Longitudinal-torsional vibration response characteristic test board for electric drilling tool of submarine drilling machine

Abstract

The invention discloses a longitudinal-torsional vibration response characteristic test board for an electric drilling tool of a submarine drilling machine, and relates to the technical field of drilling tool testing. A shaft is vertically connected to a vertical supporting frame assembly, and the electric drilling tool is arranged in the shaft; the seabed simulation cylinder is arranged at the bottom end of the shaft, and the drilling end of the electric drilling tool can extend into the seabed simulation cylinder; the slurry circulation assembly is connected to the shaft and the electric drilling tool and simulates the slurry circulation process between the electric drilling tool and the shaft. The driving mechanism is arranged on the vertical supporting frame assembly and connected with the top of the electric drilling tool so as to vertically drive the electric drilling tool to simulate the drilling pressure of the electric drilling tool; the monitoring assembly can monitor working parameters of the electric drilling tool, and the monitoring assembly is further in communication connection with the slurry circulation assembly, the driving mechanism and the electric drilling tool and can conduct control. The longitudinal-torsional vibration response characteristic test board for the electric drilling tool of the seabed drilling machine can meet the longitudinal-torsional vibration test requirements of the electric drilling tool of the seabed drilling machine.

Description

Technical Field

[0001] This invention relates to the field of drilling tool testing technology, and in particular to a test bench for the longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs. Background Technology

[0002] In deep-sea shallow natural gas hydrate engineering subsea drilling rig projects, electric drilling tools play a crucial role as the core equipment for oil and gas extraction. However, mechanical vibration is a key factor directly affecting the operating performance, control accuracy, stability, and service life of electric drilling tools. Longitudinal vibration can easily cause drill bit bouncing, leading to drill bit cutting tooth breakage and drill string fracture, while torsional vibration can easily cause drill string torsion breakage and drill bit tooth breakage. Therefore, rigorous testing is required before electric drilling tools are put into operation, but currently there are no longitudinal-torsional vibration testing tools for electric drilling tools used in subsea natural gas hydrate drilling operations. Summary of the Invention

[0003] The purpose of this invention is to provide a test bench for the longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs, so as to solve the problems existing in the prior art and meet the requirements for longitudinal-torsional vibration testing of electric drilling tools for subsea drilling rigs.

[0004] To achieve the above objectives, the present invention provides the following solution: This invention provides a test bench for the longitudinal-torsional vibration response characteristics of an electric drilling tool for a subsea drilling rig, comprising a vertical support frame assembly, a wellbore, a subsea simulation cylinder, a mud circulation assembly, a drive mechanism, and a monitoring assembly. The wellbore is vertically connected to the vertical support frame assembly, and an electric drilling tool is disposed within the wellbore. The subsea simulation cylinder is disposed at the bottom end of the wellbore, and the drilling end of the electric drilling tool can extend into the subsea simulation cylinder. The mud circulation assembly is connected to the wellbore and the electric drilling tool to simulate the mud circulation process between the electric drilling tool and the wellbore. The drive mechanism is disposed on the vertical support frame assembly and connected to the top of the electric drilling tool to vertically drive the electric drilling tool. The monitoring assembly can monitor the operating parameters of the electric drilling tool, and the monitoring assembly is also communicatively connected to the drive mechanism and the electric drilling tool, and can perform control functions.

[0005] Preferably, the drive mechanism includes a hydraulic device and a connecting assembly. The hydraulic device is connected to the top of the vertical support frame assembly, and the hydraulic device is connected to the top of the electric drill bit through the connecting assembly. The connecting assembly is capable of monitoring and buffering the stress between the hydraulic device and the electric drill bit.

[0006] Preferably, the connecting assembly includes a tension monitoring component, a connecting rod, and a traction seat arranged sequentially from top to bottom. The upper end of the tension monitoring component is fixed relative to the hydraulic device, the lower end of the tension monitoring component is fixedly connected to the upper end of the connecting rod, the lower end of the connecting rod is rotatably connected to the traction seat and can rotate relative to it around a horizontal axis, and the traction seat is fixed relative to the electric drill bit. The tension monitoring component is used to monitor the stress information between the hydraulic device and the electric drill bit and can transmit it to the monitoring assembly.

[0007] Preferably, the mud circulation assembly includes an injection line, a return line, and a mud pump; both the injection line and the return line are connected to the mud pump, and the injection end of the injection line is connected to the electric drilling tool, and the return end of the return line is connected to the top of the wellbore.

[0008] Preferably, the monitoring component includes a monitoring component and a central control component. The monitoring component includes a pressure monitoring element, a vibration monitoring element, a displacement monitoring element, and a speed and torque monitoring element. The pressure monitoring element is disposed at the bottom of the rock inside the seabed simulation cylinder and is used to monitor drilling pressure information. The vibration monitoring element and the displacement monitoring element are both disposed on the electric drilling tool and can respectively monitor the vibration information and displacement information of the electric drilling tool. The speed and torque monitoring element is disposed at the drilling end of the electric drilling tool and is used to monitor speed and torque information. The central control component is communicatively connected to the monitoring component and can receive corresponding monitoring information. The central control component is also communicatively connected to the drive mechanism and the electric drilling tool and can perform control.

[0009] Preferably, the vertical support frame assembly includes a base frame, several vertical frames, and several main diagonal braces; the base frame is fixedly disposed on a fixed surface and surrounds the periphery of the seabed simulation cylinder; the several vertical frames are distributed around the cylinder and clamp the cylinder; the several main diagonal braces are distributed around the cylinder, the upper end of each main diagonal brace is inclined in the direction close to the cylinder, and the upper end of each main diagonal brace is connected to the vertical frame, and the lower end is connected to the base frame.

[0010] Preferably, the vertical frames are connected by a plurality of vertically distributed connecting clamps; and a plurality of vertically distributed clamping clamps are provided between the vertical frames and the well shaft, each clamping clamp being able to clamp onto the outer periphery of the well shaft, and each clamping clamp having a buffer pad on its side for clamping the well shaft; each clamping clamp being able to slide vertically connected to the vertical frame.

[0011] Preferably, the upper end of each of the main diagonal braces is connected to the upper part of the vertical frame, and the bottom end of each of the vertical frames is connected to the adjacent main diagonal brace through a first crossbeam.

[0012] Preferably, the vertical support frame assembly further includes several secondary diagonal braces distributed around the well shaft, and the main diagonal braces and the secondary diagonal braces are arranged sequentially around the well shaft; a second crossbeam is fixedly connected between the sides of adjacent first crossbeams, the upper end of each secondary diagonal brace is inclined in the direction close to the well shaft, and the upper end of each main diagonal brace is connected to the corresponding second crossbeam, and the lower end is connected to the base frame.

[0013] Preferably, the main inclined support frame and the secondary inclined support frame are connected to the base frame by a plurality of first connecting plates and a plurality of second connecting plates; the first connecting plates are attached to and fixed to the side of the main inclined support frame or the side of the secondary inclined support frame, and the second connecting plates are attached to and fixed to the surface of the base frame. The sides of the first connecting plates and the second connecting plates that are close to each other can be spliced ​​and fixed, and the second connecting plates can limit the first connecting plates in the direction away from the well shaft.

[0014] The present invention achieves the following technical effects compared to the prior art: The longitudinal-torsional vibration response characteristic test bench for subsea drilling rigs provided by this invention is vertically supported by a vertical support frame assembly to simulate the vertical working state of the electric drilling tool. Through the coordinated operation of the electric drilling tool, wellbore, subsea simulation cylinder, and mud circulation assembly, as well as the drive mechanism, vertical drive is achieved. This can construct a longitudinal-torsional vibration test environment that fits the deep-sea operation scenario. The monitoring component is used to monitor and control the working parameters in real time, so as to achieve accurate testing of the longitudinal-torsional vibration of the electric drilling tool. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view schematic diagram of the test bench for longitudinal-torsional vibration response characteristics of the electric drilling tool of the subsea drilling rig provided in Embodiment 1 of the present invention; Figure 2 for Figure 1 A side view diagram; Figure 3 This is a schematic diagram showing the distribution of the monitoring components provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram showing the distribution of the pressure monitoring components provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the connection component provided in Embodiment 1 of the present invention; Figure 6This is a schematic diagram of the connecting rod provided in Embodiment 1 of the present invention; Figure 7 A schematic diagram of the traction seat provided in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram showing the positions of the injection pipeline and return pipeline provided in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the clamping hoop provided in Embodiment 1 of the present invention; Figure 10 This is a partial schematic diagram of the cooperation between the main diagonal brace, the vertical frame, and the first crossbeam provided in Embodiment 1 of the present invention; Figure 11 for Figure 10 Enlarged view of point A in the middle; Figure 12 This is a schematic diagram of the secondary diagonal bracing provided in Embodiment 1 of the present invention; Figure 13 Figure 12 Enlarged view of point B in the middle; Figure 14 This is a schematic diagram of the base frame; Figure 15 This is a partial schematic diagram of the installation of the first connecting plate and the second connecting plate provided in Embodiment 1 of the present invention; Figure 16 This is a schematic diagram of the first connecting plate provided in Embodiment 1 of the present invention; Figure 17 This is a schematic diagram of the second connecting plate provided in Embodiment 1 of the present invention; Figure 18 This is a half-schematic diagram of the connecting clamp provided in Embodiment 1 of the present invention.

[0017] In the diagram: 1-Vertical support frame assembly; 11-Base frame; 12-Vertical frame; 13-Main diagonal brace; 14-Connecting clamp; 15-Clamping clamp; 151-Buffer pad; 152-Clamping clamp; 153-Slider; 16-First crossbeam; 17-Secondary diagonal brace; 18-Second crossbeam; 19-First connecting plate; 20-Second connecting plate; 2-Wellbore; 3-Electric drilling tool; 31-Upper motor head; 32-Drill bit; 4-Seabed simulation cylinder; 4 1-Rock; 5-Mud circulation assembly; 51-Injection pipeline; 52-Return pipeline; 53-Mud pump; 6-Drive mechanism; 61-Hydraulic device; 62-Connecting assembly; 63-Tension monitoring component; 64-Connecting rod; 65-Traction seat; 66-Connecting disc; 7-Monitoring assembly; 71-Monitoring component; 72-Central control assembly; 73-Pressure monitoring component; 74-Vibration monitoring component; 75-Displacement monitoring component; 76-Speed ​​and torque monitoring component. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide a test bench for the longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs, so as to solve the problems existing in the prior art and meet the requirements for longitudinal-torsional vibration testing of electric drilling tools for subsea drilling rigs.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 This embodiment provides a test bench for the longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs. Please refer to [link / reference]. Figures 1-18 The system includes a vertical support frame assembly 1, a wellbore 2, a subsea simulation cylinder 4, a mud circulation assembly 5, a drive mechanism 6, and a monitoring assembly 7. The wellbore 2 is vertically connected to the vertical support frame assembly 1, and an electric drilling tool 3 is installed inside the wellbore 2. The subsea simulation cylinder 4 is located at the bottom of the wellbore 2, and the drilling end of the electric drilling tool 3 can extend into the subsea simulation cylinder 4. The mud circulation assembly 5 is connected to the wellbore 2 and the electric drilling tool 3 to simulate the mud circulation process between the electric drilling tool 3 and the wellbore 2. The drive mechanism 6 is located on the vertical support frame assembly 1 and connected to the top of the electric drilling tool 3 to enable vertical drive of the electric drilling tool 3. The monitoring assembly 7 can monitor the working parameters of the electric drilling tool 3, and the monitoring assembly 7 is also communicatively connected to the drive mechanism 6 and the electric drilling tool 3, and can perform control.

[0022] The entire system is vertically supported by a vertical support frame assembly 1 to simulate the vertical working state of the electric drilling tool 3. The electric drilling tool 3, wellbore 2, seabed simulation cylinder 4, and mud circulation assembly 5 work together, and the drive mechanism 6 drives the system vertically. This creates a longitudinal-torsional vibration test environment that fits the deep-sea operation scenario. The monitoring assembly 7 monitors and controls the working parameters in real time to achieve accurate longitudinal-torsional vibration testing of the electric drilling tool 6. Specifically, the seabed simulation cylinder 4 contains rocks 41 and mud. The rocks 41 are model hydrate formations, and the mud simulates normal seabed formations. The drill bit 32 of the electric drilling tool 3 is used to simulate drilling.

[0023] In the optional embodiments of this example, more preferably, the drive mechanism 6 includes a hydraulic device 61 and a connecting component 62. The hydraulic device 61 is connected to the top of the vertical support frame assembly 1, and the hydraulic device 61 is connected to the top of the electric drill 3 through the connecting component 62. The connecting component 62 can monitor and buffer the stress between the hydraulic device 61 and the electric drill 3.

[0024] The system uses a hydraulic device 61, such as a hydraulic cylinder, to vertically drive the electric drill 3 to simulate the drilling pressure application process. The system is connected by a connecting component 62 to achieve monitoring and buffering. It can detect the hook load, i.e. the tension between the hydraulic device 61 and the electric drill 3, in the simulated subsea drilling operation in real time, and buffer the load to prevent structural damage to the lower components due to vibration response overload during vibration testing.

[0025] More preferably, the connecting assembly 62 includes a tension monitoring component 63, a connecting rod 64, and a traction seat 65 arranged sequentially from top to bottom. The upper end of the tension monitoring component 63 is fixed relative to the hydraulic device 61, the lower end of the tension monitoring component 63 is fixedly connected to the upper end of the connecting rod 64, the lower end of the connecting rod 64 is rotatably connected to the traction seat 65 and can rotate relative to it around a horizontal axis, and the traction seat 65 is fixed relative to the electric drill 3. The tension monitoring component 63 is used to monitor the stress information between the hydraulic device 61 and the electric drill 3 and can transmit it to the monitoring assembly 7.

[0026] Among them, the tension monitoring component 63, such as the tension sensor, is fixedly connected to the hydraulic device 61 at the upper part via the connecting plate 66, and threadedly connected to the connecting rod 64 at the lower part, and is used to detect the hook load during the drilling operation of the subsea drilling rig in real time; the lower end of the connecting rod 64 adopts a rounded rectangular structure design, which can buffer the vibration response and avoid the rigid connection from breaking; the connecting rod 64 is hinged to the traction seat 65 via the connecting shaft, and the connecting rod 64 is provided with an oblong hole in the middle so that the connecting shaft can pass through. The two together with the connecting shaft form a flexible connection component to buffer the vibration impact; the lower part of the traction seat 65 is connected to the upper motor head 31 of the electric drill 3 via the connecting plate 66 and the connecting bolt. With the above-mentioned flexible connection component, it can prevent the lower component from being damaged due to vibration response overload during vibration testing; compared with rigid connection, this embodiment significantly improves the structural protection capability of the testing device through the synergistic effect of "load monitoring-vibration buffering-impact absorption", ensuring stable operation during the testing process.

[0027] In the optional embodiments of this example, more preferably, the mud circulation assembly 5 includes an injection line 51, a return line 52, and a mud pump 53; both the injection line 51 and the return line 52 are connected to the mud pump 53, and the injection end of the injection line 51 is connected to the electric drilling tool 3, and the return end of the return line 52 is connected to the top of the wellbore 2.

[0028] The wellbore 2 is fixedly connected to the upper motor head 31 at the top of the electric drilling tool 3. The injection line 51 is connected to the upper motor head 31 of the electric drilling tool 3, and the return line 52 is connected to the top of the wellbore 2. The injection line 51 injects into the hollow shaft of the electric drilling tool 3. During rock breaking operations, the mud flows from the bottom of the shaft to the annulus between the electric drilling tool 3 and the wellbore 2, and returns to the mud pump 53 through the return line 52 via the outlet at the top of the wellbore 2, completely replicating the mud circulation process of real subsea drilling. It can accurately reproduce the mud environment of the electric drilling tool 3 in actual service, ensuring that the vibration response test results have more engineering reference value.

[0029] In the optional embodiments of this example, more preferably, the monitoring component 7 includes a monitoring component 71 and a central control component 72. The monitoring component 71 includes a pressure monitoring element 73, a vibration monitoring element 74, a displacement monitoring element 75, and a speed and torque monitoring element 76. The pressure monitoring element 73 is located at the bottom of the rock 41 inside the seabed simulation cylinder 4 and is used to monitor drilling pressure information. The vibration monitoring element 74 and the displacement monitoring element 75 are both located on the electric drilling tool 3 and can monitor the vibration information and displacement information of the electric drilling tool 3, respectively. The speed and torque monitoring element 76 is located at the drilling end of the electric drilling tool 3 and is used to monitor speed and torque information. The central control component 72 is communicatively connected to the monitoring component 71 and can receive corresponding monitoring information. The central control component 72 is also communicatively connected to the drive mechanism 6 and the electric drilling tool 3 and can perform control.

[0030] The pressure monitoring component 73 includes four pressure sensors deployed at the four corners of the bottom of the rock 41 to detect drilling pressure data in real time during the drilling operation of the subsea drilling rig. The vibration monitoring component 74 includes several vibration sensors, and the displacement monitoring component 75 includes several displacement sensors. The vibration and displacement sensors are distributed along the axial direction of the electric drill 3 at different positions of the electric drill 3 and on the outer surface of the drill string connection device to realize real-time acquisition of vibration response and displacement during the drilling operation of the electric drill 3. The speed and torque monitoring component 76 is a speed and torque sensor installed at the shaft position on the upper part of the drill bit 32 to detect the speed and torque parameters of the electric drill 3 in real time during the drilling operation. The central control component 72 is a computer terminal or control cabinet. The monitoring data of the monitoring component 71 and the tension monitoring component 63 are transmitted to the central control component 72 through a transmission line or wirelessly for data integration, processing and storage, providing accurate data support for drilling operation simulation testing. The central control component 72 can control the movement of the drive mechanism 6 and the electric drill 3 to realize longitudinal-torsional vibration testing of the electric drill string of the subsea drilling rig.

[0031] In the optional embodiments of this example, more preferably, the vertical support frame assembly 1 includes a base frame 11, a plurality of vertical frames 12 and a plurality of main diagonal braces 13; the base frame 11 is fixedly mounted on a fixed surface and surrounds the periphery of the seabed simulation cylinder 4; the plurality of vertical frames 12 are distributed around the periphery of the well cylinder 2 and clamp the well cylinder 2; the plurality of main diagonal braces 13 are distributed around the periphery of the well cylinder 2, the upper end of each main diagonal brace 13 is inclined in the direction close to the well cylinder 2, and the upper end of each main diagonal brace 13 is connected to the vertical frame 12, and the lower end is connected to the base frame 11.

[0032] The system consists of a vertical frame 12, a main diagonal brace 13, and a base frame 11, which work together to form a stable triangular support and ensure the stability of the support. There are two vertical frames 12 and two main diagonal braces 13, which are symmetrically arranged on both sides.

[0033] More preferably, the vertical frames 12 are connected by a number of vertically distributed connecting clamps 14; and a number of vertically distributed clamping clamps 15 are provided between the vertical frames 12 and the well shaft 2, each clamping clamp 15 can be clamped to the outer periphery of the well shaft 2, and each clamping clamp 15 has a buffer pad 151 on its side for clamping the well shaft 2; each clamping clamp 15 can be vertically slidably connected to the vertical frame 12.

[0034] Each connecting clamp 14 is symmetrically arranged in pairs, located on both sides of the well shaft 2, for stabilizing the two vertical frames 12. Designed as a plate structure, it has two through holes at each end for assembly. The rounded transition section connecting the end mounting parts to the central main body uses a smooth curved surface design to disperse stress. The bottom edge of the long strip-shaped base in the center of the structure adopts an arc transition design. The overall structure is a rigid, integrally formed component. Each clamping clamp 15 consists of symmetrically arranged clamps 152, sliders 153, buffer pads 151, and connecting bolts, used to clamp the well shaft 2. The buffer pads 151 are made of rubber and are positioned at the contact interface between the clamps 152 and the well shaft 2. Their function is to buffer the clamping force applied by the clamps 152 to the well shaft 2, preventing structural damage to the well shaft 2 due to the rigid constraint of the clamps 152. The sliders 153 are embedded in the gaps between the two side wing plates of the vertical frame 12 to bear and buffer the longitudinal impact load generated under vibration conditions, improving the structure's vibration resistance.

[0035] Furthermore, the vertical frame 12 adopts a combination configuration of "middle web plate + two side wing plates" for vertical load support. At the same time, the gap area formed between the two side wing plates is adapted to the sliding stroke of the slider 153 in the clamping hoop 15, providing guiding space for the slider 153.

[0036] More preferably, the upper end of each main diagonal brace 13 is connected to the upper middle part of the vertical frame 12, and the bottom end of each vertical frame 12 is connected to the adjacent main diagonal brace 13 through the first crossbeam 16.

[0037] In order to further improve the stability between the main diagonal brace 13 and the vertical frame 12, the first crossbeam 16 is used to reinforce the stability of the two vertical frames 12. One end of each first crossbeam 16 is connected to the vertical frame 12 by bolts, and the other end is connected to the main diagonal brace 13.

[0038] More preferably, the vertical support frame assembly 1 further includes several secondary diagonal braces 17 distributed around the well shaft 2, and the main diagonal braces 13 and the secondary diagonal braces 17 are arranged sequentially around the well shaft 2; a second crossbeam 18 is fixedly connected between the sides of adjacent first crossbeams 16, the upper end of each secondary diagonal brace 17 is inclined in the direction close to the well shaft 2, and the upper end of each main diagonal brace 13 is connected to the corresponding second crossbeam 18, and the lower end is connected to the base frame 11.

[0039] Two secondary inclined supports 17 are also provided, symmetrically arranged on both sides of the shaft 2, forming a cross with the two main inclined supports 13 in a top view; the secondary inclined supports 17 are rigidly connected to the second crossbeam 18 by bolted connectors, thereby constructing an auxiliary stability constraint in the lower area of ​​the vertical frame 12, further enhancing the overall anti-overturning and anti-deformation capabilities; that is, the first crossbeam 16, the main inclined supports 13 and the second crossbeam 18 form a triangular stable structure, improving the overall anti-instability performance.

[0040] More preferably, the main inclined support frame 13 and the secondary inclined support frame 17 are connected to the base frame 11 by a number of first connecting plates 19 and a number of second connecting plates 20; the first connecting plates 19 are attached to the side of the main inclined support frame 13 or the side of the secondary inclined support frame 17, and the second connecting plates 20 are attached to the surface of the base frame 11. The sides of the first connecting plates 19 and the second connecting plates 20 that are close to each other can be spliced ​​and fixed, and the second connecting plates 20 can limit the first connecting plates 19 in the direction away from the well shaft 2.

[0041] The first connecting plate 19 adopts an angled structural design to accommodate the installation angles of the main diagonal brace 13 and the secondary diagonal brace 17. The second connecting plate 20 is bolted to the base frame 11, and one end adopts a notch-cut configuration. The size of the notch complements the protruding part at one end of the first connecting plate 19. The two achieve precise splicing through surface matching. The notch of the second connecting plate 20 protrudes closer to the well shaft 2 than the protrusion of the first connecting plate 19, so that the second connecting plate 20 can limit the outward sliding of the first connecting plate 19. This connection method can ensure the connection accuracy and rigidity between the main diagonal brace 13 and the secondary diagonal brace 17 and the base frame 11, effectively improving the overall deformation resistance and instability resistance of the structure. Furthermore, both the main diagonal brace 13 and the secondary diagonal brace 17 adopt a combination configuration of "middle web plate + two side wing plates". Correspondingly, both the main diagonal brace 13 and the secondary diagonal brace 17 are connected to the base frame 11 through two first connecting plates 19 and two second connecting plates 20.

[0042] More preferably, the base frame 11 has a rectangular frame configuration. Stiffener assemblies are provided at the four corners of the base frame 11 and at the middle of each frame beam. Each stiffener assembly is fixedly connected to the foundation fixing surface by bolts to improve the installation stability and load-bearing reliability of the base frame 11.

[0043] More preferably, in order to facilitate overall assembly and disassembly, the vertical frame 2 and other longer structures can be set into multiple sections as needed, and the sections are spliced ​​and fixed together by bolts.

[0044] Therefore, the vertical support frame assembly 1 provided in this embodiment takes into account both vertical load-bearing and guiding functions. Through multi-structure collaborative design, it significantly improves the ability to resist instability, overturning and deformation, ensuring the reliability of the device structure during the test and guaranteeing stable and accurate test data.

[0045] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A test bench for measuring the longitudinal-torsional vibration response characteristics of an electric drill string of a subsea drilling rig, characterized in that: include: Vertical support frame assembly (1); The well shaft (2) is vertically connected to the vertical support frame assembly (1), and an electric drilling tool (3) is installed inside the well shaft (2). The seabed simulation cylinder (4) is set at the bottom end of the well barrel (2), and the drilling end of the electric drilling tool (3) can extend into the seabed simulation cylinder (4); A mud circulation assembly (5) is connected to the wellbore (2) and the electric drill (3) to simulate the mud circulation process between the electric drill (3) and the wellbore (2); A drive mechanism (6) is disposed on the vertical support frame assembly (1) and connected to the top of the electric drill (3) so as to be able to drive the electric drill (3) vertically; and The monitoring component (7) is capable of monitoring the working parameters of the electric drill (3), and the monitoring component (7) is also communicatively connected to the drive mechanism (6) and the electric drill (3) and is capable of performing control.

2. The test stand of claim 1, wherein: The drive mechanism (6) includes a hydraulic device (61) and a connecting assembly (62). The hydraulic device (61) is connected to the top of the vertical support frame assembly (1). The hydraulic device (61) is connected to the top of the electric drill (3) through the connecting assembly (62). The connecting assembly (62) can monitor and buffer the stress between the hydraulic device (61) and the electric drill (3).

3. The test stand of claim 2, wherein: The connecting assembly (62) includes a tension monitoring component (63), a connecting rod (64), and a traction seat (65) arranged sequentially from top to bottom. The upper end of the tension monitoring component (63) is fixed relative to the hydraulic device (61), and the lower end of the tension monitoring component (63) is fixedly connected to the upper end of the connecting rod (64). The lower end of the connecting rod (64) is rotatably connected to the traction seat (65) and can rotate relative to it around a horizontal axis. The traction seat (65) is fixed relative to the electric drill (3). The tension monitoring component (63) is used to monitor the stress information between the hydraulic device (61) and the electric drill (3) and can transmit it to the monitoring assembly (7).

4. The test bench for longitudinal-torsional vibration response characteristics of the electric drilling tool for subsea drilling rigs according to claim 1, characterized in that: The mud circulation assembly (5) includes an injection line (51), a return line (52), and a mud pump (53); the injection line (51) and the return line (52) are both connected to the mud pump (53), and the injection end of the injection line (51) is connected to the electric drilling tool (3), and the return end of the return line (52) is connected to the top of the wellbore (2).

5. The test bench for longitudinal-torsional vibration response characteristics of the electric drilling tool for subsea drilling rigs according to claim 1, characterized in that: The monitoring component (7) includes a monitoring component (71) and a central control component (72). The monitoring component (71) includes a pressure monitoring component (73), a vibration monitoring component (74), a displacement monitoring component (75), and a speed and torque monitoring component (76). The pressure monitoring component (73) is installed at the bottom of the rock (41) inside the seabed simulation cylinder (4) and is used to monitor drilling pressure information. The vibration monitoring component (74) and the displacement monitoring component (75) are both installed on the electric drill (3) and can monitor the vibration information and displacement information of the electric drill (3) respectively. The speed and torque monitoring component (76) is installed at the drilling end of the electric drill (3) and is used to monitor speed and torque information. The central control component (72) is communicatively connected to the monitoring component (71) and can receive corresponding monitoring information; the central control component (72) is also communicatively connected to the drive mechanism (6) and the electric drill (3) and can perform control.

6. The test bench for longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs according to claim 1, characterized in that: The vertical support frame assembly (1) includes a base frame (11), a plurality of vertical frames (12) and a plurality of main diagonal braces (13); the base frame (11) is fixedly mounted on a fixed surface and surrounds the periphery of the seabed simulation cylinder (4); the plurality of vertical frames (12) are distributed around the periphery of the well cylinder (2) and clamp the well cylinder (2); the plurality of main diagonal braces (13) are distributed around the periphery of the well cylinder (2), the upper end of each main diagonal brace (13) is inclined in the direction close to the well cylinder (2), and the upper end of each main diagonal brace (13) is connected to the vertical frame (12), and the lower end is connected to the base frame (11).

7. The test bench for longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs according to claim 6, characterized in that: The vertical frames (12) are connected by several vertically distributed connecting clamps (14); and several vertically distributed clamping clamps (15) are provided between the vertical frames (12) and the well shaft (2). Each clamping clamp (15) can be clamped to the outer periphery of the well shaft (2), and each clamping clamp (15) is provided with a buffer pad (151) on the side of the well shaft (2) for clamping; each clamping clamp (15) can be vertically slidably connected to the vertical frame (12).

8. The test bench for longitudinal-torsional vibration response characteristics of the electric drilling tool for subsea drilling rigs according to claim 6, characterized in that: The upper end of each of the main diagonal bracing frames (13) is connected to the upper part of the vertical frame (12), and the bottom end of each of the vertical frames (12) is connected to the adjacent main diagonal bracing frame (13) through the first crossbeam (16).

9. The test bench for longitudinal-torsional vibration response characteristics of electric drilling tools for subsea drilling rigs according to claim 8, characterized in that: The vertical support frame assembly (1) also includes several secondary diagonal braces (17) distributed around the well shaft (2), and the main diagonal braces (13) and the secondary diagonal braces (17) are arranged sequentially around the well shaft (2); a second crossbeam (18) is fixedly connected between the sides of adjacent first crossbeams (16), the upper end of each secondary diagonal brace (17) is inclined in the direction close to the well shaft (2), and the upper end of each main diagonal brace (13) is connected to the corresponding second crossbeam (18), and the lower end is connected to the base frame (11).

10. The test bench for longitudinal-torsional vibration response characteristics of the electric drilling tool for subsea drilling rigs according to claim 9, characterized in that: The main inclined support frame (13) and the secondary inclined support frame (17) are connected to the base frame (11) by a number of first connecting plates (19) and a number of second connecting plates (20); the first connecting plate (19) is attached to the side of the main inclined support frame (13) or the side of the secondary inclined support frame (17), and the second connecting plate (20) is attached to the surface of the base frame (11). The sides of the first connecting plate (19) and the second connecting plate (20) that are close to each other can be spliced ​​and fixed, and the second connecting plate (20) can limit the first connecting plate (19) in the direction away from the well shaft (2).

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