Under-pressure shear test device for ram blowout preventer

Abstract

The invention relates to the technical field of drilling and production equipment detection, in particular to a ram blowout preventer under-pressure shear test device which comprises a ram blowout preventer and a test tubular column arranged in the ram blowout preventer and further comprises an upper sealing shell arranged at the upper end of the ram blowout preventer, and the upper sealing shell is in sealed butt joint with the upper end of the ram blowout preventer through a flange. According to the device, a closed pressure cavity is formed through butt joint of flanges, precise pressure stabilization control is achieved in combination with an injection barrel and a pushing piece, and a circular plate and hollow pipe sliding nesting structure is adopted; when the two circular plates are driven to synchronously rotate in the same direction by matching with the driving piece, the test tubular column is driven to deviate from the center of the ram blowout preventer, and when the two circular plates reversely rotate, a space inclination posture is formed through the phase difference of the two ends, so that complex stress states of eccentricity and inclination of the tubular column in actual working conditions are relatively completely simulated; the reproduction capability of the test device on a real well control scene is remarkably improved, and a more reliable technical support is provided for verifying the shearing performance of the blowout preventer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling equipment detection, in particular to a ram preventer pressure shearing test device. BACKGROUND

[0002] The ram preventer with pressure shearing is the core equipment of emergency well control in the petroleum industry, which realizes the rapid cutting of the pipe string such as drill pipe through the high-strength blade driven by hydraulic pressure, and completes the full-closed sealing of the wellhead relying on the deformed rubber core. However, in the pressure shearing test, the prior art can only seal the liquid pressure medium in the preventer cavity for testing, but such detection cannot well simulate the actual working condition. Because the pipe string is often in an inclined or eccentric state due to the complex downhole conditions during normal operation, rather than the ideal vertical and central state, which leads to a significant difference between the test environment and the real working scene, affecting the accuracy of the equipment performance evaluation. Therefore, we propose a ram preventer pressure shearing test device. SUMMARY

[0003] To solve the above technical problems, the present application provides a ram preventer pressure shearing test device, which comprises a ram preventer and a test pipe string arranged inside the ram preventer, further comprising an upper sealing shell arranged at the upper end of the ram preventer, the upper sealing shell being sealed and connected to the upper end of the ram preventer through a flange, the lower end of the ram preventer being connected to a lower sealing shell through a flange, the lower sealing shell being fixedly connected to an injection barrel, and the injection barrel being in conductive connection with the lower sealing shell through a conduit, the injection barrel being filled with a liquid medium, the injection barrel being provided with a pusher for pushing the liquid medium in the injection barrel into the ram preventer and maintaining a certain pressure inside the ram preventer, a circular plate being arranged in the upper sealing shell and the lower sealing shell, and a hollow tube being arranged in the circular plate, the test pipe string being arranged in the two hollow tubes at both ends and being in sliding connection with the inner walls of the two hollow tubes, and a driving member being arranged between the upper sealing shell and the lower sealing shell, the driving member driving the two circular plates to rotate in the same direction at the same time, moving the hollow tubes relative to the circular plates to drive the test pipe string to deviate from the central position of the ram preventer. When the driving member drives the two circular plates to rotate in opposite directions, the test pipe string generates a phase difference at both ends, forming a spatial inclined posture.

[0004] In some embodiments, an electric control valve is in conductive connection with the upper sealing shell. The pusher comprises a piston slidingly arranged on the inner wall of the injection barrel, one side of the piston is fixedly connected with a spring, one end of the spring is fixedly connected with a pressing plate, the pressing plate is provided with a pressure sensor, one end of the injection barrel is fixedly connected with a hydraulic push rod I, the extending end of the hydraulic push rod I is fixedly connected with a top plate, one side of the top plate is connected with the pressure sensor, the hydraulic push rod I is started and the piston is pushed to move by the spring, so that the liquid medium is filled into the gate protector.

[0005] In some embodiments, the circular plate is slidingly connected with an annular plate, the outer side of the hollow pipe is provided with an arc-shaped part, the inner side of the annular plate is provided with an arc-shaped limiting groove, the arc-shaped part is located in the arc-shaped limiting groove and is slidingly connected with the inner wall thereof; and a sliding plate is fixedly connected on the annular plate, a guide groove is formed on the circular plate, the edge of the sliding plate is located in the guide groove and is slidingly connected with the inner wall thereof.

[0006] In some embodiments, the driving member comprises an outer gear ring fixedly connected on the circular plate, a gear disc I is rotatably connected in the upper and lower sealing housings through a rotating shaft, the gear disc I is engaged with the outer gear ring, a hollow shaft II is rotatably connected in the upper and lower sealing housings, a gear disc II engaged with the gear disc I is fixedly connected on the hollow shaft II, and the gate protector is provided with a shaft III, the shaft III passes through the two hollow shafts II and is connected with the two hollow shafts II at the two ends, respectively, and rotating the shaft III drives the two circular plates to rotate; a gear disc IV is fixedly connected on the shaft III, a self-locking speed reducer motor is fixedly connected on the upper sealing housing, a gear disc V engaged with the gear disc IV is fixedly connected on the output shaft of the self-locking speed reducer motor, and the self-locking speed reducer motor is started to drive the shaft III to rotate; a rectangular plate is fixedly connected on the annular plate, a sliding column is fixedly connected on the rectangular plate, guide groove members are formed in the upper and lower sealing housings, and one end of the sliding column is located in the guide groove member, so as to push the sliding column to move when the circular plate rotates, to drive the test pipe column to move relative to the circular plate.

[0007] In some embodiments, a cylinder is fixedly connected in the hollow shaft II, a straight guide groove I is formed at one end of the shaft III, one end of the cylinder located in the upper sealing housing is located in the straight guide groove I and is slidingly connected with the inner wall thereof, a straight guide groove II is formed at the other end of the shaft III, one end of the cylinder located in the lower sealing housing is located in the straight guide groove II and is slidingly connected with the inner wall thereof, and the length of the straight guide groove II is greater than that of the straight guide groove I; a hydraulic push rod II is fixedly connected on the lower sealing housing, a push plate is fixedly connected on the extending end of the hydraulic push rod II, and one end of the push plate is rotatably connected with the shaft III, the hydraulic push rod II is started to extend, to drive the upper sealing housing to move and open.

[0008] In some embodiments, the shaft is provided with a spiral groove in communication with the straight guide groove I and the straight guide groove II, the two spiral grooves are opposite in direction, and are used for pushing the cylinder through the spiral groove to drive the two circular plates to rotate in opposite directions during the process of starting the hydraulic push rod II to retract.

[0009] In some embodiments, the guide groove member comprises an arc-shaped groove formed in the upper sealing shell and the lower sealing shell, one end of the sliding column is located in the arc-shaped groove and is in sliding connection with the inner wall thereof, and C-shaped grooves are formed in the upper sealing shell and the lower sealing shell, and the C-shaped grooves are in communication with the arc-shaped groove.

[0010] The present application has at least the following beneficial effects: The device forms a closed pressure cavity through flange butt joint, realizes precise pressure control by combining the injection barrel and the pusher, adopts a circular plate and a hollow tube sliding nested structure, and drives the two circular plates to rotate synchronously and in the same direction by the driving member, so as to drive the test pipe column to deviate from the center of the blowout preventer, and when the two circular plates rotate in opposite directions, the space is tilted, so as to more completely simulate the complex stress state of the pipe column eccentricity and inclination in the actual working condition, significantly improve the reproduction ability of the test device to the real well control scene, and provide more reliable technical support for the shear performance verification of the blowout preventer. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the overall structure of the present application; Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 3 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the overall structure of the present application; Figure 4 It is a schematic diagram of the overall structure of the present application; Figure 3 It is a schematic diagram of the overall structure of the present application; Figure 5 It is a schematic diagram of the overall structure of the present application; Figure 4 It is a schematic diagram of the overall structure of the present application; Figure 6 It is a schematic diagram of the overall structure of the present application; Figure 5 It is a schematic diagram of the overall structure of the present application; Figure 7 It is a schematic diagram of the overall structure of the present application; Figure 8 It is a schematic diagram of the overall structure of the present application; Figure 7 It is a schematic diagram of the overall structure of the present application; Figure 9 It is a schematic diagram of the overall structure of the present application; Figure 8 It is a schematic diagram of the overall structure of the present application.

[0012] In the figure: 1-ram blowout preventer; 11-test string; 2-upper sealing shell; 3-lower sealing shell; 4-injection barrel; 5-push piece; 6-circular plate; 7-driving piece; 8-hollow pipe; 13-electrically controlled valve; 14-piston; 15-spring; 16-extrusion plate; 17-pressure sensor; 18-hydraulic push rod I; 19-top plate; 21-annular plate; 22-arc-shaped part; 23-arc-shaped limiting groove; 24-sliding plate; 25-guiding groove; 26-outer gear ring; 27-toothed disc I; 28-hollow shaft II; 29-toothed disc II; 31-shaft III; 32-toothed disc IV; 33-self-locking reduction motor; 34-toothed disc V; 35-rectangular plate; 36-sliding column; 37-guiding groove piece; 38-cylinder; 39-straight guiding groove I; 41-straight guiding groove II; 42-hydraulic push rod II; 43-push plate; 44-helical groove; 45-arc-shaped groove; 46-C-shaped groove. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0014] Please refer to Figures 1-9 The present application provides a technical solution: a ram blowout preventer pressure shearing test device, comprising a ram blowout preventer 1 and a test string 11 arranged inside the ram blowout preventer 1, further comprising: The upper sealing shell 2 is arranged at the upper end of the ram blowout preventer 1 and is sealingly connected to the ram blowout preventer 1 through a flange; The lower sealing shell 3 is fixedly connected with an arc-shaped plate, and the arc-shaped plate is fixedly connected with an injection barrel 4, and the injection barrel 4 is in conductive connection with the lower sealing shell 3 through a conduit; The injection barrel 4 is fixedly connected to the lower sealing shell 3 and is in conductive connection with the lower sealing shell 3 through a conduit, and the injection barrel 4 is filled with a liquid medium; The push piece 5 is arranged in the injection barrel 4 and is used for pushing the liquid medium in the injection barrel 4 into the ram blowout preventer 1 and maintaining a certain pressure inside the ram blowout preventer 1; Two circular plates 6 are arranged in the upper sealing shell 2 and the lower sealing shell 3 respectively, and the circular plates 6 are provided with hollow pipes 8, and the test string 11 is arranged at two ends of the hollow pipes 8 and is in sliding connection with the inner walls of the hollow pipes 8; The driving piece 7 is arranged between the lower sealing shell 3 and the upper sealing shell 2 and is connected with the two circular plates 6, and in the process of driving the two circular plates 6 to rotate in the same direction by the driving piece 7, the hollow pipes 8 are driven to move relative to the circular plates 6, so as to drive the test string 11 to deviate from the center position of the ram blowout preventer 1; When the driving member 7 drives the two circular plates 6 to synchronously rotate in opposite directions in the state that the test pipe column 11 is deviated from the center position of the blind preventer 1, a phase difference is generated at both ends of the test pipe column 11, and a spatial inclined posture is formed; Specifically, the device forms a closed pressure cavity through flange butt joint, realizes precise pressure control by combining the injection barrel 4 and the pushing member 5, and adopts the sliding nested structure of the circular plate 6 and the hollow pipe 8, and when the driving member 7 drives the two circular plates to synchronously rotate in the same direction, the test pipe column 11 is deviated from the center of the blind preventer 1, and when the driving member 7 drives the two circular plates to rotate in opposite directions, a spatial inclined posture is formed through the phase difference at both ends, so as to more completely simulate the complex stress state of the pipe column eccentricity and inclination in the actual working condition, significantly improve the reproduction ability of the test device to the real well control scene, and provide more reliable technical support for the shear performance verification of the blind preventer.

[0015] The upper sealing shell 2 is connected with an electric control valve 13 in a lead-through manner, which is used for controlling the on-off state of the test cavity and the outside in real time; The pushing member 5 comprises a piston 14 which is slidingly arranged on the inner wall of the injection barrel 4, the piston 14 is fixedly connected with a spring 15 on one side, one end of the spring 15 is fixedly connected with an extrusion plate 16, the extrusion plate 16 is installed with a pressure sensor 17, the pressure sensor 17 is electrically connected with an external control system, one end of the injection barrel 4 is fixedly connected with a hydraulic push rod one 18, the extending end of the hydraulic push rod one 18 is fixedly connected with a top plate 19, one side of the top plate 19 is connected with the pressure sensor 17, specifically, after the blind preventer 1 is sealingly connected with the upper sealing shell 2 and the lower sealing shell 3 through flanges, the electric control valve 13 is opened through program control, then the hydraulic push rod one 18 is started to drive the top plate 19 to move, and then the piston 14 is moved by the spring 15, so that the liquid medium in the injection barrel 4 is filled into the lower sealing shell 3, the blind preventer 1 and the upper sealing shell 2, then the electric control valve 13 is closed, then the hydraulic push rod one 18 is continuously started to compress the spring 15, and the pressure is monitored in real time through the pressure sensor 17 in the process, until the pressure in the cavity of the blind preventer 1 reaches the set value; Meanwhile, in the process of shearing test on the shearing valve in the blind preventer 1, the extension of the shearing valve will cause the pressure in the cavity of the blind preventer 1 to rise, and then the piston 14 is extruded, so as to be detected by the pressure sensor 17, and then the hydraulic push rod one 18 is retracted in real time through program control, so as to maintain the pressure balance in the cavity of the blind preventer 1, and improve the detection accuracy.

[0016] The circular plate 6 is slidingly connected with an annular plate 21, the hollow pipe 8 is provided with an arc-shaped part 22, the inner side of the annular plate 21 is provided with an arc-shaped limiting groove 23, the arc-shaped part 22 is located in the arc-shaped limiting groove 23 and is slidingly connected with the inner wall thereof, and through the design, the hollow pipe 8 can be deflected by a certain angle relative to the annular plate 21; And the annular plate 21 is fixedly connected with a sliding plate 24, the circular plate 6 is provided with a guide groove 25, the edge of the sliding plate 24 is located in the guide groove 25 and is in sliding connection with the inner wall of the guide groove 25, for guiding and limiting the annular plate 21 to move relative to the circular plate 6.

[0017] The driving member 7 comprises an outer gear ring 26 fixedly connected to the circular plate 6, the outer gear ring 26 is in rotational connection with the upper sealing shell 2 and the lower sealing shell 3, the upper sealing shell 2 and the lower sealing shell 3 are both provided with a gear disc one 27 in rotational connection with a rotating shaft, the gear disc one 27 is in meshing connection with the outer gear ring 26, and the upper sealing shell 2 and the lower sealing shell 3 are both provided with a hollow shaft two 28 in rotational connection, the hollow shaft two 28 is fixedly connected with a gear disc two 29 in meshing connection with the gear disc one 27, and the gate valve preventer 1 is provided with a shaft three 31 on one side, the shaft three 31 passes through the two hollow shaft two 28 at both ends and is in connection with the two hollow shaft two 28, rotating the shaft three 31 drives the two circular plates 6 to rotate, rotating the shaft three 31 drives the hollow shaft two 28 at both ends to rotate, and then drives the gear disc two 29 to rotate, so as to drive the gear disc one 27 to rotate, so as to drive the circular plate 6 fixedly connected with the gear ring to rotate; And the shaft three 31 is fixedly connected with a gear disc four 32, the upper sealing shell 2 is fixedly connected with a self-locking speed reducer motor 33, the output shaft of the self-locking speed reducer motor 33 is fixedly connected with a gear disc five 34 in meshing connection with the gear disc four 32, starting the self-locking speed reducer motor 33 drives the gear disc five 34 to rotate, and then drives the gear disc four 32 to rotate, so as to drive the shaft three 31 to rotate; And the annular plate 21 is fixedly connected with a rectangular plate 35, one end of the rectangular plate 35 slides through the circular plate 6, and the rectangular plate 35 is fixedly connected with a sliding column 36, the upper sealing shell 2 and the lower sealing shell 3 are both provided with a guide groove 37, one end of the sliding column 36 is located in the guide groove 37, for driving the sliding column 36 to move when the circular plate 6 rotates, so as to drive the test pipe column 11 to move relative to the circular plate 6; The guide groove 37 comprises an arc-shaped groove 45 provided in the upper sealing shell 2 and the lower sealing shell 3, one end of the sliding column 36 is located in the arc-shaped groove 45 and is in sliding connection with the inner wall of the arc-shaped groove 45, and the upper sealing shell 2 and the lower sealing shell 3 are both provided with a C-shaped groove 46, the C-shaped groove 46 is in communication with the arc-shaped groove 45, in the initial state of the device, the hollow pipe 8 is located at the center position of the circular plate 6, at this time, the test cylinder 38 is also located at the center position of the circular plate 6, and the sliding column 36 is located in the middle of the arc-shaped groove 45; Subsequently, the self-locking reduction motor 33 is started to drive the circular plate 6 to rotate, thereby driving the sliding column 36 to slide along the arc-shaped groove 45 into the C-shaped groove 46, in the process, the sliding column 36 drives the annular plate 21 and the hollow pipe 8 to move relative to the circular plate 6, thereby driving the test pipe column 11 to deviate from the central position of the gate valve preventer 1, after that, the self-locking reduction motor 33 is continuously started to rotate, in the process of driving the sliding column 36 to slide along the C-shaped groove 46, the relative position of the test pipe column 11 which has deviated from the central position of the gate valve preventer 1 can be adjusted to improve the diversity of the test.

[0018] The hollow shaft two 28 is fixedly connected with a cylindrical column 38, the shaft three 31 is provided with a straight guide groove one 39 at one end, the cylindrical column 38 located in the upper sealing shell 2 is located in the straight guide groove one 39 and is in sliding connection with the inner wall thereof, and the shaft three 31 is provided with a straight guide groove two 41 at the other end, the cylindrical column 38 located in the lower sealing shell 3 is located in the straight guide groove two 41 and is in sliding connection with the inner wall thereof, and the length of the straight guide groove two 41 is greater than that of the straight guide groove one 39, specifically, when the corresponding cylindrical column 38 is located in the straight guide groove one 39 and the straight guide groove two 41, rotating the shaft three 31 can simultaneously drive the two hollow shafts two 28 to rotate synchronously in the same direction, so as to avoid errors; The hydraulic push rod two 42 is fixedly connected to the lower sealing shell 3, the extension end of the hydraulic push rod two 42 is fixedly connected with a push plate 43, one end of the push plate 43 is in rotating connection with the shaft three 31, in the process of starting the extension of the hydraulic push rod two 42, one end of the straight guide groove one 39 is in contact with the cylindrical column 38 in the upper sealing shell 2, then the upper sealing shell 2 is continuously started to move upward to be opened, in the process, the cylindrical column 38 located in the lower sealing shell 3 always slides in the straight guide groove two 41, the upper sealing shell 2 is moved upward to be opened, so as to facilitate the staff to disassemble and assemble the gate valve preventer 1.

[0019] The shaft three 31 is provided with a helical groove 44 which is in communication with the straight guide groove one 39 and the straight guide groove two 41, the directions of the two helical grooves 44 are opposite, which is used to drive the two circular plates 6 to rotate in opposite directions by the helical groove 44 in the process of starting the hydraulic push rod two 42 to retract; Specifically, in the process of starting the hydraulic push rod two 42 to descend and retract, the upper sealing shell 2 is first driven to descend and butt joint the gate valve preventer 1, then the hydraulic push rod two 42 is started to descend when the test pipe column 11 has deviated from the central position of the gate valve preventer 1, thereby driving the corresponding cylindrical column 38 to rotate through the helical groove 44, thereby driving the two hollow shafts two 28 to rotate synchronously in opposite directions, thereby making the test pipe column 11 have a phase difference at both ends and forming a spatial inclined posture.

[0020] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, since the scope of the present application will be limited to the appended claims. It must be noted that, as used in the specification and the appended claims, the singular form "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a plurality of components. Similarly, the words "comprise," "comprises," and "comprising," as well as the words "include," "includes," and "including," when used in this specification and in the following claims, are intended to specify the presence of stated features, regions, integers, steps, operations, elements, or components, but they do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, or groups thereof. Furthermore, these terms do not necessarily denote the presence of anything that can be claimed as new. The meaning of "a," "an," and "the" also includes plural references and plural forms, for example, "a" or "an" entity includes one or more entities.

[0021] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application as defined in the appended claims.

Claims

1. A pressure shear test apparatus for a gate blowout preventer, comprising a gate blowout preventer (1) and a test column (11) disposed therein, characterized in that, It also includes: The upper sealing housing (2) is set at the upper end of the gate blowout preventer (1) and sealed to it through a flange; The lower sealing housing (3) is located at the lower end of the gate blowout preventer (1) and is sealed to it through a flange; The injection barrel (4) is fixedly connected to the lower sealing shell (3) and is connected to the lower sealing shell (3) through a conduit. The injection barrel (4) is filled with liquid medium. The pusher (5) is set inside the injection tank (4) and is used to push the liquid medium inside the injection tank (4) into the gate blowout preventer (1) and maintain a certain internal pressure. Two circular plates (6) are respectively set in the upper sealing shell (2) and the lower sealing shell (3), and hollow tubes (8) are set in the circular plates (6). The two ends of the test tube (11) are respectively located in the two hollow tubes (8) and are slidably connected to their inner walls. The driving component (7) is located between the lower sealing housing (3) and the upper sealing housing (2) and is connected to the two circular plates (6). When the driving component (7) drives the two circular plates (6) to rotate in the same direction at the same time, it drives the hollow tube (8) to move relative to the circular plates (6) so as to drive the test column (11) to deviate from the center position of the gate blowout preventer (1). When the test column (11) is in a position away from the center of the gate blowout preventer (1), when the drive unit (7) drives the two circular plates (6) to rotate synchronously in opposite directions, a phase difference is generated at both ends of the test column (11), forming a spatial tilt posture.

2. The pressure shear test device for the gate blowout preventer according to claim 1, characterized in that: An electrically controlled valve (13) is connected to the upper sealing housing (2). The pusher (5) includes a piston (14) slidably disposed on the inner wall of the injection barrel (4). A spring (15) is fixedly connected to one side of the piston (14). A squeeze plate (16) is fixedly connected to one end of the spring (15). A pressure sensor (17) is installed on the squeeze plate (16). A hydraulic push rod (18) is fixedly connected to one end of the injection barrel (4). A top plate (19) is fixedly connected to the extended end of the hydraulic push rod (18). One side of the top plate (19) is connected to the pressure sensor (17). The hydraulic push rod (18) is activated and the piston (14) is pushed to move by the spring (15) so that the liquid medium is filled into the gate blowout preventer (1).

3. The gate blowout preventer pressure shear test device according to claim 2, characterized in that: An annular plate (21) is slidably connected inside the circular plate (6). An arc-shaped part (22) is provided on the outside of the hollow tube (8). An arc-shaped limiting groove (23) is opened on the inner side of the annular plate (21). The arc-shaped part (22) is located in the arc-shaped limiting groove (23) and is slidably connected to its inner wall. A sliding plate (24) is fixedly connected to the annular plate (21). A guide groove (25) is provided on the circular plate (6). The edge of the sliding plate (24) is located in the guide groove (25) and is slidably connected to its inner wall.

4. The gate blowout preventer pressure shear test device according to claim 3, characterized in that: The driving component (7) includes an external gear ring (26) fixedly connected to the circular plate (6). The upper sealing housing (2) and the lower sealing housing (3) are rotatably connected to a gear disk (27) via a rotating shaft. The gear disk (27) meshes with the external gear ring (26). The upper sealing housing (2) and the lower sealing housing (3) are rotatably connected to a hollow shaft (28). The hollow shaft (28) is fixedly connected to a gear disk (29) that meshes with the gear disk (27). The gate blowout preventer (1) is provided with a shaft (31) on one side. The two ends of the shaft (31) pass through two hollow shafts (28) respectively and are connected to the two hollow shafts (28). Rotating the shaft (31) drives the two circular plates (6) to rotate. Furthermore, a gear disk four (32) is fixedly connected to the shaft three (31), a self-locking geared motor (33) is fixedly connected to the upper sealing housing (2), and a gear disk five (34) that meshes with the gear disk four (32) is fixedly connected to the output shaft of the self-locking geared motor (33). The self-locking geared motor (33) is started to drive the shaft three (31) to rotate. A rectangular plate (35) is fixedly connected to the annular plate (21), and a sliding column (36) is fixedly connected to the rectangular plate (35). Guide grooves (37) are provided in both the upper sealing shell (2) and the lower sealing shell (3). One end of the sliding column (36) is located in the guide groove (37) and is used to push the sliding column (36) to move when the circular plate (6) rotates, so as to drive the test tube column (11) to move relative to the circular plate (6).

5. The pressure shear test device for the gate blowout preventer according to claim 4, characterized in that: A cylinder (38) is fixedly connected inside the hollow shaft two (28). A straight guide groove one (39) is opened at one end of the shaft three (31). One end of the cylinder (38) located in the upper sealing housing (2) is located in the straight guide groove one (39) and is slidably connected to its inner wall. A straight guide groove two (41) is opened at the other end of the shaft three (31). One end of the cylinder (38) located in the lower sealing housing (3) is located in the straight guide groove two (41) and is slidably connected to its inner wall. The opening length of the straight guide groove two (41) is greater than that of the straight guide groove one (39). A hydraulic push rod 2 (42) is fixedly connected to the lower sealing housing (3). A push plate (43) is fixedly connected to the extended end of the hydraulic push rod 2 (42). One end of the push plate (43) is rotatably connected to the shaft 3 (31). The hydraulic push rod 2 (42) is extended to drive the upper sealing housing (2) to move and open.

6. The pressure shear test device for the gate blowout preventer according to claim 5, characterized in that: The shaft three (31) is provided with a spiral groove (44) that communicates with the straight guide groove one (39) and the straight guide groove two (41). The two spiral grooves (44) are in opposite directions and are used to push the cylinder (38) through the spiral grooves (44) during the process of starting the hydraulic push rod two (42) to retract, so as to drive the two circular plates (6) to rotate in opposite directions.

7. The gate blowout preventer pressure shear test device according to claim 6, characterized in that: The guide groove (37) includes an arc-shaped groove (45) opened in the upper sealing shell (2) and the lower sealing shell (3). One end of the sliding column (36) is located in the arc-shaped groove (45) and is slidably connected to its inner wall. C-shaped grooves (46) are opened in both the upper sealing shell (2) and the lower sealing shell (3). The C-shaped grooves (46) are connected to the arc-shaped grooves (45).

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