Marine Drilling Riser Soft Suspension Simulation Test Device

Abstract

The present application provides a simulation test device for the soft suspension of an offshore drilling riser. The device includes: a simulation platform on which a first through hole extending in the vertical direction is provided; a telescopic pipe which is inserted into the first through hole and can telescopically extend along the axial direction; a riser which is connected to the telescopic pipe; a tension control mechanism which includes a force applying member and a deformable tension member; the force applying member is connected to the telescopic pipe and the riser through the tension member so as to be able to apply top tension to the riser; a test sensor which is located on the riser; a calculation and control module which is connected to the tension control mechanism and the test sensor; the calculation and control module is used to control the tension control mechanism according to the detection data of the test sensor, and further adjust the top tension. The embodiment of the present application provides a simulation test device for the soft suspension of an offshore drilling riser which can improve the accuracy of the top tension design.

Description

Technical Field

[0001] This application relates to the technical field of offshore oil drilling, and particularly to an offshore drilling riser soft suspension simulation test device. Background Art

[0002] The offshore drilling riser is an important component connecting the subsea wellhead and the drilling ship. Its main functions are to provide a passage for the reciprocating drilling fluid between the wellhead blowout preventer and the drilling ship, support auxiliary pipelines, guide the drill string, and serve as a carrier for lowering and withdrawing the wellhead blowout preventer group, etc. The stability analysis of the platform-suspended riser during towing plays an important role in offshore oil drilling.

[0003] In the existing platform soft suspension riser simulation devices, the contact behavior between the riser tensioner and the riser is usually simplified, and it cannot accurately reflect the contact behavior between the riser in the soft suspension mode and the tensioner. The interaction between the riser and the tension ring caused by the platform offset and the influence of the riser inclination on the distribution of the output top tension of each tensioner are not considered. As the water depth increases, the overall weight of the riser is greater and the marine environment is more severe. The inability to accurately design the effective top tension and grasp the action mechanism between the riser and the tensioner will seriously limit the operation ability and be accompanied by significant operation risks. Summary of the Invention

[0004] In the existing platform soft suspension riser simulation devices, the riser tensioner and the riser are rigidly connected; therefore, the riser tensioner usually applies a vertical force to the top of the riser, so as to simulate the reasonable top tension of the riser under the condition of no wind, waves and ocean currents. However, in the actual drilling process, in order to reduce the degree of bending of the riser under wind, waves and ocean currents; the riser tensioner and the riser are not rigidly connected, so the top tension of the riser obtained by the existing platform soft suspension riser simulation devices is inaccurate under the condition of wind, waves and ocean currents.

[0005] In view of this, the embodiments of this application provide an offshore drilling riser soft suspension simulation test device that can improve the accuracy of top tension design.

[0006] To achieve the above object, the present application provides the following technical solutions: An offshore drilling riser soft suspension simulation test device, comprising: a simulation platform, on which a first through hole extending in the up and down direction is provided; a telescopic pipe, which is inserted into the first through hole; and the telescopic pipe can axially expand and contract; a riser, which is connected to the telescopic pipe; a tension control mechanism, which includes a force applying member and a deformable tension member; the force applying member is connected to the telescopic pipe and the riser through the tension member to be able to apply top tension to the riser; a test sensor, which is located on the riser; a calculation and control module, the calculation and control module is connected to the tension control mechanism and the test sensor; the calculation and control module is used to control the tension control mechanism according to the detection data of the test sensor, and then adjust the top tension.

[0007] As a preferred embodiment, the telescopic pipe includes an outer cylinder and an inner cylinder inserted into the outer cylinder; the inner cylinder is inserted into the first through hole; the outer cylinder can axially move relative to the inner cylinder under the action of the tension control mechanism.

[0008] As a preferred embodiment, the upper end of the outer cylinder is connected to the force applying member through the tension member; the lower end of the outer cylinder is connected to the riser.

[0009] As a preferred embodiment, an annular space is formed between the outer cylinder and the inner cylinder; a sealing packing is arranged in the annular space.

[0010] As a preferred embodiment, the tension member is a tension ring fixedly sleeved on the outer cylinder; the force applying member is a hydraulic rod connected to the tension ring.

[0011] As a preferred embodiment, the tension member is inserted into the outer cylinder; the inner cylinder is inserted into the tension ring.

[0012] As a preferred embodiment, a chuck module and a universal joint module are further arranged on the simulation platform; the universal joint module is located between the chuck module and the simulation platform; the chuck module is used to clamp the inner cylinder; the universal joint module is used to support the chuck module and can adjust the inclination angles of the chuck module in all directions.

[0013] As a preferred embodiment, a plurality of fixing rings with different heights are fixedly sleeved outside the riser, and the test sensor is arranged on each fixing ring, and the test sensor includes a stress sensor and a position sensor.

[0014] As a preferred embodiment, it further includes: a servo control system. The calculation and control module, the gimbal module, and the tension control mechanism are all electrically connected to the servo control system. The calculation and control module is used to collect the detection data of the stress sensor and the position sensor; the servo control system is used to analyze the detection data so as to control the gimbal module and the tension control mechanism; thereby adjusting the tilt angle and the top tension.

[0015] As a preferred embodiment, a slide rail is installed on the simulation platform. The tension control mechanism and the gimbal module are both installed on the slide rail, and the tension control mechanism surrounds the outside of the gimbal module; both the tension control mechanism and the gimbal module can slide horizontally on the slide rail.

[0016] By means of the above technical solutions, the marine drilling riser soft suspension simulation test device described in the embodiments of the present application enables the tension member to buffer the impact force received by the riser by setting up a simulation platform, a telescopic pipe, a riser, a tension control mechanism, a test sensor, and a calculation and control module; thereby reducing the bending degree of the riser; and thus conforming to the actual working conditions. And the displacement and stress of the riser in water flow or ocean current are measured by the test sensor, and the calculation and control module controls the tension control mechanism according to the detection data of the test sensor, thereby adjusting the top tension; thus obtaining the most reasonable top tension. Therefore, the embodiments of the present application provide a marine drilling riser soft suspension simulation test device that can improve the accuracy of top tension design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are only for the purpose of explanation and are not intended to limit the scope of the disclosure of the present application in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in the understanding of the present application, and do not specifically limit the shapes and proportional dimensions of the components of the present application. Those skilled in the art can, under the teaching of the present application, select various possible shapes and proportional dimensions according to specific circumstances to implement the present application. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the marine drilling riser soft suspension simulation test device according to the embodiment of the present application;

[0019] Figure 2 is a schematic diagram of the telescopic pipe of the marine drilling riser soft suspension simulation test device according to the embodiment of the present application;

[0020] Figure 3 is a schematic diagram of the fixing ring of the marine drilling riser soft suspension simulation test device according to the embodiment of the present application;

[0021] Figure 4 The front view of the universal joint module and the chuck module of the marine drilling riser soft suspension simulation test device according to the embodiment of the present application;

[0022] Figure 5 The top view of the chuck module of the marine drilling riser soft suspension simulation test device according to the embodiment of the present application.

[0023] Explanation of the reference numerals:

[0024] 11, simulation platform; 13, telescopic pipe; 15, riser; 17, tension control mechanism; 19, force application member; 21, tension member; 22, calculation and control module; 23, test sensor; 25, outer cylinder; 27, inner cylinder; 31, chuck module; 32, universal joint module; 33, fixing ring; 34, stress sensor; 35, position sensor; 37, base; 41, support plate; 43, cylinder barrel; 52, piston; 53, connecting rod; 54, spring; 55, first locking portion; 61, second locking portion; 63, servo control system; 65, container; 67, horizontal plane; 69, base; 71, clamping teeth; 73, hydraulic unit. Specific embodiments

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] Please refer to Figures 1 to 5, a soft suspension simulation test device for an offshore drilling riser 15 provided by this embodiment includes: a simulation platform 11, on which a first through hole extending in the up-down direction is provided; a telescopic pipe 13, which is inserted into the first through hole; and the telescopic pipe 13 can telescopically move along the axial direction; a riser 15, which is connected to the lower end of the telescopic pipe 13; a tension control mechanism 17, which includes a force application member 19 and a deformable tension member 21; the force application member 19 is connected to the telescopic pipe 13 and the riser 15 through the tension member 21 to be able to apply a top tension to the riser 15; a test sensor 23, which is located on the riser 15; a calculation and control module 22, and the calculation and control module 22 is used to collect the detection data of the test sensor 23 to be able to control the tension control mechanism 17 according to the data, and further adjust the top tension.

[0028] During the test, the simulation platform 11 is installed on a vessel 65 filled with a fluid of a certain depth to simulate the deep sea; and the riser 15 is inserted into the deep sea of the vessel 65 so that the water flow in the vessel 65 will have an impact on the riser 15. Or the simulation platform 11 is installed or erected on a drilling ship, and the riser 15 is extended into the ocean current to have an impact on the riser 15 through the ocean current in the ocean. Since the force application member 19 of the tension control mechanism 17 is connected to the telescopic pipe 13 and the riser 15 through the tension member 21 to be able to apply a top tension to the riser 15; when the riser 15 is impacted by the water flow or ocean current, the tension member 21 can buffer the impact force received by the riser 15; further reduce the bending degree of the riser 15; and further conform to the actual working conditions. Further, the displacement and stress received by the riser 15 in the water flow or ocean current can be measured through the test sensor 23, and the calculation and control module 22 can control the tension control mechanism 17 according to the detection data of the test sensor 23, and further adjust the top tension; so as to obtain the most reasonable top tension. Therefore, the top tension applied to the riser 15 by the soft suspension simulation test device for the offshore drilling riser 15 described in the embodiment of the present application is more accurate. Further still, since the riser 15 is connected to the lower end of the telescopic pipe 13; and the telescopic pipe 13 can telescopically move along the axial direction; the telescopic pipe 13 can elongate within a certain range under the action of the axial tensile force, so as to compensate for the axial relative displacement between the ship and the riser 15.

[0029] As can be seen from the above solution, the soft suspension simulation test device for the marine drilling riser 15 according to the embodiment of the present application enables the tension member 21 to buffer the impact force received by the riser 15 by setting the simulation platform 11, the telescopic pipe 13, the riser 15, the tension control mechanism 17, the test sensor 23, and the calculation and control module 22; thereby reducing the bending degree of the riser 15; and thus conforming to the actual working conditions. And the displacement and stress of the riser 15 in the water flow or ocean current are measured by the test sensor 23, and the calculation and control module 22 controls the tension control mechanism 17 according to the detection data of the test sensor 23, so as to adjust the top tension; thereby obtaining the most reasonable top tension.

[0030] As Figure 1 shown, in this embodiment, the simulation platform 11 is used to be installed on a vessel 65 filled with a liquid of a certain depth to simulate the deep sea. For example, as Figure 1 shown, the liquid in the vessel 65 has a water level 67. Or the simulation platform 11 is used to be installed or erected on a drilling ship to generate an impact on the riser 15 by the ocean current in the ocean. Further, a first through hole extending in the up and down direction is provided on the simulation platform 11. For example, as Figure 1 shown, the simulation platform 11 extends in the left and right direction. A first through hole extending in the up and down direction is provided on the simulation platform 11 extending in the left and right direction.

[0031] In this embodiment, the telescopic pipe 13 is inserted into the first through hole. And the telescopic pipe 13 can telescopically move along the axial direction. For example, as Figure 1 shown, the telescopic pipe 13 extends in the up and down direction. Thus, the telescopic pipe 13 can telescopically move in the up and down direction. Further, a first through channel that penetrates the telescopic pipe 13 along its extending direction is provided inside the telescopic pipe 13. The first through channel is used for the drilling fluid to pass through.

[0032] In one embodiment, as Figure 2 shown, the telescopic pipe 13 includes an outer cylinder 25 and an inner cylinder 27 inserted into the outer cylinder 25. That is, a nested structure is formed between the outer cylinder 25 and the inner cylinder 27. The inner cylinder 27 is inserted into the first through hole, and the outer cylinder 25 can axially move relative to the inner cylinder 27 under the action of the tension control mechanism 17. Specifically, the inner cylinder 27 does not axially move relative to the simulation platform 11, while the outer cylinder 25 can axially move relative to the simulation platform 11, and thus the outer cylinder 25 can axially move relative to the inner cylinder 27, so that the telescopic pipe 13 can telescopically move along its axial direction. For example, as Figure 2 shown, the outer cylinder 25 can move in the up and down direction relative to the simulation platform 11. Thus, the outer cylinder 25 can move in the up and down direction relative to the inner cylinder 27, and further the telescopic pipe 13 can telescopically move in the up and down direction.

[0033] In this embodiment, the riser 15 is connected to the telescopic pipe 13. Specifically, the riser 15 is connected to the outer cylinder 25, so that when there is a relative displacement in the axial direction between the ship and the riser 15, the outer cylinder 25 can move relative to the inner cylinder 27 to compensate for the relative displacement, thereby simulating the working conditions of the riser 15 under the impact of water flow or ocean current.

[0034] In this embodiment, the tension control mechanism 17 includes a force applying member 19 and a tension member 21 that can deform. The force applying member 19 is connected to the telescopic pipe 13 and the riser 15 through the tension member 21 to be able to apply top tension to the riser 15. Specifically, the tension member 21 is a tension ring fixedly sleeved on the outer cylinder 25. The fixing method can be screw fixing, bolt fixing, welding fixing, etc., and this application does not make regulations on this. The tension ring can be fixedly sleeved on the outer wall of the outer cylinder 25. Of course, the tension ring can also be fixedly sleeved on the inner wall of the outer cylinder 25. Thus, the tension ring can be connected to the outer cylinder 25; that is, the tension ring is connected to the riser 15. The force applying member 19 is a hydraulic rod connected to the tension ring. Thus, the hydraulic rod is connected to the riser 15 through the tension ring; furthermore, the hydraulic rod can apply hydraulic pressure to the tension ring, and the tension ring can transmit the hydraulic pressure to the riser 15, thereby applying top tension to the riser 15.

[0035] Furthermore, the tension ring can deform. Specifically, the tension ring can, for example, deform radially or axially. Further, the tension ring can be a ring with a notch made of iron. Or the tension ring is a complete ring made of rubber.

[0036] Further, the upper end of the outer cylinder 25 is connected to the force applying member 19 through the tension ring. The lower end of the outer cylinder 25 is connected to the riser 15. Thus, on the one hand, the outer cylinder 25 can be connected to the force applying member 19 through the tension ring; on the other hand, the riser 15 can be connected to the force applying member 19 through the tension ring. Thus, when the riser 15 is impacted by water flow or ocean current and swings under the action of the impact force, the tension member 21 can buffer the swing, thereby reducing the bending degree of the riser 15.

[0037] Further, the tension ring is disposed inside the outer cylinder 25; the inner cylinder 27 is disposed inside the tension ring. The force applying member 19 is connected to the tension ring. For example, as Figure 2 shown, the lower end of the force applying member 19 is connected to the tension ring. The connection method can be screw connection, bolt connection, welding, integral molding, etc. Thus, on the one hand, the outer cylinder 25 can move in the up and down direction relative to the inner cylinder 27 under the action of the force applying member 19; on the other hand, the force applying member 19 can apply a force to the outer cylinder 25 through the tension ring. Furthermore, the outer cylinder 25 can transmit the force to the riser 15 to apply top tension to the riser 15. And for example, as Figure 1As shown, when the riser 15 swings in the left - right direction under the impact of water flow or ocean current, the riser 15 will drive the outer cylinder 25 to swing in the left - right direction; when the outer cylinder 25 swings in the left - right direction, its upper end will be restricted by the tension ring, and thus its swing in the left - right direction is limited. And the swing of the riser 15 in the left - right direction is also restricted.

[0038] Further, the riser 15 has a second through - channel that runs through it along its extension direction. This second through - channel is used for the drilling fluid to pass through. And the second through - channel is connected to the lower end of the first through - channel. Thus, the drilling fluid in the first through - channel can flow into the second through - channel.

[0039] Preferably, an annular space is formed between the outer cylinder 25 and the inner cylinder 27. A sealing packing is arranged in the annular space. This sealing packing is used to seal the annular space; thus preventing the drilling fluid in the riser 15 from leaking from the annular space.

[0040] In one embodiment, a clamping mechanism for clamping the inner cylinder 27 is further arranged on the simulation platform 11.

[0041] Specifically, a chuck module 31 and a universal joint module 32 are further arranged on the simulation platform 11. The universal joint module 32 is located between the chuck module 31 and the simulation platform 11. For example, Figure 1 As shown, the chuck module 31 is located above the simulation platform 11. The universal joint module 32 is located below the chuck module 31 and above the simulation platform 11. The chuck module 31 is used to clamp the inner cylinder 27. Thus, through the clamping of the chuck module 31, the inner cylinder 27 can pass through the first through - hole on the simulation platform 11. The universal joint module 32 is used to support the chuck module 31 and can adjust the tilting angle of the chuck module 31 in all directions. Thus, when the riser 15 is impacted by water flow or ocean current, the tilting angle of the inner cylinder 27 of the telescopic pipe 13 can be adjusted through the universal joint module 32, thereby simulating the actual working conditions.

[0042] Further, as Figure 4 、 Figure 5 shown, the chuck module 31 includes: a base 69, a plurality of clamping teeth 71 and a plurality of hydraulic units 73. A fourth through - hole is arranged on the base 69. The plurality of clamping teeth 71 are circumferentially distributed around the fourth through - hole. The plurality of hydraulic units 73 are arranged on the base 69. And the plurality of hydraulic units 73 correspond to the plurality of clamping teeth 71. This correspondence can be that the number of hydraulic units 73 is equal to the number of clamping teeth 71. One end of each hydraulic unit 73 is connected to the corresponding clamping tooth 71; the other end of each hydraulic unit 73 is connected to the base 69. The hydraulic unit 73 can expand and contract along the radial direction of the fourth through - hole to drive the clamping tooth 71 to move radially; thus clamping and releasing the inner pipe passing through the first through - hole.

[0043] Further, the gimbal module 32 includes a base 37, a support plate 41, and a plurality of adjusting mechanisms. The base 37 has a second through hole extending in the up and down direction. The support plate 41 has a third through hole extending in the up and down direction. Both the second through hole and the third through hole are for the inner tube of the telescopic tube 13 to pass through. The chuck module 31 is fixed to the support plate 41. The plurality of adjusting mechanisms are located between the support plate 41 and the base 37, and the adjusting mechanisms are circumferentially distributed around the axis of the third through hole. Since the chuck module 31 clamps the inner tube, when the riser 15 is impacted by water flow or ocean current, the riser 15 will tilt. On the one hand, the adjusting mechanisms are used to support the weight of the chuck module 31 and the riser 15, and on the other hand, they can match the degree of tilt that the riser 15 may occur.

[0044] Further, as Figure 4 shown, the adjusting mechanism includes a cylinder 43, a piston 52, a connecting rod 53, and a spring 54. The cylinder 43 is fixed to the base 37. The piston 52 is disposed in the cylinder 43. The upper end of the connecting rod 53 is connected to the support plate 41, and the lower end of the connecting rod 53 extends into the cylinder 43 and is connected to the upper end of the piston 52. The spring 54 is sleeved outside the connecting rod 53. The upper end of the spring 54 abuts against the support plate 41, and the lower end of the spring 54 abuts against the upper surface of the cylinder 43. In this way, the spring 54 can adjust the degree of tilt of the support plate 41.

[0045] In this embodiment, the test sensor 23 is located on the riser 15. Specifically, a plurality of fixing rings 33 with different heights are fixedly sleeved outside the riser 15. The test sensor 23 is disposed on each fixing ring 33. The test sensor 23 includes a stress sensor 34 and a position sensor 35. Thus, the stress and displacement of the riser 15 when it is impacted by water flow or ocean current can be detected through the test sensor 23.

[0046] Further, as Figure 3 shown, the fixing ring 33 is a ring with a notch. First locking portions 55 and second locking portions 61 are provided on the inner walls opposite to the notch. Through holes are formed in the first locking portions 55 and the second locking portions 61, and bolts are inserted through the through holes. Thus, the fixing ring 33 can be fixedly sleeved on the outer wall of the riser 15 through the bolts.

[0047] Further, the stress sensor 34 and the position sensor 35 can be located on opposite sides of the fixing ring 33. The stress sensor 34 and the position sensor 35 can be fixedly connected to the fixing ring 33 by screws or the like. The position sensor 35 is used to measure the offset of the riser 15 in the X direction, Y direction, and Z direction in space.

[0048] In one embodiment, a slide rail is installed on the simulation platform 11. For example, asFigure 1 As shown, the slide rail extends in the left - right direction. Both the tension control mechanism 17 and the gimbal module 32 are installed on the slide rail. Both the tension control mechanism 17 and the gimbal module 32 can slide horizontally on the slide rail. And the tension control mechanism 17 surrounds the outside of the gimbal module 32. Thus, when the riser 15 is impacted by water flow or ocean current, the riser 15 exerts a horizontal force on the telescopic pipe 13; and when the telescopic pipe 13 transmits this force to the tension control mechanism 17 and the gimbal module 32, both the tension control mechanism 17 and the gimbal module 32 can move along the slide rail, thereby restricting the riser 15 from moving significantly in the horizontal direction.

[0049] In this embodiment, the calculation control module 22 is connected to the tension control mechanism 17 and the test sensor 23. Specifically, the calculation control module 22 can be connected to the tension control mechanism 17 and the test sensor 23 through wires. Or the calculation control module 22 can be connected to the tension control mechanism 17 and the test sensor 23 through a wireless transmission method. The calculation control module 22 is used to control the tension control mechanism 17 according to the detection data of the test sensor 23, and then adjust the top tension. Further, the calculation control module 22 can be a computer or a mobile phone, etc.

[0050] In one embodiment, the soft - suspension simulation test device for an offshore drilling riser 15 according to the embodiment of the present application further includes: a servo control system 63. The calculation control module 22, the gimbal module 32, and the tension control mechanism 17 are all electrically connected to the servo control system 63. The calculation control module 22 is used to collect the detection data of the stress sensor 34 and the position sensor 35; the servo control system 63 is used to analyze the detection data to control the gimbal module 32 and the tension control mechanism 17; and then adjust the tilt angle and the top tension. Thus, through the servo control system 63, the gimbal module 32 and the tension control mechanism 17 can be controlled according to the detection data of the stress sensor 34 and the position sensor 35, so that the tilt angle and the top tension of the riser 15 when it is impacted by water flow or ocean current can be in a better state, and then accurate tilt angle and top tension can be obtained.

[0051] It should be noted that in the description of the present application, terms such as "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects, and there is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0052] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and many applications other than the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined with reference to the above description, but rather should be determined with reference to the foregoing claims and the full scope of equivalents to which those claims are entitled. For the sake of completeness, all articles and references, including the disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter to be a part of the disclosed subject matter of the application.

Claims

1. An offshore drilling riser soft suspension simulation test device, characterized in that, Comprising: A simulation platform, on which a first through hole extending in the up and down direction is provided; A telescopic pipe, which is inserted into the first through hole; and the telescopic pipe can telescopically move along the axial direction; A riser pipe, which is connected to the telescopic pipe; A tension control mechanism, which includes a force applying member and a deformable tension member; the force applying member is connected to the telescopic pipe and the riser pipe through the tension member, so as to be able to apply top tension to the riser pipe; A test sensor, which is located on the riser pipe; A calculation and control module, the calculation and control module is connected to the tension control mechanism and the test sensor; the calculation and control module is used to control the tension control mechanism according to the detection data of the test sensor, so as to adjust the top tension; The telescopic pipe includes an outer cylinder and an inner cylinder inserted into the outer cylinder; the inner cylinder is inserted into the first through hole; the outer cylinder can axially move relative to the inner cylinder under the action of the tension control mechanism; The upper end of the outer cylinder is connected to the force applying member through the tension member; the lower end of the outer cylinder is connected to the riser pipe; A chuck module and a universal joint module are further provided on the simulation platform; the universal joint module is located between the chuck module and the simulation platform; the chuck module is used to clamp the inner cylinder; the universal joint module is used to support the chuck module and can adjust the tilt angles in all directions of the chuck module; A plurality of fixing rings with different heights are fixedly sleeved outside the riser pipe, and the test sensor is provided on each fixing ring, and the test sensor includes a stress sensor and a position sensor; A servo control system, the calculation and control module, the universal joint module, and the tension control mechanism are all electrically connected to the servo control system, and the calculation and control module is used to collect the detection data of the stress sensor and the position sensor; the servo control system is used to analyze the detection data, so as to be able to control the universal joint module and the tension control mechanism; and then adjust the tilt angle and the top tension.

2. The marine riser soft suspension simulation test device according to claim 1, wherein An annular space is formed between the outer cylinder and the inner cylinder; a sealing packing is arranged in the annular space.

3. The marine riser soft suspension simulation test device according to claim 1, characterized in that, The tension member is a tension ring fixedly sleeved on the outer cylinder; the force applying member is a hydraulic rod connected to the tension ring.

4. The marine riser soft suspension simulation test device according to claim 3, wherein, The tension member is inserted into the outer cylinder; the inner cylinder is inserted into the tension ring.

5. The marine drilling riser soft suspension simulation test device according to claim 1, wherein, A slide rail is installed on the simulation platform, the tension control mechanism and the universal joint module are both installed on the slide rail, and the tension control mechanism surrounds the outside of the universal joint module; the tension control mechanism and the universal joint module can both slide horizontally on the slide rail.

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