Fatigue monitoring test device and method for deepwater drilling pipe

Abstract

The invention relates to the field of offshore oil engineering equipment, and discloses a deepwater drilling pipe fatigue monitoring test device and method. According to the invention, the stress data and the stress response data of the deepwater drilling pipe model under the wave current coupling effect and the top reciprocating motion can be tested, the fatigue monitoring damage of the deepwater drilling pipe model is evaluated according to the stress data and the stress response data, and then the fatigue monitoring damage of the deepwater drilling riser and the underwater wellhead system conduit section is evaluated. And an effective fatigue monitoring test mode is provided for a deepwater drilling riser and an underwater wellhead system conduit section.

Description

Technical Field

[0001] The invention relates to the field of offshore oil engineering equipment, and in particular to a deepwater drilling pipe fatigue monitoring test device and method. Background Art

[0002] Deepwater drilling risers and underwater wellhead systems are the connecting channels between oil and gas wells and blowout preventers during offshore drilling, and are also important equipment for deepwater oil and gas drilling.

[0003] During the connection operations such as drilling, completion and workover, deepwater drilling risers and underwater wellhead systems will be subjected to cyclic loads transmitted by riser vibrations caused by waves and currents, platform movements and operational dynamic loads, resulting in cyclic bending moments and fatigue damage.

[0004] In order to solve the problem of fatigue damage monitoring and assessment of deepwater drilling risers and underwater wellhead systems, an effective fatigue monitoring test method is urgently needed. Summary of the invention

[0005] The present invention provides a deepwater drilling pipe fatigue monitoring test device and method, which provide an effective fatigue monitoring test mode for deepwater drilling riser and underwater wellhead system guide tube section.

[0006] In a first aspect, the present invention provides a deepwater drilling pipe fatigue monitoring test device, comprising: An open soil box, wherein soil of a first preset height is placed; an open water pool, in which water of a second preset height is placed, and is arranged on the top of the open earth box; A wave and current generating module is arranged in the open water pool and is used for generating waves and currents in the open water pool; The sliding module has a top end fixed on the truss and can reciprocate in the horizontal direction; A deepwater drilling pipe model, a first dynamometer and a second dynamometer; the deepwater drilling pipe model passes through the bottom of the open water pool in the vertical direction and is inserted into the soil of the open soil box, the bottom end of which is rigidly connected to the bottom of the open soil box through the first dynamometer, the top end is located above the water surface of the open water pool, and the top end is rigidly connected to the bottom end of the sliding module through the second dynamometer, and moves under the drive of the sliding module; the first dynamometer and the second dynamometer are used to measure the force data of the deepwater drilling pipe model; An optical fiber sensor is arranged on the outer surface of the deep-water drilling pipe model and is used to collect force response data of the deep-water drilling pipe model; a control and analysis module, connected to the sliding module, the wave and current generating module, the first dynamometer, the second dynamometer and the optical fiber sensor, for performing a dynamic response test on the deep-water drilling pipe model by controlling the operating states of the sliding module and the wave and current generating module, and performing fatigue monitoring on the deep-water drilling pipe model according to the force data measured by the first dynamometer and the second dynamometer and the force response data collected by the optical fiber sensor.

[0007] Optionally, the deepwater drilling pipe model is obtained by truncated and scaled-down simulation of the deepwater drilling riser and underwater wellhead conduit.

[0008] Optionally, the deepwater drilling pipe model includes a drilling riser model, a lower flexible joint model, a blowout preventer model, an underwater wellhead model and a surface conduit model that are rigidly connected in sequence; Wherein, the top of the drilling riser model is located above the water surface of the open water pool, and the top of the drilling riser model is rigidly connected to the bottom end of the sliding module through the second dynamometer; The lower flexible joint model and the blowout preventer model are located in the open water pool; The underwater wellhead model penetrates the bottom of the open water pool and is inserted into the soil of the open soil box; The bottom end of the surface conduit model is rigidly connected to the bottom of the open soil box through the first dynamometer.

[0009] Optionally, the drilling riser model is a non-homogeneous multi-layer cylindrical tube structure composed of three layers of materials, which are lead rods, aluminum tubes, and high-density polyethylene tubes from the inside to the outside.

[0010] Optionally, the first force measuring instrument and the second force measuring instrument are six-component force measuring instruments, and the optical fiber sensor includes an optical fiber acceleration sensor and an optical fiber strain sensor.

[0011] Optionally, the device further comprises: An environmental parameter measurement module, disposed in the open water pool, communicatively connected to the control and analysis module, and used for measuring wave and current characteristic data in the open water pool; The control and analysis module is also used to perform fatigue monitoring on the deep-water drilling pipe model based on the force data measured by the first force meter and the second force meter and the force response data collected by the optical fiber sensor, as well as the wave and current characteristic data measured by the environmental parameter measurement module.

[0012] Optionally, the environmental parameter measurement module includes a Doppler flow profiler and a wave meter, and the wave and flow characteristic data includes water flow velocity, wave height and wave period.

[0013] In a second aspect, the present invention provides a deepwater drilling pipe fatigue monitoring test method, which is applied to the deepwater drilling pipe fatigue monitoring test device of the first aspect or any corresponding embodiment thereof, wherein the control analysis module is connected to the sliding module, the wave flow generating module, the first dynamometer, the second dynamometer and the optical fiber sensor; the method comprises: The control and analysis module performs a dynamic response test on the deepwater drilling pipe model by controlling the operating states of the wave and current generating module and the sliding module; The control and analysis module measures the force data of the deepwater drilling pipe model through the first force gauge and the second force gauge, and collects the force response data of the deepwater drilling pipe model through the optical fiber sensor; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data.

[0014] Optionally, the control and analysis module performs a dynamic response test on the deepwater drilling pipe model by controlling the operating states of the wave flow generating module and the sliding module, including: The control and analysis module applies wave-current coupling to the deep-water drilling pipe model by controlling the wave-current generating module to generate waves and currents in an open water pool, and drives the deep-water drilling pipe model to move by controlling the sliding module to perform reciprocating motion in the horizontal direction, so as to perform a dynamic response test on the deep-water drilling pipe model.

[0015] Optionally, the device further comprises an environmental parameter measurement module; the environmental parameter measurement module is arranged in the open water pool and is communicatively connected to the control and analysis module; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data, including: The control and analysis module collects wave and current characteristic data in the open water pool through the environmental parameter measurement module; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data, the force response data and the wave and current characteristic data.

[0016] The present invention provides a deepwater drilling pipe fatigue monitoring test device and method. The present invention can test the force data and force response data of the deepwater drilling pipe model under the wave-current coupling and top reciprocating motion, evaluate the fatigue monitoring damage of the deepwater drilling pipe model according to the force data and force response data, and then evaluate the fatigue monitoring damage of the deepwater drilling riser and the underwater wellhead system conduit section, providing an effective fatigue monitoring test method for the deepwater drilling riser and the underwater wellhead system conduit section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of a deepwater drilling pipe fatigue monitoring test device provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a deepwater drilling riser model provided by an embodiment of the present invention; Figure 3 A flow chart of another deepwater drilling pipe fatigue monitoring test method provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a control analysis module provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a computer device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Combine the following Figure 1-Figure 2 The present invention describes a deepwater drilling pipe fatigue monitoring test device.

[0021] like Figure 1 As shown, this embodiment proposes a first deepwater drilling pipe fatigue monitoring test device, which may include: An open soil box 10, wherein soil of a first preset height is placed inside; An open water pool 9, in which water of a second preset height is placed, is arranged on the top of the open earth box 10; A wave and current generating module is arranged in the open water pool 9 and is used to generate waves and currents in the open water pool 9; The sliding module 7 has a top end fixed on the truss and can reciprocate in the horizontal direction; A deepwater drilling pipe model 5, a first dynamometer 8 and a second dynamometer 6; the deepwater drilling pipe model 5 passes through the bottom of an open water pool 9 in a vertical direction and is inserted into the soil of an open soil box 10, the bottom end of which is rigidly connected to the bottom of the open soil box 10 through the first dynamometer 8, the top end of which is located above the water surface of the open water pool 9, and the top end of which is rigidly connected to the bottom end of a sliding module 7 through the second dynamometer 6, and moves under the drive of the sliding module 7; the first dynamometer 8 and the second dynamometer 6 are used to measure the force data of the deepwater drilling pipe model 5; The optical fiber sensor is arranged on the outer surface of the deep-water drilling pipe model 5 and is used to collect the force response data of the deep-water drilling pipe model 5; The control and analysis module is connected to the sliding module 7, the wave and current generating module, the first dynamometer 8, the second dynamometer 6 and the optical fiber sensor, and is used to perform a dynamic response test on the deep-water drilling pipe model 5 by controlling the operating states of the sliding module and the wave and current generating module, and to perform fatigue monitoring on the deep-water drilling pipe model 5 according to the force data measured by the first dynamometer 8 and the second dynamometer 6 and the force response data collected by the optical fiber sensor.

[0022] It should be noted that the deepwater drilling pipe may include a deepwater drilling riser, a conduit section in an underwater wellhead system, and a connection portion therebetween. The deepwater drilling pipe model is used to simulate the deepwater drilling pipe.

[0023] Among them, the first preset height and the second preset height can be set by technicians according to actual conditions.

[0024] Specifically, the first preset height and the second preset height may be the height of the open soil box 10 and the height of the water pool, respectively. At this time, the open soil box 10 may be filled with soil, and the open water pool 9 may be filled with water.

[0025] Specifically, the wave and flow generating module can exert force on the water in the open water pool 9 to create waves and flows in the open water pool 9 .

[0026] The truss may be a fixed truss.

[0027] Specifically, the sliding module 7 may include a reciprocating slide rail and a motor. The reciprocating slide rail can perform horizontal reciprocating motion under the action of the motor, driving the deep-water drilling pipe model 5 to move from the top of the deep-water drilling pipe model 5, simulating the top offset of the deep-water drilling riser and the underwater wellhead conduit.

[0028] Specifically, the deepwater drilling pipe model 5 is used to simulate the deepwater riser, the underwater wellhead system conduit section and the connection part therebetween.

[0029] Optionally, the deepwater drilling pipe model 5 is obtained by truncating and scaling down the deepwater drilling riser and the underwater wellhead conduit.

[0030] Specifically, this embodiment can design a scaled-down experimental model of the deepwater riser-underwater wellhead system conduit section based on similarity theory (similar principles such as geometry, Froude number or Reynolds number), perform truncation design according to the depth of the experimental water pool, and manufacture a deepwater drilling pipe model 5 that meets the scaled-down requirements such as stiffness, wet weight and outer diameter, so as to complete the design of a deepwater underwater wellhead system fatigue monitoring pool experiment under wave-current coupling and top reciprocating motion.

[0031] Specifically, this embodiment can test the local stress load characteristics at the deepwater drilling pipe model 5 under the action of wave-current coupling and top reciprocating motion, and use the monitoring data of the deepwater drilling pipe model 5 to evaluate the fatigue monitoring damage of the deepwater drilling riser and the underwater wellhead.

[0032] It should be noted that when conducting underwater wellhead-drilling riser experiments in the ocean, relevant technologies often scale down and truncate the experimental model based on similarity theory (geometry, Froude number or Reynolds number and other similarity principles) to adapt to the depth of the experimental pool. However, in this experiment, the application depth of the underwater wellhead drilling riser is generally over 1000m. Even after scaling down at a ratio of 1:50, the pool depth still needs to exceed 20m, which is too high. In this experiment, the wellhead system fatigue monitoring pool experiment is mainly for regularity research, and the experiment can be carried out without strict scaling according to the prototype, and a truncated scaling experiment can be used.

[0033] Specifically, this embodiment can carry out deepwater underwater wellhead system fatigue monitoring tank experiments under different wave and current coupling effects and top reciprocating motion with different amplitude periods, so as to realize the subsequent study on the variation law of deepwater underwater wellhead fatigue damage. By using the underwater wellhead system fatigue damage tank experiment data processing method and using the deepwater riser-underwater wellhead system guide tube section monitoring data analysis to calculate the wellhead fatigue damage, a comparative study is carried out with the wellhead fatigue damage results predicted based on environmental data such as wave and current, and the variation law of deepwater underwater wellhead fatigue damage under different influencing factors such as current, wave, and top reciprocating motion is studied.

[0034] Optionally, the deepwater drilling pipe model 5 includes a drilling riser model, a lower flexible joint model 4, a blowout preventer model 3, an underwater wellhead model 1 and a surface conduit model 2 which are rigidly connected in sequence; The top of the drilling riser model is located above the water surface of the open pool 9, and the top of the drilling riser model is rigidly connected to the bottom of the sliding module 7 through the second dynamometer 6; The lower flexible joint model 4 and the blowout preventer model 3 are located in an open water pool 9; The underwater wellhead model 1 passes through the bottom of the open water pool 9 and is inserted into the soil of the open soil box; The bottom end of the surface conduit model 2 is rigidly connected to the bottom of the open soil box 10 through the first dynamometer 8 .

[0035] Among them, the lower flexible joint model 4 , the blowout preventer model 3 and most of the drilling riser models are located in the open water pool 9 .

[0036] Specifically, the first dynamometer 8 is installed at the bottom of the surface conduit model 2 and fixed to the bottom of the open soil box. The first dynamometer 8 can monitor the stress conditions in the six degrees of freedom directions of the bottom.

[0037] Specifically, a second dynamometer 6 is installed on the top of the drilling riser model and fixed on a reciprocating slide rail. The second dynamometer 6 can monitor the force conditions in the six degrees of freedom directions of the top.

[0038] Among them, the lower flexible joint model 4 can be a hinged joint.

[0039] The surface conduit model 2 is entirely located in the soil and is mainly used to simulate the conduit-soil interaction.

[0040] It should be noted that in the preliminary experimental design, the open water pool 9 has the ability to generate loads such as waves and currents, and the equivalent soil box at the bottom has a certain depth to enable the conduit under the underwater wellhead to be in the soil.

[0041] Optionally, the drilling riser model is a non-homogeneous multi-layer cylindrical tube structure composed of three layers of materials, which are lead rod 501, aluminum tube 502, and high-density polyethylene tube 503 from inside to outside.

[0042] Specifically, the drilling riser model can use lead rod 501, aluminum tube 502 and high-density polyethylene tube 503 as core rods to simulate the riser model according to the difference in stiffness and outer diameter, and the overall requirements of stiffness, wet weight and outer diameter are achieved. Before the experiment, the outer diameter, mass, bending stiffness and axial stiffness of the model pipe are measured.

[0043] Specifically, Figure 2 As shown, the drilling riser model can be a non-homogeneous multi-layer cylindrical structure composed of three layers of different materials. The drilling riser model is composed of a lead rod 501, an aluminum tube 502, and a high-density polyethylene tube 503 from the inside to the outside. The lead rod 501, the aluminum tube 502, and the high-density polyethylene tube 503 are coated in sequence. Among them, the lead rod 501 mainly meets the wet weight requirement, the aluminum tube 502 mainly bears the bending stiffness requirement, and the high-density polyethylene tube 503 considers part of the bending stiffness, the drag outer diameter, and the wet weight requirement.

[0044] Optionally, the first force measuring instrument 8 and the second force measuring instrument 6 are six-component force measuring instruments, and the optical fiber sensor includes an optical fiber acceleration sensor 11 and an optical fiber strain sensor 12 .

[0045] Optionally, the above device further comprises: An environmental parameter measurement module is disposed in the open water pool 9 and is in communication connection with the control and analysis module, and is used to measure wave and current characteristic data in the open water pool 9; The control and analysis module is also used to perform fatigue monitoring on the deepwater drilling pipe model 5 based on the force data measured by the first dynamometer 8 and the second dynamometer 6 and the force response data collected by the optical fiber sensor, as well as the wave and current characteristic data measured by the environmental parameter measurement module.

[0046] Optionally, the environmental parameter measurement module includes a Doppler current profiler and a wave meter, and the wave and current characteristic data include water flow velocity, wave height and wave period.

[0047] Specifically, the first force gauge 8 and the second force gauge 6 mainly measure the force and bending moment. Optical fiber strain sensors 12 and optical fiber acceleration sensors 11 are arranged outside the drilling riser model and the surface conduit model 2 to measure the acceleration and strain of each measuring point of the pipe section. Specifically, in this embodiment, four groups of measuring points can be arranged at 0 o'clock, 3 o'clock, 6 o'clock and 9 o'clock directions of the pipe section, the optical fiber acceleration sensor 11 is arranged at 9 o'clock, and the optical fiber strain sensor 12 is arranged in the other three directions. Optical fiber sensors, especially optical fiber sensors on the wellhead and conduit in the soil, must be well protected. The control and analysis module can be equipped with an optical fiber demodulator and a data processing computer.

[0048] In the experiment process, the present embodiment can mainly change the water flow velocity, wave height and period, the movement amplitude and period of the top of the pipe section, and collect and record the force data of the top and bottom of the deep-water drilling pipe model 5 through the force gauge. In the present embodiment, the force response data such as the acceleration and strain time history data of the pipe body distributed along the pipe section and the wellhead can be measured by the optical fiber sensor.

[0049] The deepwater drilling pipe model 5 adopted in this embodiment can realize similarity simulation of the riser principle and satisfy the gravity similarity theory, so that the test model and the test prototype have strong similarity.

[0050] The force gauge used in this embodiment can measure the tension at the top of the cut-off riser and the bottom of the underwater wellhead, as well as the drag force of the pipeline under the action of the ocean current. The optical fiber acceleration and optical fiber strain measurement used in this embodiment can collect the vibration acceleration and strain change characteristics of the underwater wellhead-rise pipe section, and can realize the fatigue damage monitoring and evaluation of the underwater wellhead, thereby providing important guidance for the fatigue damage mechanism and safe application of the underwater wellhead system.

[0051] The deep-water drilling pipe fatigue monitoring test device proposed in this embodiment can test the force data and force response data of the deep-water drilling pipe model 5 under the action of wave-current coupling and the top reciprocating motion, evaluate the fatigue monitoring damage of the deep-water drilling pipe model 5 based on the force data and force response data, and then evaluate the fatigue monitoring damage of the deep-water drilling riser and the underwater wellhead system catheter section, thereby providing an effective fatigue monitoring test method for the deep-water drilling riser and the underwater wellhead system catheter section.

[0052] like Figure 3 As shown, this embodiment provides a deep-water drilling pipe fatigue monitoring test method, which is applied to Figure 1 The control and analysis module is connected to the sliding module, the wave flow generating module, the first force measuring instrument, the second force measuring instrument and the optical fiber sensor. The method may include the following steps: S301. The control analysis module performs a dynamic response test on a deep-water drilling pipe model by controlling the operating states of the wave flow generation module and the sliding module.

[0053] Optionally, step S301 may include: The control and analysis module applies wave-current coupling to the deep-water drilling pipe model by controlling the wave-current generating module to generate waves and currents in an open water pool, and drives the deep-water drilling pipe model to move by controlling the sliding module to perform reciprocating motion in the horizontal direction, so as to conduct a dynamic response test on the deep-water drilling pipe model.

[0054] Specifically, the wave and current generating module can exert force on the water in the open water pool to generate waves and currents in the open water pool.

[0055] Specifically, the sliding module may include a reciprocating slide rail and a motor. The reciprocating slide rail can perform horizontal reciprocating motion under the action of the motor, driving the deep-water drilling pipe model to move from the top of the deep-water drilling pipe model, simulating the top offset of the deep-water drilling riser and the underwater wellhead conduit.

[0056] S302: The control analysis module measures the force data of the deepwater drilling pipe model through the first dynamometer and the second dynamometer.

[0057] Specifically, the first dynamometer and the second dynamometer mainly measure force and bending moment.

[0058] S303, the control and analysis module collects the force response data of the deep-water drilling pipe model through the optical fiber sensor.

[0059] Specifically, optical fiber strain sensors and optical fiber acceleration sensors are arranged outside the drilling riser model and the surface conduit model to measure the acceleration and strain of each measuring point of the pipe section. Specifically, in this embodiment, four groups of measuring points can be arranged at 0 o'clock, 3 o'clock, 6 o'clock and 9 o'clock directions of the pipe section, optical fiber acceleration sensors are arranged at 9 o'clock, and optical fiber strain sensors are arranged in the other 3 directions. Optical fiber sensors, especially optical fiber sensors on the wellhead and conduit in the soil, must be well protected. The control and analysis module can be equipped with an optical fiber demodulator and a data processing computer.

[0060] S304: The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data.

[0061] Optionally, the device further includes an environmental parameter measurement module; the environmental parameter measurement module is disposed in an open water pool and is connected to the control analysis module through communication. In this case, step S304 specifically includes: The control and analysis module collects wave and current characteristic data in the open water pool through the environmental parameter measurement module; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model based on the force data, force response data and wave and current characteristic data.

[0062] Optionally, the environmental parameter measurement module includes a Doppler current profiler and a wave meter, and the wave and current characteristic data include water flow velocity, wave height and wave period.

[0063] Specifically, this embodiment can design a scaled experimental model of the deepwater riser-underwater wellhead system conduit section based on similarity theory (similar principles such as geometry, Froude number or Reynolds number), perform truncation design according to the depth of the experimental water pool, and manufacture a deepwater drilling pipe model that meets the scaled requirements such as stiffness, wet weight and outer diameter, so as to complete the design of a deepwater underwater wellhead system fatigue monitoring tank experiment under wave-current coupling and top reciprocating motion.

[0064] Specifically, this embodiment can test the local stress load characteristics of the deepwater drilling pipe model under the action of wave-current coupling and top reciprocating motion, and use the deepwater drilling pipe model monitoring data to evaluate the fatigue monitoring damage of the deepwater drilling riser and underwater wellhead.

[0065] It should be noted that when conducting underwater wellhead-drilling riser experiments in the ocean, relevant technologies often scale down and truncate the experimental model based on similarity theory (geometry, Froude number or Reynolds number and other similarity principles) to adapt to the depth of the experimental pool. However, in this experiment, the application depth of the underwater wellhead drilling riser is generally over 1000m. Even after scaling down at a ratio of 1:50, the pool depth still needs to exceed 20m, which is too high. In this experiment, the wellhead system fatigue monitoring pool experiment is mainly for regularity research, and the experiment can be carried out without strict scaling according to the prototype, and a truncated scaling experiment can be used.

[0066] Specifically, this embodiment can carry out deepwater underwater wellhead system fatigue monitoring tank experiments under different wave and current coupling effects and top reciprocating motion with different amplitude periods, so as to realize the subsequent study on the variation law of deepwater underwater wellhead fatigue damage. By using the underwater wellhead system fatigue damage tank experiment data processing method and using the deepwater riser-underwater wellhead system guide tube section monitoring data analysis to calculate the wellhead fatigue damage, a comparative study is carried out with the wellhead fatigue damage results predicted based on environmental data such as wave and current, and the variation law of deepwater underwater wellhead fatigue damage under different influencing factors such as current, wave, and top reciprocating motion is studied.

[0067] In the experiment process, the present embodiment can mainly change the water flow velocity, wave height and period, the movement amplitude and period of the top of the pipe section, and collect and record the force data of the top and bottom of the deepwater drilling pipe model through the force gauge. In the present embodiment, the force response data such as the acceleration and strain time history data of the pipe body distributed along the pipe section and the wellhead can be measured by the optical fiber sensor.

[0068] The deepwater drilling pipe model adopted in this embodiment can realize similarity simulation of the riser principle and satisfy the gravity similarity theory, so that the test model and the test prototype have strong similarity.

[0069] The force gauge used in this embodiment can measure the tension at the top of the cut-off riser and the bottom of the underwater wellhead, as well as the drag force of the pipeline under the action of the ocean current. The optical fiber acceleration and optical fiber strain measurement used in this embodiment can collect the vibration acceleration and strain change characteristics of the underwater wellhead-rise pipe section, and can realize the fatigue damage monitoring and evaluation of the underwater wellhead, thereby providing important guidance for the fatigue damage mechanism and safe application of the underwater wellhead system.

[0070] The deepwater drilling pipe fatigue monitoring test method proposed in this embodiment can test the force data and force response data of the deepwater drilling pipe model under the action of wave-current coupling and the top reciprocating motion, and evaluate the fatigue monitoring damage of the deepwater drilling pipe model based on the force data and force response data, and then evaluate the fatigue monitoring damage of the deepwater drilling riser and the underwater wellhead system catheter section, thereby providing an effective fatigue monitoring test method for the deepwater drilling riser and the underwater wellhead system catheter section.

[0071] like Figure 4 As shown, this embodiment proposes a control analysis module, which may include: The test unit 401 is used to perform a dynamic response test on a deep-water drilling pipe model by controlling the operating states of the wave-current generating module and the sliding module; The measuring unit 402 is used to measure the force data of the deepwater drilling pipe model by using a first force measuring instrument and a second force measuring instrument; The acquisition unit 403 is used to acquire the force response data of the deep-water drilling pipe model through the optical fiber sensor; The monitoring unit 404 is used to perform fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data.

[0072] It should be noted that the processing of the test unit 401, the measurement unit 402, the collection unit 403 and the monitoring unit 404 and the beneficial effects thereof can be referred to in Figure 3 Steps S301 to S304 in the above are not described in detail.

[0073] Optionally, the above-mentioned device also includes an environmental parameter measurement module; the environmental parameter measurement module is arranged in an open water tank and is communicatively connected to the control and analysis module.

[0074] The monitoring unit 404 is also used to: collect wave and current characteristic data in the open water pool through the environmental parameter measurement module; and perform fatigue monitoring on the deepwater drilling pipe model according to the force data, force response data and wave and current characteristic data.

[0075] The control and analysis module proposed in this embodiment can test the force data and force response data of the deep-water drilling pipe model under the action of wave-current coupling and the top reciprocating motion, evaluate the fatigue monitoring damage of the deep-water drilling pipe model based on the force data and force response data, and then evaluate the fatigue monitoring damage of the deep-water drilling riser and the underwater wellhead system catheter section, providing an effective fatigue monitoring test method for the deep-water drilling riser and the underwater wellhead system catheter section.

[0076] The control and analysis module in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0077] The embodiment of the present invention also provides a computer device having the above Figure 4 The control analysis module shown.

[0078] See also Figure 5, a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common motherboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides part of the necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 5 A processor 10 is taken as an example.

[0079] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0080] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0081] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function. The data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0082] The memory 20 may include a volatile memory, such as a random access memory. The memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive. The memory 20 may also include a combination of the above-mentioned types of memory.

[0083] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0084] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deepwater drilling pipe fatigue monitoring test device, characterized in that: include: An open soil box, wherein soil of a first preset height is placed; an open water pool, in which water of a second preset height is placed, and is arranged on the top of the open earth box; A wave and current generating module is arranged in the open water pool and is used for generating waves and currents in the open water pool; The sliding module has a top end fixed on the truss and can reciprocate in the horizontal direction; A deepwater drilling pipe model, a first dynamometer and a second dynamometer; the deepwater drilling pipe model passes through the bottom of the open water pool in the vertical direction and is inserted into the soil of the open soil box, the bottom end of which is rigidly connected to the bottom of the open soil box through the first dynamometer, the top end is located above the water surface of the open water pool, and the top end is rigidly connected to the bottom end of the sliding module through the second dynamometer, and moves under the drive of the sliding module; the first dynamometer and the second dynamometer are used to measure the force data of the deepwater drilling pipe model; An optical fiber sensor is arranged on the outer surface of the deep-water drilling pipe model and is used to collect force response data of the deep-water drilling pipe model; a control and analysis module, connected to the sliding module, the wave and current generating module, the first dynamometer, the second dynamometer and the optical fiber sensor, for performing a dynamic response test on the deep-water drilling pipe model by controlling the operating states of the sliding module and the wave and current generating module, and performing fatigue monitoring on the deep-water drilling pipe model according to the force data measured by the first dynamometer and the second dynamometer and the force response data collected by the optical fiber sensor.

2. The device according to claim 1, characterized in that The deepwater drilling pipe model is obtained by truncation and reduction simulation of the deepwater drilling riser and the underwater wellhead conduit.

3. The device according to claim 2, characterized in that The deepwater drilling pipe model includes a drilling riser model, a lower flexible joint model, a blowout preventer model, an underwater wellhead model and a surface pipe model which are rigidly connected in sequence; Wherein, the top of the drilling riser model is located above the water surface of the open water pool, and the top of the drilling riser model is rigidly connected to the bottom end of the sliding module through the second dynamometer; The lower flexible joint model and the blowout preventer model are located in the open water pool; The underwater wellhead model penetrates the bottom of the open water pool and is inserted into the soil of the open soil box; The bottom end of the surface conduit model is rigidly connected to the bottom of the open soil box through the first dynamometer.

4. The device according to claim 3, characterized in that The drilling riser model is a non-homogeneous multi-layer cylindrical tube structure composed of three layers of materials, which are lead rods, aluminum tubes, and high-density polyethylene tubes from the inside to the outside.

5. The device according to claim 1, characterized in that The first force measuring instrument and the second force measuring instrument are six-component force measuring instruments, and the optical fiber sensor includes an optical fiber acceleration sensor and an optical fiber strain sensor.

6. The device according to claim 1, characterized in that The device also includes: An environmental parameter measurement module, disposed in the open water pool, communicatively connected to the control and analysis module, and used for measuring wave and current characteristic data in the open water pool; The control and analysis module is also used to perform fatigue monitoring on the deep-water drilling pipe model based on the force data measured by the first force meter and the second force meter and the force response data collected by the optical fiber sensor, as well as the wave and current characteristic data measured by the environmental parameter measurement module.

7. The device according to claim 6, characterized in that The environmental parameter measurement module includes a Doppler current profiler and a wave meter, and the wave and current characteristic data includes water flow velocity, wave height and wave period.

8. A deepwater drilling pipe fatigue monitoring test method, characterized in that: The device applied to any one of claims 1 to 7, wherein the control analysis module is connected to the sliding module, the wave flow generating module, the first force measuring instrument, the second force measuring instrument and the optical fiber sensor; the method comprises: The control and analysis module performs a dynamic response test on the deep-water drilling pipe model by controlling the operating states of the wave and current generating module and the sliding module; The control and analysis module measures the force data of the deepwater drilling pipe model through the first force gauge and the second force gauge, and collects the force response data of the deepwater drilling pipe model through the optical fiber sensor; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data.

9. The method according to claim 8, characterized in that The control and analysis module performs a dynamic response test on the deepwater drilling pipe model by controlling the operating states of the wave flow generating module and the sliding module, including: The control and analysis module applies wave-current coupling to the deep-water drilling pipe model by controlling the wave-current generating module to generate waves and currents in an open water pool, and drives the deep-water drilling pipe model to move by controlling the sliding module to perform reciprocating motion in the horizontal direction, so as to perform a dynamic response test on the deep-water drilling pipe model.

10. The method according to claim 8, characterized in that The device further comprises an environmental parameter measurement module; the environmental parameter measurement module is arranged in the open water pool and is communicatively connected to the control and analysis module; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data and the force response data, including: The control and analysis module collects wave and current characteristic data in the open water pool through the environmental parameter measurement module; The control and analysis module performs fatigue monitoring on the deepwater drilling pipe model according to the force data, the force response data and the wave and current characteristic data.

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