A valve group for offshore oil production

Abstract

This invention discloses a valve assembly used in offshore oil development, relating to the field of valve maintenance technology. It includes a control valve comprising a valve body and a valve cover. A valve seat is installed within the valve body, and a valve stem with a valve disc mounted on it. The valve body has an input end and an output end, both containing flow detection elements. One side of the input end of the control valve is fixedly connected to a filter valve. A removable filter screen is installed inside the filter valve, and a valve core is installed on one side of the screen, near the input end. An adjusting element is installed on the outer wall of the filter valve, connected to the filter core. This invention uses a filter valve to block impurities in crude oil, preventing wear on valve components and reducing the valve assembly's sealing performance. Simultaneously, the control valve precisely controls the flow of crude oil, and the buffer valve disc cushions the impact of blocked crude oil on the control valve's interior, reducing water hammer and significantly improving the valve assembly's safety performance.

Description

Technical Field

[0001] This invention relates to the field of valve maintenance technology, specifically a valve assembly used in offshore oil and gas operations. Background Technology

[0002] In the process of offshore oil extraction, various valve assemblies are widely used in wellhead production trees, oil pipelines and processing facilities to control fluid flow direction, regulate flow rate and ensure the safe operation of the system. The harsh marine environment places extremely high demands on the reliability, durability and ease of maintenance of valve assemblies.

[0003] Crude oil extracted from seafloor oil reservoirs often contains solid impurities such as silt, rock fragments, rust, and scale. Traditional valve assemblies typically only have simple filters on the main pipeline, but these filters are mostly single-stage filters with limited filtration accuracy. A large number of tiny particles can still enter downstream precision components such as control valves and regulating valves. These impurities cause abrasive wear between the valve core and the valve seat sealing surfaces, leading to decreased sealing performance and even internal leakage, seriously affecting the safe operation of the valve assembly.

[0004] Traditional filter valves require periodic shutdowns to disassemble the filter screen for manual cleaning. However, performing such operations in the confined space of an offshore platform is not only time-consuming and labor-intensive, but may also introduce new contaminants during disassembly, increasing the risk of system leaks.

[0005] In offshore oil extraction, the fluid velocity in pipelines changes drastically due to sea surface fluctuations, equipment start-up and shutdown, and emergency shutdowns, generating strong pressure fluctuations known as water hammer. Traditional valve assemblies, particularly check valves or shut-off valves, often rely solely on a single valve disc for rapid closure in response to backflow impacts. The pressure peak generated at the moment of closure can be several times the normal operating pressure, easily causing valve body rupture, seal failure, or damage to pipeline supports, seriously threatening platform safety.

[0006] Therefore, there is an urgent need in this field for a valve assembly for offshore oil development that can improve the safety and service life of the valve assembly by filtering impurities from the medium and suppressing the water hammer effect. Summary of the Invention

[0007] The purpose of this invention is to provide a valve assembly for offshore oil exploration to solve the problems mentioned in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: The valve assembly used in this offshore oil development includes a control valve, which includes a valve body and a valve cover. A valve seat is installed inside the valve body, and a valve stem is also provided inside the valve body. A valve disc is installed on the valve stem. An input end and an output end are provided on the valve body. Flow detection elements are provided in both the input end and the output end. One side of the input end of the control valve is fixedly connected to a filter valve. A detachable filter screen is installed inside the filter valve. A valve core is installed on one side of the detachable filter screen. The filter core is close to the input end. An adjusting element is installed on the outer wall of the filter valve, and the adjusting element is connected to the filter core.

[0009] As a preferred technical solution, a baffle is provided on the top of the valve body, a drive motor is provided on the valve cover, a mounting base is provided near the input end, and an overflow groove is provided on the side wall of the mounting base.

[0010] As a preferred technical solution, the valve seat is embedded in the mounting base, and the valve seat sidewall is uniformly provided with overflow holes, which are connected to the overflow groove.

[0011] As a preferred technical solution, one end of the valve stem is connected to the drive motor, and the other end of the valve stem passes through the partition and is inserted into the input end. A buffer spring is sleeved on the valve stem, and the buffer spring is restricted between the partition and the valve disc.

[0012] As a preferred technical solution, the valve disc includes a main valve disc and a buffer valve disc. A sealing ring is provided at the connection between the main valve disc and the valve stem. A main sealing plate is provided at the bottom of the main valve disc. A buffer chamber is provided in the middle of the main valve disc. Buffer holes are evenly opened at the bottom of the buffer chamber. A retaining ring is provided at the top of the buffer chamber. The buffer valve disc is located in the buffer chamber. A secondary sealing plate is provided at the bottom of the buffer valve disc. The buffer valve disc is fixedly connected to the buffer spring.

[0013] As a preferred technical solution, the outer wall of the filter valve is provided with an inlet and an outlet, the inlet and the outlet are respectively located on both sides of the detachable filter element, the inlet is located on the side closer to the valve core, and the outer wall of the filter valve is also provided with a fixing seat, on which a worm gear is installed.

[0014] As a preferred technical solution, the detachable filter element includes a filter element and fixing rings on both sides of the filter element. The fixing rings are mirror-shaped and symmetrically provided with connecting ears. A fastening screw is inserted into the connecting ear. One end of the fastening screw is provided with a rotating tooth. The fastening screw is fixed by the fixing seat, and the rotating tooth meshes with the worm gear.

[0015] As a preferred technical solution, the detachable filter element includes a filter element and fixing rings on both sides of the filter element. The fixing rings are mirror-shaped and symmetrically provided with connecting ears. A fastening screw is inserted into the connecting ear. One end of the fastening screw is provided with a rotating tooth. The fastening screw is fixed by the fixing seat, and the rotating tooth meshes with the worm gear.

[0016] As a preferred technical solution, the adjusting component includes a bracket installed on the outer wall of the filter valve, an adjusting worm gear rotatably connected to the bracket, the adjusting worm gear meshing with the worm wheel, and an adjusting motor installed on one side of the adjusting worm gear.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a filter valve to block impurities in crude oil, preventing them from entering the filter valve and control valve and causing wear on the valve assembly's components, thus reducing the valve assembly's sealing performance and affecting its service life. At the same time, the control valve can precisely control the flow of crude oil. During the closing process of the control valve, the buffer valve disc can buffer the impact of blocked crude oil on the control valve's interior, reducing the water hammer effect of the fluid and greatly improving the safety performance of the valve assembly.

[0018] 2. During crude oil transportation, flow detection devices installed at the inlet and outlet of the control valve can detect the oil flow in real time, facilitating precise control of oil transportation and timely detection of leaks in the pipeline, thus ensuring the safety of oil transportation.

[0019] 3. When there are too many impurities attached to the filter element, the filter valve channel can be closed by adjusting the control valve core. Then, high-pressure water jet is sprayed into the inlet to remove the impurities on the surface of the filter element through reverse flushing and discharge through the outlet, thus achieving self-cleaning of the filter element. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the main body of the present invention; Figure 3 This is a cross-sectional structural diagram of the control valve of the present invention; Figure 4 This is a cross-sectional view of the main valve disc of the present invention; Figure 5 This is a schematic diagram of the structure of the filter valve of the present invention; Figure 6 yes Figure 3 Enlarged structural diagram at point A; Figure 7 yes Figure 5 A magnified structural diagram at point B in the middle.

[0021] In the diagram: 1. Control valve; 2. Valve seat; 3. Valve stem; 4. Valve disc; 5. Flow detection element; 6. Filter valve; 7. Removable filter screen; 8. Valve core; 9. Adjusting element; 11. Valve body; 12. Valve cover; 13. Mounting base; 21. Overflow hole; 31. Buffer spring; 41. Main valve disc; 42. Buffer valve disc; 43. Buffer chamber; 61. Inlet; 62. Outlet; 63. Fixing base; 71. Filter element; 72. Fixing ring; 73. Fastening screw; 81. Rotating shaft; 91. Bracket; 92. Adjusting worm gear; 93. Adjusting motor; 1101 Input end; 1102 Output end; 1103 Partition plate; 1201 Drive motor; 1301 Overflow groove; 4101 Sealing ring; 4102 Main sealing plate; 4201 Secondary sealing plate; 4301 Buffer hole; 4302 Retaining ring; 6301 Worm gear; 7201 Connecting ear; 7301 Rotating gear; 8101 Worm wheel; 8102 Sealing ring. Detailed Implementation

[0022] 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.

[0023] Example: Figures 1-7 As shown, this invention provides a technical solution for a valve assembly used in offshore oil drilling. The valve assembly includes a control valve 1, which comprises a valve body 11 and a valve cover 12. A valve seat 2 is installed inside the valve body 11, and a valve stem 3 is also provided inside the valve body 11. A valve disc 4 is mounted on the valve stem 3. An input end 1101 and an output end 1102 are provided on the valve body 11. Flow detection elements 5 are installed in both the input end 1101 and the output end 1102. One side of the input end 1101 of the control valve 1 is fixedly connected to a filter valve 6. A removable filter screen 7 is installed inside the filter valve 6, and one side of the removable filter screen 7 is fixedly connected to a filter valve 6. The filter valve 6 is equipped with a valve core 8 and a filter element 8 located near the input end 1101. An adjusting element 9 is installed on the outer wall of the filter valve 6 and is connected to the filter element 8. This invention can block impurities in crude oil through the filter valve 6, preventing impurities from entering the filter valve 6 and the wear parts inside the control valve 1, which would reduce the sealing performance of the valve assembly and affect its service life. At the same time, the flow of crude oil can be precisely controlled through the control valve 1. During the closing process of the control valve 1, the buffer valve disc 42 can buffer the impact of blocked crude oil on the inside of the control valve 1, reduce the water hammer effect of the fluid, and greatly improve the safety performance of the valve assembly.

[0024] During oil transportation, the oil first enters the filter valve 6 through a pipeline. A filter element 71 is installed in the middle of the filter valve 6, dividing it into two parts via the filter element 8. One part contains the valve core 8, and this part of the filter valve 6 has an inlet 61 on its pipe wall, while the other part has an outlet 62. After passing through the filter element 71, the oil in the filter valve 6 can filter out impurities, preventing these impurities from entering the valve assembly and wearing down the seals, thus reducing the valve assembly's sealing performance. Next, the oil passes through the filter valve 6 and enters the control valve 1 from the input end 1101. A flow detection device is installed in the input end 1101 to measure the flow rate of the oil entering the control valve 1 in real time. When the valve is opened, oil enters the valve body 11 and is discharged from the output end 1102. Similarly, a flow detection element 5 is also installed in the output end 1102. By comparing the flow rate detected at the input end 1101 and the output end 1102, it can be determined whether an oil leak has occurred, thus ensuring the safety of oil transportation. When the flow detection element 5 at the input end 1101 detects that the flow rate is too high, the regulating motor 93 is started. The regulating motor 93 drives the regulating worm 92 to rotate, which in turn drives the worm wheel 8101 meshing with the regulating worm 92 to rotate. Finally, the valve core 8 rotates around the rotating shaft 81. The rotation of the valve core 8 changes the passage size in the filter valve 6, thereby regulating the flow rate of oil entering the input end 1101.

[0025] A baffle 1103 is provided on the top of the valve body 11, a drive motor 1201 is provided on the valve cover 12, and a mounting base 13 is provided near the input end 1101. An overflow groove 1301 is provided on the side wall of the mounting base 13.

[0026] The valve seat 2 is embedded in the mounting base 13. The side wall of the valve seat 2 is uniformly provided with overflow holes 21, which are connected to the overflow groove 1301.

[0027] One end of the valve stem 3 is connected to the drive motor 1201, and the other end of the valve stem 3 passes through the partition 1103 and is inserted into the input end 1101. A buffer spring 31 is sleeved on the valve stem 3, and the buffer spring 31 is restricted between the partition 1103 and the valve disc 4.

[0028] The valve disc 4 includes a main valve disc 41 and a buffer valve disc 42. A sealing ring 4101 is provided at the connection between the main valve disc 41 and the valve stem 3. A main sealing plate 4102 is provided at the bottom of the main valve disc 41. A buffer chamber 43 is provided in the middle of the main valve disc 41. Buffer holes 4301 are evenly opened at the bottom of the buffer chamber 43. A retaining ring 4302 is provided at the top of the buffer chamber 43. The buffer valve disc 42 is located in the buffer chamber 43. A secondary sealing plate 4201 is provided at the bottom of the buffer valve disc 42. The buffer valve disc 42 is fixedly connected to the buffer spring 31. When it is necessary to close the control valve 1, the valve stem 3 is pushed down by the drive motor 1201, so that the valve disc 4 at the bottom of the valve stem 3 is tightly attached to the mounting seat 13 on the valve body 11, thereby closing the passage for oil to enter the valve body 11. The main sealing plate 4102 at the bottom of the main valve disc 41 can be tightly attached to the mounting seat 13 to ensure the sealing performance of the main valve disc 41. During the process of the main valve disc 41 being pressed down, the buffer valve disc... 42 also moves under the restoring force of the buffer spring 31, but the descent speed of the buffer valve disc 42 is slightly slower than that of the main valve disc 41. Since the oil will collide with the lower surface of the main valve disc 41 after the main valve disc 41 is closed, it will generate a large instantaneous impact force on the main valve disc 41, which can easily damage the valve disc. Therefore, a buffer chamber 43 is provided in the main valve disc 41, and several buffer holes 4301 are provided at the bottom of the buffer chamber 43. At this time, after the control valve 1 is closed, most of the oil that should have collided with the main valve disc 41 enters the buffer chamber 43 through the buffer holes 4301, avoiding the oil directly impacting the valve disc 4 and causing damage to the valve disc. Then the buffer valve disc 42 enters the buffer chamber 43 until it moves to the bottom of the buffer chamber 43, and the oil that has entered the buffer chamber 43 is also discharged. By setting the main valve disc 41 and the buffer valve disc 42, the water hammer effect of the fluid can be suppressed, thereby improving the service life of the control valve 1.

[0029] The filter valve 6 has an inlet 61 and an outlet 62 on its outer wall. The inlet 61 and outlet 62 are located on both sides of the detachable filter element 7. The inlet 61 is located on the side closer to the valve core 7. The filter valve 6 also has a fixing seat 63 on its outer wall, and a worm gear 6301 is installed on the fixing seat 63.

[0030] The detachable filter element 7 includes a filter element 71 and retaining rings 72 on both sides of the filter element 71. The retaining rings 72 are mirror-shaped and symmetrically equipped with connecting ears 7201. Fastening screws 73 are inserted into the connecting ears 7201. One end of the fastening screw 73 is provided with a rotating tooth 7301. The fastening screw 73 is fixed by a fixing seat 63, and the rotating tooth 7301 meshes with the worm gear 6301. The retaining rings 72 on both sides fix the filter element 71. Then, the fastening screw 73 passes through the connecting ears 7201 on both sides of the retaining rings 72 and is inserted into the fixing seat 63 on the filter valve 6. Thus, the detachable filter element 7 can be fixed on the filter valve 6. During the long-term operation of the filter valve 6, too many impurities may adhere to the surface of the filter element 8, which will affect the filtration effect. At this time, the adjusting motor 93 can be started first. First, the valve core 8 closes the filter valve 6. Then, the inlet 61 and outlet 62 are connected to the outside. High-pressure water is introduced into the inlet 61. After entering the filter valve 6 through the inlet 61, the high-pressure water backwashes the filter element 71, washing off the impurities attached to the filter element 71 and discharging them through the outlet 62, thus achieving self-cleaning of the filter element 71. When the filter element 8 exceeds its service life, it must be replaced with a new filter element 8. First, the above steps need to be repeated. The filter valve 6 is closed by adjusting the motor 93. Then, the worm gear 6301 is rotated, which drives the fastening screw 73 that meshes with it to rotate. As a result, the two fixing rings 72 fixed by the fastening screw 73 become loose, and the filter element 71 can be directly taken out of the filter valve 6 for replacement. Afterwards, the fastening screw 73 is tightened by the worm gear 6301 to complete the replacement of the filter element 71.

[0031] A rotating shaft 81 is provided in the middle of the valve core 8, and a worm gear 8101 is provided at one end of the rotating shaft 81. The worm gear 8101 is located on the outer wall of the filter valve 6, and a sealing ring 8102 is provided at the edge of the valve core 8.

[0032] The adjusting component 9 includes a bracket 91 mounted on the outer wall of the filter valve 6. An adjusting worm 92 is rotatably connected to the bracket 91. The adjusting worm 92 meshes with the worm wheel 8101. An adjusting motor 93 is mounted on one side of the adjusting worm 92.

[0033] Working principle of the invention: During oil transportation, oil first enters filter valve 6 through pipeline. Filter element 71 is installed in the middle of filter valve 6, which is divided into two parts by filter element 8. One part contains valve core 8, and the pipe wall of this part of filter valve 6 has an inlet 61, while the pipe wall of the other part has an outlet 62. After passing through filter element 71 in filter valve 6, impurities are screened out, preventing these impurities from entering the valve assembly and wearing down the seals, thus reducing the sealing performance of the valve assembly. Then, oil passes through filter valve 6 and enters control valve 1 from input end 1101. A flow detection device is installed in input end 1101 to measure the flow rate of oil entering control valve 1 in real time. When control valve is opened, oil enters valve body 11 and is discharged from output end 1102. Similarly, a flow detection device 5 is also installed in output end 1102. By comparing the flow rates detected at input end 1101 and output end 1102, it can be determined whether an oil leak has occurred, ensuring the safety of oil transportation.

[0034] When the flow detection element 5 at the input end 1101 detects that the flow rate is too high, the regulating motor 93 is started. The regulating motor 93 drives the regulating worm 92 to rotate, which in turn drives the worm wheel 8101 meshing with the regulating worm 92 to rotate. Finally, the valve core 8 rotates around the rotating shaft 81. The rotation of the valve core 8 changes the size of the passage in the filter valve 6, thereby regulating the flow rate of oil entering the input end 1101.

[0035] When control valve 1 needs to be closed, the drive motor 1201 pushes the valve stem 3 downward, causing the valve disc 4 at the bottom of the valve stem 3 to press tightly against the mounting seat 13 on the valve body 11, thereby closing the passage for oil to enter the valve body 11. The main sealing plate 4102 at the bottom of the main valve disc 41 can fit tightly against the mounting seat 13, ensuring the sealing performance of the main valve disc 41. During the downward pressing of the main valve disc 41, the buffer valve disc 42 also moves under the restoring force of the buffer spring 31, but the downward speed of the buffer valve disc 42 is slightly slower than that of the main valve disc 41. Because after the main valve disc 41 is closed, the oil will collide with the lower surface of the main valve disc 41, generating a relatively large force on the main valve disc 41. Large instantaneous impact forces can easily damage the valve disc. Therefore, a buffer chamber 43 is provided in the main valve disc 41, and several buffer holes 4301 are provided at the bottom of the buffer chamber 43. When the control valve 1 is closed, most of the oil that should have collided with the main valve disc 41 enters the buffer chamber 43 through the buffer holes 4301, avoiding direct impact of oil on the valve disc 4 and causing damage to the valve disc. Then the buffer valve disc 42 enters the buffer chamber 43 until it moves to the bottom of the buffer chamber 43, and the oil that has entered the buffer chamber 43 is also discharged. By setting the main valve disc 41 and the buffer valve disc 42, the water hammer effect of the fluid can be suppressed, thereby improving the service life of the control valve 1.

[0036] The retaining rings 72 on both sides fix the filter element 71. Then, the fastening screws 73 pass through the connecting ears 7201 on both sides of the retaining rings 72, and the fastening screws 73 are inserted into the fixing seat 63 on the filter valve 6. Thus, the detachable filter element 7 can be fixed on the filter valve 6. During the long-term operation of the filter valve 6, too many impurities will adhere to the surface of the filter element 8, which will affect the filtration effect. At this time, the regulating motor 93 can be started first. By regulating the motor 93, the valve core 8 will close the filter valve 6. Then, the inlet 61 and outlet 62 are connected to the outside, and high-pressure water is introduced into the inlet 61. The high-pressure water enters the filter valve 6 through the inlet 61. Afterwards, the water flows backwards and washes off the impurities attached to the filter element 71, which are then discharged through the outlet 62, thus achieving self-cleaning of the filter element 71. When the filter element 8 exceeds its service life, it must be replaced with a new filter element 8. First, the above steps need to be repeated. The filter valve 6 is closed by adjusting the motor 93. Then, the worm gear 6301 is rotated, which drives the fastening screw 73 that meshes with it to rotate. As a result, the two fixing rings 72 that are fixed by the fastening screw 73 become loose, and the filter element 71 inside the filter valve 6 can be directly taken out for replacement. Afterwards, the fastening screw 73 is tightened by the worm gear 6301 to complete the replacement of the filter element 71.

[0037] This invention uses a filter valve 6 to block impurities in crude oil, preventing them from entering the filter valve 6 and the control valve 1 and causing wear on the components, which would reduce the sealing performance of the valve assembly and affect its service life. At the same time, the control valve 1 can precisely control the flow of crude oil. During the closing process of the control valve 1, the buffer valve disc 42 can buffer the impact of the blocked crude oil on the inside of the control valve 1, reduce the water hammer effect of the fluid, and greatly improve the safety performance of the valve assembly.

[0038] During crude oil transportation, the flow detection element 5 installed at the inlet and outlet of the control valve 1 can detect the flow rate of oil in real time, which facilitates precise control of oil transportation, can detect whether there is a leak in the pipeline in time, and ensures the safety of oil transportation.

[0039] When there are too many impurities attached to the filter element 71, the filter valve 6 channel can be closed by controlling the valve core 8 through the adjusting component 9. Then, high-pressure water is sprayed into the inlet 61 to remove the impurities on the surface of the filter element 71 through reverse flushing and discharge through the outlet 62, thereby achieving self-cleaning of the filter element 71.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A valve assembly used in offshore oil exploration, characterized in that: The valve assembly used in this offshore oil development includes a control valve (1), which includes a valve body (11) and a valve cover (12). A valve seat (2) is installed inside the valve body (11), and a valve stem (3) is also provided inside the valve body (11). A valve disc (4) is installed on the valve stem (3). An input end (1101) and an output end (1102) are provided on the valve body (11). Flow detection elements (5) are provided inside both the input end (1101) and the output end (1102). One side of the input end (1101) of the control valve (1) is fixedly connected to a filter valve (6). A detachable filter screen (7) is installed inside the filter valve (6). A valve core (8) is installed on one side of the detachable filter screen (7). The filter core (8) is close to the input end (1101). An adjusting element (9) is installed on the outer wall of the filter valve (6). The adjusting element (9) is connected to the filter core (8).

2. The valve assembly used in offshore oil development according to claim 1, characterized in that: The valve body (11) is provided with a partition plate (1103) on the top, the valve cover (12) is provided with a drive motor (1201), and a mounting base (13) is provided near the input end (1101). An overflow groove (1301) is provided on the side wall of the mounting base (13).

3. The valve assembly used in offshore oil development according to claim 2, characterized in that: The valve seat (2) is embedded in the mounting base (13), and the valve seat (2) has overflow holes (21) uniformly arranged around its side wall. The overflow holes (21) are connected to the overflow groove (1301).

4. The valve assembly used in offshore oil development according to claim 3, characterized in that: One end of the valve stem (3) is connected to the drive motor (1201), and the other end of the valve stem (3) passes through the partition (1103) and is inserted into the input end (1101). A buffer spring (31) is sleeved on the valve stem (3), and the buffer spring (31) is restricted between the partition (1103) and the valve disc (4).

5. A valve assembly for offshore oil exploration according to claim 4, characterized in that: The valve disc (4) includes a main valve disc (41) and a buffer valve disc (42). A sealing ring (4101) is provided at the connection between the main valve disc (41) and the valve stem (3). A main sealing plate (4102) is provided at the bottom of the main valve disc (41). A buffer chamber (43) is provided in the middle of the main valve disc (41). Buffer holes (4301) are evenly opened at the bottom of the buffer chamber (43). A retaining ring (4302) is provided at the top of the buffer chamber (43). The buffer valve disc (42) is located in the buffer chamber (43). A secondary sealing plate (4201) is provided at the bottom of the buffer valve disc (42). The buffer valve disc (42) is fixedly connected to the buffer spring (31).

6. A valve assembly for offshore oil exploration according to claim 5, characterized in that: The filter valve (6) has an inlet (61) and an outlet (62) on its outer wall. The inlet (61) and the outlet (62) are located on both sides of the detachable filter element (7). The inlet (61) is located on the side closer to the valve core (7). The filter valve (6) also has a fixing seat (63) on its outer wall. A worm gear (6301) is installed on the fixing seat (63).

7. A valve assembly for offshore oil exploration according to claim 6, characterized in that: The detachable filter element (7) includes a filter element (71) and fixing rings (72) on both sides of the filter element (71). The fixing rings (72) are mirror images of each other. Connecting ears (7201) are symmetrically arranged on the fixing rings (72). Fastening screws (73) are inserted into the connecting ears (7201). One end of the fastening screw (73) is provided with a rotating tooth (7301). The fastening screw (73) is fixed by the fixing seat (63). The rotating tooth (7301) meshes with the worm gear (6301).

8. A valve assembly for offshore oil exploration according to claim 7, characterized in that: A rotating shaft (81) is provided in the middle of the valve core (8), and a worm gear (8101) is provided at one end of the rotating shaft (81). The worm gear (8101) is located on the outer wall of the filter valve (6), and a sealing ring (8102) is provided at the edge of the valve core (8).

9. A valve assembly for offshore oil exploration according to claim 8, characterized in that: The adjusting component (9) includes a bracket (91) mounted on the outer wall of the filter valve (6), an adjusting worm (92) rotatably connected to the bracket (91), the adjusting worm (92) meshing with the worm wheel (8101), and an adjusting motor (93) mounted on one side of the adjusting worm (92).

Images