Oil and gas well fluid control valve with pressure amplifier

Abstract

The invention relates to the technical field of petroleum engineering, in particular to an oil and gas well fluid control valve with a pressure amplifier. A liquid inlet and a liquid outlet are formed in the two sides of the valve body respectively, a valve rod is arranged above the valve body, a valve element is arranged at the bottom of the valve rod, armature pads are arranged on the two sides of the top of the valve rod, a shell is clamped to the top of the valve body, a top cover is arranged above the shell, the shell and the top cover are fixed through bolts, and a valve control assembly is arranged in the shell. A third iron core is controlled to rotate to the position above a valve element, the third iron core adsorbs an armature pad, a valve rod drives the valve element to move upwards in the vertical direction, at the moment, the opening degree of a valve seat is small, a rack is driven to move upwards in the upward moving process of the valve element, the rack drives a rotating gear to rotate, and therefore an included angle of 30 degrees is formed between a flow through hole formed in the surface of a ball element and the valve seat; even if the flow of fluid in a pipeline is suddenly increased, the speed of the fluid passing through the flow through holes in the surface of the ball core is reduced, so that the fluid is indirectly prevented from quickly passing through the liquid outlet, and the fluid flow is controlled.

Description

Technical Field

[0001] This invention relates to the field of petroleum engineering technology, and more specifically, to a fluid control valve for oil and gas wells with a pressure amplifier. Background Technology

[0002] Petroleum, hailed as the "lifeblood of industry," occupies a pivotal position in the global energy structure and industrial system. From exploration and extraction to transportation and storage, refining and processing, and the distribution of final products, the entire petroleum industry chain involves numerous complex and critical links. Within this vast industrial system, petroleum control valves act like precision regulators in the "blood vessels," playing an indispensable role.

[0003] There are many existing technologies for oil control valves, such as: Chinese Patent Publication No. CN205877348U discloses a novel solenoid valve for well completion testing in oil wells. It includes: an armature, an armature pad, a valve core, an upper valve body, an upper spring baffle, a spring, a lower spring baffle, an upper sealing baffle, an upper valve sleeve, a lower valve sleeve, a lower sealing baffle, and a lower valve body. The valve body remains normally closed in the non-operating state due to spring force. When energized, the electromagnetic pull force actuates the valve stem, opening the valve and connecting the inside and outside of the well casing. After de-energization, the valve closes under the combined force of the valve stem's own weight and the spring force, blocking the connection between the inside and outside.

[0004] However, some problems still exist in actual use: 1. In the current use of traditional control valves, the viscosity of the fluid in the oil pipeline will change with the ambient temperature (such as the low temperature of the pipeline in winter causing the viscosity of crude oil to increase), which in turn changes the fluid resistance and the pressure difference across the valve. These fluctuations will directly interfere with the balance of the mechanical feedback structure, causing the valve opening adjustment to deviate. Existing solenoid valves can only open and close individually and cannot accurately adjust the valve size. 2. The aging of a solenoid valve coil is a gradual process, typically taking 3-6 months from "beginning of aging" to "complete failure." However, traditional solenoid valves lack coil status monitoring capabilities, making it impossible to provide early warnings of aging trends. When a coil suddenly fails, causing valve malfunction, operators need to investigate the cause, leading to equipment downtime and impacting production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a fluid control valve for oil and gas wells with a pressure amplifier to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a fluid control valve for oil and gas wells with a pressure amplifier, comprising a valve body, an inlet and an outlet on both sides of the valve body, a valve stem on the top of the valve body, a valve core at the bottom of the valve stem, armature pads on both sides of the top of the valve stem, a housing snapped onto the top of the valve body, a top cover on the top of the housing, the housing and the top cover being fixed by bolts, a valve control assembly inside the housing for controlling the opening and closing of the valve body, a flow control assembly inside the valve body for controlling the flow rate, the flow control assembly operating synchronously with the valve control assembly to control the flow rate during the valve body opening and closing process, and a clamping assembly on one side of the valve control assembly for clamping and fixing the valve control assembly.

[0007] As a further improvement to this technical solution, the bottom of the valve core is hollow. Under normal circumstances, the valve stem drives the valve core to seal the valve body under the action of gravity.

[0008] As a further improvement to this technical solution, the valve control assembly includes a motor located on the top of the top cover. The output end of the motor passes through the top cover and has a main gear at its end. A secondary gear is located on one side of the main gear. The tooth ratio between the main gear and the motor is 1:3. The secondary gear rotates at the center of the top cover.

[0009] As a further improvement to this technical solution, a turntable is provided at the bottom of the auxiliary gear. The turntable rotates coaxially with the auxiliary gear. A first iron core, a second iron core, and a third iron core are provided at the bottom of the turntable. Two sets of the first iron core, the second iron core, and the third iron core are respectively arranged in an axially symmetrical manner.

[0010] As a further improvement to this technical solution, the height of the first iron core, the second iron core and the third iron core from the horizontal plane increases sequentially, and their surfaces are all wound with coils, with a coil ratio of 1:2:3.

[0011] As a further improvement to this technical solution, the flow control component includes a ball core disposed in the valve body, a flow passage hole is provided in the middle of the ball core, a rotating shaft is provided between the ball core and the valve body, the ball core rotates at the bottom of the valve core, the valve core and the valve body are sealed, and a rotating gear is provided on the side of the ball core away from the rotating shaft.

[0012] As a further improvement to this technical solution, a torsion spring is provided on the surface of the rotating shaft. Under normal circumstances, the flow passage of the ball core is perpendicular to the valve core due to the force of the torsion spring.

[0013] As a further improvement to this technical solution, a rack is provided on one side of the valve core. The rack is set in contact with the side wall of the rotating gear. When the valve core moves in the vertical direction, the rack drives the rotating gear to mesh and rotate.

[0014] As a further improvement to this technical solution, the clamping assembly includes a placement slot at the bottom of the turntable, the placement slots are arranged in an array, the side wall of the placement slot is provided with a column, the inner wall of the column is slidably provided with a slide rod, a compression spring is provided between the placement slot and the column, the slide rod passes through the placement slot and has a clamping plate at its end, the clamping plate is used to clamp the top of the first iron core.

[0015] As a further improvement to this technical solution, a limiting bolt is provided at the end of the column, which is used to limit the sliding rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this oil and gas well fluid control valve with pressure amplifier, when fluid transportation is not required, the valve core is driven by gravity to move the valve stem downward in the vertical direction until the valve core seals the valve seat inside the valve body, thereby preventing backflow when fluid transportation is stopped and avoiding fluid contamination.

[0017] 2. In this oil and gas well fluid control valve with pressure amplifier, the output shaft of the control motor drives the main gear to rotate coaxially. When the main gear rotates, it drives the secondary gear to mesh and rotate. When it is necessary to increase the fluid pressure, the control third iron core rotates to above the armature pad. Since the coil wound on the surface of the third iron core is three times that of the first iron core, the magnetic force generated by the third iron core is stronger. The third iron core magnetically attracts the armature pad, and the valve core moves in the vertical direction. Since the height difference between the third iron core and the armature pad is the largest, the valve seat opening between the valve core and the valve body increases after the third iron core is larger than the armature pad after attraction, the flow resistance decreases, and the outlet pressure increases. Conversely, when it is necessary to reduce the fluid pressure, the control first iron core rotates to above the armature pad. The magnetic force generated by the first iron core is smaller, the valve seat opening between the valve core and the valve body decreases, the flow resistance increases, and the outlet pressure decreases, thereby controlling the fluid pressure.

[0018] 3. In this oil and gas well fluid control valve with pressure amplifier, by controlling the third iron core to rotate above the valve core, the third iron core attracts the armature pad, causing the valve stem to drive the valve core to move vertically. At this time, the valve seat opening is small. During the upward movement of the valve core, the rack moves upward, and the rack drives the rotating gear to rotate, so that the flow passage hole on the surface of the ball core has a 30° angle with the valve seat. Even if the fluid flow rate in the pipeline suddenly increases, the fluid speed through the flow passage hole on the surface of the ball core slows down, thereby indirectly preventing the fluid from passing through the outlet quickly and realizing the control of the fluid flow rate. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3This is a schematic diagram of the valve body structure of the present invention; Figure 4 This is a cross-sectional view of the valve control assembly of the present invention; Figure 5 This is a cross-sectional view of the valve body of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram at point A; Figure 7 This is a cross-sectional view of the valve control assembly of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram at point B.

[0020] The meanings of the labels in the diagram are as follows: 100. Valve body; 101. Liquid inlet; 102. Liquid outlet; 103. Valve stem; 104. Valve core; 105. Armature pad; 200. Outer shell; 201. Top cover; 300. Valve control assembly; 301. Motor; 302. Main gear; 303. Secondary gear; 304. Turntable; 305. First iron core; 306. Second iron core; 307. Third iron core; 400. Flow control assembly; 401. Ball core; 402. Shaft; 403. Torsion spring; 404. Rotating gear; 405. Rack; 500, Clamping assembly; 501, Placement slot; 502, Column; 503, Slide rod; 504, Compression spring; 505, Clamping plate; 506, Limit bolt. Detailed Implementation

[0021] 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.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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.

[0023] The purpose of this embodiment is to provide a fluid control valve for oil and gas wells with a pressure amplifier. (See attached document.) Figures 1-8 As shown, the device includes a valve body 100, with an inlet 101 and an outlet 102 on each side. The inlet 101 and outlet 102 can be replaced by threaded pipes. A valve stem 103 is located above the valve body 100, with a valve core 104 at the bottom of the stem 103. Armature pads 105 are located on both sides of the top of the stem 103. A housing 200 is snapped onto the top of the valve body 100, and a top cover 201 is located on top of the housing 200. The housing 200 and the top cover 201 are fixed together by bolts. The valve body 100 is equipped with a valve control component 300, which is used to control the opening and closing of the valve body 100. The valve body 100 is equipped with a flow control component 400, which is used to control the flow rate. During the opening and closing of the valve body 100, the flow control component 400 works synchronously with the valve control component 300 to control the flow rate. A clamping component 500 is provided on one side of the valve control component 300, which is used to clamp and fix the valve control component 300.

[0024] When the control fluid passes through the valve body 100, to prevent backflow when the fluid transport stops, the bottom of the valve core 104 is hollow. Under normal circumstances, the valve stem 103 drives the valve core 104 to seal the valve body 100 under the action of gravity. When the fluid transport operation is not required, the valve core 104 drives the valve stem 103 to move downward in the vertical direction under the action of gravity until the valve core 104 seals the valve seat inside the valve body 100, thereby preventing backflow when the fluid transport operation stops and preventing fluid contamination.

[0025] Considering the need to control fluid pressure when fluid flows through the valve body 100, the valve control assembly 300 includes a motor 301 mounted on the top of the top cover 201. The output end of the motor 301 passes through the top cover 201 and has a main gear 302 at its end. A secondary gear 303 is located on one side of the main gear 302. The tooth ratio between the main gear 302 and the secondary gear 303 is 1:3. The secondary gear 303 rotates at the center of the top cover 201. A turntable 304 is located at the bottom of the secondary gear 303. The turntable 304 and the secondary gear... Wheel 303 rotates coaxially. The bottom of turntable 304 is equipped with an iron core, which includes a first iron core 305, a second iron core 306, and a third iron core 307. Two sets of the first iron core 305, second iron core 306, and third iron core 307 are arranged symmetrically along an axis. The height of the first iron core 305, second iron core 306, and third iron core 307 from the horizontal plane increases sequentially. All of their surfaces are wound with coils in a coil ratio of 1:2:3. The flow control valve's flow rate control is based on the flow rate formula in fluid mechanics. in For traffic, For flow coefficient, The pressure difference across the valve. Let be the fluid density. Taking a common throttling control valve as an example, the flow coefficient is adjusted by changing the flow cross-sectional area between the valve core 104 and the valve body 100. Flow control is achieved. When the actuator is driven to move by a signal from the control system, the valve core 104 will generate axial displacement, thereby changing the opening between the valve core 104 and the valve body 100. If the flow area between the valve body 104 and the valve core 104 increases, the flow coefficient will increase. Increase, in pressure difference and fluid density Under relatively stable conditions, according to the flow formula, the fluid flow rate through valve body 100 is... The flow rate will increase; conversely, when the flow area decreases, the flow coefficient will decrease. Reduce, flow Then it will decrease accordingly; When the fluid flow rate is constant and the fluid pressure needs to be controlled, the output shaft of the control motor 301 drives the main gear 302 to rotate coaxially. The rotation of the main gear 302 drives the secondary gear 303 to mesh and rotate. When the fluid pressure needs to be increased, the control motor 307 rotates to above the armature pad 105. Because the coil wound on the surface of the third iron core 307 is three times that of the first iron core 305, the magnetic force generated by the third iron core 307 is stronger. The third iron core 307 magnetically attracts the armature pad 105, causing the valve core 104 to move vertically. The height difference between the third iron core 307 and the armature pad 105 is the largest. After the third iron core 307 is greater than the armature pad 105, the valve seat opening between the valve core 104 and the valve body 100 increases, the flow resistance decreases, and the outlet pressure increases. Conversely, when it is necessary to reduce the fluid pressure, by controlling the first iron core 305 to rotate above the armature pad 105, the magnetic force generated by the first iron core 305 is smaller, the valve seat opening between the valve core 104 and the valve body 100 decreases, the flow resistance increases, and the outlet pressure decreases, thereby achieving precise control of the fluid pressure. Meanwhile, when any coil on the surface of the first iron core 305, the second iron core 306, and the third iron core 307 is short-circuited, it can be quickly adjusted and replaced to prevent the valve core 104 from sealing with the valve seat inside the valve body 100 and to ensure normal fluid transmission.

[0026] Considering that the presence of particulate impurities in the fluid can easily lead to gaps between the valve core 104 and the valve seat in the valve body 100, causing fluid to continue flowing through these gaps when fluid transport stops, resulting in fluid waste, the flow control assembly 400 includes a ball core 401 disposed within the valve body 100. The ball core 401 has a flow passage in its center. A rotating shaft 402 is provided between the ball core 401 and the valve body 100. The ball core 401 rotates at the bottom of the valve core 104, and a seal is formed between the valve core 104 and the valve body 100. The ball core 401 has a rotating gear 404 on the side away from the rotating shaft 402, and a torsion spring 403 is provided on the surface of the rotating shaft 402. Under normal circumstances, the flow passage of the ball core 401 is perpendicular to the valve core 104 due to the force of the torsion spring 403. When the fluid stops transporting, the ball core 401 is blocked by the force of the torsion spring 403 against the valve seat inside the valve body 100, so that the fluid is isolated outside the outlet 102. Thus, even when there is a gap between the valve core 104 and the valve seat, the fluid can still be blocked, avoiding fluid waste.

[0027] To prevent a sudden increase in flow rate that could lead to excessive fluid velocity and excessive fluid output from outlet 102 during fluid control, a rack 405 is provided on one side of the valve core 104. The rack 405 is positioned against the side wall of the rotating gear 404. When the valve core 104 moves vertically, the rack 405 drives the rotating gear 404 to mesh and rotate. Under normal circumstances, the opening of the valve core 104 and the valve seat inside the valve body 100 is controlled according to the flow rate. If the flow rate is low, the third iron core 307 is controlled to rotate above the valve core 104. The three iron cores 307 attract the armature pad 105, causing the valve stem 103 to move the valve core 104 vertically. At this time, the valve seat opening is small. During the upward movement of the valve core 104, the rack 405 is moved upward. The rack 405 drives the rotating gear 404 to rotate, so that the flow passage on the surface of the ball core 401 has a 30° angle with the valve seat. Even if the fluid flow in the pipeline suddenly increases, the fluid speed through the flow passage on the surface of the ball core 401 is slowed down, thereby indirectly preventing the fluid from passing through the outlet 102 quickly and realizing the control of the fluid flow.

[0028] When the surface coils of the first iron core 305, the second iron core 306, and the third iron core 307 have been used for a long time, they need to be maintained and replaced. Therefore, the clamping assembly 500 includes a placement groove 501 located at the bottom of the turntable 304. The placement grooves 501 are arranged in an array. A column 502 is provided on the side wall of the placement groove 501. A slide rod 503 is slidably provided on the inner wall of the column 502. A compression spring 504 is provided between the placement groove 501 and the column 502. The slide rod 503 passes through the placement groove 501 and has a clamping plate 505 at its end. The clamping plate 505 is used to clamp the top of the first iron core 305. The end of the column cylinder 502 is provided with a limiting bolt 506, which is used to limit the sliding rod 503. By rotating the limiting bolt 506, it moves away from the sliding rod 503. By pulling the first iron core 305, the first iron core 305 squeezes the clamping plate 505. The sliding rod 503 slides on the inner wall of the column cylinder 502 and squeezes the compression spring 504, thereby increasing the distance between the clamping plates 505. This allows the first iron core 305 to be quickly removed and the coil wound on its surface to be replaced. When maintenance is completed, by inserting the end of the first iron core 305 between the clamping plates 505, the clamping plates 505 are quickly limited by the reverse force of the compression spring 504. At the same time, the limiting bolt 506 is rotated to fix the position of the sliding rod 503, thereby ensuring the stability of the iron core during its rotation.

[0029] In practical use, the valve stem 103 drives the valve core 104 to seal the valve body 100 under the action of gravity. When fluid transportation is not required, the valve core 104 drives the valve stem 103 to move downward in the vertical direction under the action of gravity until the valve core 104 seals the valve seat inside the valve body 100, thereby preventing backflow when fluid transportation stops and preventing fluid contamination. The output shaft of motor 301 drives the main gear 302 to rotate coaxially. When the main gear 302 rotates, it drives the secondary gear 303 to mesh and rotate. When fluid pressure needs to be increased, the third iron core 307 is controlled to rotate above the armature pad 105. Because the coil wound on the surface of the third iron core 307 is three times that of the first iron core 305, the magnetic force generated by the third iron core 307 is stronger. The third iron core 307 magnetically attracts the armature pad 105, causing the valve core 104 to move vertically. Because the third iron core 307 and... The height difference between the armature pads 105 is the largest. After the third iron core 307 is greater than the armature pads 105, the valve seat opening between the valve core 104 and the valve body 100 increases, the flow resistance decreases, and the outlet pressure increases. Conversely, when it is necessary to reduce the fluid pressure, by controlling the first iron core 305 to rotate above the armature pads 105, the magnetic force generated by the first iron core 305 is smaller, the valve seat opening between the valve core 104 and the valve body 100 decreases, the flow resistance increases, and the outlet pressure decreases, thereby controlling the fluid pressure. The flow passage of the ball core 401 is perpendicular to the valve core 104 under the force of the torsion spring 403. When the fluid stops transporting, the ball core 401 is blocked by the torsion spring 403 to the valve seat inside the valve body 100, so that the fluid is isolated outside the outlet 102. This also prevents fluid waste when there is a gap between the valve core 104 and the valve seat. The third iron core 307 is rotated to the position above the valve core 104. The third iron core 307 attracts the armature pad 105, causing the valve stem 103 to drive the valve core 104 to move vertically. At this time, the valve seat opening is small. During the upward movement of the valve core 104, the rack 405 is driven to move upward. The rack 405 drives the rotating gear 404 to rotate, so that the flow passage hole on the surface of the ball core 401 has a 30° angle with the valve seat. Even if the fluid flow rate in the pipeline suddenly increases, the fluid speed through the flow passage hole on the surface of the ball core 401 is slowed down, thereby indirectly preventing the fluid from passing through the outlet 102 quickly and realizing the control of the fluid flow rate.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fluid control valve for oil and gas wells with a pressure amplifier, characterized in that: The system includes a valve body (100), with an inlet (101) and an outlet (102) on both sides of the valve body (100). A valve stem (103) is located on the top of the valve body (100), and a valve core (104) is located at the bottom of the valve stem (103). Armature pads (105) are located on both sides of the top of the valve stem (103). A housing (200) is snapped onto the top of the valve body (100), and a top cover (201) is located on the top of the housing (200). The housing (200) and the top cover (201) are fixed together by bolts. A valve is located inside the housing (200). A control component (300) is provided, wherein the valve control component (300) is used to control the opening and closing of the valve body (100), and the valve body (100) is provided with a flow control component (400) for controlling the flow rate. During the process of the valve control component (300) controlling the opening and closing of the valve body (100), the flow control component (400) works synchronously with the valve control component (300) to control the flow rate. A clamping component (500) is provided on one side of the valve control component (300), and the clamping component (500) is used to clamp and fix the valve control component (300).

2. The oil and gas well fluid control valve with pressure amplifier according to claim 1, characterized in that: The bottom of the valve core (104) is hollow. Under normal circumstances, the valve stem (103) drives the valve core (104) to seal the valve body (100) under the action of gravity.

3. The oil and gas well fluid control valve with pressure amplifier according to claim 1, characterized in that: The valve control assembly (300) includes a motor (301) located on the top of the top cover (201). The output end of the motor (301) passes through the top cover (201) and is provided with a main gear (302) at its end. A secondary gear (303) is provided on one side of the main gear (302). The tooth ratio of the main gear (302) to the secondary gear (303) is 1:

3. The secondary gear (303) rotates at the center of the top cover (201).

4. The oil and gas well fluid control valve with pressure amplifier according to claim 3, characterized in that: The bottom of the auxiliary gear (303) is provided with a turntable (304), which rotates coaxially with the auxiliary gear (303). The bottom of the turntable (304) is provided with a first iron core (305), a second iron core (306) and a third iron core (307). The first iron core (305), the second iron core (306) and the third iron core (307) are provided in two sets and are arranged symmetrically on the axis.

5. The oil and gas well fluid control valve with pressure amplifier according to claim 4, characterized in that: The first iron core (305), the second iron core (306) and the third iron core (307) are at progressively increasing heights from the horizontal plane, and their surfaces are all wound with coils in a coil ratio of 1:2:

3.

6. The oil and gas well fluid control valve with pressure amplifier according to claim 1, characterized in that: The flow control assembly (400) includes a ball core (401) disposed inside the valve body (100). A flow passage is provided in the middle of the ball core (401). A rotating shaft (402) is provided between the ball core (401) and the valve body (100). The ball core (401) rotates at the bottom of the valve core (104). The valve core (104) and the valve body (100) are sealed. A rotating gear (404) is provided on the side of the ball core (401) away from the rotating shaft (402).

7. The oil and gas well fluid control valve with pressure amplifier according to claim 6, characterized in that: The rotating shaft (402) is provided with a torsion spring (403). Under normal circumstances, the flow passage of the ball core (401) under the action of the torsion spring (403) is perpendicular to the valve core (104).

8. The oil and gas well fluid control valve with pressure amplifier according to claim 6, characterized in that: The valve core (104) is provided with a rack (405) on one side. The rack (405) is set in contact with the side wall of the rotating gear (404). When the valve core (104) moves in the vertical direction, the rack (405) drives the rotating gear (404) to mesh and rotate.

9. The oil and gas well fluid control valve with pressure amplifier according to claim 1, characterized in that: The clamping assembly (500) includes a placement slot (501) located at the bottom of the turntable (304). The placement slots (501) are arranged in an array. A column (502) is provided on the side wall of the placement slot (501). A slide rod (503) is slidably provided on the inner wall of the column (502). A compression spring (504) is provided between the placement slot (501) and the column (502). The slide rod (503) passes through the placement slot (501) and has a clamping plate (505) at its end. The clamping plate (505) is used to clamp the top of the first iron core (305).

10. The oil and gas well fluid control valve with pressure amplifier according to claim 9, characterized in that: The end of the column (502) is provided with a limiting bolt (506), which is used to limit the sliding rod (503).

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