Positioning and mounting method for ship drilling and production system

Abstract

The invention relates to the technical field of ship construction, and discloses a positioning and mounting method of a ship drilling and production system, which comprises the following steps: before a ship is undocked, drawing a well center of a ship body main deck by taking a ship body base line, a ship body center line and a ship body rib position line as references; then the drill floor is positioned and mounted through the well center of the main deck of the ship body; then, a derrick base is installed with the ship body base line, the ship body center line and the well center of the drill floor as the benchmark, and installation of equipment planned to be installed in a dock in a drilling and production system is completed; after the ship is undocked, the BOP main crane and the BOP auxiliary crane are installed with the center line of the ship body, the well center of the drill floor and the top face of the derrick base as the benchmark, and remaining equipment in the drilling and production system is installed; after the ship is undocked, the top face of the derrick base serves as the positioning reference for installation of the drilling and production system equipment in the offshore floating state, the requirement for installation precision can be met, a special horizontal reference platform does not need to be additionally constructed, and the construction workload is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ship construction, and in particular to a positioning and installation method for a ship drilling system. Background Art

[0002] The main equipment of a certain type of ship's drilling and production system includes derrick, rotary table, pipe laying machine, watertight pipe tensioner and guide wheel, iron roughneck, BOP main crane, BOP auxiliary crane and BOP crane, etc. According to the needs of drilling and production operations, their installation uses the well center as the positioning reference. The wellhead lowering equipment also needs to be docked with the BOP. The BOP forklift track positioning also uses the well center as the positioning reference. The installation dimension chain of each equipment in the ship's drilling and production system is highly correlated and spans a large space. At the same time, due to the large number of equipment installed in the drilling platform area, the arrival time is also difficult to control. The docking cycle of a certain type of ship and other ships built at the same time in the dock cannot be consistent, and the equipment in the drilling and production system of a certain type of ship cannot be fully installed. The installation of all equipment in the drilling and production system is completed in the dock, resulting in the need for high-precision installation requirements for BOP main cranes and BOP auxiliary cranes and other equipment in the drilling and production system to be installed in the floating state at sea after a certain type of ship is undocking. Since the hull baseline is underwater when floating at sea, and the hull is affected by external forces such as waves, the hull level will be damaged to a certain extent. Therefore, the positioning reference for the installation of drilling and production system equipment in the dock can no longer be used as the positioning reference for the installation of drilling and production system equipment in the floating state at sea. The traditional process method requires setting a horizontal reference platform at the center line of the hull baseline strong structure with high hull structural strength and small deformation as the installation positioning reference for high-precision drilling and production equipment, which increases the workload of construction. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a positioning and installation method for a ship drilling and production system with simple construction and high installation accuracy.

[0004] In order to solve the above technical problems, the present invention provides a positioning and installation method for a ship drilling system, comprising the following steps:

[0005] Step 1: Before the ship leaves the dock, the centerline of the main deck of the hull is marked on the main deck of the hull based on the hull baseline, hull centerline and hull rib position line;

[0006] Step 2: Install the drilling platform support feet and the drilling platform on the hull. During installation, ensure that the well center of the drilling platform is in a vertical line with the well center of the main deck of the hull;

[0007] Step 3: Install the derrick base based on the hull baseline, hull centerline and well center of the drilling platform;

[0008] Step 4: After the ship is out of dock, the BOP main crane and BOP auxiliary crane are installed based on the centerline of the hull, the well center of the drilling platform and the top surface of the derrick base.

[0009] As a preferred embodiment of the present invention, four derrick bases are provided and arranged in a rectangular shape. In step three, the center lines of the four derrick bases are first aligned with the center line of the hull, and then the centers of the four derrick bases are aligned with the well center of the drilling platform. Finally, the installation position of the derrick base is determined according to the height difference between the installation surface of the derrick base and the horizontal plane where the hull baseline is located.

[0010] As a preferred solution of the present invention, in step three, after the derrick base is installed, the top surface of the derrick base is machined to ensure that its levelness meets the standard.

[0011] As a preferred embodiment of the present invention, in step one, a baseline well center is drawn on the horizontal plane where the hull baseline is located, and the position of the baseline well center corresponds to the well center position of the hull main deck; in step two, the well center of the drilling platform, the well center of the hull main deck and the baseline well center are on a vertical line.

[0012] As a preferred embodiment of the present invention, in step five, the installation heights of the BOP main crane and the BOP auxiliary crane are determined according to the height differences between the installation planes of the BOP main crane and the BOP auxiliary crane and the top surface of the horizontal platform respectively.

[0013] As a preferred embodiment of the present invention, step three also includes installing equipment planned to be installed in the dock in the drilling and production system, and step four also includes installing the remaining equipment in the drilling and production system based on the hull baseline, hull centerline and well center of the drilling platform.

[0014] As a preferred solution of the present invention, in step 4, it also includes installing the remaining equipment in the drilling system based on the center line of the hull, the well center of the drilling platform and the top surface of the derrick base.

[0015] As a preferred solution of the present invention, before the ship leaves the dock, the hull is arranged on a plurality of piers, and the top surfaces of the piers are adapted to the model lines of the hull.

[0016] As a preferred embodiment of the present invention, in step three, after the installation of the derrick base is completed, a plurality of strain gauges for detecting the deformation of the derrick base are arranged on the derrick base; in step four, after the ship is out of the dock, the top surface of the derrick base is corrected to be horizontal according to the deformation detected by the strain gauges.

[0017] As a preferred solution of the present invention, when the derrick base is installed, a correction margin is provided on the top surface of the derrick base.

[0018] The embodiment of the present invention provides a method for positioning and installing a drilling and production system of a ship. Compared with the prior art, the method has the following beneficial effects: the method can meet the requirements of installation accuracy by analyzing the derrick base as the positioning reference for installing the drilling and production system equipment in a floating state at sea after the ship is undocked; there is no need to additionally establish a dedicated horizontal reference platform for the ship floating at sea in the strong structure area of ​​the baseline, thereby reducing the workload of construction; the spatial position of the installation positioning reference of the drilling and production system equipment before the ship is undocked is closely related to the spatial position of the installation positioning reference of the drilling and production system equipment after the ship is undocked, thereby making it easier to realize the spatial dimension logical relationship of the installation of the entire set of drilling and production system equipment; the top surface of the derrick base is used as the reference plane, and the distance between it and the drilling and production system installation equipment such as the BOP crane and the BOP auxiliary crane is small, and there is no structure and equipment shielding between the top surface of the derrick base and the installation equipment, thereby facilitating the determination of the installation positioning of the drilling and production system such as the BOP crane and the BOP auxiliary crane in a floating state at sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the top view of the main deck of the hull of the present invention;

[0020] Figure 2 It is a schematic diagram of the top view of the drilling platform of the present invention;

[0021] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of the drilling platform before the ship is undocking according to the present invention;

[0022] Figure 4 It is a schematic diagram of the longitudinal cross-section structure of the drilling platform after the ship of the present invention is undocking;

[0023] In the figure, 1, hull baseline; 2, hull centerline; 3, hull rib line; 4, hull main deck; 41, well center of hull main deck; 5, drilling platform support foot; 6, drilling platform; 61, well center of drilling platform; 7, derrick base; 71, top surface of derrick base. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be understood that the present invention adopts the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] like Figure 1-4 As shown, a positioning and installation method of a ship drilling system according to a preferred embodiment of the present invention comprises the following steps:

[0027] Step 1: Before the ship leaves the dock, the well center 41 of the hull main deck (the well center of the hull main deck moon pool) is marked on the hull main deck 4 based on the hull baseline 1, the hull center line 2 and the hull rib position line 3;

[0028] Step 2: Install the drilling platform support foot 5 and the drilling platform 6 on the hull. Specifically, the drilling platform support foot 5 is arranged on the main deck 4 of the hull, and the drilling platform 6 is arranged on the drilling platform support foot 5. During installation, ensure that the well center 61 of the drilling platform is in a vertical line with the well center 41 of the main deck of the hull;

[0029] Step 3: Using the hull baseline 1, the hull centerline 2 and the well center 61 of the drilling platform as references, the derrick base 7 is installed. At this time, the equipment planned to be installed in the dock of the drilling and production system is also installed using the hull baseline 1, the hull centerline 2 and the well center 61 of the drilling platform as references;

[0030] Step 4: After the ship is undocked, the BOP main crane and the BOP auxiliary crane are installed with the center line 2 of the hull, the well center 61 of the drilling platform and the top surface 71 of the derrick base as the reference. At this time, the remaining equipment in the drilling and production system is also installed with the center line 2 of the hull, the well center 61 of the drilling platform and the top surface 71 of the derrick base as the reference. By analyzing the working principle of the drilling and production system and the structural characteristics of the hull (including the drilling platform support structure and the drilling platform structure), the plane with the smallest horizontal change after the ship is undocked is determined as the positioning reference for the installation of the drilling and production system equipment in the floating state at sea. This method finally determines that the top surface 71 of the derrick base is used as the positioning reference for the installation of the drilling and production system equipment in the floating state at sea after the ship is undocked. In other embodiments, if no additional equipment is installed in step 3, in step 4, the center line 2 of the hull, the well center 61 of the drilling platform and the top surface 71 of the derrick base are also used as the reference to install the remaining equipment in the drilling and production system.

[0031] Before the ship is undocked, the well center 41 of the main deck of the hull is marked out based on the hull baseline 1, the hull center line 2 and the hull rib position line 3; then, by ensuring that the well center 41 of the main deck of the hull and the well center 61 of the drilling platform are on the same vertical line, the positioning and installation of the drilling platform 6 is realized; then, based on the hull baseline 1, the hull center line 2 and the well center 61 of the drilling platform, the derrick base 7 is installed, and the installation of the equipment planned to be installed in the dock in the drilling and production system is completed; then, after the ship is undocked, the BOP main crane and the BOP auxiliary crane are installed based on the hull center line 2, the well center 61 of the drilling platform and the top surface 71 of the derrick base, and the remaining equipment in the drilling and production system is installed; by analyzing the working principle of the drilling and production system and the structural characteristics of the hull, the present invention determines that after the ship is undocked, the horizontal change of the top surface 71 of the derrick base is small, which can be used as the positioning reference for the installation of the drilling and production system equipment in the floating state at sea, and can meet the installation accuracy requirements.

[0032] Compared with the traditional technical methods, the advantages of the present invention are obvious, mainly as follows: the spatial position of the installation positioning reference of the drilling and production system equipment before the ship leaves the dock is closely related to the installation positioning reference of the drilling and production system equipment after the ship leaves the dock, which makes it easier to realize the spatial dimension logical relationship of the installation of the whole set of drilling and production system equipment; there is no need to establish a special horizontal reference platform for the ship floating at sea in the strong structure area of ​​the baseline, which reduces the construction workload; the top surface 71 of the derrick base is used as the reference plane, and the distance between it and the drilling and production system installation equipment such as the BOP crane and the BOP auxiliary crane is small, and there is no structure and equipment shielding between the top surface 71 of the derrick base and the installation equipment, which facilitates the determination of the installation positioning of the drilling and production system such as the BOP crane and the BOP auxiliary crane in the floating state at sea.

[0033] Exemplarily, four derrick bases 7 are provided and arranged in a rectangular shape. In step three, the center lines of the four derrick bases 7 are first aligned with the center line 2 of the hull (i.e., the four derrick bases 7 are arranged in a rectangular shape, and the longitudinal center line of the rectangle), and then the centers of the four derrick bases 7 are aligned with the well center 61 of the drilling platform. Finally, the installation position of the derrick base 7 is determined based on the height difference between the installation surface of the derrick base 7 and the horizontal plane where the hull baseline 1 is located, and the installation accuracy is high.

[0034] Exemplarily, in step three, after the derrick base 7 is installed, the top surface 71 of the derrick base is machined to ensure that its levelness meets the standard, thereby ensuring the installation accuracy of subsequent equipment.

[0035] Exemplarily, in step one, a baseline well center is marked on the horizontal plane where the hull baseline 1 is located, and the position of the baseline well center corresponds to the position of the well center 41 of the hull main deck; in step two, during the installation of the drilling platform support legs 5 and the drilling platform 6, ensure that the well center 61 of the drilling platform, the well center 41 of the hull main deck and the baseline well center are on a vertical line, and the three points are on the same straight line, ensuring that the installation accuracy of the drilling platform 6 is high.

[0036] For example, in step 5, the installation heights of the BOP main crane and the BOP auxiliary crane are determined according to the height differences between the installation plane of the BOP main crane and the installation plane of the BOP auxiliary crane and the top surface 71 of the derrick base, such as Figure 4 As shown, the BOP main crane in this embodiment is provided with two machine seats, and the heights between the installation planes of the two machine seats and the top surface 71 of the derrick base are H1 and H2 respectively. Then, the installation positions of the two machine seats of the BOP main crane are determined based on the hull centerline 2 and the well center 61 of the drilling platform, thereby realizing the positioning installation of the BOP main crane. Similarly, the height difference between the installation plane of the BOP auxiliary crane and the top surface 71 of the derrick base is H3.

[0037] For example, before the ship leaves the dock, the hull is placed on a plurality of piers, the top surface of which is adapted to the hull's profile, which can prevent the hull from shifting and ensure the installation accuracy of the drilling and production system.

[0038] Exemplarily, in step three, after the installation of the derrick base 7 is completed, a plurality of strain gauges for detecting the deformation of the derrick base 7 are arranged on the derrick base 7. Generally, a plurality of strain gauges are arranged, and the plurality of strain gauges are arranged at different positions of the derrick base 7, such as the connection between the derrick base 7 and the drilling platform 6; in step four, after the ship is undocking, the top surface 71 of the derrick base is corrected to be horizontal according to the deformation detected by the strain gauge, and then the BOP main crane and the BOP auxiliary crane are installed; the deformation detected is used to determine whether the derrick base 7 after the ship is undocking has been deformed, such as If the deformation amount detected is within the set range, it means that the derrick base 7 has basically not been deformed when the ship is out of dock, so there is no need to correct the top surface 71 of the derrick base; if the deformation amount detected exceeds the set range, it is necessary to make corresponding corrections to the top surface 71 of the derrick base according to the deformation amount to ensure that the top surface 71 of the derrick base is in a horizontal state to ensure the installation accuracy when it is used as the installation reference. Generally, when the derrick base 7 is installed, the top surface 71 of the derrick base is provided with a correction margin. The setting of the correction margin ensures that after the derrick base 7 is corrected, it can still meet the use requirements.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for positioning and installing a ship drilling system, characterized in that: The following steps are involved: Step 1: Before the ship leaves the dock, the centerline of the main deck of the hull is marked on the main deck of the hull based on the hull baseline, hull centerline and hull rib position line; Step 2: Install the drilling platform support feet and the drilling platform on the hull. During installation, ensure that the well center of the drilling platform is in a vertical line with the well center of the main deck of the hull; Step 3: Install the derrick base based on the hull baseline, hull centerline and well center of the drilling platform; Step 4: After the ship is out of dock, the BOP main crane and BOP auxiliary crane are installed based on the centerline of the hull, the well center of the drilling platform and the top surface of the derrick base.

2. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step three, after the derrick base is installed, the top surface of the derrick base is machined to ensure that its levelness meets the standard.

3. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: The derrick bases are provided with four and arranged in a rectangular shape. In step three, the center lines of the four derrick bases are first aligned with the center line of the hull, and then the centers of the four derrick bases are aligned with the well center of the drilling platform. Finally, the installation position of the derrick base is determined according to the height difference between the installation surface of the derrick base and the horizontal plane where the hull baseline is located.

4. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step 1, a baseline well center is marked on a horizontal plane where the hull baseline is located, and the position of the baseline well center corresponds to the well center position of the hull main deck; In step 2, the well center of the drilling platform, the well center of the main deck of the hull and the baseline well center are on a vertical line.

5. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step five, the installation heights of the BOP main crane and the BOP auxiliary crane are determined according to the height differences between the installation plane of the BOP main crane and the installation plane of the BOP auxiliary crane and the top surface of the derrick base.

6. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step three, it also includes installing the equipment planned to be installed in the dock in the drilling system. In step four, it also includes installing the remaining equipment in the drilling system based on the hull baseline, hull centerline and well center of the drilling platform.

7. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step 4, the remaining equipment in the drilling system is installed based on the centerline of the hull, the well center of the drilling platform and the top surface of the derrick base.

8. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: Before the ship leaves the dock, the hull is arranged on a plurality of buttresses, and the top surfaces of the buttresses are adapted to the model lines of the hull.

9. The method for positioning and installing a ship drilling system according to claim 1, characterized in that: In step three, after the installation of the derrick base is completed, a plurality of strain gauges for detecting the deformation of the derrick base are arranged on the derrick base; in step four, after the ship is out of the dock, the top surface of the derrick base is corrected to be horizontal according to the deformation detected by the strain gauges.

10. The method for positioning and installing a ship drilling system according to claim 9, characterized in that: When the derrick base is installed, a correction margin is provided on the top surface of the derrick base.

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