Pressure control throttling manifold with built-in filter screen

Abstract

The application relates to the technical field of oil and gas exploitation, in particular to an inner filter screen pressure control throttling manifold. The throttling manifold comprises an entering channel, a first connecting channel communicated with the entering channel, a second connecting channel connected with the first connecting channel, and a discharging channel connected with the second connecting channel; a first branch and a second branch are arranged between the first connecting channel and the second connecting channel; a detection branch is arranged between the second connecting channel and the discharging channel; a first automatic valve is arranged between the first connecting channel and the second connecting channel; a first combined valve is arranged on the first branch; a second combined valve is arranged on the second branch; the throttling manifold integrates the filtering, pressure control and throttling functions, has a compact U-shaped structure layout, can significantly reduce the occupied area of the equipment, and can have five medium flow paths and can be adjusted in the face of various working conditions.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, and in particular to a built-in filter pressure control and throttling manifold. Background Technology

[0002] In oil and gas extraction operations, choke manifolds are core equipment for controlling drilling pressure and venting well kicks, and their performance directly affects operational safety and efficiency.

[0003] Traditional throttling manifolds mainly consist of components such as hydraulic throttling valves, manual gate valves, pipelines, and pressure gauges. Wellhead pressure control is achieved by adjusting the opening of the throttling valve.

[0004] However, existing technologies have the following significant drawbacks: impurity blockage, insufficient pressure control accuracy, inability to measure, and limited data acquisition.

[0005] To address the aforementioned issues, there is an urgent need to develop a new type of throttling manifold that integrates filtration, pressure control, and throttling functions, is compact in structure, resistant to clogging, and easy to maintain, in order to meet the operational needs of high-pressure sand-bearing oil and gas wells.

[0006] To address this, a built-in filter-controlled pressure throttling manifold is proposed. Summary of the Invention

[0007] Therefore, the technical problem to be solved by this invention is to develop a new type of throttling manifold that integrates filtration, pressure control, and throttling functions, is compact in structure, anti-clogging, and easy to maintain, so as to meet the operational needs of high-pressure sand-bearing oil and gas wells.

[0008] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a built-in filter pressure-controlled throttling manifold, including an inlet channel and a first connecting channel connected to the inlet channel. A second connecting channel is connected to the first connecting channel, and an outlet channel is connected to the second connecting channel. A first branch and a second branch are provided between the first connecting channel and the second connecting channel. It also includes a detection branch located between the second connecting channel and the outlet channel. A first automatic valve is provided between the first connecting channel and the second connecting channel. A first combined valve is provided on the first branch. A second combined valve is provided on the second branch. A second automatic valve and a third automatic valve are provided on the second connecting channel. The second automatic valve is connected to the outlet channel, and the third automatic valve is connected to the starting end of the detection branch.

[0009] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the detection branch includes a flow meter, a communicating vessel, and a third manual valve connected in sequence.

[0010] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the starting end of the flow meter is provided with a first connector; the third manual valve is provided with a second connector; both the first connector and the second connector are connected to the second connection channel.

[0011] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the second automatic valve is connected to the discharge channel via a second connector; the third automatic valve is connected to the starting end of the flow meter via a first connector.

[0012] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the first branch includes a first connecting pipe and a first adapter disposed on the first connecting pipe; the first connecting pipe is connected to a first connecting channel through a first combination valve.

[0013] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the first adapter is provided with a first manual valve; the first adapter is connected through the first manual valve and the second connection channel; the first combined valve includes a fourth automatic valve and a first throttling valve connected to each other.

[0014] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the second branch includes a second connecting pipe and a second adapter disposed on the second connecting pipe; the second connecting pipe is connected to the first connecting channel through a second combination valve.

[0015] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: the second adapter is provided with a second manual valve; the second adapter is connected through the second manual valve and the second connection channel; the second combined valve includes a fifth automatic valve and a second throttling valve connected in series.

[0016] In a preferred embodiment of the built-in filter pressure control manifold of the present invention, a filter mechanism is further provided in the first connection channel; the filter mechanism includes a filter screen and through holes provided on the filter screen.

[0017] In a preferred embodiment of the built-in filter pressure control throttling manifold of the present invention: a sealing end is provided on the first connecting channel, and a limiting groove is provided in the first connecting channel; a pull handle is provided on the filter screen, and a positioning groove is provided at the end of the filter screen; a snap-fit ​​strip is also provided in the limiting groove and the positioning groove.

[0018] The beneficial effects of this invention are as follows: This throttling manifold integrates filtration, pressure control, and throttling functions, and its U-shaped structure is compact, which can significantly reduce the area occupied by the equipment. In addition, this throttling manifold can accommodate five different media flow paths, which can be adjusted to meet various working conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0020] Figure 1 The diagram shows the overall structure of the built-in filter pressure control throttling manifold from a first top view angle.

[0021] Figure 2 A schematic diagram of the overall structure of the built-in filter pressure control throttling manifold relative to the first top view angle is shown.

[0022] Figure 3 A structural schematic diagram of the built-in filter pressure control throttling manifold is shown from a bottom view.

[0023] Figure 4 A schematic diagram of the first connection channel of the built-in filter pressure control throttling manifold is shown.

[0024] Figure 5 A schematic diagram of the internal structure of the first connection channel of the built-in filter pressure control throttling manifold is shown.

[0025] Figure 6 A schematic diagram of the overall structure of the filtration mechanism with a built-in filter pressure control throttling manifold is shown.

[0026] Figure 7 A cross-sectional schematic diagram of a filtration mechanism with a built-in filter pressure control throttling manifold is shown.

[0027] Figure 8 A cross-sectional schematic diagram of the first connection channel of the built-in filter pressure control throttling manifold is shown.

[0028] Figure 9 A schematic diagram of the first working path of the built-in filter pressure control throttling manifold is shown.

[0029] Figure 10 A schematic diagram of the second working path of the built-in filter pressure control throttling manifold is shown.

[0030] Figure 11 A schematic diagram of the third working path of the built-in filter pressure control throttling manifold is shown.

[0031] Figure 12 A schematic diagram of the fourth working path of the built-in filter pressure control throttling manifold is shown.

[0032] Figure 13 A schematic diagram of the fifth working path of the built-in filter pressure control throttling manifold is shown.

[0033] In the diagram: 1. Inlet channel; 2. First connecting channel; 21. First automatic valve; 22. Sealing end; 23. First opening; 24. Second opening; 25. Third opening; 26. Limiting groove; 27. Inner expansion cavity; 3. Second connecting channel; 31. Second automatic valve; 32. Third automatic valve; 4. Discharge channel; 5. First branch; 51. First combination valve; 511. Fourth automatic valve; 512. First throttle valve; 52. First connecting pipe; 53. First adapter. 531. First manual valve; 6. Second branch; 61. Second combination valve; 611. Fifth automatic valve; 612. Second throttle valve; 62. Second connecting pipe; 63. Second adapter; 631. Second manual valve; 7. Detection branch; 71. Flow meter; 711. First connector; 72. Communicating device; 73. Third manual valve; 731. Second connector; 8. Filter mechanism; 81. Filter screen; 82. Through hole; 83. Pull handle; 84. Positioning groove; 9. Snap-fit ​​strip. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0036] Reference Figures 1-3 This embodiment provides a built-in filter pressure control and throttling manifold, including an inlet channel 1 and a first connecting channel 2 connected to the inlet channel 1. A second connecting channel 3 is connected to the first connecting channel 2, and a discharge channel 4 is connected to the second connecting channel 3. The medium in the mining process enters from the inlet channel 1 and is finally discharged from the discharge channel 4.

[0037] A first branch 5 and a second branch 6 are provided between the first connecting channel 2 and the second connecting channel 3; wherein, the first branch 5 is used to connect the first connecting channel 2 and the second connecting channel 3, and the second branch 6 is used to connect the first connecting channel 2 and the second connecting channel 3.

[0038] It also includes a detection branch 7 located between the second connecting channel 3 and the discharge channel 4; the detection branch 7 is used to detect the flow rate of the medium and to measure the flow of the medium.

[0039] A first automatic valve 21 is provided between the first connecting channel 2 and the second connecting channel 3; it should be noted that the first connecting channel 2 and the second connecting channel 3 are connected by the first automatic valve 21.

[0040] The first branch 5 is equipped with a first combination valve 51; the first combination valve 51 can control the opening and closing of the first branch 5.

[0041] The second branch 6 is equipped with a second combination valve 61; the second combination valve 61 can control the opening and closing of the second branch 6.

[0042] The first combination valve 51 and the second combination valve 61 can be used for flow regulation.

[0043] The second connection channel 3 is equipped with a second automatic valve 31 and a third automatic valve 32; wherein, the second automatic valve 31 is connected to the discharge channel 4, and the third automatic valve 32 is connected to the starting end of the detection branch 7.

[0044] For example, refer to Figure 9 This is the first flow path for the medium. When the downhole pressure is too high, it is necessary to release pressure by venting. The first combination valve 51 and the second combination valve 61 are closed, the first automatic valve 21 and the second automatic valve 31 are opened, and the third automatic valve 32 is closed. At this time, the medium enters from the inlet channel 1, flows through the first connecting channel 2 and then through the first automatic valve 21, then enters the second connecting channel 3, passes through the second automatic valve 31, and finally exits from the outlet channel 4. During this process, the medium is in a direct discharge state with the maximum flow rate, which can achieve rapid pressure relief operation.

[0045] For example, refer to Figure 10 This is the second flow path for the medium. During normal operation, the first combination valve 51 is in the open state, the second combination valve 61 is in the closed state, the first automatic valve 21 is closed, the third automatic valve 32 is closed, and the second automatic valve 31 is open. At this time, the downhole medium will enter from the inlet channel 1, flow through the first branch 5 and enter the second connecting channel 3, then flow into the second automatic valve 31, and finally be discharged from the outlet channel 4.

[0046] For example, refer to Figure 11 This is the third flow path for the medium. This path is a backup path and is usually switched when the first branch 5 needs maintenance. It can also achieve normal operation. At this time, the second combination valve 61 is in the open state, the first combination valve 51 is in the closed state, the first automatic valve 21 is closed, the third automatic valve 32 is closed, and the second automatic valve 31 is open. The downhole medium will enter from the inlet channel 1, flow through the second branch 6 and enter the second connecting channel 3, then flow into the second automatic valve 31, and finally be discharged from the outlet channel 4.

[0047] For example, refer to Figure 12 This is the fourth flow path of the medium. The fourth flow path will pass through the detection branch 7, which can measure the flow rate of the internal medium. When the state of the internal medium meets the measurement conditions, the internal medium can be measured during normal operation. At this time, the first automatic valve 21 is closed, the second automatic valve 31 is closed, the third automatic valve 32 is open, the first combination valve 51 on the first branch 5 is closed, and the second combination valve 61 on the second branch 6 is open. The medium enters the first connecting channel 2 from the inlet channel 1, flows through the second branch 6 and enters the second connecting channel 3, then flows into the detection branch 7 and is discharged from the outlet channel 4.

[0048] For example, refer to Figure 13 This is the fifth flow path for the medium. The fifth flow path also passes through the detection branch 7. The difference between this and the fourth flow path is that the first combination valve 51 on the first branch 5 is open, and the second combination valve 61 on the second branch 6 is closed. The medium will flow through the first branch 5.

[0049] In summary, the throttling manifold of the present invention has five flow paths, which can meet five working scenarios. When the downhole pressure is high, the first flow path is used. During normal operation, one of the second or third flow paths is used as the main working path, and the other path is used as a maintenance backup path. Similarly, when the medium is in good condition and the flow rate can be measured, it can switch to the fourth or fifth flow path for operation.

[0050] It should be noted that the first automatic valve 21, the second automatic valve 31, and the third automatic valve 32 are all electric flat valves.

[0051] For example, refer to Figures 1-3 The detection branch 7 includes a flow meter 71, a communicating vessel 72, and a third manual valve 73 connected in sequence.

[0052] Specifically, the flow meter 71 is provided with a first connector 711 at its starting end; the third manual valve 73 is provided with a second connector 731; both the first connector 711 and the second connector 731 are connected to the second connection channel 3.

[0053] Among them, the flow meter 71, the communicating vessel 72, and the third manual valve 73 are arranged in a U-shaped structure.

[0054] Preferably, the second automatic valve 31 is connected to the discharge channel 4 via the second connector 731; the third automatic valve 32 is connected to the starting end of the flow meter 71 via the first connector 711.

[0055] After the third automatic valve 32 is closed, the medium inside the second connecting channel 3 will not be able to enter the first connector 711. This prevents the medium from flowing into the flow meter 71 and causing damage to the flow meter 71 when the medium does not meet the conditions for measuring the flow rate. The flow meter 71 can be started as needed. At the same time, the third manual valve 73 can be manually closed by the operator. After the third manual valve 73 is manually closed, it can form a secondary protection for the flow meter 71. In addition, when the third manual valve 73 and the third automatic valve 32 are both closed, maintenance personnel can disassemble and maintain the communicating vessel 72, the flow meter 71, and the first connector 711.

[0056] Furthermore, the first branch 5 includes a first connecting pipe 52 and a first adapter 53 disposed on the first connecting pipe 52; the first connecting pipe 52 is connected to the first connecting channel 2 through a first combination valve 51.

[0057] The first combination valve 51, the first connecting pipe 52, and the first adapter 53 are arranged in a U-shape. The first adapter 53 is equipped with a pressure sensor to detect the pressure of the medium flowing through the first adapter 53.

[0058] The first adapter 53 is provided with a first manual valve 531; the first adapter 53 is connected to the second connection channel 3 through the first manual valve 531; the first manual valve 531 is provided so that the operator can manually close it, thereby closing the first branch 5.

[0059] The first combination valve 51 includes a fourth automatic valve 511 and a first throttle valve 512 connected to each other.

[0060] Among them, the fourth automatic valve 511 is used to control the opening and closing of the first branch 5, the first throttle valve 512 is used to realize throttling during the mining process, and the fourth automatic valve 511 is an electric flat plate valve.

[0061] Furthermore, the second branch 6 includes a second connecting pipe 62 and a second adapter 63 disposed on the second connecting pipe 62; the second connecting pipe 62 is connected to the first connecting channel 2 through a second combination valve 61, wherein the second combination valve 61, the second connecting pipe 62, and the second adapter 63 are arranged in a U-shaped structure, and a pressure sensor is provided on the second adapter 63 for detecting the pressure of the medium flowing through the second adapter 63.

[0062] Preferably, the second adapter 63 is provided with a second manual valve 631; the second adapter 63 is connected to the second connection channel 3 through the second manual valve 631; the second manual valve 631 is used by the operator to manually control the opening and closing of the second branch 6.

[0063] The second combination valve 61 includes a fifth automatic valve 611 and a second throttle valve 612 connected to each other. The fifth automatic valve 611 is used to control the automatic opening and closing of the second branch 6, and the second throttle valve 612 is used to achieve throttling during the mining process. The fifth automatic valve 611 is an electric flat plate valve.

[0064] It should be noted that, referring to Figures 10-13 During normal mining operations, one of the following flow paths is typically used: the second, third, fourth, or fifth flow path. These flow paths share a common characteristic: the medium is prone to causing wear on the structure at the corners where it flows. For example, the first adapter 53 and the second adapter 63 are easily damaged by the erosion of the medium. Therefore, replacement and maintenance are required at these locations. By switching the first branch 5 to repair the second adapter 63 of the second branch 6, or by switching the second branch 6 to repair the first adapter 53 of the first branch 5, the throttling manifold can be maintained without shutting down the machine.

[0065] Reference Figures 1-8 As an optional embodiment, it also includes a filter mechanism 8 disposed in the first connecting channel 2; the filter mechanism 8 is used to filter the medium flowing into the first connecting channel 2 from the inlet channel 1.

[0066] The filtration mechanism 8 includes a filter screen 81 and a through hole 82 provided on the filter screen 81, wherein the filter screen 81 has a barrel-shaped structure and the through hole 82 is provided through the filter screen 81.

[0067] It should be noted that the first connecting channel 2 is provided with a sealing end 22 and a limiting groove 26 is provided inside the first connecting channel 2; the sealing end 22 is connected to both ends of the first connecting channel 2 by bolts, and the limiting groove 26 is provided at the end of the first connecting channel 2.

[0068] The first connecting channel 2 has a first opening 23, a second opening 24, and a third opening 25. The first opening 23 is connected to the first combination valve 51, the second opening 24 is connected to the second combination valve 61, and the third opening 25 is connected to the first automatic valve 21.

[0069] The end of the filter screen 81 is chamfered, and the first connecting channel 2 is used to place the filter screen 81. The interior is provided with an inner expansion cavity 27, which facilitates the insertion and removal of the filter screen 81.

[0070] Specifically, after the filter screen 81 is inserted into the inner expansion cavity 27, an appropriate gap is maintained between the outer wall of the filter screen 81 and the inner wall of the inner expansion cavity 27. The setting of this gap reduces the sliding friction resistance of the filter screen 81 during insertion and removal, which can avoid the difficulty of disassembly caused by impurities getting stuck and blocked. When the operator pushes or pulls the filter screen 81 in or out by pulling the handle 83, it is easier and smoother, avoiding the jamming phenomenon caused by the outer wall of the filter screen 81 directly contacting the inner wall of the first connecting channel 2.

[0071] The filter screen 81 is provided with a handle 83 and a positioning groove 84 at the end of the filter screen 81; after the filter screen 81 is inserted into the inner expansion cavity 27, the positioning groove 84 and the limiting groove 26 are aligned.

[0072] Furthermore, it also includes a snap-fit ​​strip 9 provided in the limiting groove 26 and the positioning groove 84. The snap-fit ​​strip 9 can be used to position the filter screen 81.

[0073] The filter mechanism 8 is located in the first connecting channel 2 and upstream of the first branch 5, the second branch 6 and the first automatic valve 21. That is, the filtration operation is completed before the media is diverted. In this layout, the media is filtered by the filter screen 81 before entering each branch and the throttle valve. This avoids the untreated media carrying solid particles such as sand and gravel from directly scouring the valve core and valve seat sealing surfaces of the first throttle valve 512 and the second throttle valve 612. This effectively extends the service life of the throttle valves and also reduces the abrasive damage of particulate matter to the inner walls of the first connecting channel 2, the second connecting channel 3 and each connecting pipe. This reduces the frequency of pipeline replacement and thus increases the service life of the entire manifold under sandy conditions.

[0074] When the filter screen 81 needs to be disassembled and cleaned, open the sealing end 22, then take out the snap-fit ​​strip 9, pull out the filter screen 81 through the pull handle 83, clean the filter screen 81, and after cleaning, insert the filter screen 81 into the inner expansion cavity 27. Use the snap-fit ​​strip 9 to simultaneously lock the positioning groove 84 and the limiting groove 26, thereby achieving the positioning of the filter screen 81, so that the through hole 82 is aligned with the third opening 25.

[0075] Reference Figure 9 When rapid pressure relief is required under high pressure conditions underground, the medium does not need to be filtered by the filter screen 81 and passes directly through the through hole 82 to achieve rapid discharge and pressure relief.

[0076] In this embodiment, the filter screen 81 adopts a barrel-shaped structure with through holes 82. The circumferential sides of the barrel-shaped filter screen 81 all participate in filtration. Compared with a planar filter screen, its filtration area is increased several times, which significantly reduces the flow velocity of the medium per unit filtration area under the same flow conditions. This reduces the erosion of the filter screen 81 pore walls and inner walls by high-speed fluid carrying sand particles, and extends the service life of the filter screen 81 itself. In addition, the hollow cavity inside the filter screen 81 cooperates with the inner cavity of the first connecting channel 2. During the filtration process, solid particles such as sand particles can be temporarily stored in the hollow cavity, avoiding the rapid accumulation of particles on the surface of the filter screen 81 and causing large-area blockage of the through holes 82. This extends the single-use time of the filter screen 81 and reduces the number of downtime maintenance caused by frequent disassembly and cleaning.

[0077] The through-hole 82, penetrating the filter screen 81, forms a complete fluid channel. This through-hole structure serves two flow functions under different operating conditions: During normal operation, fluid enters the filter screen 81 directly through the through-hole 82, and solid particles are trapped inside the filter screen 81, achieving filtration. When the downhole pressure is too high and rapid depressurization is required, fluid passes directly through the through-hole 82. Unlike normal operation, the fluid flow rate and velocity are extremely high during depressurization, and solid particles are flushed out by the high-speed fluid before they can settle. In this case, the through-hole 82 is only used as a high-flow-rate channel, and the filter screen 81 does not perform a filtration function. Furthermore, when the manifold switches to the first flow path for venting and depressurization, the high-pressure downhole medium flows through at a velocity much greater than that during normal operation. The filter screen 81 has through holes 82. According to Bernoulli's principle, when the fluid velocity increases, its static pressure decreases. The high-speed jet forms a local low-pressure zone in the wall thickness channel of the through hole 82 and on the outlet side, causing the solid particles originally attached to the surface of the filter screen 81 to be peeled off under the action of pressure difference and carried away by the high-speed fluid. This achieves the self-cleaning function of the filter screen 81, so that each blowout operation is actually an online flushing of the filter screen 81. This can effectively reduce the long-term accumulation of solid particles on the surface of the filter screen 81 and delay the clogging process of the filter screen 81. Without the need to introduce additional cleaning fluid or disassemble the filter screen 81, the filter screen 81 is self-cleaned by the high-pressure fluid in the well, which further extends the cleaning and maintenance cycle of the filter screen 81.

[0078] Reference Figures 10-13 During normal operation, the flow path of the medium is one of the second, third, fourth, or fifth flow paths. In this case, the medium flow will be filtered through filter screen 81 to prevent the equipment from being blocked by impurities.

[0079] Preferably, the first combination valve 51, the first connecting channel 2, and the second combination valve 61 are arranged in a U-shape; the first combination valve 51, the first connecting pipe 52, and the first adapter 53 are arranged in a U-shape; the second combination valve 61, the second connecting pipe 62, and the second adapter 63 are arranged in a U-shape; the second connecting channel 3, the second manual valve 631, the second adapter 63, and the first manual valve 531 and the first adapter 53 are arranged in a U-shape; the second adapter 63, the second manual valve 631, the third automatic valve 32, the first connector 711, and the flow meter 71 are arranged in a U-shape; The meter 71, the connector 72, and the third manual valve 73 are arranged in a U-shape. By setting multiple U-shaped structures, the vertical space is fully utilized, avoiding the disadvantage of the large-area extension of pipelines in the horizontal plane in traditional manifolds. This significantly reduces the lateral dimensions of the entire manifold and makes the structure more compact. Through the three-dimensional layout, the overall volume and weight of this throttling manifold are effectively controlled while meeting the requirements of multi-functional integration, which facilitates transportation and installation. During on-site installation, it is only necessary to connect the inlet channel 1 and the outlet channel 4 to place it in place, reducing the on-site installation workload and space requirements.

[0080] In summary, this manifold integrates filtration, pressure control, and throttling functions. Its compact U-shaped structure significantly reduces the equipment's footprint. Furthermore, this manifold can accommodate five different media flow paths, allowing for adjustments to various operating conditions.

[0081] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A built-in filter pressure-controlled throttling manifold, characterized in that: It includes an inlet channel (1) and a first connecting channel (2) connected to the inlet channel (1), a second connecting channel (3) connected to the first connecting channel (2), and an outlet channel (4) connected to the second connecting channel (3). A first branch (5) and a second branch (6) are provided between the first connecting channel (2) and the second connecting channel (3); It also includes a detection branch (7) located between the second connection channel (3) and the discharge channel (4); A first automatic valve (21) is provided between the first connecting channel (2) and the second connecting channel (3); The first branch (5) is equipped with a first combination valve (51); The second branch (6) is equipped with a second combination valve (61); The second connection channel (3) is provided with a second automatic valve (31) and a third automatic valve (32); The second automatic valve (31) is connected to the discharge channel (4), and the third automatic valve (32) is connected to the starting end of the detection branch (7); It also includes a filter mechanism (8) disposed in the first connection channel (2).

2. The built-in filter pressure control and throttling manifold according to claim 1, characterized in that: The detection branch (7) includes a flow meter (71), a communicating vessel (72), and a third manual valve (73) connected in sequence.

3. The built-in filter pressure control and throttling manifold according to claim 2, characterized in that: The flow meter (71) is provided with a first connector (711) at its starting end. The third manual valve (73) is provided with a second connector (731); Both the first connector (711) and the second connector (731) are connected to the second connection channel (3).

4. The built-in filter pressure control manifold according to claim 3, characterized in that: The second automatic valve (31) is connected to the discharge channel (4) via a second connector (731); The third automatic valve (32) is connected to the starting end of the flow meter (71) via the first connector (711).

5. A built-in filter pressure-controlled throttling manifold according to any one of claims 1 to 4, characterized in that: The first branch (5) includes a first connecting pipe (52) and a first adapter (53) disposed on the first connecting pipe (52); The first connecting pipe (52) is connected to the first connecting channel (2) through the first combination valve (51).

6. The built-in filter pressure control and throttling manifold according to claim 5, characterized in that: The first adapter (53) is equipped with a first manual valve (531); The first adapter (53) is connected via a first manual valve (531) and a second connection channel (3); The first combination valve (51) includes a fourth automatic valve (511) and a first throttle valve (512) connected to each other.

7. A built-in filter pressure-controlled throttling manifold according to any one of claims 1 to 4, characterized in that: The second branch (6) includes a second connecting pipe (62) and a second adapter (63) disposed on the second connecting pipe (62); The second connecting pipe (62) is connected to the first connecting channel (2) through the second combination valve (61).

8. A built-in filter pressure control and throttling manifold according to claim 7, characterized in that: The second adapter (63) is equipped with a second manual valve (631). The second adapter (63) is connected via the second manual valve (631) and the second connection channel (3); The second combination valve (61) includes a fifth automatic valve (611) and a second throttle valve (612) connected in series.

9. A built-in filter pressure-controlled throttling manifold according to any one of claims 1 to 4, characterized in that: The filtration mechanism (8) includes a filter screen (81) and through holes (82) provided on the filter screen (81). The first connecting channel (2) is used to place the filter screen (81) and has an internal expansion cavity (27).

10. A built-in filter pressure-controlled throttling manifold according to claim 9, characterized in that: The first connecting channel (2) is provided with a sealing end (22), and the first connecting channel (2) is provided with a limiting groove (26); The filter screen (81) is provided with a handle (83), and the end of the filter screen (81) is provided with a positioning groove (84). It also includes a snap-fit ​​strip (9) disposed in the limiting groove (26) and the positioning groove (84).

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