A deep-sea pipeline motion simulation test system

Abstract

The present application relates to the technical fields of deep-sea oil exploitation and transportation, and particularly relates to a deep-sea pipeline motion simulation test system, which comprises a motion simulation support and a soil box, the motion simulation support comprises an upper motion frame, a lower motion frame and a plurality of support columns, a first driving assembly is arranged between the lower motion frame and the support columns, a second driving assembly is arranged between the upper motion frame and the support columns, a plurality of bearing rods are installed above the lower motion frame, a connecting frame is fixedly connected to the inner side of the upper motion frame, an offshore platform model is connected to the lower side of the connecting frame through a first vibration table, a pipeline model is arranged between the offshore platform model and the soil box, and sensors for measuring the motion state of the pipeline model are installed on the part of the pipeline model located in the box. The present application has a simple structure, can comprehensively simulate the in-situ motion of the deep-sea pipeline, and enables the staff to design and check the deep-sea pipeline according to the motion state of the deep-sea pipeline, thereby effectively ensuring the in-situ safe operation and stable operation in the whole life cycle of the deep-sea pipeline.

Description

Technical Field

[0001] This invention relates to the field of deep-sea oil development and transportation technology, and in particular to a deep-sea pipeline motion simulation test system. Background Technology

[0002] Currently, the deep sea has become an important area for global oil and gas exploration and development. Deep-sea pipelines are key equipment for deep-sea oil and gas exploration and development, playing a vital role in transporting oil and gas and controlling operations between offshore floating bodies and subsea production systems. As the operating water depth increases, the environmental loads on pipeline systems become more complex, posing greater challenges to the safe operation of deep-sea pipelines in place.

[0003] To ensure the safe operation of deep-sea pipelines in place and their stable operation throughout their entire life cycle, conducting deep-sea pipeline experiments is the most effective method.

[0004] In the field of marine engineering, pool tests are often used to analyze the dynamic response of floating structures (floating platforms, offshore wind turbines, floating production storage and offloading units, etc.), but pool tests are expensive and have a long testing cycle.

[0005] Existing simulation test systems for the movement of deep-sea pipelines without water lack simulation of the interaction between the pipeline and the soil in the contact section, and cannot fully simulate the in-situ movement of deep-sea pipeline systems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a deep-sea pipeline motion simulation test system.

[0007] This invention is achieved through the following technical solution:

[0008] A deep-sea pipeline motion simulation test system includes a motion simulation support and a soil box with an open top side. The soil box is used to fill experimental soil. The motion simulation support includes an upper motion frame, a lower motion frame, and multiple supporting columns. The supporting columns are vertically fixed to the ground. Both the upper and lower motion frames are formed by multiple trusses fixed end to end. Both the upper and lower motion frames are perpendicular to the supporting columns and are slidably connected to the supporting columns. A first driving mechanism is provided between the lower motion frame and the supporting columns. The system includes a second drive assembly between the upper motion frame and the supporting column, multiple support rods mounted above the lower motion frame for supporting the soil box, a connecting frame fixed to the inner side of the upper motion frame, a marine platform model connected to the lower part of the connecting frame via a first vibration table, a pipeline model arranged between the marine platform model and the soil box, one end of the pipeline model being installed to the marine platform model and the other end being installed to the inner wall of the soil box, and sensors for measuring its motion state being installed on the portion of the pipeline model inside the box.

[0009] Preferably, the lower moving frame is formed by four trusses fixed end to end, and the lower moving frame is rectangular in shape. There are four supporting columns, which are respectively arranged at the four corners of the lower moving frame. The soil box is rectangular in shape, and the top of the soil box is provided with downward-facing overlapping grooves on all four sides. There are four bearing rods, which are matched one-to-one with the four overlapping grooves. The ends of the bearing rods are also provided with locking structures between them and the corresponding trusses to keep them relatively fixed.

[0010] Preferably, the surfaces of two of the four bearing rods that intersect are provided with a first scale.

[0011] Preferably, two perpendicular positioning rods are arranged on the inner side of the top of the soil box. Both positioning rods are parallel to the bottom surface of the soil box, and one of the positioning rods is parallel to one side wall of the soil box. The two ends of each positioning rod are slidably connected to the corresponding side wall of the soil box. The surface of the positioning rod is provided with a second scale.

[0012] Preferably, each truss of the lower motion frame is provided with a sliding rod above it, and both ends of the sliding rod are fixed to the corresponding truss. Each end of the bearing rod is provided with a bearing block. The locking structure includes an auxiliary screw and symmetrically arranged arms on both sides of the bearing block. The top of the arms is hinged to the bearing block. The auxiliary screw is used to connect the bottom ends of the two arms. Each side of the two arms is provided with a clamping part. The inner shape of the clamping part is adapted to the shape of the sliding rod. When the auxiliary screw is tightened, the arms clamp to the corresponding sliding rod.

[0013] Preferably, the bottom end of the bearing block is connected to a rotatable pulley, the top end of the clamping part is provided with a clearance opening for avoiding the pulley, the pulley abuts against the corresponding sliding rod, and the rotation axis of the pulley is parallel to the corresponding bearing rod.

[0014] Preferably, it also includes a second vibration table, which is disposed between the soil box and the bottom surface to drive the soil box to move.

[0015] Preferably, a camera is installed on the lower side of the upper motion frame and / or connecting frame.

[0016] Preferably, the bottom of the soil box is provided with multiple casters.

[0017] The beneficial effects of this invention are:

[0018] This invention features a simple structure, reducing costs and simplifying operation compared to conducting experiments in an aquatic environment. By changing different pipeline models and the connection methods between the pipeline models and the offshore platform models, it can simulate various offshore platforms such as tension leg platforms, single-column platforms, semi-submersible platforms, floating production storage and offloading (FPSO) units, and offshore wind turbines. The interaction between the pipeline model and the experimental soil in the soil box simulates the pipe-soil interaction between the deep-sea pipeline's contact section and the seabed under real-world conditions, comprehensively simulating the in-situ movement of deep-sea pipelines. This allows personnel to design and verify deep-sea pipelines based on their movement status, effectively ensuring safe in-situ operation and stable operation throughout their entire life cycle. By using soil boxes, it is unnecessary to lay experimental soil throughout the entire test area, saving experimental costs and reducing preparation time. Furthermore, during the experiment, different types of experimental soil can be simulated by directly replacing different soil boxes, significantly shortening the experimental time. The first vibration table effectively simulates the real motion state of an offshore platform; the second vibration table effectively simulates the vibration of seabed soil caused by seismic loads, further improving the simulation effect; the first scale facilitates the positioning of the soil box by the staff; the second scale facilitates the positioning of the contact point of the pipeline model, and also facilitates the collection of experimental soil trench data formed on the surface of the soil box after the pipe-soil interaction, thus facilitating the analysis of the motion state of the deep-sea pipeline; the locking structure keeps the end of the bearing rod and the slide rod relatively fixed when tightening the auxiliary screw, and allows the bearing rod to move relative to the slide rod without completely disassembling it when loosening the auxiliary screw, thus improving work efficiency; the pulley can save effort when adjusting the position of the soil box by pushing the bearing rod; the camera is used to collect motion images of the pipeline model and images of the formation of the experimental soil trench, further facilitating the analysis of the motion state of the deep-sea pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the soil box described in this invention;

[0021] Figure 3 This is a schematic diagram of the locking structure described in this invention.

[0022] In the diagram: 1. Lower motion frame; 2. Slide rod; 3. Bearing rod; 4. Second vibration table; 5. Soil box; 6. First drive assembly; 7. Support column; 8. Camera; 9. Pipeline model; 10. Offshore platform model; 11. Second drive assembly; 12. First vibration table; 13. Upper motion frame; 14. Connecting frame; 15. Casters; 16. Positioning rod; 17. Overlap groove; 18. Bearing block; 19. Pulley; 20. Arm; 21. Clamping part. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] like Figures 1-3 As shown, the present invention provides a deep-sea pipeline motion simulation test system, including a motion simulation support and a soil box 5 with an open top side. The soil box 5 is used to fill experimental soil. The motion simulation support includes an upper motion frame 13, a lower motion frame 1, and multiple supporting columns 7. The supporting columns 7 are vertically fixed to the ground. Both the upper motion frame 13 and the lower motion frame 1 are formed by multiple trusses fixed end to end. Both the upper motion frame 13 and the lower motion frame 1 are perpendicular to the supporting columns 7. All three moving frames 1 and 13 are slidably connected to the supporting column 7. A first driving component 6 is provided between the lower moving frame 1 and the supporting column 7 to drive the lower moving frame 1 to move up and down along the supporting column 7, thereby simulating different seabed depths. A second driving component 11 is provided between the upper moving frame 13 and the supporting column 7 to drive the upper moving frame 13 to move up and down along the supporting column 7, thereby simulating changes in sea level. The first driving component 6 and the second driving component 11 can be hydraulic cylinders, elevators, or other components. Specifically, in this embodiment...

[0026] The first drive assembly 6 includes a first electric motor fixedly connected to the middle of each support column 7. Four first electric motors are connected to each support column 7 to improve the driving stability of the first drive assembly 6. A first traction cable is wound around the output shaft of the first electric motor. One end of the first traction cable is fixedly connected to the output shaft of the first electric motor, and the other end is fixedly connected to the lower moving frame 1. The second drive assembly 11 includes a second electric motor fixedly connected to the top of each support column 7. Four second electric motors are connected to each support column 7 to improve the driving stability of the second drive assembly 11. A second traction cable is wound around the output shaft of the second electric motor. One end of the second traction cable is fixedly connected to the output shaft of the second electric motor, and the other end is fixedly connected to the upper moving frame 13.

[0027] Multiple support rods 3 are installed above the lower motion frame 1. These support rods 3 support the soil box 5. By adjusting the specific position of the support rods 3 on the lower motion frame 1, the position of the soil box 5 relative to the motion simulation support can be adjusted. This allows experimental soil to be set in a specific area, eliminating the need to lay experimental soil throughout the entire test area, thus saving experimental costs and reducing preparation time. A connecting frame 14 is fixed to the inner side of the upper motion frame 13. Below the connecting frame 14, a marine platform model 10 is connected via a first vibration table 12. The first vibration table 12 is a six-degree-of-freedom vibration table. The operator can select a suitable six-degree-of-freedom vibration table as the first vibration table 12 according to specific experimental needs, which is used to drive the marine platform model 10 to perform six-degree-of-freedom motion, thereby effectively simulating the real motion state of the marine platform. A pipeline model 9 is arranged between the marine platform model 10 and the soil box 5. The operator can select steel pipes, cotton pipes, polyester pipes, plastic pipes, or composite flexible hoses as the pipeline model 9 according to experimental needs to simulate different deep-sea pipelines. One end of the pipeline model 9 is installed to the marine platform model 10. According to experimental needs, the pipeline model 9 can be installed on the offshore platform model 10 by means of suspension or sleeve to simulate different deep-sea pipeline connection methods. By changing different pipeline models 9 and changing the connection method between pipeline model 9 and offshore platform model 10, various offshore platforms such as tension leg platforms, single-column platforms, semi-submersible platforms, floating production storage and offloading (FPSO) units, and offshore wind turbines can be simulated. The other end of the pipeline model 9 is installed on the inner wall of the soil box 5. The interaction between the pipeline model 9 and the experimental soil in the soil box 5 can simulate the pipe-soil interaction between the ground contact section of the deep-sea pipeline and the seabed under real conditions, and comprehensively simulate the in-situ movement of the deep-sea pipeline. The part of the pipeline model 9 located inside the box is equipped with sensors for measuring its movement state, including displacement sensors, velocity sensors and / or acceleration sensors, to measure the movement state of the ground contact section of the pipeline model 9. This facilitates the analysis of the movement state of the deep-sea pipeline under real conditions, enabling the staff to design and verify the deep-sea pipeline based on its movement state, effectively ensuring the safe operation of the deep-sea pipeline in place and its stable operation throughout its entire life cycle.The lower-level motion frame 1 is formed by four trusses fixed end to end. The lower-level motion frame 1 is rectangular in shape. There are four supporting columns 7, which are respectively arranged at the four corners of the lower-level motion frame 1. The soil box 5 is rectangular in shape. The top four sides of the soil box 5 are provided with downward-facing overlapping grooves 17. There are four bearing rods 3, which are matched one-to-one with the four overlapping grooves 17. One pair of opposite overlapping grooves 17 is lower than another pair of opposite overlapping grooves 17, thereby avoiding the four When the support rod 3 interferes with the corresponding truss, a locking structure is provided between the end of the support rod 3 and the corresponding truss to keep them relatively fixed. By adjusting the locking position between the end of the support rod 3 and the corresponding truss, the relative position of the soil box 5 and the offshore platform model 10 can be adjusted. Staff can customize multiple soil boxes 5 and lay different types of experimental soil in different soil boxes 5 in advance according to experimental needs. During the experiment, different types of experimental soil can be simulated by directly replacing different soil boxes 5, which greatly shortens the experimental time.

[0028] Two of the four bearing rods 3 intersect and have a first scale on their surface. By reading the first scale data at the intersection of the two bearing rods 3, the staff can calculate the specific position of the soil box 5, which makes it easier to locate the soil box 5.

[0029] Two perpendicular positioning rods 16 are arranged on the inner side of the top of the soil box 5. Both positioning rods 16 are parallel to the bottom surface of the soil box 5. One of the positioning rods 16 is parallel to one side wall of the soil box 5. The two ends of each positioning rod 16 are slidably connected to the corresponding side wall of the soil box 5. The surface of the positioning rod 16 is provided with a second scale. By moving the two positioning rods 16 and referring to the second scale data at the intersection of the two positioning rods 16, it is convenient to locate the contact point of the pipeline model 9. At the same time, it is convenient to collect experimental soil trench data formed on the surface of the soil box 5 after the pipe-soil interaction, which facilitates the staff to analyze the movement state of the deep-sea pipeline.

[0030] Each truss of the lower motion frame 1 is equipped with a sliding rod 2 above it. The sliding rod 2 is parallel to the corresponding truss, and both ends of the sliding rod 2 are fixed to the corresponding truss. Each end of the bearing rod 3 is provided with a bearing block 18 below it. The locking structure includes an auxiliary screw and clamping arms 20 symmetrically arranged on both sides of the bearing block 18. The top of the clamping arm 20 is hinged to the bearing block 18. One clamping arm 20 has a threaded hole at its bottom corresponding to the auxiliary screw, and the other clamping arm 20 has a through hole at its bottom that matches the outer diameter of the auxiliary screw. The threaded section of the auxiliary screw passes through the through hole and is threaded to the threaded hole. Each side of the two clamping arms 20 is provided with a clamping part 21. The inner shape of the clamping part 21 matches the outer shape of the sliding rod 2.

[0031] When the auxiliary screw is tightened, the clamping arm 20 clamps to the corresponding slide bar 2, at which time the end of the bearing rod 3 remains relatively fixed to the corresponding slide bar 2;

[0032] When the auxiliary screw is loosened, the retaining arm 20 can slide along the corresponding slide bar 2, which facilitates the adjustment of the position of the soil box 5.

[0033] The bottom end of the bearing block 18 is connected to a rotatable pulley 19. The top end of the clamping part 21 is provided with a clearance opening for avoiding the pulley 19. The pulley 19 abuts against the corresponding sliding rod 2. The rotation axis of the pulley 19 is parallel to the corresponding bearing rod 3. When the auxiliary screw is loosened, the pulley 19 can reduce the frictional resistance between the end of the bearing rod 3 and the corresponding sliding rod 2. When the position of the soil box 5 is adjusted by pushing the bearing rod 3, it can save effort.

[0034] A second vibration table 4 is installed between the soil box 5 and the ground. The second vibration table 4 is a six-degree-of-freedom vibration table. The staff can select a suitable six-degree-of-freedom vibration table as the second vibration table 4 according to the specific experimental requirements to simulate the vibration of the seabed soil caused by seismic loads, etc., and further improve the simulation effect.

[0035] A camera 8 is installed on the lower side of the upper motion frame 13 and / or the connecting frame 14 to collect motion images of the pipeline model 9 and images of the formation of the experimental soil trench, which further facilitates the staff to analyze the motion status of the deep-sea pipeline.

[0036] The bottom of the soil box 5 is equipped with multiple casters 15 with braking function, which makes it easy for staff to replace the soil box 5.

[0037] The working principle of the deep-sea pipeline motion simulation test system provided by this invention is as follows: A pipeline model is customized according to experimental requirements; experimental soil is laid inside a soil box; the lower motion frame is lowered to ground level, and the upper motion frame is lowered to a height suitable for installing the marine platform model and the pipeline model; the marine platform model is installed on the first vibration table, and the top of the pipeline model is installed on the marine platform model; the upper motion frame is raised to a preset height; the lower motion frame is raised to a height suitable for installing the soil box; four support rods are moved to the perimeter of the lower motion frame; the soil box is pushed into the test area; while moving the four support rods, the overlapping grooves around the soil box are aligned with the corresponding support rods by adjusting the height of the lower motion frame; the support rods are pushed; and the soil box is precisely positioned by reading the first scale data at the intersection of two support rods.

[0038] If it is not necessary to simulate the vibration of the seabed soil, the end of the bearing rod is kept relatively fixed to the corresponding truss by the locking structure; if it is necessary to simulate the vibration of the seabed soil, the lower moving frame is raised, a second vibration table is installed between the soil box and the ground, and then the lower moving frame is lowered to make the bearing rod disengage from the corresponding overlapping groove, push the bearing rod away from the soil box, and then the end of the bearing rod is kept relatively fixed to the corresponding truss by the locking structure to prevent the bearing rod from hitting the second vibration table when it moves the soil box.

[0039] Install the bottom of the pipeline model onto the inner wall of the soil box, start the first vibration table to drive the offshore platform model to perform six degrees of freedom motion to simulate the real motion state of the offshore platform; if a second vibration table is installed, start the second vibration table according to the experimental requirements to simulate the vibration of the seabed soil caused by seismic loads, etc., to further improve the simulation effect.

[0040] This invention features a simple structure, reducing costs and simplifying operation compared to conducting experiments in an aquatic environment. By changing different pipeline models and the connection methods between the pipeline models and the offshore platform models, it can simulate various offshore platforms such as tension leg platforms, single-column platforms, semi-submersible platforms, floating production storage and offloading (FPSO) units, and offshore wind turbines. The interaction between the pipeline model and the experimental soil in the soil box simulates the pipe-soil interaction between the deep-sea pipeline's contact section and the seabed under real-world conditions, comprehensively simulating the in-situ movement of deep-sea pipelines. This allows personnel to design and verify deep-sea pipelines based on their movement status, effectively ensuring safe in-situ operation and stable operation throughout their entire life cycle. By using soil boxes, it is unnecessary to lay experimental soil throughout the entire test area, saving experimental costs and reducing preparation time. Furthermore, during the experiment, different types of experimental soil can be simulated by directly replacing different soil boxes, significantly shortening the experimental time. The first vibration table effectively simulates the real motion state of an offshore platform; the second vibration table effectively simulates the vibration of seabed soil caused by seismic loads, further improving the simulation effect; the first scale facilitates the positioning of the soil box by the staff; the second scale facilitates the positioning of the contact point of the pipeline model, and also facilitates the collection of experimental soil trench data formed on the surface of the soil box after the pipe-soil interaction, thus facilitating the analysis of the motion state of the deep-sea pipeline; the locking structure keeps the end of the bearing rod and the slide rod relatively fixed when tightening the auxiliary screw, and allows the bearing rod to move relative to the slide rod without completely disassembling it when loosening the auxiliary screw, thus improving work efficiency; the pulley can save effort when adjusting the position of the soil box by pushing the bearing rod; the camera is used to collect motion images of the pipeline model and images of the formation of the experimental soil trench, further facilitating the analysis of the motion state of the deep-sea pipeline.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A deep-sea pipeline motion simulation test system, characterized in that, The device includes a motion simulation support frame and a soil box with an open top side for filling with experimental soil. The motion simulation support frame includes an upper motion frame, a lower motion frame, and multiple supporting columns. The supporting columns are vertically fixed to the ground. Both the upper and lower motion frames are formed by multiple trusses fixed end-to-end. Both the upper and lower motion frames are perpendicular to the supporting columns and are slidably connected to the supporting columns. A first driving component is provided between the lower motion frame and the supporting columns, and a second driving component is provided between the upper motion frame and the supporting columns. The moving assembly includes a lower moving frame with multiple support rods mounted above it to support a soil box. A connecting frame is fixed to the inner side of the upper moving frame. A marine platform model is connected to the lower part of the connecting frame via a first vibration table. A pipeline model is arranged between the marine platform model and the soil box, with one end of the pipeline model attached to the marine platform model and the other end attached to the inner wall of the soil box. Sensors for measuring the motion state are installed on the portion of the pipeline model inside the box. The lower moving frame is formed by four trusses fixed end-to-end. The overall structure is rectangular, with four supporting columns positioned at the four corners of the lower moving frame. The soil box is rectangular in shape, with downward-facing overlapping grooves on all four sides of its top. Four bearing rods are provided, each corresponding to one of the four overlapping grooves. A locking structure is provided between the end of each bearing rod and its corresponding truss to maintain relative fixation. Each truss of the lower moving frame has a sliding rod above it, with both ends fixed to the corresponding truss. The lower ends of the bearing rods are all... The device includes a support block and a locking structure comprising an auxiliary screw and symmetrically arranged arms on both sides of the support block. The top of each arm is hinged to the support block. The auxiliary screw is used to connect the bottom ends of the two arms. Each arm has a clamping part on its opposite side. The inner shape of the clamping part is adapted to the shape of the slide rod. When the auxiliary screw is tightened, the arm clamps to the corresponding slide rod. A rotatable pulley is connected to the bottom of the support block. The top of the clamping part has a clearance opening for avoiding the pulley. The pulley abuts against the corresponding slide rod. The rotation axis of the pulley is parallel to the corresponding support rod.

2. The deep-sea pipeline motion simulation test system according to claim 1, characterized in that, Two of the four load-bearing rods that intersect have a first scale on their surface.

3. The deep-sea pipeline motion simulation test system according to claim 1, characterized in that, Two perpendicular positioning rods are arranged on the inner side of the top of the soil box. Both positioning rods are parallel to the bottom surface of the soil box. One of the positioning rods is parallel to one side wall of the soil box. The two ends of each positioning rod are slidably connected to the corresponding side wall of the soil box. The surface of the positioning rod is provided with a second scale.

4. The deep-sea pipeline motion simulation test system according to claim 1, characterized in that, It also includes a second vibration table, which is located between the soil box and the bottom surface to drive the soil box to move.

5. The deep-sea pipeline motion simulation test system according to claim 1, characterized in that, A camera is installed on the underside of the upper motion frame and / or connecting frame.

6. The deep-sea pipeline motion simulation test system according to claim 1, characterized in that, The bottom of the soil box is equipped with multiple casters.

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