Rotary dynamic pressure test detection device and detection method

Abstract

The invention relates to the technical field of rotary blowout preventer detection, in particular to a rotary dynamic pressure test detection device and method. The rotary dynamic pressure test detection device comprises a lifting device, a vertical frame assembly, a base assembly, a cart device, a cart hydraulic cylinder and a rotating device, the lifting device and the rotating device are arranged at the upper end of the vertical frame assembly, and the lower end of the vertical frame assembly is connected with the base assembly through bolts. The base assembly is provided with a cart track, the cart device is located on the track and connected with a cart hydraulic cylinder, the hydraulic cylinder is fixed to a plurality of cart hydraulic cylinder fixing seats, and the fixing seats are evenly distributed in the base assembly. According to the rotary dynamic pressure test detection device, the test drill rod is accurately controlled through the lifting device and the rotating device, the test precision and reliability are improved, the device has the advantages of being practical, safe and easy and convenient to operate, the device is suitable for maintenance, design and research and development of a rotary blowout preventer, the dynamic sealing performance of the rotary blowout preventer can be detected and evaluated, and the practical value is high. Therefore, the reliability and the safety of field application are improved.

Description

Technical Field

[0001] This invention relates to the field of rotating blowout preventer testing technology, and in particular to a rotating dynamic pressure test device and testing method. Background Technology

[0002] Rotary blowout preventers (BOPs) are core equipment for underbalanced drilling and controlled pressure drilling. They enable drilling or tripping under pressure when there is a certain pressure at the wellhead, effectively preventing blowout accidents and ensuring the safety of drilling operations. After each drilling operation, the rotary BOP needs to be maintained and repaired, especially the replacement of the dynamic seal components. The service life of the dynamic seal directly affects the overall performance of the rotary BOP, thus affecting the efficiency and safety of the entire drilling operation.

[0003] Currently, the replacement of dynamic sealing components is usually carried out by manual mechanical tightening. This method has certain limitations and risks. First, manual mechanical tightening is prone to under-tightening or over-tightening. Under-tightening leads to poor sealing performance, failing to achieve the expected sealing effect, thus causing leakage and increasing safety hazards. Conversely, over-tightening increases the relative motion resistance between the rotating assembly and the housing, resulting in increased rotational torque. Under long-term operation, this excessive friction may cause metal filings to accumulate, leading to jamming and preventing the rotary blowout preventer from rotating normally. This seriously affects its service life and the safety of on-site operations. To ensure the performance and reliability of the rotary blowout preventer after maintenance, appropriate testing methods must be used to verify its sealing performance and rotational torque. Summary of the Invention

[0004] (a) Technical problems to be solved This invention provides a rotary dynamic pressure test device and method to overcome the problem that existing technologies lack corresponding testing methods after the maintenance of rotary blowout preventers, which affects the service life of rotary blowout preventers.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides a rotational dynamic pressure testing device, comprising: a lifting device, a frame assembly, a trolley device, a base assembly, a trolley hydraulic cylinder, and a rotating device; The upper end of the upright assembly is provided with a lifting device and a rotating device, and the lower end of the upright assembly is provided with a base assembly. The base assembly is connected to the upright assembly by a number of bolts. The base assembly is provided with a trolley track, the trolley device is located on the trolley track, a trolley hydraulic cylinder is connected to one side of the trolley device, and the trolley hydraulic cylinder is located on several trolley hydraulic cylinder fixing seats. The plurality of trolley hydraulic cylinder fixing seats are evenly arranged in the base assembly.

[0006] Preferably, the lifting device includes: a multi-stage lifting cylinder, a lifting cylinder fixing plate, a piston rod connector, a piston rod connecting flange, and a drill rod connecting protruding key; The lifting cylinder fixing plate is integrated with the multi-stage lifting cylinder. The lifting device is connected to the upright assembly through the lifting cylinder fixing plate. The top of the multi-stage lifting cylinder is provided with a piston rod connector. The top of the piston rod connector is provided with a piston rod connecting flange. The piston rod connecting flange is provided with a drill rod connecting protrusion key. The drill rod universal connecting protrusion key is used to connect the test drill rod.

[0007] Preferably, the rotating device includes: a rotary motor, a motor base, a rotary bearing seat, a rotary output bearing pressure plate, an adjustable pressure-bearing screw, a rotary handle, a rotary flange seat, several flange connecting bolts, a connecting flange, and a universal connecting protrusion key for the drill pipe; The motor base is a rectangular structure with a through hole in the center. A rotary bearing seat is located at the lower end of the motor base. The rotary bearing seat is a hollow cylindrical structure and is connected to the motor base by several bolts.

[0008] Preferably, the upper end of the motor base is provided with a rotary motor, the output shaft of the rotary motor passes through the center of the motor base and the rotary bearing seat in sequence, the lower end of the rotary bearing seat is provided with a rotary output bearing pressure plate, an adjustable pressure screw, a rotary handle and a rotary flange seat in sequence, the lower end of the rotary flange seat is provided with a connecting flange, the connecting flange is connected to the rotary flange seat by a number of flange connecting bolts, and the connecting flange is provided with a drill pipe universal connecting protrusion key.

[0009] Preferably, the trolley device includes: a trolley base, four trolley rollers, a rotating blowout preventer fixing seat, a drill pipe upright cylinder, and several trolley lifting lugs; The trolley base has a rectangular structure, with four trolley rollers evenly distributed at the lower end of the trolley base. The upper end of the trolley base is provided with a rotating blowout preventer fixing seat and a drill rod upright cylinder, and the outer wall of the trolley base is provided with several trolley lifting lugs.

[0010] Preferably, the drill rod upright is used to place the test drill rod, the rotary blowout preventer fixing seat is used to fix the rotary blowout preventer, and the drill rod universal connecting protrusion key is used to connect the test drill rod.

[0011] Preferably, the outer wall of the trolley track is provided with a plurality of trolley roller stops, the trolley roller stops limit the trolley rollers, and the trolley roller stops prevent the trolley rollers from deviating from the trolley track when the trolley track is running.

[0012] Preferably, the inner wall of the trolley hydraulic cylinder fixing seat is provided with a plurality of reinforcing ribs, which prevent the trolley hydraulic cylinder fixing seat from shifting during operation.

[0013] Preferably, it further includes a control system, which comprises an electronic control system and a hydraulic control system; The electronic control system includes: a control console and a compilable controller. The control console is equipped with an operation panel, which provides a human-machine interface to facilitate operators in controlling the compilable controller. The hydraulic control system includes: an oil tank, a variable displacement piston pump, a level relay, a pressure sensor, a temperature sensor, and a motor. The hydraulic control system is connected to a multi-stage lifting cylinder and a trolley cylinder. The motor is connected to the variable displacement piston pump. The oil tank is used to load hydraulic oil. The hydraulic control system controls the output flow rate of the hydraulic oil in the oil tank by adjusting the variable displacement piston pump.

[0014] Preferably, the level relay, pressure sensor, and temperature sensor are located in the oil tank. The level relay is used to detect the hydraulic oil level in the oil tank, the pressure sensor is used to detect the pressure value in the oil tank, and the temperature sensor is used to detect the hydraulic oil temperature in the oil tank.

[0015] On the other hand, the present invention also provides a device detection method, including: Step S1: By controlling the trolley hydraulic cylinder, the trolley device moves along the trolley track to the outside of the upright assembly, and the multi-stage lifting hydraulic cylinder in the lifting device retracts to its initial position. Step S2: Use hoisting equipment to slowly lower the test drill rod into the drill rod upright cylinder of the trolley device to ensure that the test drill rod is vertical and stable; Step S3: By controlling the trolley hydraulic cylinder, the trolley device is moved along the trolley track to directly below the lifting device; Step S4: Control the multi-stage lifting hydraulic cylinder to lower it, so that the drill rod connecting protrusion key is connected to the test drill rod in the drill rod vertical cylinder; Step S5: Control the multi-stage lifting hydraulic cylinder to raise the test drill rod until the test drill rod is higher than the height of the rotating blowout preventer to be tested; Step S6: By controlling the trolley hydraulic cylinder, the trolley device is moved along the trolley track to the outside of the upright assembly, and the drill pipe upright cylinder is removed from the trolley device. Step S7: Hoist the rotating blowout preventer down to the top of the trolley device and connect it to the blowout preventer mounting base; Step S8: By controlling the trolley hydraulic cylinder, the trolley device is moved along the trolley track to directly below the lifting device. The multi-stage lifting hydraulic cylinder is then lowered so that the test drill rod is inserted into the rotary blowout preventer connected to the upper end of the trolley device. Step S9: Disconnect the connection between the multi-stage lifting hydraulic cylinder and the test drill rod, and raise the multi-stage lifting hydraulic cylinder; Step S10: By controlling the hydraulic cylinder of the trolley, the test drill rod is moved to the bottom of the rotating device and docked with the rotating device. Step S11: After confirming that the rotating device is correctly connected to the test drill pipe, start the rotating motor to conduct a dynamic pressure rotation test of the rotating blowout preventer.

[0016] (III) Beneficial Effects This invention provides a rotary dynamic pressure testing device and method. By setting up a lifting device, a rotating device, and a trolley device, precise control of the test drill pipe can be achieved, improving the accuracy and reliability of the test. By setting up a trolley track, the deviation of the trolley device during operation can be effectively prevented, improving operational safety. This rotary dynamic pressure testing device provides a practical, safe, and easy-to-operate testing method for the maintenance, design, and development of rotary blowout preventers (BOPs). It enables the testing and evaluation of the dynamic sealing performance of rotary BOPs, thereby improving the reliability and safety of rotary BOPs in field applications, extending their service life, and ensuring safe drilling operations. Attached Figure Description

[0017] Figure 1 This diagram illustrates the structure of a rotational dynamic pressure testing device according to the present invention. Figure 2 This diagram shows a schematic of the lifting device structure in a rotary dynamic pressure testing apparatus according to the present invention; Figure 3 This diagram shows a schematic of the rotating device structure in a rotational dynamic pressure testing apparatus according to the present invention; Figure 4 This diagram shows a schematic of the trolley device in a rotary dynamic pressure testing apparatus according to the present invention. Figure 5 This diagram shows a schematic of the control system framework in a rotary dynamic pressure testing device according to the present invention; Figure 6 This diagram illustrates the process flow of a rotational dynamic pressure testing device and method according to the present invention. Figure 7 The diagram shows a control system flow chart of a rotary dynamic pressure testing device according to the present invention.

[0018] Wherein: 1: Lifting device; 1-1: Multi-stage lifting cylinder; 1-2: Lifting cylinder fixing plate; 1-3: Piston rod connector; 1-4: Piston rod connecting flange; 1-5: Drill rod connecting protruding key; 2: Rotating device; 2-1: Rotary motor; 2-2: Motor base; 2-3: Rotary bearing seat; 2-4: Rotary output bearing pressure plate; 2-5: Adjustable pressure-bearing screw; 2-6: Rotary handle; 2-7: Rotary flange; 2-8: Flange connecting bolt; 2-9: Connecting flange; 3: Frame assembly; 4: Cart device; 4-1: Cart base; 4-2: Cart roller; 4-3: Rotary blowout preventer fixing seat; 4-4: Drill rod upright cylinder; 4-5: Cart lifting lug; 5: Base assembly; 6: Cart cylinder; 7: Cart cylinder fixing seat; 8: Cart track; 8-1: Cart roller stop block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. 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.

[0020] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] like Figure 1-4 As shown, the present invention provides a rotational dynamic pressure testing device, comprising: Lifting device 1, upright assembly 3, trolley device 4, trolley hydraulic cylinder 6, and rotating device 2; The upper end of the upright assembly 3 is provided with a lifting device 1 and a rotating device 2, and the lower end of the upright assembly 3 is provided with a base assembly 5, which is connected to the upright assembly 3 by a number of bolts. like Figure 2 As shown, the lifting device 1 includes: a multi-stage lifting cylinder 1-1, a lifting cylinder fixing plate 1-2, a piston rod connector 1-3, a piston rod connecting flange 1-4, and a drill rod connecting protruding key 1-5. The multi-stage lifting cylinder 1-1 adopts a multi-stage telescopic structure, which can realize a wide range of height adjustment to meet the needs of different test heights. The lifting cylinder fixing plate 1-2 is integrated with the multi-stage lifting cylinder 1-1. The lifting device 1 is firmly connected to the upright assembly 3 through the lifting cylinder fixing plate 1-2. The top of the multi-stage lifting cylinder 1-1 is provided with a piston rod connector 1-3. The top of the piston rod connector 1-3 is provided with a piston rod connecting flange 1-4. The piston rod connecting flange 1-4 is installed on the top of the piston rod connector 1-3, providing a flat connection surface. The piston rod connecting flange 1-4 is provided with a drill rod connecting protrusion key 1-5. The drill rod universal connecting protrusion key 1-5 is used for quick connection and positioning with the test drill rod, ensuring the reliability and convenience of the connection.

[0022] like Figure 3 As shown, the rotating device 2 includes: a rotating motor 2-1, a motor base 2-2, a rotating bearing seat 2-3, a rotating output bearing pressure plate 2-4, an adjustable pressure-bearing screw 2-5, a rotating handle 2-6, a rotating flange seat 2-7, several flange connecting bolts 2-8, a connecting flange 2-9, and a universal connecting key for drill pipes 1-5. The motor base 2-2 has a rectangular structure. Its main function is to support and fix the rotary motor 2-1. The motor base 2-2 has a through hole in the center so that the output shaft of the rotary motor 2-1 can pass through. The lower end of the motor base 2-2 is provided with a rotary bearing seat 2-3. The rotary bearing seat 2-3 has a hollow cylindrical structure. The rotary bearing seat 2-3 is connected to the motor base 2-2 by several bolts to ensure the stability and rigidity of the entire device. The upper end of the motor base 2-2 is equipped with a rotary motor 2-1, which is the power source of the entire rotating device 2. The output shaft of the rotary motor 2-1 passes through the center of the motor base 2-2 and the rotary bearing seat 2-3 in sequence. The lower end of the rotary bearing seat 2-3 is equipped with a rotary output bearing pressure plate 2-4, an adjustable bearing screw 2-5, a rotary handle 2-6, and a rotary flange seat 2-7 in sequence. The rotary output bearing pressure plate 2-4 is used to ensure that the output shaft remains stable and concentric during rotation. The adjustable bearing screw 2-5 is used to adjust and maintain the axial pressure of the rotating device. By adjusting the screw, the device can maintain optimal performance under different load conditions. The lower end of the rotary flange seat 2-7 is equipped with a connecting flange 2-9, which is connected to the rotary flange seat 2-7 by several flange connecting bolts 2-8. The connecting flange 2-9 is equipped with a drill pipe universal connection protrusion key 1-5.

[0023] The base assembly 5 is provided with a trolley track 8, and the trolley device 4 is located on the trolley track 8. The trolley track 8 is the path for the movement of the trolley device 4. The manufacturing of the trolley track 8 must ensure sufficient strength and straightness to ensure that the trolley device 4 will not deviate or get stuck during movement. The outer wall of the trolley track 8 is provided with several trolley roller stops 8-1. The trolley roller stops 8-1 limit the trolley rollers 4-2. The function of the trolley roller stops 8-1 is to restrict the lateral movement of the trolley rollers 4-2 and prevent them from falling off the track. like Figure 4 As shown, the trolley device 4 is connected to a trolley hydraulic cylinder 6 on one side. The trolley hydraulic cylinder 6 is used to push the trolley device 4 to move along the track. The trolley hydraulic cylinder 6 adopts a multi-stage hydraulic cylinder design. Its overall structure is compact and occupies little space, making it suitable for installation and use in limited spaces. This design can provide a larger stroke and stronger thrust, adapting to a wider range of working conditions. The trolley cylinder 6 is mounted on several trolley cylinder mounting seats 7, which are evenly distributed in the base assembly 5. The trolley cylinder mounting seats 7 are provided with reinforcing ribs to enhance the rigidity and stability of the structure and prevent deformation or movement of the trolley cylinder 6 during operation. The trolley device 4 includes: a trolley base 4-1, four trolley rollers 4-2, a rotating blowout preventer fixing seat 4-3, a drill pipe upright cylinder 4-4, and several trolley lifting lugs 4-5; The trolley base 4-1 is the main component of the trolley device 4. The trolley base 4-1 has a rectangular structure. Four trolley rollers 4-2 are evenly provided at the lower end of the trolley base 4-1. The trolley rollers 4-2 are used to slide on the trolley track 8. The upper end of the trolley base 4-1 is provided with a rotating blowout preventer fixing seat 4-3 and a drill rod upright cylinder 4-4. The rotating blowout preventer fixing seat 4-3 is used to install and fix the rotating blowout preventer. The drill rod upright cylinder 4-4 is used to store and guide the test drill rod. The outer wall of the trolley base 4-1 is provided with several trolley lifting lugs 4-5. These several trolley lifting lugs 4-5 are used to lift and move the trolley device 4, which facilitates the installation, disassembly and maintenance of the trolley device 4. like Figure 5 As shown, the rotary dynamic pressure testing device also includes a control system, which includes an electrical control system and a hydraulic control system. The electrical control system consists of a control console and a compilable controller. The control console is equipped with an operation panel, which provides an intuitive human-machine interface. Operators can input commands through the operation panel, monitor the system status, and adjust control parameters as needed. The compilable controller is responsible for receiving and processing these commands and controlling the operation of the entire testing and detection device. This compilable controller can automatically adjust system parameters based on operator instructions and sensor feedback data to achieve precise control; The hydraulic control system consists of an oil tank, a variable displacement piston pump, a level relay, a pressure sensor, a temperature sensor, and an electric motor. It controls the output flow of hydraulic oil in the oil tank by adjusting the variable displacement piston pump, thereby driving the operation of the multi-stage lifting cylinder 1-1 and the trolley cylinder 6. The oil tank is used to store hydraulic oil. The tank is equipped with baffles and filters to reduce impurities in the oil and ensure the normal operation of the system. The variable displacement piston pump is a hydraulic pump with adjustable flow rate. The output flow rate is adjusted by changing the stroke length of the piston. The hydraulic control system can adjust the supply of hydraulic oil according to actual needs, thereby achieving precise control of the multi-stage lifting cylinder 1-1 and the trolley cylinder 6. The electric motor provides power to the variable displacement piston pump. The level relay is used to detect the hydraulic oil level in the tank. When the oil level is lower than the set value, the relay will send a signal to remind the operator to add hydraulic oil, which helps to prevent hydraulic control system failure due to insufficient oil. The pressure sensor is used to detect the pressure value in the tank and monitor the system pressure changes in real time. The temperature sensor is used to detect the temperature of the hydraulic oil in the tank to ensure that the hydraulic oil operates within a suitable temperature range.

[0024] The following is a detailed description of the actual working scenario of a rotary dynamic pressure testing device.

[0025] like Figure 6 As shown, the present invention provides a detection method for a rotational dynamic pressure testing device, comprising: Step S1: By controlling the trolley cylinder 6, the trolley device 4 moves along the trolley track 8 to the outside of the upright assembly 3, and the multi-stage lifting cylinder 1-1 in the lifting device 1 is retracted to the initial position. Step S2: Use hoisting equipment to slowly lower the test drill rod into the drill rod upright cylinder 4-4 of the trolley device 4 to ensure that the test drill rod is vertical and stable; Step S3: By controlling the trolley hydraulic cylinder 6, the trolley device 4 is moved along the trolley track 8 to directly below the lifting device 1. Step S4: Control the multi-stage lifting cylinder 1-1 to lower, so that the drill rod connecting protrusion key 1-5 is connected to the test drill rod in the drill rod vertical cylinder 4-4; Step S5: Control the multi-stage lifting hydraulic cylinder 1-1 to raise the test drill rod until the test drill rod is higher than the height of the rotating blowout preventer to be tested; Step S6: By controlling the trolley hydraulic cylinder 6, the trolley device 4 is moved along the trolley track 8 to the outside of the upright assembly 3, and the drill rod vertical cylinder 4-4 is removed from the trolley device 4. Step S7: Hoist the rotating blowout preventer down to the upper end of the trolley device 4 and connect it to the blowout preventer mounting base 4-3; Step S8: By controlling the trolley hydraulic cylinder 6, the trolley device 4 is moved along the trolley track 8 to directly below the lifting device 1. The multi-stage lifting hydraulic cylinder 1-1 is then lowered so that the test drill rod is inserted into the rotary blowout preventer connected to the upper end of the trolley device 4. Step S9: Disconnect the connection between the multi-stage lifting cylinder 1-1 and the test drill rod, and lift the multi-stage lifting cylinder 1-1. Step S10: By controlling the trolley hydraulic cylinder 6, the test drill rod is moved to the bottom of the rotating device 2 and docked with the rotating device 2. Step S11: After confirming that the rotating device 2 is correctly connected to the test drill rod, start the rotating motor 2-1 to conduct the dynamic pressure rotation test of the rotating blowout preventer.

[0026] like Figure 7 As shown, the control system operation flow of this rotary dynamic pressure testing device is as follows: the control system is powered on and the self-test program of the hydraulic control system is started. The self-test program performs a comprehensive check on the level, pressure and temperature of the oil tank to ensure that the hydraulic control system operates in a safe and effective state. The level relay will detect the hydraulic oil level in the oil tank, the pressure sensor will monitor the pressure value in the oil tank, and the temperature sensor will detect the temperature of the hydraulic oil in the oil tank. When the level, pressure and temperature of the oil tank in the hydraulic control system are all within the set value range, the control console is started. Through the operation panel on the control console, the operator will test run the motor and the rotary motor respectively. The purpose of the test run is to check whether these two key components are working properly. When the motor and the rotary motor have both successfully completed the test run, the test can begin.

[0027] It is understood that the various embodiments mentioned above in this invention can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this invention will not elaborate further.

[0028] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0029] This invention provides a rotary dynamic pressure testing device and method. By setting up a lifting device 1, a rotating device 2, and a trolley device 4, it achieves precise control of the test drill pipe, improving the accuracy and reliability of the test. By setting up a trolley track 8, it effectively prevents the trolley device 4 from deviating during operation, improving operational safety. This rotary dynamic pressure testing device provides a practical, safe, and easy-to-operate testing method for the maintenance, design, and development of rotary blowout preventers (BOPs). It enables the testing and evaluation of the dynamic sealing performance of rotary BOPs, thereby improving the reliability and safety of rotary BOPs in field applications, extending their service life, and ensuring safe drilling operations.

[0030] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A rotational dynamic pressure testing device, characterized in that, include: Lifting device (1), upright assembly (3), trolley device (4), base assembly (5), trolley hydraulic cylinder (6), and rotating device (2); The upper end of the upright assembly (3) is provided with a lifting device (1) and a rotating device (2), and the lower end of the upright assembly (3) is provided with a base assembly (5). The base assembly (5) is connected to the upright assembly (3) by several bolts. The base assembly (5) is provided with a trolley track (8), the trolley device (4) is provided on the trolley track (8), and a trolley hydraulic cylinder (6) is connected to one side of the trolley device (4). The trolley hydraulic cylinder (6) is provided on several trolley hydraulic cylinder fixing seats (7). The plurality of trolley hydraulic cylinder fixing seats (7) are evenly arranged in the base assembly (5).

2. The rotational dynamic pressure testing device according to claim 1, characterized in that, The lifting device (1) includes: a multi-stage lifting cylinder (1-1), a lifting cylinder fixing plate (1-2), a piston rod connector (1-3), a piston rod connecting flange (1-4), and a drill rod connecting protruding key (1-5). The lifting cylinder fixing plate (1-2) and the multi-stage lifting cylinder (1-1) are integrated. The lifting device (1) is connected to the frame assembly (3) through the lifting cylinder fixing plate (1-2). The top of the multi-stage lifting cylinder (1-1) is provided with a piston rod connector (1-3). The top of the piston rod connector (1-3) is provided with a piston rod connecting flange (1-4). The piston rod connecting flange (1-4) is provided with a drill rod connecting protrusion key (1-5). The drill rod universal connecting protrusion key (1-5) is used to connect the test drill rod.

3. The rotational dynamic pressure testing device according to claim 1, characterized in that, The rotating device (2) includes: a rotary motor (2-1), a motor base (2-2), a rotary bearing seat (2-3), a rotary output bearing pressure plate (2-4), an adjustable pressure-bearing screw (2-5), a rotary handle (2-6), a rotary flange seat (2-7), several flange connecting bolts (2-8), a connecting flange (2-9), and a universal connecting key for drill pipes (1-5). The motor base (2-2) is a rectangular structure with a through hole in the center. The lower end of the motor base (2-2) is provided with a rotary bearing seat (2-3), which is a hollow cylindrical structure. The rotary bearing seat (2-3) is connected to the motor base (2-2) by several bolts.

4. The rotational dynamic pressure testing device according to claim 3, characterized in that, The upper end of the motor base (2-2) is provided with a rotary motor (2-1). The output shaft of the rotary motor (2-1) passes through the center of the motor base (2-2) and the rotary bearing seat (2-3) in sequence. The lower end of the rotary bearing seat (2-3) is provided with a rotary output bearing pressure plate (2-4), an adjustable pressure screw (2-5), a rotary handle (2-6), and a rotary flange seat (2-7) in sequence. The lower end of the rotary flange seat (2-7) is provided with a connecting flange (2-9). The connecting flange (2-9) is connected to the rotary flange seat (2-7) by a number of flange connecting bolts (2-8). The connecting flange (2-9) is provided with a drill pipe universal connecting protrusion key (1-5).

5. The rotational dynamic pressure testing device according to claim 2, characterized in that, The trolley device (4) includes: a trolley base (4-1), four trolley rollers (4-2), a rotating blowout preventer fixing seat (4-3), a drill pipe upright cylinder (4-4), and several trolley lifting lugs (4-5). The trolley base (4-1) has a rectangular structure. Four trolley rollers (4-2) are evenly provided at the lower end of the trolley base (4-1). A rotating blowout preventer fixing seat (4-3) and a drill rod upright cylinder (4-4) are respectively provided at the upper end of the trolley base (4-1). Several trolley lifting lugs (4-5) are provided on the outer wall of the trolley base (4-1).

6. The rotational dynamic pressure testing device according to claim 5, characterized in that, The drill rod upright tube (4-4) is used to place the test drill rod, the rotary blowout preventer fixing seat (4-3) is used to fix the rotary blowout preventer, and the drill rod universal connecting protrusion key (1-5) is used to connect the test drill rod.

7. The rotational dynamic pressure testing device according to claim 5, characterized in that, The outer wall of the trolley track (8) is provided with several trolley roller stops (8-1). The trolley roller stops (8-1) limit the trolley rollers (4-2) and prevent the trolley rollers (4-2) from deviating from the trolley track (8) when the trolley track (8) is running.

8. The rotational dynamic pressure testing device according to claim 1, characterized in that, The inner wall of the trolley hydraulic cylinder fixing seat (7) is provided with several reinforcing ribs, which prevent the trolley hydraulic cylinder fixing seat (7) from shifting when the trolley hydraulic cylinder (6) is running.

9. The rotational dynamic pressure testing device according to claim 2, characterized in that, It also includes a control system, which comprises an electronic control system and a hydraulic control system; The electronic control system includes: a control console and a compilable controller. The control console is equipped with an operation panel, which provides a human-machine interface to facilitate operators in controlling the compilable controller. The hydraulic control system includes: an oil tank, a variable displacement piston pump, a level relay, a pressure sensor, a temperature sensor, and a motor. The hydraulic control system is connected to a multi-stage lifting cylinder (1-1) and a trolley cylinder (6). The motor is connected to the variable displacement piston pump. The oil tank is used to load hydraulic oil. The hydraulic control system controls the output flow rate of the hydraulic oil in the oil tank by adjusting the variable displacement piston pump.

10. The rotational dynamic pressure testing device according to claim 9, characterized in that, The level relay, pressure sensor, and temperature sensor are located in the oil tank. The level relay is used to detect the hydraulic oil level in the oil tank, the pressure sensor is used to detect the pressure value in the oil tank, and the temperature sensor is used to detect the hydraulic oil temperature in the oil tank.

11. The testing method of the rotational dynamic pressure testing device according to any one of claims 1-10, characterized in that, include: Step S1: By controlling the trolley cylinder (6), the trolley device (4) moves along the trolley track (8) to the outside of the upright assembly (3), and the multi-stage lifting cylinder (1-1) in the lifting device (1) retracts to the initial position; Step S2: Use hoisting equipment to slowly lower the test drill rod into the drill rod upright cylinder (4-4) of the trolley device (4) to ensure that the test drill rod is vertical and stable; Step S3: By controlling the trolley cylinder (6), the trolley device (4) is moved along the trolley track (8) to directly below the lifting device (1); Step S4: Control the multi-stage lifting cylinder (1-1) to lower, so that the drill rod connecting protruding key (1-5) is connected to the test drill rod in the drill rod vertical cylinder (4-4); Step S5: Control the multi-stage lifting cylinder (1-1) to raise the test drill rod until the test drill rod is higher than the height of the rotating blowout preventer to be tested; Step S6: By controlling the trolley hydraulic cylinder (6), the trolley device (4) is moved along the trolley track (8) to the outside of the frame assembly (3) to remove the drill rod vertical cylinder (4-4) from the trolley device (4); Step S7: Hoist the rotating blowout preventer down to the upper end of the trolley device (4) and connect it to the blowout preventer fixing seat (4-3). Step S8: By controlling the trolley cylinder (6), the trolley device (4) is moved along the trolley track (8) to directly below the lifting device (1), and the multi-stage lifting cylinder (1-1) is lowered so that the test drill rod is inserted into the rotating blowout preventer connected to the upper end of the trolley device (4). Step S9: Disconnect the connection between the multi-stage lifting cylinder (1-1) and the test drill rod, and lift the multi-stage lifting cylinder (1-1); Step S10: By controlling the trolley hydraulic cylinder (6), the test drill rod is moved to the bottom of the rotating device (2) and docked with the rotating device (2); Step S11: After confirming that the rotating device (2) is connected to the test drill rod correctly, start the rotating motor (2-1) to conduct the dynamic pressure rotation test of the rotating blowout preventer.

Images