An ultra-high pressure choke manifold

Abstract

The application relates to the technical field of petroleum well manifolds, in particular to an ultrahigh-pressure throttling well killing manifold; the ultrahigh-pressure throttling well killing manifold comprises a well main pipe, an automatic pressure regulator is communicated and arranged on the well main pipe, the automatic pressure regulator is fixed and communicated with a backflow pipeline, the backflow pipeline is communicated and arranged at the tail end of the well main pipe; the upper end of the well main pipe is fixed and communicated with an auxiliary material adding pipeline for adding auxiliary materials; the upper and lower ends of the well main pipe are respectively fixed and communicated with an upper circulating deslagging pipe and a lower circulating deslagging pipe for deslagging; the ultrahigh-pressure throttling well killing manifold has the advantages that the problem that the well mouth pipeline with unstable internal pressure cannot be used is solved by using real-time circulation hedging, and the problem that the unstable well mouth pressure pipeline cannot be adaptively adjusted is solved.

Description

Technical Field

[0001] This invention relates to the field of oil well manifold technology, and more specifically to an ultra-high pressure throttling and kill manifold. Background Technology

[0002] A manifold is an assembly of multiple pipes that converge. It includes gate valves, pipelines, pipe fittings, pressure gauges, and electronic sensors, hydraulic control systems, and other accessories. Existing manifolds typically use throttle valves (such as adjustable flow valves or fixed throttle nozzles) to limit the cross-sectional area of ​​the fluid passage, reducing the flow velocity of high-pressure fluids, thereby controlling wellhead back pressure and preventing blowouts or formation pressure runaway. A similar manifold for preventing blowouts in oil wells, as described in patent number CN202310318183.0, relates to the field of oil well manifold technology. It includes a mounting plate, a blowout prevention manifold body, and a drive buffer mechanism. A bracket is fixedly mounted on the mounting plate, and the blowout prevention manifold body is mounted on the bracket. The drive buffer mechanism is positioned... Below the mounting plate, the drive buffer mechanism can switch between drive and buffer states. In drive state, the drive buffer mechanism can drive the mounting plate to rise and fall, while in buffer state, it can buffer the vertical vibration of the mounting plate. This invention combines the lifting structure and the buffer structure into one, simplifying the complexity of setting two separate structures in the prior art. Furthermore, the spring moves up and down synchronously during the lifting drive. When adjusted to the appropriate height, simply loosen the locking sleeve to reset the spring and switch to the buffer state, making the operation simpler and more convenient. However, this technical solution cannot be used in wellhead pipelines where the internal pressure is unstable, and it cannot adaptively adjust to unstable wellhead pressure pipelines. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the existing technology, which uses real-time cyclic hedging, cannot be applied to wellhead pipelines with unstable internal pressure, and cannot adaptively adjust to unstable wellhead pressure pipelines.

[0004] Therefore, the technical solution adopted is an ultra-high pressure throttling well control manifold of the present invention, including an oil well main pipe, an automatic pressure regulator connected to and provided on the oil well main pipe, the automatic pressure regulator being fixed and connected to a return pipe, the return pipe being connected to and provided at the tail end of the oil well main pipe; an auxiliary material addition pipe for adding auxiliary raw materials being fixed and connected to the upper end of the oil well main pipe; and an upper circulation slag removal pipe and a lower circulation slag removal pipe for slag removal being fixed and connected to the upper and lower ends of the oil well main pipe, respectively.

[0005] Preferably, the oil well main pipe is equipped with a detection joint, an upper circulation joint, a lower circulation joint, and an addition joint, and each of the detection joint, upper circulation joint, lower circulation joint, and addition joint is provided with a sealing ring groove and a sealing ring.

[0006] Preferably, the main oil well pipe is fixed to a fixed base by support rods, and the fixed base is provided with multiple support rods to support the return pipe, auxiliary material addition pipe, upper circulation slag removal pipe and lower circulation slag removal pipe; the fixed base is provided with a slag removal and recovery drain.

[0007] Preferably, the automatic pressure regulator includes a pressure regulating pipe seat, a pressure regulating connector, and a side spring frame. The pressure regulating pipe seat is fixed and connected to the main oil well pipe. The two ends of the pressure regulating pipe seat are respectively connected to the pressure regulating connector and the side spring frame. The pressure regulating connector is sealed to the return pipe. The side spring frame is provided with a counter-flush spring.

[0008] Preferably, the pressure regulating pipe seat has a central seat that is laterally limited and slidably provided inside. The two ends of the central seat are respectively fitted with side sealing rings and counter-sealing sealing rings for sealing and sliding connection at both ends of the pressure regulating pipe seat. The counter-sealing spring is provided between the central seat and the side spring frame. The counter-sealing spring is fitted on the spring limiting shaft, and the spring limiting shaft is fixed to one end of the central seat.

[0009] Preferably, the counter-sealable rubber ring is fitted onto the counter-sealable retaining ring of the center seat to counter-seal the liquid inside the pressure regulating joint.

[0010] Preferably, the center seat has inner arc-shaped recovery grooves at both the upper and lower ends, and the two inner arc-shaped recovery grooves are connected by multiple inner mutual spring grooves; a pressure regulating top is inserted into the inner arc-shaped recovery groove to block the pipeline flow.

[0011] The pressure regulating top platform includes an upper pressure regulating arc-shaped top plate, a lower pressure regulating arc-shaped top plate, and mutually supporting springs. The upper and lower pressure regulating arc-shaped top plates are slidably inserted into each other, and multiple uniformly supporting springs are sleeved between the upper and lower pressure regulating arc-shaped top plates. The pressure regulating arc-shaped top plates and the lower pressure regulating arc-shaped top plates are slidably inserted into two inner arc-shaped recycling troughs, respectively.

[0012] Preferably, the central seat is conical at both ends in the flow direction within the oil well main pipe.

[0013] Preferably, the auxiliary material adding pipeline includes an auxiliary material adding pipe, a branch pipe, and a temporary auxiliary liquid adding pipe. The auxiliary material adding pipe is connected to the branch pipe, and the branch pipe is connected to the temporary auxiliary liquid adding pipe. Multiple valves are provided on both the auxiliary material adding pipe and the branch pipe.

[0014] Preferably, each of the detection joints is sealed with a detection gauge; both the upper and lower circulation joints are connected and equipped with a backflushing slag remover, which contains multiple filter screens inside the pipe and a backflushing pipe; and multiple valves are installed on the return pipe, the upper circulation joint, and the lower circulation joint.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention in a first orientation.

[0019] Figure 2 This is a schematic diagram of the overall second-direction structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the oil well main pipe of the present invention;

[0021] Figure 4 This is a schematic diagram of the connection structure of the return pipe of the present invention;

[0022] Figure 5 This is a schematic diagram of the automatic voltage regulator of the present invention;

[0023] Figure 6 This is a schematic diagram of the internal structure of the automatic voltage regulator of the present invention. Figure 1 ;

[0024] Figure 7 This is a schematic diagram of the internal structure of the automatic voltage regulator of the present invention. Figure 2 ;

[0025] Figure 8 This is a schematic diagram of the pressure regulating top platform of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the auxiliary material addition pipeline of the present invention;

[0027] Figure 10 This is a schematic diagram of the circulating slag removal structure of the present invention.

[0028] In the diagram: 1. Oil well main pipe; 2. Fixed base; 3. Automatic pressure regulator; 4. Return pipe; 5. Auxiliary material addition pipe; 6. Upper circulation slag removal pipe; 7. Lower circulation slag removal pipe; 8. Slag removal and recovery floor drain; 9. Inspection joint; 10. Upper circulation joint; 11. Lower circulation joint; 12. Addition joint; 13. Pressure regulating pipe seat; 14. Pressure regulating joint; 15. Side spring frame; 16. Counter-pressure spring; 17. Center seat; 18. Spring limit shaft; 19. Side sealing ring; 20. Counter-pressure sealing ring; 21. Pressure regulating top platform; 22. Inner arc-shaped recovery groove; 23. Inner mutual-pressure spring groove; 24. Upper pressure regulating arc-shaped top plate; 25. Lower pressure regulating arc-shaped top plate; 26. Mutual-pressure spring; 27. Auxiliary material addition pipe; 28. Branch pipe; 29. ​​Temporary auxiliary fluid addition pipe; 30. Inspection gauge; 31. Backflushing slag remover. Detailed Implementation

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the description of this application, it should be understood that the terms "middle," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Example 1:

[0034] like Figure 1 and Figure 2 As shown, an ultra-high pressure throttling well control manifold includes a main oil well pipe 1, an automatic pressure regulator 3 connected to and installed on the main oil well pipe 1, the automatic pressure regulator 3 fixed and connected to a return pipe 4, the return pipe 4 connected to and installed at the tail end of the main oil well pipe 1; an auxiliary material addition pipe 5 for adding auxiliary raw materials is fixed and connected to the upper end of the main oil well pipe 1; and an upper circulation slag removal pipe 6 and a lower circulation slag removal pipe 7 for slag removal are fixed and connected to the upper and lower ends of the main oil well pipe 1, respectively.

[0035] The working principle and beneficial effects of this embodiment are as follows: The oil well main pipe 1 is sealed and connected to an oilfield pipeline for extraction and transportation. An automatic pressure regulator 3 is connected to and installed on the oil well main pipe 1. Simultaneously, the automatic pressure regulator 3 is fixed and connected to a return pipe 4, allowing liquid flowing under the same pressure to return to the automatic pressure regulator 3 through the return pipe 4. This drives the automatic pressure regulator 3 to adaptively match and regulate the flow rate of the liquid in the oil well main pipe 1. When the pressure is stable, the automatic pressure regulator 3 remains stable; when the pressure suddenly increases, the automatic pressure regulator 3 increases its blocking area. To reduce its internal pressure; if the pressure suddenly decreases, the automatic pressure regulator 3 will reduce the blocking area to increase its internal flow pressure; thus achieving adaptive use; the upper end of the oil well main pipe 1 is fixed and connected to the auxiliary material addition pipe 5 for adding auxiliary materials; through the auxiliary material addition pipe 5, thickeners or diluents and other auxiliary liquid materials are added into the oil well main pipe 1; through the upper and lower ends of the oil well main pipe 1, the upper circulation slag removal pipe 6 and the lower circulation slag removal pipe 7 for slag removal are fixed and connected respectively, thereby isolating and discharging some solid phase impurities that appear inside during the rotation process.

[0036] Example 2:

[0037] like Figure 1 — Figure 10As shown, an ultra-high pressure throttling and kill manifold is provided, wherein the oil well main pipe 1 is connected to a detection connector 9, an upper circulation connector 10, a lower circulation connector 11, and an adder connector 12. Each of the detection connector 9, the upper circulation connector 10, the lower circulation connector 11, and the adder connector 12 is provided with a sealing ring groove and a sealing ring.

[0038] The working principle and beneficial effects of this embodiment are as follows: multiple test connectors 9 are used to connect to test gauges 30, which include test instruments such as pressure gauges and flow meters; upper circulation connector 10 and lower circulation connector 11 are used to connect and communicate with upper circulation slag removal pipe 6 and lower circulation slag removal pipe 7; and addition connector 12 is used to connect and communicate with auxiliary material addition pipe 5.

[0039] Example 3:

[0040] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling well control manifold is provided. The main oil well pipe 1 is fixed to the fixed base 2 by support rods. The fixed base 2 is provided with multiple support rods to support the return pipe 4, the auxiliary material addition pipe 5, the upper circulation slag removal pipe 6, and the lower circulation slag removal pipe 7. The fixed base 2 is provided with a slag removal and recovery drain 8.

[0041] The working principle and beneficial effects of this embodiment are as follows: the oil well main pipe 1 is fixed on the fixed base 2 by a support rod to stabilize it at a specified height for connecting to the pipeline for transportation; the fixed base 2 is provided with multiple support rods to support the return pipe 4, the auxiliary material addition pipe 5, the upper circulation slag removal pipe 6 and the lower circulation slag removal pipe 7, all of which are used to stabilize the transport pipeline and prevent the connection from being unstable due to its own weight; the fixed base 2 is provided with a slag recovery drain 8 to control the valve to discharge the collected and isolated solid impurities.

[0042] Example 4:

[0043] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling and kill manifold includes an automatic pressure regulator 3 comprising a pressure regulating pipe seat 13, a pressure regulating connector 14, and a side spring frame 15. The pressure regulating pipe seat 13 is fixed and connected to the oil well main pipe 1. The two ends of the pressure regulating pipe seat 13 are respectively connected to the pressure regulating connector 14 and the side spring frame 15. The pressure regulating connector 14 is sealed to the return pipe 4. The side spring frame 15 is provided with a counter-flush spring 16.

[0044] The working principle and beneficial effects of this embodiment are as follows: The pressure regulating pipe seat 13 is fixed and connected to the oil well main pipe 1, and acts directly on the oil well main pipe 1 to facilitate direct control of the high-pressure flowing oil in the oil well main pipe 1; the two ends of the pressure regulating pipe seat 13 are respectively connected to the pressure regulating connector 14 and the side spring frame 15. The pressure regulating connector 14 is sealed and connected to the return pipe 4 to guide the pressurized return liquid and provide kinetic energy for the self-adaptive adjustment in the pressure regulating pipe seat 13; the side spring frame 15 is provided with a counter-pressure spring 16; the counter-pressure spring 16 is used to counter-regulate the pressurized return liquid. Depending on the pressure of the application, the counter-pressure spring 16 with different pressure levels is selected for use; thus, different pressure spaces are determined, and the counter-pressure spring 16 with different pressure levels is selected for use.

[0045] Example 5:

[0046] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling and kill manifold includes a central seat 17 laterally slidably positioned within the pressure regulating pipe seat 13. The two ends of the central seat 17 are respectively fitted with side sealing rings 19 and counter-sealable sealing rings 20 for sealing and sliding connection to both ends of the pressure regulating pipe seat 13. A counter-sealable spring 16 is positioned between the central seat 17 and the side spring frame 15. The counter-sealable spring 16 is fitted onto a spring limiting shaft 18, which is fixed to one end of the central seat 17.

[0047] The working principle and beneficial effects of this embodiment are as follows: The pressure regulating pipe seat 13 is laterally limited and slidably provided with a central seat 17. The pressure regulating pipe seat 13 partially blocks the liquid flowing in the oil well main pipe 1, so that it is transported separately.

[0048] The two ends of the center seat 17 are respectively fitted with side sealing rings 19 and counter-sealing rings 20 for sealing the sliding connection at both ends of the pressure regulating pipe seat 13, and for sealing and counter-sealing. The counter-sealing spring 16 is set between the center seat 17 and the side spring frame 15 to counter-suppress the pressure of the return liquid in the return pipe 4 in the pressure regulating joint 14, so as to realize the sliding reciprocating advancement of the center seat 17 at different pressure levels. The counter-sealing spring 16 is fitted on the spring limiting shaft 18, which is fixed to one end of the center seat 17. The spring limiting shaft 18 is used to limit the deformation of the counter-sealing spring 16 and prevent it from shifting during the compression and release of the counter-sealing top.

[0049] Example 6:

[0050] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling and kill manifold is provided, wherein the counter-seal rubber ring 20 is fitted on the counter-seal ring of the center seat 17 to counter-seal the liquid inside the pressure regulating joint 14.

[0051] The working principle and beneficial effects of this embodiment are as follows: The counter-seal rubber ring 20 is sleeved on the counter-seal retaining ring of the center seat 17. The return liquid through the return pipe 4 pressurizes the center seat 17 and its counter-seal retaining ring in the counter-seal pressure regulating joint 14. After the pressure is greater than the pressure of the counter-seal spring 16, the center seat 17 moves inward. The counter-seal rubber ring 20 is sleeved on the counter-seal retaining ring of the center seat 17 to block and seal, preventing leakage.

[0052] Example 7:

[0053] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling manifold has an inner arc-shaped recovery groove 22 at both the upper and lower ends of the center seat 17. The two inner arc-shaped recovery grooves 22 are connected by multiple inner mutual spring grooves 23. A pressure regulating top platform 21 is inserted into the inner arc-shaped recovery groove 22 to block the pipeline flow.

[0054] The pressure regulating top platform 21 includes an upper pressure regulating arc-shaped top plate 24, a lower pressure regulating arc-shaped top plate 25, and mutual pressing springs 26. The upper pressure regulating arc-shaped top plate 24 and the lower pressure regulating arc-shaped top plate 25 are slidably inserted into each other, and multiple uniformly mutually pressing springs 26 are sleeved between the upper pressure regulating arc-shaped top plate 24 and the lower pressure regulating arc-shaped top plate 25. The upper pressure regulating arc-shaped top plate 24 and the lower pressure regulating arc-shaped top plate 25 are slidably inserted into two inner arc-shaped recycling grooves 22 respectively.

[0055] The working principle and beneficial effects of this embodiment are as follows: Both the upper and lower ends of the center of the central seat 17 are provided with inner arc-shaped recovery grooves 22, which are connected by multiple inner mutually abutting spring grooves 23; an upper pressure-adjusting arc-shaped top plate 24 and a lower pressure-adjusting arc-shaped top plate 25 of a pressure-adjusting top platform 21 are inserted into the two inner arc-shaped recovery grooves 22. When the central seat 17 is pushed laterally against the inner walls on both sides of the pressure-adjusting tube seat 13 by the opposing thrust, the upper pressure-adjusting arc-shaped top plate 24 and the lower pressure-adjusting arc-shaped top plate 25 are subjected to symmetrical compression and contract inward. As a result, the area of ​​oil blocking the flow in the main oil pipe 1 decreases, thereby increasing the flow rate in the pipeline and the pressure increases accordingly. When the center seat 17 is pushed laterally towards the center of the pressure regulating pipe seat 13 and the main oil pipe 1 by the counter-impact, the upper pressure regulating arc-shaped top plate 24 and the lower pressure regulating arc-shaped top plate 25 are subjected to the force of multiple mutually opposing springs 26 between them, extending outward. Combined with the characteristics of their arc structure, they are squeezed by the inner wall of the main oil pipe 1, thereby increasing the area of ​​oil blocking the flow in the main oil pipe 1 and thus reducing the flow rate in the pipeline.

[0056] Multiple uniformly mutually supporting springs 26 are sleeved between the upper pressure-adjusting arc-shaped top plate 24 and the lower pressure-adjusting arc-shaped top plate 25; the upper pressure-adjusting arc-shaped top plate 24 and the lower pressure-adjusting arc-shaped top plate 25 are respectively slidably inserted into two inner arc-shaped recycling grooves 22 to limit the displacement of the upper pressure-adjusting arc-shaped top plate 24 and the lower pressure-adjusting arc-shaped top plate 25.

[0057] Example 8:

[0058] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling manifold is provided, wherein the center seat 17 is conical at both ends in the flow direction within the oil well main pipe 1.

[0059] The working principle and beneficial effects of this embodiment are as follows: Both ends of the center seat 17 in the flow direction within the oil well main pipe 1 are conical, which helps to reduce the pressure of the liquid flowing in the pipe on the center seat 17, so as to divert the flow and avoid affecting the counter-current adjustment on both sides of the center seat 17.

[0060] Example 9:

[0061] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling well control manifold includes an auxiliary material addition pipe 5 comprising an auxiliary material addition pipe 27, a branch pipe 28, and a temporary auxiliary fluid addition pipe 29. The auxiliary material addition pipe 27 is connected to the branch pipe 28, and the branch pipe 28 is connected to the temporary auxiliary fluid addition pipe 29. Both the auxiliary material addition pipe 27 and the branch pipe 28 are equipped with multiple valves.

[0062] The working principle and beneficial effects of this embodiment are as follows: A branch pipe 28 is connected to the auxiliary material addition pipe 27, and a temporary auxiliary liquid addition pipe 29 is provided on the branch pipe 28; by controlling the valve, various auxiliary liquids to be temporarily added can be conveniently added into the temporary auxiliary liquid addition pipe 29, and after it is closed, the switch is opened to allow it to flow into the auxiliary material addition pipe 27 and the oil well main pipe 1; multiple valves are provided on both the auxiliary material addition pipe 27 and the branch pipe 28 to facilitate the use control of adjusting the added raw materials.

[0063] Example 10:

[0064] like Figure 1 — Figure 10 As shown, an ultra-high pressure throttling well control manifold is provided, wherein each of the detection joints 9 is sealed with a detection gauge 30; both the upper circulation joint 10 and the lower circulation joint 11 are connected and equipped with a backflushing slag remover 31, which contains multiple filter screens inside the pipe and a backflushing pipe is provided on the backflushing slag remover 31; and multiple valves are provided on the return pipe 4, the upper circulation joint 10, and the lower circulation joint 11.

[0065] The working principle and beneficial effects of this embodiment are as follows: each detection connector 9 is sealed with a detection gauge 30 for observing internal data; both the upper circulation connector 10 and the lower circulation connector 11 are connected and equipped with a backflushing slag remover 31, which has multiple filter screens installed inside the pipe to filter solid impurities in the circulating liquid through multiple screenings; finally, the backflushing pipe on the backflushing slag remover 31 is filled with the corresponding liquid through the control valve, and then discharged through the discharge pipe into the slag recovery drain 8; multiple valves are installed on the return pipe 4, the upper circulation connector 10 and the lower circulation connector 11 to facilitate real-time adjustment and regulation of the pipeline.

[0066] The above description is not intended to limit the present invention, nor is the present invention limited to the examples given above. Any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. An ultra-high pressure kill manifold, characterized by: The utility model provides an oil well main pipe (1) is provided with detection joint (9), upper circulation joint (10), lower circulation joint (11) and addition joint (12) on the upper circulation, detection joint (9), upper circulation joint (10), lower circulation joint (11) and addition joint (12) are all provided with sealing ring groove and sealing ring.

2. An ultra-high pressure kill flowline manifold as defined in claim 1, wherein: The oil well main pipe (1) is fixed on the fixed base (2) through the support rod, and the fixed base (2) is provided with a plurality of support rods for supporting the backflow pipeline (4), the auxiliary material adding pipeline (5), the upper circulating deslagging pipeline (6) and the lower circulating deslagging pipeline (7).

3. An ultra-high pressure kill flowline manifold as defined in claim 2, wherein: The automatic pressure regulator (3) comprises a pressure regulating pipe base (13), a pressure regulating joint (14) and a side spring frame (15), the pressure regulating pipe base (13) is fixed and communicated on the oil well main pipe (1), and the two ends of the pressure regulating pipe base (13) are respectively provided with the pressure regulating joint (14) and the side spring frame (15) in a communication mode, the pressure regulating joint (14) is sealingly connected with the backflow pipeline (4), and the side spring frame (15) is provided with a counter spring (16) therein.

4. An ultra-high pressure kill flowline manifold as defined in claim 1, wherein: The center seat (17) is provided with a side sealing rubber ring (19) and a counter sealing rubber ring (20) on the two ends of the center seat (17) for sealing sliding connection at the two ends of the pressure regulating pipe base (13), the counter spring (16) is arranged between the center seat (17) and the side spring frame (15), the counter spring (16) is sleeved on a spring limiting shaft (18), and the spring limiting shaft (18) is fixed at one end of the center seat (17).

5. An ultra-high pressure kill flowline manifold as defined in claim 4, wherein: The counter sealing rubber ring (20) is sleeved on the counter blocking ring of the center seat (17) for counteracting the liquid in the pressure regulating joint (14).

6. An ultra-high pressure kill flowline manifold as defined in claim 5, wherein: The center of the center seat (17) is provided with an inner arc-shaped recovery groove (22) at the upper end and the lower end, the two inner arc-shaped recovery grooves (22) are communicated through a plurality of inner mutual top spring grooves (23), and the pressure regulating top table (21) is inserted and arranged in the inner arc-shaped recovery groove (22) for blocking the pipeline flow.

7. An ultra-high pressure kill flowline manifold as defined in claim 5, wherein: The pressure regulating top table (21) comprises an upper pressure regulating arc-shaped top plate (24), a lower pressure regulating arc-shaped top plate (25) and a mutual top spring (26), the upper pressure regulating arc-shaped top plate (24) and the lower pressure regulating arc-shaped top plate (25) are slidably inserted into each other, a plurality of uniform mutual top springs (26) are sleeved between the upper pressure regulating arc-shaped top plate (24) and the lower pressure regulating arc-shaped top plate (25), and the upper pressure regulating arc-shaped top plate (24) and the lower pressure regulating arc-shaped top plate (25) are slidably inserted into the two inner arc-shaped recovery grooves (22) respectively. ​ 8. An ultra-high pressure kill flowline manifold as defined in claim 5, wherein: The center seat (17) is conical at both ends in the flow direction of the oil well main pipe (1).

9. An ultra-high pressure kill flowline manifold as defined in claim 1, wherein: The auxiliary material adding pipeline (5) comprises an auxiliary material adding pipe (27), a branch pipe (28) and a temporary auxiliary liquid adding pipe (29), the branch pipe (28) is communicated and arranged on the auxiliary material adding pipe (27), and the temporary auxiliary liquid adding pipe (29) is arranged on the branch pipe (28); a plurality of valves are arranged on the auxiliary material adding pipe (27) and the branch pipe (28).

10. An ultra-high pressure kill flowline manifold as defined in claim 2, wherein: The detection joint (9) is sealingly connected with a detection table (30); the upper circulating joint (10) and the lower circulating joint (11) are both communicated with and provided with backflushing slag removers (31), a plurality of filter screens are arranged in the pipeline in the backflushing slag removers (31), and the backflushing slag removers (31) are provided with backflushing pipelines; a plurality of valves are arranged on the backflow pipeline (4), the upper circulating joint (10) and the lower circulating joint (11).

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