically, under the towing working condition, the inertial force of the pile legs can enable the offshore platform to roll or pitch, and the local stress at the connection part of the pile fixing chamber and the pile legs is increased, so that the safety problem of cracking or breaking easily occurs in the use process of the pile fixing chamber, and the stability of the whole structure is low; meanwhile, when the pile is in a standing working condition, the inertia force of the pile leg can also increase the pressure of part of the pile leg to the ground, the bearing of the foundation is unfavorable, the related structure is easily damaged, and the safety is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a pile leg inertia reducing device for an offshore platform and the offshore platform, wherein the pile leg inertia reducing device is used for reducing the pile leg swing and the stress concentration of a pile fixing chamber and ensuring the safety of the offshore platform.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a spud leg inertia subtracts except that device for offshore platform, is including connecting stull, connecting stand and damping part, wherein, connect stull fixed connection between adjacent spud leg, connect stand fixed connection connect in connect the stull with between the platform main part of offshore platform, connect the stull with the connecting stand all includes a plurality of division blocks of flexible connection, be equipped with between each division block or part between the division block damping part.

As a further improvement of the above technical solution:

the damping component comprises a damping spring and a reinforcing spring, the damping spring is arranged in the middle section area of the connecting cross brace and the connecting upright post, and the reinforcing spring is arranged between the split blocks close to the pile legs and the adjacent split blocks.

Adjacent split blocks are telescopically connected through threads.

And the two ends of the connecting cross brace are fixedly connected between the adjacent pile legs through a cross brace fixing piece.

The cross brace fixing piece is a fixing rope or a fixing buckle.

The connecting upright posts are fixedly arranged on the platform main body of the offshore platform through mounting bases, and base reinforcing ribs are arranged on the peripheries of the mounting bases.

The connecting upright column is arranged at the center of the connecting cross brace.

The connecting upright post is connected with the connecting cross brace through a bolt, one end of the bolt is pressed on the connecting cross brace, and the other end of the bolt is tightly connected with the connecting upright post.

The platform main body of the offshore platform is provided with a lift which is convenient for operators to install the inertia reducing device.

The offshore platform comprises a platform main body, four pile legs arranged at four corners of the platform main body, four pile fixing chambers arranged at connecting positions of the platform main body and the pile legs, and four groups of pile leg inertia removing devices for the offshore platform, wherein the four groups of the inertia removing devices are respectively arranged between the adjacent pile legs and are positioned above the pile fixing chambers.

Compared with the prior art, the utility model has the advantages that:

according to the utility model, the connecting cross braces are arranged between the adjacent pile legs, and the connecting upright posts are arranged between the connecting cross braces and the platform main body of the offshore platform, so that a temporary supporting structure is added to the pile legs in a severe weather environment, the swinging of each pile leg is limited, the inertia force of the pile leg is partially dispersed and acted on the platform main body, the strength of the pile leg lifting structure is effectively improved, the phenomena of pile leg swinging and pile fixing chamber local stress concentration are reduced or eliminated, and the foundation bearing capacity is improved.

Meanwhile, the connecting cross brace and the connecting upright post respectively comprise a plurality of split blocks which are connected in a telescopic mode, so that the inertia eliminating device can be adjusted in a self-adaptive mode according to the setting position of the pile leg, and the connecting cross brace and the connecting upright post are convenient to operate and high in universality. And vibration damping parts are arranged among all the split blocks or among partial split blocks, and the arrangement of the vibration damping parts further reduces the swing inertia force of the pile leg.

Therefore, the inertia reducing device can temporarily reinforce and reduce vibration of the offshore platform, greatly reduces the local stress of the swinging of the offshore platform and the position of a pile fixing chamber, and improves the safety and the service life of the offshore platform in severe weather; and the structure is simple, the cost is low, and the occupation of redundant space is not needed. The offshore platform of the present invention also has the above-described advantages of the inertia mitigation assembly.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 is a front view of a leg inertia mitigation device for an offshore platform of the present invention.

FIG. 2 is a schematic view showing the positional relationship between the vibration damping member of the present invention and the split block.

Fig. 3 is a schematic view of the position relationship of the connecting wale and the pile leg of the present invention.

Fig. 4 is a schematic structural diagram of the connecting position of the connecting cross brace and the connecting upright post.

FIG. 5 is a schematic illustration of an offshore platform of the present invention.

The reference numerals in the figures denote:

1. connecting the cross braces; 2. connecting the upright posts; 3. a vibration damping member; 31. a damping spring; 32. a reinforcing spring; 4. an offshore platform; 41. pile legs; 42. a platform body; 43. a pile fixing chamber; 5. splitting the blocks; 51. a thread; 6. a cross brace fixing piece; 7. installing a base; 8. a base reinforcing rib; 9. a bolt; 10. an elevator.

Detailed Description

The utility model will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the utility model.

Fig. 1 shows an embodiment of the present invention of a leg inertia mitigation device for offshore platforms, which may be used for both new and optimized retrofitting of existing offshore platforms. In this embodiment, the leg inertia reducing device for an offshore platform includes a connecting wale 1, a connecting column 2, and a damping member 3. The connecting cross braces 1 are fixedly connected between the adjacent pile legs 41, the connecting upright columns 2 are fixedly connected between the connecting cross braces 1 and the platform main body 42 of the offshore platform 4, the connecting cross braces 1 and the connecting upright columns 2 respectively comprise a plurality of split blocks 5, the adjacent split blocks 5 are telescopically connected, and the vibration damping parts 3 are arranged between the split blocks 5 or between partial split blocks 5.

According to the utility model, the connecting cross braces 1 are arranged between the adjacent pile legs 41, and the connecting upright posts 2 are arranged between the connecting cross braces 1 and the platform main body 42 of the offshore platform 4, so that a temporary supporting structure is added to the pile legs 41 in a severe weather environment, the swinging of each pile leg 41 is limited, the inertia force of the pile leg 41 is partially dispersed to the platform main body 42, the strength of the lifting structure of the pile leg 41 is effectively improved, the swinging of the pile leg 41 and the local stress concentration of the pile fixing chamber 43 are reduced or eliminated, and the bearing capacity of the foundation is improved.

Meanwhile, the connecting cross brace 1 and the connecting upright post 2 both comprise a plurality of split blocks 5 which are in telescopic connection, so that the inertia eliminating device can be adjusted in a self-adaptive mode according to the setting position of the pile leg 41, and the connecting cross brace is convenient to operate and high in universality. And the damping parts 3 are arranged between the split blocks 5 or between partial split blocks 5, and the arrangement of the damping parts 3 further reduces the swinging inertia force of the pile leg 41. Therefore, the inertia reducing device can temporarily reinforce and reduce the vibration of the offshore platform 4, greatly reduces the local stress of the swinging of the offshore platform 4 and the position of the pile fixing chamber 43, and improves the safety and the service life of the offshore platform 4 in severe weather; and the structure is simple, the cost is low, and the occupation of redundant space is not needed.

As shown in fig. 2 and 3, the damping member 3 includes a damping spring 31 and a reinforcing spring 32. Wherein, the damping spring 31 is arranged in the middle section area of the connecting cross brace 1 and the connecting upright post 2, and the reinforcing spring 32 is arranged between the split block 5 close to the pile leg 41 and the adjacent split block 5. The arrangement of the damping spring 31 and the reinforcing spring 32 further reduces the swinging inertia force of the pile leg 41, and ensures the safety of the offshore platform 4 in a severe environment.

Further, adjacent split blocks 5 are telescopically connected by means of screw threads 51. The length of the connecting cross brace 1 and the connecting upright post 2 is adjustable, so that the installation requirements of pile legs 41 of different offshore platforms 4 are met, and the offshore platform connecting device is simple in structure, high in universality and convenient to operate.

As shown in fig. 1 and 3, the two ends of the connecting wale 1 are fixedly connected between the adjacent legs 41 through a wale fixing member 6 to ensure the reduction effect of the leg inertia reduction device. In this embodiment, the wale fixing member 6 is a fixing rope, the fixing rope is wound around the periphery of the pile leg 41, and the installation and the disassembly are convenient, so that the inertia reducing device can be flexibly used in a severe environment without influencing the normal use of the offshore platform 4. In other embodiments, the cross brace fixing element 6 may also be a fixing buckle, and the fixing buckle is sleeved on the periphery of the pile leg 41.

In this embodiment, the split blocks 5 disposed near the spud legs 41 are arc split blocks, the arc split blocks are adapted to the spud legs 41, and one side of the cross brace fixing member 6 is located in an arc groove of the arc split blocks. To ensure a reliable fixing of the connecting wale 1.

As shown in fig. 1, the connecting upright 2 is disposed at the center of the connecting wale 1, and the connecting upright 2 is fixedly mounted on the platform main body 42 of the offshore platform 4 through the mounting base 7, which enables the connecting upright 2 to be reliably mounted. Meanwhile, the periphery of the mounting base 7 is provided with a base reinforcing rib 8 to ensure that the inertia reducing device has enough supporting strength.

As shown in fig. 4, the connecting upright 2 is connected with the connecting cross-brace 1 through a bolt 9, one end of the bolt 9 is pressed on the connecting cross-brace 1, and the other end is fastened with the connecting upright 2. It makes connecting upright 2 and connecting stull 1 reliably be connected to guarantee the effect that spud leg 41 sways and subtracts.

Further, the platform body 42 of the offshore platform 4 is provided with the lift 10 to facilitate installation of the inertia mitigation device by an operator.

In this embodiment, a specific operation method of the leg inertia reduction device for the offshore platform is as follows: 1) when the weather is severe and the wind and waves are large and the pile leg 41 is not lifted any more, an inertia reducing device is installed, and the connecting cross brace 1 and the pile leg 41 are fixed at a preset height by adopting a lifter 10; 2) the connecting cross brace 1 and the connecting upright post 2 are fixedly connected according to the fixed height of the connecting cross brace 1, and the connecting upright post 2 is arranged on the mounting base 7 of the platform main body 42, so that the effect of reducing the inertia force of the pile leg 41 can be achieved; 3) when the legs 41 need to be lifted or the weather is no longer bad, the inertia mitigation device can be removed and stored for the next use.

As shown in fig. 1 and 5, the offshore platform of the present embodiment includes a platform body 42, four legs 41, a pile fixing chamber 43, and four sets of leg inertia reducing devices for offshore platforms as described in the above embodiments. Wherein, four spud legs 41 are arranged at four corners of the platform main body 42; the four pile fixing chambers 43 are respectively arranged at the connecting positions of the platform main body 42 and the pile legs 41; four sets of inertia mitigation means are provided between adjacent legs 41 and above the stake pocket 43. The offshore platform 4 of the utility model also has the above-mentioned advantages of the leg inertia mitigation device.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The pile leg inertia reduction device for the offshore platform is characterized by comprising connecting cross braces, connecting upright columns and damping components, wherein the connecting cross braces are fixedly connected between adjacent pile legs, the connecting upright columns are fixedly connected between the connecting cross braces and a platform main body of the offshore platform, the connecting cross braces and the connecting upright columns respectively comprise a plurality of split blocks which are in telescopic connection, and the damping components are arranged between the split blocks or between partial split blocks.

2. The leg inertia mitigation device of claim 1, wherein the damping member comprises a damping spring disposed in a midsection region of the connecting strut and the connecting upright and a reinforcing spring disposed between the split block proximate the leg and an adjacent split block.

3. The leg inertia mitigation device of claim 1, wherein adjacent split blocks are telescopically connected by threads.

4. The leg inertia mitigation device of any one of claims 1 to 3, wherein the connecting cross-brace is fixedly connected between adjacent legs by a cross-brace fixing member at both ends of the connecting cross-brace.

5. The leg inertia mitigation device of claim 4, wherein the brace securing member is a securing rope or a securing buckle.

6. The leg inertia mitigation device for offshore platforms of any of claims 1 to 3, wherein the connecting columns are fixedly mounted to the platform body of the offshore platform by means of mounting bases, the outer circumference of which is provided with base stiffeners.

7. The leg inertia mitigation device for offshore platforms of any of claims 1 to 3, wherein the connection upright is provided at the center of the connection cross brace.

8. The leg inertia mitigation device of claim 7, wherein the connection post is connected to the connection cross-brace by a bolt, one end of the bolt is pressed onto the connection cross-brace, and the other end of the bolt is fastened to the connection post.

9. The leg inertia mitigation device of any one of claims 1 to 3, wherein the platform body of the offshore platform is provided with a lift to facilitate installation of the inertia mitigation device by an operator.

10. An offshore platform, comprising a platform main body, four pile legs arranged at four corners of the platform main body, and four pile fixing chambers arranged at connecting positions of the platform main body and the pile legs, and is characterized by further comprising four groups of pile leg inertia reducing devices as claimed in any one of claims 1 to 9, wherein the four groups of the inertia reducing devices are respectively arranged between the adjacent pile legs and are positioned above the pile fixing chambers.