Offshore installation method for jacket ocean platform upper module

Abstract

The invention discloses a jacket ocean platform upper module offshore installation method, which belongs to the technical field of offshore petroleum, and comprises the following steps: installing a transport frame on a self-propelled modular transport vehicle; the self-propelled modular transport vehicle and the transport frame jointly run into the lower part of the upper module on a construction site; the self-propelled modular transport vehicle and the upper module move along with the barge and move to a jacket sea area which is installed on the sea; mooring and continuously adjusting the load of the barge; the self-propelled modular transport vehicle lifts the upper module and transports the upper module to the jacket; and butting the upper block upright column leg with the top of the jacket guide pipe leg. According to the method, the self-propelled modular transport vehicle and the barge are used for installing the jacket ocean platform upper module on the sea, the solution thought except the floating crane hoisting method and the floating method installation method is provided, and the problems that floating crane resources are in shortage, the hoisting module cost is high, and the structural design cannot meet the floating method installation requirement are solved.

Description

Technical Field

[0001] The invention belongs to the field of offshore petroleum technology, and in particular relates to an offshore installation method for a topside assembly of a jacket offshore platform. Background Art

[0002] Conventional jacket offshore platforms consist of jackets and upper modules. The construction and installation of jacket offshore platforms usually start with the construction of the jacket, followed by the construction of the upper modules, followed by the installation of the jacket at sea, and finally the upper modules are installed on the jacket using floating cranes or floating methods. Generally, upper modules with lighter weight (less than 6,000 tons) are installed using floating cranes, while heavier modules are generally installed using barges using floating methods. The former is more affected by floating crane resources.

[0003] Therefore, it is urgent to design a method for offshore installation of the upper assembly of a jacket offshore platform to solve the above-mentioned problems. Summary of the invention

[0004] The object of the present invention is to provide a method for offshore installation of a topside module of a jacket offshore platform, which has the advantages of simple installation and less resource usage, and solves the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the method for installing the upper module of a jacket offshore platform of the present invention is as follows: A method for installing a topside module of a jacket offshore platform at sea comprises the following steps: S1. Install the jacket offshore; S2, installing the transport frame onto the self-propelled modular transport vehicle; S3, the self-propelled modular transport vehicle and the transport frame are driven together under the upper module on the construction site; S4, pre-lifting to connect the upper assembly block and the transport frame; S5. transporting the upper assembly to the barge by means of a self-propelled modular transporter and a transport frame; S6. The self-propelled modular transporter and the upper assembly follow the barge and move to the sea area where the jacket is installed offshore; S7. Mooring the barge; S8, adjust the load of the barge; S9, the self-propelled modular transport vehicle lifts the upper assembly and transports the upper assembly to the conductor rack; S10. The self-propelled modular transport vehicle lowers its height, connects the upper module column legs with the top of the conductor leg of the conductor rack, and completes the installation of the upper module.

[0006] Further, in S1, a temporary channel is installed during the construction phase of the jacket, and then the jacket and the temporary channel are installed offshore.

[0007] Further, in S4, after the upper assembly block and the transport frame are connected, check and confirm that there is no abnormality in the secure connection between the upper assembly block and the transport frame.

[0008] Furthermore, in S5, a loading trestle is installed between the barge and the construction site, so that the self-propelled modular transport vehicle transports the upper assembly block from the construction site to the barge via the loading trestle.

[0009] Furthermore, in S6, before the barge moves to the jacket sea area, the loading trestle between the barge and the construction site is removed.

[0010] Furthermore, in S8, the barge is loaded so that the deck surface of the barge is flush with the upper surface of the temporary channel installed on the conductor frame.

[0011] Further, in S9, when the self-propelled modular transporter transports the upper assembly block to the jacket, the self-propelled modular transporter transports the upper assembly block to the jacket through a temporary passage on the jacket.

[0012] Furthermore, a loading trestle is installed between the barge and the conductor frame, so that the self-propelled modular transport vehicle transports the upper module from the barge to the conductor frame through the loading trestle.

[0013] Further, in S10, after the installation of the upper assembly is completed, the self-propelled modular transporter is withdrawn from the jacket channel to the barge.

[0014] Furthermore, the method further includes S11, removing the temporary passage on the catheter rack.

[0015] The present invention has the following advantages: the present invention adopts the above technical scheme, utilizes a self-propelled modular transport vehicle, and implements the installation of the upper module of the jacket offshore platform with a barge at sea, providing a solution other than the two methods of floating crane installation and floating installation, and solving the problems of limited floating crane resources, high cost of lifting modules, and structural design that cannot meet the requirements of floating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the upper assembly of the present invention being completed; Figure 2 This is a schematic diagram of the upper assembly of the present invention being completed and the self-propelled modular transport vehicle preparing to enter under the upper assembly for loading and transporting; Figure 3 It is a schematic diagram of the self-propelled modular transport vehicle of the present invention entering under the upper module and loading and transporting the module; Figure 4This is a schematic diagram of the intermediate process of loading and transporting the upper assembly of the present invention; Figure 5 This is a schematic diagram of the upper assembly of the present invention completing the loading operation onto a barge; Figure 6 It is a schematic diagram of installing the upper assembly block of the present invention onto the conductor frame; Figure 7 This is a schematic diagram of the completion of offshore installation of the upper assembly of the present invention; Figure 8 A schematic diagram of the self-propelled modular transport vehicle of the present invention being returned from a jacket to a barge; Fig. 9 A schematic diagram of the self-propelled modular transport vehicle of the present invention being completely withdrawn from the jacket to the barge; Fig.10 It is a schematic diagram of the final state of the upper assembly block and the jacket of the present invention.

[0017] Explanation of the markings in the figure: 1. Construction site; 2. Upper assembly; 3. Barge; 31. Loading trestle; 4. Self-propelled modular transporter; 41. Transport frame; 5. Conductor frame; 51. Temporary passage. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0020] Please refer to the attached Figure 1 To Attachment Fig.10 The present invention describes a method for offshore installation of a topside module of a jacket offshore platform.

[0021] At present, when constructing and installing jacket-type offshore platforms, the jacket is usually constructed first, followed by the construction of the upper modules, followed by the installation of the jacket at sea, and finally the upper modules are installed on the jacket using floating cranes or floating methods. Generally, the upper modules with lighter weight (less than 6,000 tons) are installed using floating cranes, while the heavier modules are generally installed using barges using floating methods. The former is greatly affected by floating crane resources.

[0022] This installation method includes the following steps: S1, installing the jacket 5 offshore; Specifically, a temporary passage 51 is installed on the jacket 5, and then the jacket 5 and the temporary passage 51 are installed at sea. By setting up the temporary passage 51, the weight of the self-propelled modular transport vehicle 4 and the upper module 2 is supported when the upper module 2 is installed at sea.

[0023] According to the design scheme of the conductor frame 5 and the temporary passage 51, the conductor frame 5 and the temporary passage 51 are constructed.

[0024] S2, installing the transport frame 41 onto the self-propelled modular transport vehicle 4; S3, the self-propelled modular transport vehicle 4 and the transport frame 41 drive together under the upper assembly block 2 on the construction site 1; Specifically, the self-propelled modular transport vehicle 4 is prepared according to the loading plan of the upper assembly block 2 and the transport frame 41 is installed on the self-propelled modular transport vehicle 4 .

[0025] S4, pre-lifting to connect the upper assembly block 2 and the transport frame 41; Specifically, after the upper assembly block 2 and the transport frame 41 are connected, check and confirm that the upper assembly block and the transport frame 41 are securely connected without abnormality.

[0026] S5, transporting the upper assembly 2 to the barge 3 by means of the self-propelled modular transport vehicle 4 and the transport frame 41; Specifically, a loading trestle 31 is installed between the barge 3 and the construction site 1 , so that the self-propelled modular transport vehicle 4 transports the upper assembly block 2 from the construction site 1 to the barge 3 via the loading trestle 31 .

[0027] S6, the self-propelled modular transporter 4 and the upper assembly 2 follow the barge 3 and move to the sea area where the jacket 5 is installed at sea; Specifically, before the barge 3 moves to the sea area of ​​the jacket 5, the loading pier 31 between the barge 3 and the construction site 1 is removed.

[0028] S7, mooring the barge 3; Specifically, the mooring point may be selected at the position of the conductor frame 5, anchoring or mooring monopile, etc.

[0029] S8, adjusting the load of barge 3; Specifically, the barge 3 is loaded so that the deck surface of the barge 3 is flush with the upper surface of the temporary passage 51 installed on the jacket 5, and the height difference between the deck surface of the barge 3 and the temporary passage 51 is controlled within ±100 mm.

[0030] S9, the self-propelled modular transport vehicle 4 lifts the upper assembly block 2 to transport the upper assembly block 2 to the conductor frame 5; Specifically, when the self-propelled modular transport vehicle 4 transports the upper assembly block 2 to the jacket 5 , the self-propelled modular transport vehicle 4 transports the upper assembly block 2 to the jacket 5 through the temporary passage 51 on the jacket 5 .

[0031] Specifically, a loading trestle 31 is installed between the barge 3 and the jacket 5 , so that the self-propelled modular transport vehicle 4 transports the upper assembly block 2 from the barge 3 to the jacket 5 via the loading trestle 31 .

[0032] S10, the self-propelled modular transport vehicle 4 lowers its height, connects the column legs of the upper assembly block 2 with the top of the conduit legs of the conduit rack 5, and completes the installation of the upper assembly block 2.

[0033] Specifically, after the installation of the upper assembly block 2 is completed, the self-propelled modular transport vehicle 4 is withdrawn from the passage of the jacket 5 to the barge 3 .

[0034] S11, removing the temporary passage 51 on the catheter frame 5; Specifically, when the temporary passage 51 on the jacket 5 is removed, the loading pier 31 between the barge 3 and the jacket 5 is also removed.

[0035] The present invention adopts the above technical solution, utilizes the self-propelled modular transport vehicle 4, and implements the installation of the upper module 2 of the jacket frame 5 marine platform at sea along with the barge 3, providing another solution in addition to the two methods of floating crane installation and floating installation, and solves the problems of limited floating crane resources, high cost of lifting modules, and structural design that cannot meet the requirements of floating installation.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for installing the upper module of a jacket offshore platform at sea, characterized in that: The following steps are involved: S1. Install the jacket offshore; S2, installing the transport frame onto the self-propelled modular transport vehicle; S3, the self-propelled modular transport vehicle and the transport frame are driven together under the upper module on the construction site; S4, pre-lifting to connect the upper assembly block and the transport frame; S5. transporting the upper assembly to the barge by means of a self-propelled modular transporter and a transport frame; S6. The self-propelled modular transporter and the upper assembly follow the barge and move to the sea area where the jacket is installed offshore; S7. Mooring the barge; S8, adjust the load of the barge; S9, the self-propelled modular transport vehicle lifts the upper assembly and transports the upper assembly to the conductor rack; S10. The self-propelled modular transport vehicle lowers its height, connects the upper module column legs with the top of the conductor leg of the conductor rack, and completes the installation of the upper module.

2. The method for installing the upper module of a jacket offshore platform at sea according to claim 1, characterized in that: In S1, a temporary access channel is installed on the jacket, and then both the jacket and the temporary access channel are installed offshore.

3. The method for installing the upper assembly of a jacket offshore platform according to claim 1, characterized in that: In S4, after the upper assembly block and the transport frame are connected, check and confirm that there is no abnormality in the secure connection between the upper assembly block and the transport frame.

4. The method for installing the upper assembly of a jacket offshore platform according to claim 1, characterized in that: In S5, a loading trestle is installed between the barge and the construction site, so that the self-propelled modular transporter transports the upper module from the construction site to the barge via the loading trestle.

5. The method for offshore installation of the upper assembly of a jacket offshore platform according to claim 4, characterized in that: In S6, before the barge is moved to the jacket sea area, the loading trestle between the barge and the construction site is removed.

6. The method for installing the upper assembly of a jacket offshore platform according to claim 2, characterized in that: In S8, the barge is loaded so that the barge deck surface is flush with the upper surface of the temporary channel installed on the jacket.

7. The method for installing the upper assembly of a jacket offshore platform according to claim 6, characterized in that: In S9, when the self-propelled modular transporter transports the upper assembly to the jacket, the self-propelled modular transporter is transported to the jacket through a temporary passage on the jacket.

8. The method for installing the upper assembly of a jacket offshore platform according to claim 1, characterized in that: A loading trestle is installed between the barge and the conductor frame, so that the self-propelled modular transport vehicle can transport the upper module from the barge to the conductor frame through the loading trestle.

9. The method for installing the upper assembly of a jacket offshore platform according to claim 1, characterized in that: In S10, after the installation of the topside module is completed, the self-propelled modular transporter is withdrawn from the jacket channel to the barge.

10. The method for offshore installation of the topside module of a jacket offshore platform according to claim 7, characterized in that: It also includes S11, removing the temporary passage on the conductor rack.

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