Hydraulically controlled fracturing manifold

Abstract

The invention relates to a hydraulically-controlled fracturing manifold, which belongs to the technical field of anti-aggregation valves and comprises a pipeline and a valve body, a valve rod for connection is arranged on the top surface of the valve body, a fixing pin is fixedly mounted at one end of the valve rod, a sliding plate frame is fixedly mounted on the surface of the fixing pin, and a sliding plate is fixedly mounted in the sliding plate frame. According to the valve body structure, in the conveying process, by means of the arrangement of the spraying layer, it is guaranteed that fracturing fluid cannot be attached to the surface of the sliding plate, and the valve body structure can adapt to high-speed conveying of the fracturing fluid; and in the closing process of the valve body in the device, the impact of fracturing fluid can be buffered through a buffer ring cavity, the impact force can be used for driving a buffer ring pad to generate displacement, in this way, an extrusion piston block in a movable cylinder can extrude a sealing ring, and the sealing performance of the conveyed fracturing fluid can be improved while the impact of a water hammer is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-aggregation valves, in particular to a hydraulic control fracturing manifold. BACKGROUND

[0002] The hydraulic control fracturing manifold is a key core ground equipment system in modern shale oil and gas, tight oil and gas and other large volume fracturing operations, and it is a highly integrated high-pressure fluid distribution and switching hub driven and controlled by hydraulic pressure.

[0003] The hydraulic control fracturing manifold generates high temperature inside, and the main heat source is the control system itself and the fracturing fluid flowing through the manifold. Thus, the valve position in the hydraulic control fracturing manifold bears the double extreme working conditions from the hydraulic control system and the high-pressure fracturing fluid, and the sudden start or stop of the hydraulic oil flow will generate water hammer effect, forming pressure shock waves in the hydraulic pipeline, which will cause the valve actuator to bear instantaneous overload, causing the connecting piece to loosen, the internal components to fatigue damage, and even the valve rod to deform.

[0004] In order to solve the above problems, we propose a hydraulic control fracturing manifold. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical scheme: a hydraulic control fracturing manifold, comprising a pipeline and a valve body, the top surface of the valve body is provided with a valve rod for connection, one end of the valve rod is fixedly installed with a fixed pin, and the surface of the fixed pin is fixedly installed with a sliding plate frame, the inside of the sliding plate frame is fixedly installed with a sliding plate, and the inside of the valve body is wrapped with a plate seat on the left and right sides of the sliding plate, and the opposite sides of the surface of the plate seat are both embeddedly fixedly installed with a sealing ring; The opposite side of the inside of the valve body is provided with an embedded groove, the surface of the plate seat is embedded with a spring, and the inner wall of the embedded groove is provided with a disc spring, one side of the disc spring is connected with a disc spring gland, and the inner wall of the embedded groove is provided with a disc spring sealing piece on one side of the disc spring gland, the inside of the valve body is provided with a buffer ring cavity on one side of the embedded groove, and a plurality of inclined openings are formed on the side of the buffer ring cavity away from the sliding plate, the inner wall of the buffer ring cavity is slidably installed with a buffer ring pad, and a plurality of movable cylinders are fixedly installed on the side of the buffer ring cavity away from the sealing ring, and the inner wall of the movable cylinder is movably installed with an extrusion piston block.

[0006] Further, the sliding plate frame is a frame body with holes, and the sliding plate is arranged on the circumferential side of the hole of the sliding plate frame.

[0007] Further, the hole of the slide bracket is a fan-shaped through-hole structure, opposite ends of the pipeline are fixedly installed with RJ flanges opposite to opposite sides of the valve body, two corresponding RJ flanges are fixedly connected through fastening bolts, the movable cylinder extends through the surface of the sealing ring, the buffer ring pad and the movable cylinder are filled with nitrogen, the slide bracket protruding part is matched with the slide coating to ensure that the sealing surface is attached during sliding, the fan-shaped flow channel design reduces local resistance loss, compared with the traditional straight-through valve, the device is more energy-saving, the smooth transition flow channel structure can reduce the material retention dead zone, cooperate with the self-cleaning effect in the sliding process of the slide, and reduce the probability of blockage, and is suitable for viscous materials or particle-containing materials with poor flowability.

[0008] Further, the plate seat is a hole plate structure, and the hole of the plate seat is in communication with the inside of the valve body, and the inside of the valve body is coated with a flange spray coating on one side of the two plate seats, the combination design of the sealing ring, the flange spray coating and the valve cavity inner wall treatment realizes the complete isolation of the medium flow channel and the valve cavity, avoids the problems of internal component corrosion and blockage caused by material entering the valve cavity of the existing valve, and is especially suitable for easy caking and corrosive material working conditions.

[0009] Further, the material of the flange spray coating is polytetrafluoroethylene, and the surface of the slide is coated with a slide spray coating, the surface of the slide spray coating is coated with a slide wrapping layer, the combination of the plate seat and the slide is inserted, and the combination of the spray coating and the wrapping layer is set, so that the smoothness of the material conveying process is guaranteed, the adhesion of the material to the inside of the device is avoided, and the normal use function of the device is guaranteed.

[0010] Further, the hole position of the slide bracket is protruding, the thickness of the protrusion is equal to the sum of the thicknesses of the slide spray coating and the slide wrapping layer, the surface of the slide bracket is slidingly connected with the surface of the plate seat, the slide spray coating and the plate seat spray coating are prepared by supersonic flame spraying process, and the slide wrapping layer and the plate seat wrapping layer are covered on the surface of the tungsten carbide coating by mold pressing sintering process, the combination of the above ensures that the structure in the device is a composite structure of hard coating wear-resistant and soft coating sealing, and the flange spray coating adopts electrostatic spraying process to ensure the overall sealing of the connection surface of the valve body and the plate seat. The device uses the hard coating of tungsten carbide to improve the wear resistance of the sealing surface, the soft coating of polytetrafluoroethylene realizes the effect of zero leakage sealing, cooperates with the self-lubricating property of flexible graphite, solves the problem of material leakage of fine particle materials in the conveying process under the action of high pressure and high temperature of the traditional valve.

[0011] Further, the surface of the plate seat is provided with a plate seat spray coating layer, and the surface of the plate seat spray coating layer is coated with a plate seat wrapping layer, and the disc springs in the device are combined in a superimposed manner, specifically 2-4 pieces in series, the springs form double elastic support, the double elastic support structure offsets thermal expansion and contraction stress, there is no risk of deformation and jamming under the condition of temperature difference alternation, the flange spray sealing design of the valve body and the plate seat avoids medium leakage at the connection, improves the overall structural sealing performance, the disc spring sealing piece cooperates with flexible graphite to ensure the sealing stability under high temperature working conditions, the flexible graphite sealing piece and the polytetrafluoroethylene and tungsten carbide coating have chemical inertness of acid and alkali resistance and organic solvent resistance, can adapt to various media such as gas, liquid and powder, and can also be used in high temperature and corrosive working conditions, thereby increasing the applicability of the device.

[0012] Further, the material of the slide plate spray coating layer and the plate seat spray coating layer is tungsten carbide, and the material of the slide plate wrapping layer and the plate seat wrapping layer is polytetrafluoroethylene.

[0013] Further, the surfaces of the two plate seats are fixedly connected with the inside of the valve body, and the surface of the plate seat forms a valve cavity with the inside of the valve body.

[0014] Further, the surface of the disc spring sealing piece is connected with the surface of the plate seat by flexible graphite.

[0015] Compared with the prior art, the hydraulic control fracturing manifold provided by the present application has the following beneficial effects: 1. The valve body structure in the device utilizes the setting of the spray coating layer during the conveying process, which not only ensures that the fracturing fluid does not adhere to the surface of the slide plate, but also adapts to the high-speed conveying of the fracturing fluid, and the valve body in the device can utilize the buffer ring cavity to buffer the impact of the fracturing fluid during the closing process, and can also utilize the impact force to drive the displacement of the buffer ring pad, so that the extrusion piston block in the movable cylinder will extrude the sealing ring, achieving the reduction of water hammer impact and the improvement of the sealing performance of the conveyed fracturing fluid.

[0016] 2. The device utilizes the combined insertion of the plate seat and the slide plate, and cooperates with the setting of the spray coating layer and the wrapping layer, which can ensure the smoothness of the material conveying process, avoid the adhesion of the material inside the device, and ensure the normal use function of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the whole application; Figure 2 It is a sectional view of the valve body of the application; Figure 3 It is Figure 2 the enlarged structure schematic view of part A; Figure 4 It is a lateral sectional view of the valve body of the application; Figure 5A perspective view of the buffer ring pad of the present application; Figure 6 A perspective view of the sliding plate of the present application; Figure 7 A perspective view of the plate seat part of the present application; Figure 8 A perspective view of the sliding plate part of the present application.

[0018] In the figure: 1, valve body; 2, valve rod; 3, fixed pin; 4, sliding plate frame; 5, sliding plate; 6, plate seat; 601, flange spraying layer; 602, sliding plate spraying layer; 603, sliding plate wrapping layer; 604, plate seat spraying layer; 605, plate seat wrapping layer; 7, embedded groove; 8, valve cavity; 9, spring; 10, disc spring; 11, disc spring cover; 12, disc spring sealing element; 13, sealing ring; 14, pipeline; 1401, RJ type flange; 15, buffer ring cavity; 16, bevel; 17, buffer ring pad; 18, movable cylinder; 19, extrusion piston block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a 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 labor fall within the scope of protection of the present application.

[0020] Please refer to Figures 1 to 8 The hydraulic control fracturing manifold in the embodiment includes a pipeline 14 and a valve body 1. The top surface of the valve body 1 is provided with a valve rod 2 for connection. One end of the valve rod 2 is fixedly installed with a fixed pin 3. The surface of the fixed pin 3 is fixedly installed with a sliding plate frame 4. The sliding plate frame 4 is a frame body with a hole. The sliding plate 5 is arranged on the circumferential side of the hole of the sliding plate frame 4. The hole of the sliding plate frame 4 is provided in a fan-shaped through hole structure. The sliding plate 5 is fixedly installed inside the sliding plate frame 4. The inside of the valve body 1 is wrapped with a plate seat 6 on the left and right sides of the sliding plate 5. The opposite sides of the surface of the plate seat 6 are both fixedly installed with a sealing ring 13. The plate seat 6 is a plate body structure with a hole. The hole of the plate seat 6 is in communication with the inside of the valve body 1. The inside of the valve body 1 is coated with a flange spraying layer 601 on one side of the two plate seats 6. The total thickness tolerance of the protruding part of the slide plate frame 4 combined with the slide plate coating in the device is ±0.02 mm, which ensures that the sealing surface fitting gap is less than 0.01 mm during sliding. The fan-shaped flow channel design reduces local resistance loss, and compared with traditional straight-through valves, it is more energy-saving. The smooth transition flow channel structure can reduce material retention dead zones, and cooperate with the self-cleaning effect of the slide plate 5 during sliding to reduce the probability of blockage. It is suitable for the delivery of viscous materials or particulate materials with poor flowability; The material of the flange spray coating 601 is polytetrafluoroethylene, the surface of the slide plate 5 is coated with a slide plate spray coating 602, the surface of the slide plate spray coating 602 is coated with a slide plate wrapping layer 603, the hole position of the slide plate frame 4 is protruding, the thickness of the protrusion is equal to the sum of the thicknesses of the slide plate spray coating 602 and the slide plate wrapping layer 603, the surface of the slide plate frame 4 is slidingly connected with the surface of the plate seat 6, the surface of the plate seat 6 is provided with a plate seat spray coating 604, and the surface of the plate seat spray coating 604 is coated with a plate seat wrapping layer 605, the materials of the slide plate spray coating 602 and the plate seat spray coating 604 are tungsten carbide, the materials of the slide plate wrapping layer 603 and the plate seat wrapping layer 605 are polytetrafluoroethylene, the surfaces of the two plate seats 6 are fixedly connected with the inside of the valve body 1, and the surface of the plate seat 6 forms a valve cavity 8 with the inside of the valve body 1; The slide plate spray coating 602 and the plate seat spray coating 604 of the present application are prepared by supersonic flame spraying process, and the coating thickness is controlled within 0.15-0.3 mm. The slide plate wrapping layer 603 and the plate seat wrapping layer 605 are covered on the surface of the tungsten carbide coating by a mold pressing sintering process, with a thickness of 0.08-0.12 mm. The above combination ensures that the structure in the device is a composite structure of hard coating wear-resistant and soft coating sealing. The flange spray coating 601 adopts electrostatic spraying process to ensure the overall sealing of the connection surface between the valve body 1 and the plate seat 6. The device uses tungsten carbide hard coating to improve the wear resistance of the sealing surface, and polytetrafluoroethylene soft coating to achieve zero leakage sealing effect. Combined with the self-lubricating property of flexible graphite, the problem of material leakage that may occur during the delivery of fine particulate materials under high pressure and high temperature is avoided; Among them, the inside of the valve body 1 located on the opposite side of the plate seat 6 is provided with an embedded groove 7, and the surface of the plate seat 6 is embedded with a spring 9. The inner wall of the embedded groove 7 is provided with a disc spring 10, one side of the disc spring 10 is connected with a disc spring gland 11, and the inner wall of the embedded groove 7 is provided with a disc spring sealing element 12 on one side of the disc spring gland 11. The surface of the disc spring sealing element 12 is connected with the surface of the plate seat 6 by using flexible graphite; A buffer ring cavity 15 is provided inside the valve body 1 on one side of the embedded groove 7. Several oblique openings 16 are provided on the inner wall of the buffer ring cavity 15 away from the slide plate 5. A buffer ring pad 17 is slidably installed on the inner wall of the buffer ring cavity 15. Several movable cylinders 18 are fixedly installed on the inner wall of the buffer ring cavity 15 on one side of the sealing ring 13. A compression piston block 19 is movably installed on the inner wall of the movable cylinder 18. RJ type flanges 1401 are fixedly installed on both opposite ends of the pipe 14 and opposite sides of the valve body 1. Two corresponding RJ type flanges 1401 are fixedly connected by fastening bolts. The movable cylinder 18 extends through to the surface of the sealing ring 13. Nitrogen gas is filled between the buffer ring pad 17 and the several movable cylinders 18. During normal transport, the piston block 19 of this device pushes the sealing ring 13, preventing fracturing fluid leakage during transport. The buffer ring pad 17 provides additional radial compensation force to the plate seat 6 to ensure sealing during fracturing fluid transport. When water hammer occurs, the high pressure wave enters the buffer ring cavity 15 through the inclined port 16, compressing nitrogen gas and thus actively absorbing the impact. The device is sealed by the buffer ring cavity 15 and the coating. This buffer structure serves as impact compensation and protection for the fracturing fluid. The disc springs 10 inside the device are stacked and combined in a series of 2-4 pieces. The springs 9 form a double elastic support. The double elastic support structure offsets the stress of thermal expansion and contraction, and there is no risk of deformation and jamming under alternating temperature conditions. The flange spray sealing design of valve body 1 and plate seat 6 avoids media leakage at the connection and improves the overall structural sealing performance. The disc spring seal 12, together with flexible graphite, ensures the sealing stability under high temperature conditions. The flexible graphite seal and the polytetrafluoroethylene and tungsten carbide coating have chemical inertness and resistance to acids, alkalis and organic solvents, and can be adapted to various media such as gases, liquids and powders. It is also suitable for high temperature and corrosive conditions, increasing the applicability of the device. Compared with existing technologies, the structural design of this application has the following innovative functions; By utilizing a dual-coating structure of tungsten carbide spray coating and polytetrafluoroethylene wrapping, and with the protruding thickness of the skateboard frame 4 precisely matched to the total coating thickness, the contradiction between hard seals being wear-resistant but prone to leakage and soft seals being leak-proof but easily damaged in existing technologies is resolved, achieving dual optimization of wear resistance and sealing.

[0021] By combining the preload compensation of disc spring 10, the auxiliary support of spring 9, and the flexible graphite seal, a continuous preload force is provided to compensate for the wear of the sealing surface. Furthermore, the temperature-resistant and self-lubricating properties of flexible graphite overcome the limitation of traditional disc spring 10 seals, which can only achieve mechanical compensation and cannot adapt to extreme working conditions.

[0022] And through the fan-shaped through hole and the sliding plate frame 4 convex structure integrated molding, flow channel transition is smoother, compared with the existing V-shaped ball valve fold line flow channel or straight through valve sudden contraction flow channel, significantly reduces the resistance loss and blockage risk, while giving the flow channel self-cleaning function.

[0023] Through the combination design of the sealing ring 13 on the plate seat 6, the flange spray coating 601 and the valve cavity 8 inner wall treatment, the medium flow channel and the valve cavity 8 are completely isolated, avoiding the internal component corrosion and blockage problem caused by material entering the valve cavity 8 of the existing valve, especially suitable for easy caking and corrosive material working conditions.

[0024] The coating of the sliding plate frame 4 and the plate seat 6 ensures that the sealing surface is always tightly fitted during sliding, breaking through the sealing failure problem caused by insufficient fitting precision of traditional sliding plate valves.

[0025] The working principle of the above embodiment is: During use, the material leakage problem between the sliding plate 5 and the plate seat 6 during movement can be avoided by the material setting of the sliding plate spray coating 602, the sliding plate wrapping layer 603, the plate seat spray coating 604 and the plate seat wrapping layer 605, ensuring normal material conveying and preventing material from entering the valve cavity 8, ensuring normal use of the device; And the disc spring 10 in the embedded groove 7 and the disc spring gland 11 can ensure the sealing effect of the connection position of the plate seat 6 and the sliding plate 5, and the flexible graphite at the disc spring gland 11 can adapt to high temperature steam, low temperature refrigerant, strong acid and strong alkali solution, organic solvent and other extreme media, avoid the increase of sealing gap caused by deformation of the valve body 1, plate seat 6 and other components, ensure stable performance under frequent temperature fluctuations, ensure the sealing of the connection position, also has excellent temperature resistance and self-lubricating property, and also can ensure the chemical inertness of the connection position, and cooperates with the disc spring 10 to provide initial pre-tightening force and compensate for wear; And the fan-shaped through hole structure of the combination of the slide plate frame 4 and the slide plate 5 can ensure that the fan-shaped hole provides a smooth flow channel transition when conveying materials, the materials can be naturally guided to the narrow outlet along the inclined surface of the fan-shaped hole, the change of the flow direction is more gentle, thereby greatly reducing the dead zone and the risk of blockage, and the taper design of the fan-shaped hole makes the flow cross section of the materials gradually decrease, which can more smoothly convert kinetic energy into pressure energy, thereby reducing the local resistance loss when passing through the hole, achieving the energy saving effect, the taper design of the fan-shaped hole can adapt the valve to different working pressure and flow requirements, when the flow changes, the gradual change characteristics of the flow channel cross section can ensure the stability of the material flow, avoid the pressure fluctuation caused by the sudden change of the flow, at the same time, the high pressure adaptability of the sealing structure makes the valve can be used for high pressure conveying pipeline, without additional pressure reducing and stabilizing device, simplifying the design of the pipeline system, improving the reliability of the overall system.

[0026] The mounting mode, the connecting mode or the setting mode disclosed in the embodiment are common mechanical connecting modes, and as long as the beneficial effects can be achieved, the embodiment can be implemented, in addition, the electrical components appearing in the embodiment are electrically connected with the master controller and the power supply, the master controller can be a conventional known device such as a computer which plays a control role, the person skilled in the art can realize the control of the electrical components through simple programming, and the existing disclosed power connection technology also belongs to the common knowledge in the art, so the specific structure composition and working principle of the embodiment will not be described too much.

Claims

1. Hydraulic controlled fracturing manifold comprising a pipeline (14) and a valve body (1), characterized in that: The top surface of the valve body (1) is provided with a valve stem (2) for connection, and one end of the valve stem (2) is fixedly installed with a fixed pin (3), and the surface of the fixed pin (3) is fixedly installed with a sliding plate frame (4), the inside of the sliding plate frame (4) is fixedly installed with a sliding plate (5), and the inside of the valve body (1) is wrapped with a plate seat (6) on the left and right sides of the sliding plate (5), and the opposite sides of the surface of the plate seat (6) are fixedly installed with a sealing ring (13). The inside of the valve body (1) is provided with an embedded groove (7) on the opposite side of the plate seat (6), and the surface of the plate seat (6) is embedded with a spring (9), and the inner wall of the embedded groove (7) is provided with a disc spring (10), one side of the disc spring (10) is clamped with a disc spring gland (11), and the inner wall of the embedded groove (7) is provided with a disc spring sealing element (12) on one side of the disc spring gland (11), the inside of the valve body (1) is provided with a buffer ring cavity (15) on one side of the embedded groove (7), and a plurality of bevels (16) are provided on the side of the buffer ring cavity (15) away from the sliding plate (5), the inner wall of the buffer ring cavity (15) is slidably installed with a buffer ring pad (17), and a plurality of movable barrels (18) are fixedly installed on one side of the buffer ring cavity (15) away from the sealing ring (13), and the inner wall of the movable barrel (18) is movably installed with an extrusion piston block (19).

2. The hydraulically controlled fracturing manifold of claim 1, wherein: The sliding plate frame (4) is a frame body with holes, and the sliding plate (5) is arranged on the circumferential side of the hole of the sliding plate frame (4).

3. The hydraulically controlled fracturing manifold of claim 2, wherein: The hole of the sliding plate frame (4) is provided in a fan-shaped through hole structure, the opposite ends of the pipeline (14) and the opposite sides of the valve body (1) are fixedly installed with RJ type flanges (1401), and the two corresponding RJ type flanges (1401) are fixedly connected through fastening bolts, the movable barrel (18) extends through the surface of the sealing ring (13), and the buffer ring pad (17) and the plurality of movable barrels (18) are filled with nitrogen.

4. The hydraulically controlled fracturing manifold of claim 1, wherein: The plate seat (6) is a hole plate body structure, and the hole of the plate seat (6) is in communication with the inside of the valve body (1), and the inside of the valve body (1) is coated with a flange spraying layer (601) on one side of the two plate seats (6).

5. The hydraulically controlled fracturing manifold of claim 4, wherein: The material of the flange spraying layer (601) is polytetrafluoroethylene, and the surface of the sliding plate (5) is coated with a sliding plate spraying layer (602), and the surface of the sliding plate spraying layer (602) is coated with a sliding plate wrapping layer (603).

6. The hydraulically controlled fracturing manifold of claim 5, wherein: The hole position of the sliding plate frame (4) is protruding, the thickness of the protrusion is equal to the sum of the thicknesses of the sliding plate spraying layer (602) and the sliding plate wrapping layer (603), and the surface of the sliding plate frame (4) is slidably connected with the surface of the plate seat (6).

7. The hydraulically controlled fracturing manifold of claim 6, wherein: The surface of the plate seat (6) is provided with a plate seat spraying layer (604), and the surface of the plate seat spraying layer (604) is coated with a plate seat wrapping layer (605).

8. The hydraulically controlled fracturing manifold of claim 7, wherein: The materials of the sliding plate spraying layer (602) and the plate seat spraying layer (604) are tungsten carbide, and the materials of the sliding plate wrapping layer (603) and the plate seat wrapping layer (605) are polytetrafluoroethylene.

9. The hydraulically controlled fracturing manifold of claim 1, wherein: The surface of each of the two seatings (6) is fixedly connected with the inside of the valve body (1), and the surface of the seating (6) forms a valve cavity (8) with the inside of the valve body (1).

10. The hydraulically controlled fracturing manifold of claim 1, wherein: The surface of the disc spring seal (12) is connected with the surface of the seating (6) by using flexible graphite.

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