Method for installing ultra-large bridging hose of ocean platform

Abstract

The invention discloses a mounting method for an ultra-large bridging hose of an ocean platform, and belongs to the technical field of ocean platform operation. The mounting method comprises the following steps that a trestle is moved to the position between a first ocean platform and a second ocean platform through a workboat, one end of a bridging hose is fixedly connected with a first hard pipe through a flange, and the other end of the bridging hose is detachably connected with a support on the trestle through a blind flange; the drooping part of the bridging hose is detachably fixed on the trestle; the crane of the second ocean platform is used for driving the bridging hose to move in the X direction, the Y direction and the Z direction, so that coarse alignment of the bridging hose and the second hard pipe is achieved; fine alignment of the bridging hose and the flange of the second hard pipe is achieved by adjusting a chain block of a crane, and finally the bridging hose and the second hard pipe are fixed through bolts to complete installation. According to the method, the bridging hose between the platforms can be accurately and quickly mounted, the offshore outboard high-altitude workload is greatly reduced, the construction time is short, and the offshore construction safety is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of offshore platform operations, and in particular to an installation method for an extra-large jumper hose of an offshore platform. Background Art

[0002] my country has a long coastline and vast sea areas, rich marine oil resources, and an increasing number of mining projects, and the number of offshore oil platforms is also increasing. Among them, the jumper pipeline between offshore platforms is an important pipeline in offshore drilling operations: the jumper pipeline is mainly responsible for transmitting fresh water, seawater, compressed air, drilling mud and other fluid materials required for drilling operations from the support platform to the wellhead platform in the support platform auxiliary drilling operation mode; the jumper pipeline is mainly responsible for transmitting conventional supplies such as cementing cement, fuel oil, and fresh water from the support ship to the drilling platform or transporting oil from the drilling platform to the support ship in the conventional offshore drilling operation mode.

[0003] Since the platform works under dynamic ocean conditions, it is easily affected by various sea conditions such as waves and storms, which causes the offshore platform itself to have a certain elastic displacement. Elastic displacement is an important physical phenomenon. It not only affects the structural stability of the platform, but also causes the jumper line to be subjected to external stress during the connection process. The impact of this external stress on the pipeline cannot be underestimated. If a hard pipe is used for connection, it may cause damage, fatigue or even breakage of the pipeline, which will seriously affect the delivery of the fluid. To solve this problem, the offshore engineering field usually chooses a jumper hose as a connection method between two offshore platforms. Compared with a hard pipe, the jumper hose has better flexibility and adaptability, and can alleviate the stress concentration caused by the relative movement between platforms to a certain extent. The flexibility of this design allows the hose to adapt to the elastic displacement of the offshore platform under the influence of waves and wind, reducing the risk of connection failure. However, although the design of the jumper hose is flexible, there are still many construction challenges. First, the bending of the hose during the connection process makes it very easy to twist, resulting in inaccurate connection position. When the offshore platform undergoes relative displacement due to waves or other dynamic factors, the torsion of the jumper hose often becomes more complicated. In terms of the length of the hose, the larger the diameter, the longer the hose. This makes the installation of long-span hoses significantly more difficult. Therefore, the installation of hoses is usually carried out at sea rather than onshore, which brings additional challenges to the installation process.

[0004] In the traditional offshore lifting operation method, the installation of the jumper hose is usually achieved by a dedicated workboat lifting equipment to achieve the installation of the jumper hose between two offshore platforms. Although this method is feasible to a certain extent, due to the elastic displacement of the offshore platform itself, this method faces many difficulties: not only is it highly dependent on the marine environment, but also under the influence of external forces such as strong winds and waves, the installation process is often difficult to ensure accuracy and safety, especially in the process of installation alignment, it is often difficult to quickly and accurately achieve the required connection. Especially in severe marine weather conditions, the fluctuating sea surface and strong winds will make the installation more complicated and difficult. In addition, due to the large external force on the jumper hose during the installation process, this not only increases the technical difficulty of the installation, but also may cause the hose to be damaged during the installation process. This makes the overall installation process more difficult, and usually requires high costs and a long period of time, which may reach 10 to 15 days in many cases. Such a long installation period will undoubtedly affect the progress of the entire marine project, increase operating costs, and may have a chain reaction on other subsequent operation arrangements. More importantly, construction workers face higher risks when working at high altitudes, and long-term and large-scale offshore outboard high-altitude operations greatly increase the safety hazards of construction workers. High-altitude work itself is a high-risk job, especially in dynamic marine environments and severe weather conditions. Construction workers face a huge risk of falling or falling into the water. Accidents of falling or falling into the water occur from time to time, seriously threatening the lives of construction workers. Since human safety cannot be fully guaranteed, this not only affects the work enthusiasm of construction workers, but may also lead to serious safety accidents. Therefore, it is urgent to explore a more efficient and safe installation solution to reduce construction costs, shorten construction periods, and ensure the safety of construction workers. In summary, in the installation process of jumper hoses between offshore platforms, there are many challenges that need to be solved, such as elastic displacement, construction difficulty, high cost, and safety hazards. Therefore, it is very necessary to develop a new construction solution in order to significantly improve the installation quality, construction efficiency and safety of jumper lines, so as to ensure the smooth progress of marine engineering projects. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method for installing super-large jumper hoses on offshore platforms, which can accurately and quickly install jumper hoses between platforms, greatly reducing the workload at high altitudes outside the ship at sea, shortening the construction time, and effectively improving the safety of offshore construction.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A method for installing an ultra-large jumper hose on an offshore platform comprises the following steps:

[0008] S1. Move the pier to between the first offshore platform and the second offshore platform by using a workboat, and fix one end of the jumper hose to the first hard pipe on the first offshore platform through a flange. A flange is installed on the other end of the jumper hose, and the flange is fixedly connected to a blind flange. A bracket is provided on the pier of the workboat, and the blind flange is connected to the bracket through a connector. The drooping part of the jumper hose is detachably fixed to the pier.

[0009] S2. A crane is provided on the second offshore platform. A lifting belt is used to detachably connect the fall chain and the hook head on the crane to the jumper hose. The blind flange is removed and the connection between the jumper hose and the pier is released. The jumper hose is driven by the crane to move in the X, Y, and Z directions so that the jumper hose is roughly aligned with the flange of the second hard pipe on the second offshore platform.

[0010] S3. The jumper hose is precisely aligned with the flange of the second rigid pipe by adjusting the fall chain on the crane, the flange of the jumper hose port is fixedly connected with the flange of the second rigid pipe, and the installation is completed by releasing the connection between the jumper hose and the crane.

[0011] As a preferred embodiment of the present invention, when the jumper hose is connected to the first hard pipe, twisting and deformation of the jumper hose should be avoided.

[0012] As a preferred embodiment of the present invention, both the blind flange and the bracket are provided with hanging points; further preferably, there are multiple hanging points on the bracket.

[0013] As a preferred embodiment of the present invention, the connecting piece in step S1 is an iron chain.

[0014] As a preferred embodiment of the present invention, the hanging part of the jumper hose in step S1 is tied and fixed on the trestle by ropes.

[0015] As a preferred embodiment of the present invention, in step S3, the flange of the jumper hose port is fixedly connected to the flange of the second hard pipe by bolts.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention utilizes the trestle on the work boat and the crane on the offshore platform in combination with certain installation steps to quickly and accurately realize the installation of the super-large jumper hose between the two offshore platforms. The installation process is not affected by external forces. Compared with the traditional offshore lifting operation ship lifting process, the workload of high-altitude offshore overboard is greatly reduced. The construction personnel can complete the high-altitude offshore overboard operation within 10 minutes. The construction time is short, the cost of offshore operation ships is well saved, the safety of offshore construction is effectively improved, and the possibility of accidental high-altitude falls or water falls of construction personnel is greatly reduced. The installation method of the present invention can also be used for the removal and temporary fixation of subsequent jumper hose maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of step S1 in the method for installing an ultra-large jumper hose on an offshore platform according to the present invention;

[0019] Figure 2 This is a structural schematic diagram of step S2 in the method for installing an ultra-large jumper hose on an offshore platform according to the present invention;

[0020] Figure 3 This is a structural schematic diagram of step S3 in the method for installing an ultra-large jumper hose on an offshore platform according to the present invention;

[0021] Explanation of the accompanying drawings: 1. pier; 2. bracket; 3. first rigid pipe; 4. jumper hose; 5. crane; 6. fall chain; 7. second rigid pipe; 8. first offshore platform; 9. second offshore platform. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] The installation method of the super-large jumper hose of the offshore platform provided by the present invention comprises the following steps:

[0024] S1, such as Figure 1 As shown, the pier 1 is moved between the first offshore platform 8 and the second offshore platform 9 by the working ship, one end of the jumper hose 4 is fixedly connected to the first hard pipe 3 on the first offshore platform 8 through a flange, and a flange is installed on the other end of the jumper hose 4, and the flange is fixedly connected to a blind flange with a hanging point; a permanent bracket 2 is welded on the pier 1 of the working ship, and a plurality of hanging points are arranged on the bracket 2; the hanging point of the blind flange is connected to the hanging point of the bracket 2 by using connecting parts such as iron chains; the drooping part of the jumper hose 4 is detachably fixed to the pier 1 by means of rope binding or the like; during the above installation process, care should be taken to prevent the jumper hose 4 from twisting and deforming;

[0025] S2, such as Figure 2 As shown, a crane 5 is provided on the second offshore platform 9, and a lifting belt is used to detachably connect the fall chain 6 and the hook head on the crane 5 to the jumper hose 4, remove the blind flange and release the connection between the jumper hose 4 and the pier 1, and the crane 5 drives the flange side of the jumper hose 4 to perform movement control in the X, Y, and Z directions, so that the flange of the jumper hose 4 is roughly aligned with the flange of the second hard pipe 7 on the second offshore platform 9;

[0026] S3, such as Figure 3As shown, the flange of the jumper hose 4 is precisely aligned with the flange of the second rigid pipe 7 by adjusting the fall chain 6 on the crane 5, the flange at the end of the jumper hose 4 is fixedly connected with the flange of the second rigid pipe 7 by bolts, and the connection between the jumper hose 4 and the crane 5 is released to complete the installation.

[0027] It can be seen from the above installation process that the innovative installation method provided by the present invention mainly utilizes the combination of the pier on the work ship and the crane on the offshore platform, and through a series of precise installation steps, realizes the rapid and accurate installation of the super-large cross-connect hose between the two offshore platforms. The core of this method is to effectively overcome the various challenges faced by traditional offshore lifting operations in terms of external force influence, construction safety and work efficiency. The installation method of the present invention provides a stable working platform by utilizing the pier on the work ship, so that construction personnel can work in a relatively safe environment; at the same time, the design of the pier enables construction personnel to move conveniently between the work ship and the offshore platform, avoiding the complex operations required for direct lifting operations at high altitudes; combined with the crane on the offshore platform, construction personnel can dock and fix the hose on the pier, greatly reducing the workload of high-altitude operations. During the installation process, the method of the present invention ensures that it is not affected by external forces. Traditional installation methods often take several days or even weeks, while the installation method of the present invention, through reasonable installation steps and equipment coordination, construction personnel can complete the installation of the hose in just 10 minutes. This efficient operation method not only shortens the construction time, is more efficient, saves a lot of resources and time, but also significantly reduces the cost of ships for offshore operations. Since the construction personnel work on the pier, the risk of high-altitude operations is reduced, the possibility of accidental high-altitude falls or falling into the water is reduced, and the safety of offshore construction is greatly improved. Safety is one of the most important factors in marine construction. The present invention ensures the life safety of construction personnel and improves the safety of the overall operation through an innovative installation method. It should be emphasized that the installation method of the present invention is not only suitable for the first installation of the jumper hose, but can also be widely used in subsequent maintenance work: during the use of the jumper hose, the construction personnel can easily remove and temporarily fix the jumper hose through the method of the present invention, ensuring that the maintenance and overhaul and other related work can be completed quickly and effectively during the maintenance process. This flexibility makes the installation method of the present invention have a wider application prospect in the field of marine engineering.

[0028] It can be seen that the installation method of the present invention has significant advantages and can quickly and accurately install the super-large jumper hose between two offshore platforms. Compared with traditional offshore lifting operations, this method performs well in the following aspects:

[0029] 1. Quick installation: The optimized installation steps enable construction workers to complete the installation of the hose in just 10 minutes. This efficient operation method significantly shortens the construction period of offshore high-altitude operations.

[0030] 2. Reduce the workload at high altitude: The installation method of the present invention greatly reduces the workload at high altitude outside the ship at sea, reduces the frequency and intensity of construction workers working at height, thereby reducing the risks brought by high-altitude operations, effectively reducing the possibility of construction workers accidentally falling from height or falling into the water, and improving the safety of offshore construction.

[0031] 3. The construction is not affected by external forces: The installation method of the present invention can effectively avoid the interference of external forces such as wind and waves on the operation during the installation process, thereby ensuring the stability and accuracy of the installation.

[0032] 4. Cost savings: Since the construction time is greatly shortened, the cost of offshore operating vessels is significantly reduced, which not only reduces the overall cost of the project, but also improves the efficiency of resource utilization.

[0033] In summary, the innovative installation method of the present invention successfully realizes the rapid and accurate installation of the super-large cross-connect hose between two offshore platforms, which not only improves the construction efficiency and reduces the construction cost, but also significantly improves the construction safety and reduces the risk of construction workers falling into the sea. It performs well in improving construction efficiency, reducing operation risks and saving costs, and has broad application prospects and important practical value. With the continuous development and improvement of marine engineering technology, the installation method of the present invention will play a greater role in the fluid transportation between offshore platforms in future marine engineering projects.

[0034] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for installing an ultra-large jumper hose on an offshore platform, characterized in that: The following steps are involved: S1. Move the pier to between the first offshore platform and the second offshore platform by using a workboat, and fix one end of the jumper hose to the first hard pipe on the first offshore platform through a flange. A flange is installed on the other end of the jumper hose, and the flange is fixedly connected to a blind flange. A bracket is provided on the pier of the workboat, and the blind flange is connected to the bracket through a connector. The drooping part of the jumper hose is detachably fixed to the pier. S2. A crane is provided on the second offshore platform. A lifting belt is used to detachably connect the fall chain and the hook head on the crane to the jumper hose. The blind flange is removed and the connection between the jumper hose and the pier is released. The jumper hose is driven by the crane to move in the X, Y, and Z directions so that the jumper hose is roughly aligned with the flange of the second hard pipe on the second offshore platform. S3. The jumper hose is precisely aligned with the flange of the second rigid pipe by adjusting the fall chain on the crane, the flange of the jumper hose port is fixedly connected with the flange of the second rigid pipe, and the installation is completed by releasing the connection between the jumper hose and the crane.

2. The method for installing an ultra-large jumper hose on an offshore platform according to claim 1, characterized in that: The blind flange and the bracket are both provided with hanging points.

3. The installation method of the super large jumper hose for an offshore platform according to claim 1 is characterized by: The connecting piece in step S1 is an iron chain.

4. The method for installing an ultra-large jumper hose on an offshore platform according to claim 1, characterized in that: In step S1, the drooping portion of the jumper hose is tied and fixed on the trestle by ropes.

5. The method for installing an ultra-large jumper hose on an offshore platform according to claim 1, characterized in that: In step S3, the flange of the jumper hose port is fixedly connected to the flange of the second hard pipe by bolts.

Images