阅读说明：本技术 一种立管保护架的安装方法 (Installation method of vertical pipe protection frame ) 是由 刘建峰 王彦多 孙道青 杜颖 赵刚 沈健 黄海龙 张琛 张健 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种立管保护架的安装方法,包括以下4个步骤：S1建立拖拽系统、保护系统及倒链系统；S2在将合适的气囊绑定在所述立管保护架上,并将各个系统伸出的绳索固定在立管保护架上；S3由拖拽系统拖拽立管保护架到指定位置处,并由倒链系统将立管保护架安装在立管外围；S4固定立管,拆卸各个绳索。本发明中在立管保护架安装的过程中,不使用浮吊资源,不需要运输立管保护架的拖轮靠近立管作业,就可以方便、快捷地完成立管保护架的安装作业,节省项目成本,降低作业风险,提高施工效率。(The invention discloses an installation method of a stand pipe protection frame, which comprises the following 4 steps: s1, establishing a dragging system, a protection system and a chain rewinding system; s2, binding a proper air bag on the riser protection frame, and fixing ropes extending out of each system on the riser protection frame; s3, dragging the riser protection frame to a specified position by a dragging system, and installing the riser protection frame on the periphery of the riser by a chain block system; s4 fixing the vertical pipe and detaching each rope. In the process of installing the vertical pipe protection frame, floating crane resources are not used, the operation of transporting the tugboat of the vertical pipe protection frame to be close to the vertical pipe is not needed, the installation operation of the vertical pipe protection frame can be conveniently and quickly completed, the project cost is saved, the operation risk is reduced, and the construction efficiency is improved.)

1. A method for installing a riser protection bracket is characterized in that: the method is realized by the following steps:

s1: a dragging system for dragging the riser protection bracket to a preset position near a riser is arranged on a platform bottom deck, a protection system for preventing the riser protection bracket from colliding with the riser is arranged at a preset position on the sea surface, and a chain reversing system for sleeving the riser protection bracket on the periphery of the riser is arranged above the installation position of the riser protection bracket;

s2: an air bag is bound on the vertical pipe protection frame, and the vertical pipe protection frame is respectively connected with the dragging system and the protection system through ropes and is placed in seawater;

s3: the dragging system drags the riser protection frame to a specified position near the riser, the protection system prevents the riser protection frame from colliding with the riser in the dragging process, the riser protection frame is connected to a chain block system, the air bag is disassembled, and the riser protection frame is sleeved on the periphery of the riser by the chain block system;

s4: and fixing the stand pipe protection frame, and disconnecting the stand pipe protection frame from the dragging system and the protection system to finish the installation of the stand pipe protection frame.

2. The method of installing a riser guard of claim 1, wherein: in S1, the dragging system includes a winch, a gantry and a guide wheel, the winch and the gantry are fixed on the deck at the bottom of the platform, the guide wheel is disposed in the gantry, and a rope led out by the winch drags the riser protection bracket under the guidance of the guide wheel.

3. The method of installing a riser guard of claim 1, wherein: at S1, the protection system includes a tug fixed at a predetermined position, a first cable control device is disposed on the tug, and a cable led out by the first cable control device is connected to the riser protection bracket.

4. The method of installing a riser guard of claim 1, wherein: at S1, the chain block system includes a lifting lug mounted on the jacket beside the riser and a chain block fixed to the lifting lug.

5. The method of installing a riser guard of claim 4, wherein: lifting lugs are arranged on the jacket 3 meters above the riser protection frame, and the lifting lugs and the chain block bear at least 10 tons.

6. A method of installing a riser protection bracket according to claim 3, wherein: and finishing the binding work of the air bag and the vertical pipe protection frame on the tug, arranging a platform crane on the tug, and putting the vertical pipe protection frame bound with the air bag into seawater by using the platform crane.

7. The method of installing a riser guard of claim 1, wherein: the size of the air bag is determined by the weight and buoyancy of the riser protection frame, and the difference value obtained by subtracting the integral gravity of the air bag and the riser protection frame from the integral buoyancy of the air bag and the riser protection frame is not less than 10 kN.

Technical Field

The invention relates to the field of maintenance and reconstruction of ocean engineering platforms, in particular to a method for installing a riser protection frame.

Background

The marine riser is a pipeline connecting a seabed and a floating body on the sea surface, and is mainly used for conveying oil or natural gas and the like. The main categories include free standing risers, steel catenary risers, flexible risers, and the like.

The ocean platform riser is bearing inside higher operating pressure, and its environment that outside is located is also comparatively abominable, and it not only can receive the effect of environmental load such as wave, ocean current, sea ice, still can receive the destruction of boats and ships collision. Once a riser is damaged by collision, the crude oil or natural gas transported by the riser can leak, so that serious accidents such as damage of offshore platform production facilities and personnel injury can be caused, and huge losses can be brought to the environment and the economy. Therefore, it is significant to install the protection frame on the opposite pipe.

Riser fender mounting faces the following difficulties: 1. the vertical pipe protection frame has larger volume and heavier weight; 2. the shape of the vertical pipe protection frame is irregular, the gravity center is not easy to find, and the vertical pipe protection frame is difficult to hang, hang and place; 3. the field operation space is narrow, a plurality of obstacles such as a ship leaning piece, a vertical pipe, a cabled walkway, a conduit frame leg, an inclined strut and the like exist near the installation position of the vertical pipe protection frame, and the large-scale floating crane is difficult to perform short-distance operation; 4. the tug of the transportation stand pipe protection frame cannot be directly close to the stand pipe and the pipe frame leg to carry out construction operation, otherwise, the risk of collision between the tug and the stand pipe exists.

The conventional installation method of the riser protection bracket comprises the following steps: the vertical pipe protection frame is conveyed to the position near the platform by a tug, the vertical pipe protection frame is hoisted to the position near the position to be installed by using a floating crane, and after the vertical pipe protection frame is reversely buckled in the air, the vertical pipe protection frame is accurately positioned by using a chain block, and the subsequent installation work is completed.

The mounting method comprises the following steps: 1. the floating crane resources need to be input, so that the cost is high; 2. the process of reversing from floating crane hoisting to hoisting by chain block and hoist engine is needed, the risk is high, and the construction difficulty is high.

Disclosure of Invention

The invention provides an installation method of a riser protection bracket, which does not need a floating crane in the installation process of the riser protection bracket and reduces project expenditure.

In order to solve the technical problem, the invention provides a method for installing a riser protection bracket, which is realized by the following steps.

S1: the method comprises the steps that a dragging system used for dragging the riser protection frame to a preset position near a riser is arranged on a platform bottom deck, a protection system used for preventing the riser protection frame from colliding with the riser is arranged at a preset position on the sea surface, and a chain reversing system used for sleeving the riser protection frame on the periphery of the riser is arranged above the installation position of the riser protection frame.

S2: and binding an air bag on the stand pipe protection frame, connecting the stand pipe protection frame with the dragging system and the protection system respectively by using ropes, and putting the stand pipe protection frame into seawater.

S3: the dragging system drags the stand pipe protection frame to a specified position near the stand pipe, the protection system prevents the stand pipe protection frame from colliding with the stand pipe in the dragging process, then the stand pipe protection frame is connected to a chain block system, the air bag is disassembled, and the stand pipe protection frame is sleeved on the periphery of the stand pipe through the chain block system.

S4: and fixing the stand pipe protection frame, and disconnecting the stand pipe protection frame from the dragging system and the protection system to finish the installation of the stand pipe protection frame.

Further, in S1, the dragging system includes a winch, a gantry and a guide wheel, the winch and the gantry are fixed on the platform bottom deck, the guide wheel is disposed in the gantry, and a rope led out by the winch drags the riser protection bracket under the guidance of the guide wheel.

Further, in S1, the protection system includes a tug fixed at a predetermined position, a first rope control device is disposed on the tug, and a rope led out by the first rope control device is connected to the riser protection bracket.

Further, in S1, the chain block system includes a lifting lug mounted on the jacket beside the riser, and a chain block fixed to the lifting lug.

Further, a lifting lug is arranged on the jacket at a position 3 meters above the riser protection frame, and the lifting lug and the chain block bear at least 10 tons.

Further, the air bag and the vertical pipe protection frame are bound on the tug boat, a platform crane is arranged on the tug boat, and the vertical pipe protection frame bound with the air bag is placed in seawater by the platform crane.

Further, the size of the air bag is determined by the weight and buoyancy of the riser protection bracket, and the difference value obtained by subtracting the integral gravity of the air bag and the riser protection bracket from the integral buoyancy of the air bag and the riser protection bracket is not less than 10 kN.

The invention has the technical effects that: (1) the method is only used for installing the stand pipe protection frame on the ocean platform, the buoyancy of seawater on the stand pipe protection frame and an air bag is used as a supporting force, and the dragging effect of the dragging system on the floating stand pipe protection frame is added to replace the carrying function of a floating crane on the stand pipe protection frame during the installation of the original stand pipe protection frame, so that the installation operation of the stand pipe protection frame can be conveniently and quickly completed, the project cost is saved, the operation risk is reduced, and the construction efficiency is improved; (2) the method of buoyancy of the air bag is adopted, the stand pipe protection frame floats on the sea, a floating crane system is not needed in the moving process of the stand pipe protection frame, only the traction force of the stand pipe protection frame and the air bag moving on the sea is needed, and the cost and the resources are saved.

Drawings

FIG. 1 is a schematic illustration of the installation process of the riser protection stand of the present invention.

Reference numerals: 1-a winch; 2-gantry; 3-a guide wheel; 4-chain inversion; 5-a riser protection bracket; 6-air bag; 7-a tug; 8-a first rope control; 9-a second rope control; 10-a jacket; 11-a riser; 12 a platform bottom deck; 13-a platform crane; 14-lifting lug.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.