175mpa superhigh pressure erosion-resistant killing well manifold with sand prevention structure

Abstract

The application discloses a 175MPa superhigh-pressure erosion-resistant throttling well killing manifold with a sand prevention structure, which comprises a sand prevention assembly, the sand prevention assembly is connected to a pipeline, and the sand prevention assembly is connected with a sand collecting and pressure releasing bin, the sand prevention assembly comprises a sand prevention net, the sand prevention net is arranged in the pipeline, and a net cleaning assembly is arranged at the sand prevention net, and when the sand prevention net is blocked, the net cleaning assembly can scrape the blocking matter on the sand prevention net and remove the blocking matter into the sand collecting and pressure releasing bin. The sand prevention assembly is arranged, sand and stones in the manifold are intercepted through the sand prevention net, formation sand particles are prevented from entering the inside of the manifold, the erosion of key components such as valves and throttling openings is reduced, and the service life of the manifold is prolonged; and the sand prevention assembly is connected with the sand collecting and pressure releasing bin, when the pressure of the manifold exceeds the safety limit, pressure relief can be performed at the sand prevention assembly, the flow liquid in the manifold is temporarily discharged into the sand collecting and pressure releasing bin, the pressure of the manifold is reduced, and safety is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of well killing manifold, in particular to a 175MPa superhigh pressure erosion-resistant throttling well killing manifold with sand prevention structure. BACKGROUND

[0002] In the production operation process of oil and gas wells in oilfields, in order to prevent the occurrence of well kick, blowout and other sudden accidents, and to realize effective control of the pressure of oil and gas wells, a throttling well killing manifold must be provided.

[0003] The main function of the well killing manifold is to control well kick and blowout by using mud, which is specifically manifested as follows: first, when the full seal gate plate closes the wellhead, heavy mud is forcedly pumped into the wellbore through the well killing manifold to implement well killing operation; second, when blowout occurs, clean water is forcedly injected into the wellhead through the well killing manifold to prevent burning; third, when the well is on fire, fire extinguishing agent is forcedly injected into the wellbore through the well killing manifold to help extinguish the fire.

[0004] During the operation of the well killing manifold, formation sand particles are easy to enter the inside of the manifold, causing erosion to the key components such as valves and throttling ports, thereby reducing the service life of the manifold and causing safety accidents. SUMMARY

[0005] The present application provides a 175MPa superhigh pressure erosion-resistant throttling well killing manifold with sand prevention structure to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme:

[0007] A 175MPa superhigh pressure erosion-resistant throttling well killing manifold with sand prevention structure, comprising a sand prevention assembly, the sand prevention assembly is connected in the pipeline, and the sand prevention assembly is connected with a sand collecting and pressure releasing bin, the sand prevention assembly comprises a sand prevention net, the sand prevention net is arranged in the pipeline, a net cleaning assembly is arranged at the sand prevention net, and the net cleaning assembly can scrape the blockage on the sand prevention net and remove it into the sand collecting and pressure releasing bin when the sand prevention net is blocked.

[0008] Preferably, the sand prevention net is in the shape of a pipe net, one end of the sand prevention net is fixedly connected with an inlet pipe, the inlet pipe is connected with an inlet end, the other end of the sand prevention net is fixedly connected with a sand discharge pipe, the sand discharge pipe is connected with the sand collecting and pressure releasing bin through a sand discharge end, a flow converging cover is arranged on the periphery of the sand prevention net, and the flow converging cover is fixedly connected with the sand discharge pipes and the inlet pipe at both ends of the sand prevention net, an outlet pipe is connected with the flow converging cover, and the outlet pipe is connected with an outlet end.

[0009] Preferably, a backflow pipeline is arranged between the sand collecting and pressure releasing bin and the outlet end, and a one-way valve is arranged on the backflow pipeline.

[0010] Preferably, the screen cleaning assembly comprises a sand removal bowl, which is slidingly connected to the inner wall of the sand prevention screen, and the sand removal bowl is attached to the inner wall of the sand prevention screen;

[0011] The sand removal bowl is fixedly connected to a sand removal frame, a first limiting ring is fixedly connected to the sand removal frame, one end of a first spring is sleeved with the first limiting ring, and the other end of the first spring is connected to a clamping groove, which is fixedly connected to the inner wall of the sand removal pipe.

[0012] Preferably, a pressure relief port is arranged at the center of the sand removal bowl, a pressure relief core is slidingly connected to the pressure relief port, and a second spring is arranged between the pressure relief core and the sand removal frame.

[0013] Preferably, a second limiting ring is fixedly connected to the sand removal frame, the pressure relief core is slidingly connected to the second limiting ring, one end of the second spring is sleeved with the second limiting ring, and the other end of the second spring is fixedly connected to the pressure relief core.

[0014] A first sealing ring is arranged at the abutting position of the pressure relief core and the pressure relief port, and the first sealing ring is fixedly connected to the sand removal bowl.

[0015] Preferably, a sand cleaning and maintenance opening is arranged on the sand collecting and pressure relief bin, the sand cleaning and maintenance opening comprises a fixed tube fixedly connected to the sand collecting and pressure relief bin, and a cover plate is arranged on the upper side of the fixed tube.

[0016] A fixed plate is arranged on the outer periphery of the cover plate, and a second positioning plate is fixedly connected to the fixed plate.

[0017] A first positioning plate is fixedly connected to the fixed tube, a positioning rod is rotatably connected to the first positioning plate, and the first positioning plate and the second positioning plate are rotatably connected through the positioning rod.

[0018] Preferably, a first buckle and a second clamping block are arranged on the fixed tube, and the first buckle and the second clamping block are respectively located on different half sides of the fixed tube.

[0019] A first clamping block and a second buckle are arranged on the fixed plate, and the first clamping block and the second buckle are respectively located on different half sides of the fixed plate.

[0020] The first buckle and the second buckle are in L shape.

[0021] The second clamping block can be clamped in the second buckle, and the first clamping block can be clamped in the first buckle.

[0022] Preferably, a second sealing ring is arranged between the fixed tube and the fixed plate, and the second sealing ring is fixedly connected to the fixed tube.

[0023] The second sealing ring is hollow inside, an inflation tube is arranged on the second sealing ring, and a valve is arranged on the inflation tube.

[0024] Preferably, a limiting tube is fixedly connected on the fixed tube, a limiting pin is arranged in the limiting tube, the limiting pin is elastically and slidably connected to the limiting tube, and a hole corresponding to the limiting pin is arranged on the fixed plate.

[0025] Compared with the prior art, the present application has at least the following beneficial effects:

[0026] The sand prevention assembly is arranged, sand and stones in the manifold are intercepted by the sand prevention net, formation sand particles are prevented from entering the inside of the manifold, erosion of key components such as valves and throttling openings is reduced, and the service life of the manifold is improved.

[0027] The sand prevention assembly is connected with the sand collecting and pressure relief bin, when the pressure of the manifold exceeds a safety limit, pressure relief can be performed at the sand prevention assembly, the flow liquid in the manifold is temporarily discharged to the sand collecting and pressure relief bin, the pressure of the manifold is reduced, and safety is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the present application;

[0029] Figure 2 It is a schematic diagram of the structure of the sand prevention assembly of the present application;

[0030] Figure 3 It is a schematic diagram of the connection structure of the pressure relief core of the present application;

[0031] Figure 4 It is an exploded view of the sand cleaning and overhauling opening structure of the present application;

[0032] Figure 5 It is a schematic diagram of the cover plate structure of the present application;

[0033] Figure 6 It is a schematic diagram of the fixed tube structure of the present application.

[0034] In the figure: 1, sand prevention assembly; 2, inlet end; 3, outlet end; 4, sand discharging end; 5, sand collecting and pressure relief bin; 6, sand cleaning and overhauling opening; 7, one-way valve; 8, backflow pipeline; 9, sand discharging pipe; 10, clamping groove; 11, first spring; 12, sand removing frame; 13, first limiting ring; 14, second spring; 15, sand prevention net; 16, pressure relief opening; 17, sand removing bowl; 18, inlet pipe; 19, flow converging cover; 20, outlet pipe; 21, pressure relief core; 22, second limiting ring; 25, first sealing ring; 26, fixed tube; 27, first clasp; 28, first positioning plate; 29, limiting tube; 30, limiting pin; 31, positioning rod; 32, second sealing ring; 33, cover plate; 34, fixed plate; 35, second positioning plate; 36, handle; 37, first clamping block; 38, second clasp; 39, second clamping block; 40, inflation pipe. DETAILED DESCRIPTION

[0035] In the present application, the description such as "first", "second" and the like is only for the purpose of description, and is not intended to particularly indicate the order or sequence, nor to limit the present application, which is merely to distinguish the protective assembly or operation described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0036] Embodiment 1:

[0037] Please refer to Figure 1 A 175MPa superhigh pressure erosion-resistant killing well manifold with sand prevention structure, comprising a sand prevention assembly 1, the sand prevention assembly 1 is connected in the pipeline, and the sand prevention assembly 1 is connected with a sand collecting and pressure relief bin 5, the sand prevention assembly 1 comprises a sand prevention net 15, the sand prevention net 15 is arranged in the pipeline, and a net cleaning assembly is arranged at the sand prevention net 15, which can scrape the blockage on the sand prevention net 15 into the sand collecting and pressure relief bin 5 when the sand prevention net 15 is blocked.

[0038] The working principle and beneficial effects of the above scheme are as follows:

[0039] The sand prevention assembly 1 is arranged in the present application, the sand prevention net 15 is used to intercept the sand and stones in the manifold, so that the formation sand particles can be prevented from entering the inside of the manifold, the erosion of the key components such as valves and throttling ports is reduced, and the service life of the manifold is improved.

[0040] The sand prevention assembly 1 is connected with the sand collecting and pressure relief bin 5, when the pressure of the manifold exceeds the safety limit, the sand prevention assembly 1 can be relieved, the flow liquid in the manifold is temporarily discharged to the sand collecting and pressure relief bin 5, the pressure of the manifold is reduced, and the safety is ensured.

[0041] Embodiment 2:

[0042] Please refer to Figures 1-3 On the basis of embodiment 1, the sand prevention net 15 is in the shape of a pipe net, one end of the sand prevention net 15 is fixedly connected with an inlet pipe 18, the inlet pipe 18 is connected with an inlet end 2, the other end of the sand prevention net 15 is fixedly connected with a sand discharging pipe 9, the sand discharging pipe 9 is connected with the sand collecting and pressure relief bin 5 through a sand discharging end 4, a flow converging cover 19 is arranged on the outer periphery of the sand prevention net 15, and the flow converging cover 19 is fixedly connected with the sand discharging pipe 9 and the inlet pipe 18 located at both ends of the sand prevention net 15, an outlet pipe 20 is connected with the flow converging cover 19, and the outlet pipe 20 is connected with an outlet end 3.

[0043] The working principle and beneficial effects of the above scheme are as follows:

[0044] The flowing liquid entering the inlet end 2 of the inlet pipe 18 will pass through the sand prevention net 15 to intercept the sand in the flowing liquid, thereby avoiding the sand from entering the rear-end manifold and eroding the key components such as the valve and the throttle;

[0045] The flowing liquid passing through the sand prevention net 15 is collected in the flow cone 19 and then enters the rear-end pipeline through the outlet pipe 20, and the diffusion buffer cavity is formed between the sand prevention net 15 and the flow cone 19, which can effectively prevent erosion.

[0046] The sand prevention net 15 is arranged in a pipe net structure in the same direction as the inlet pipe 18, so that the entering sand will not directly impact the sand prevention net 15, thereby effectively reducing the wear of the sand prevention net 15.

[0047] Embodiment 3:

[0048] Please refer to Figures 1-3 On the basis of the embodiment 1, the backflow pipeline 8 is arranged between the sand collection and pressure relief bin 5 and the outlet end 3, and the one-way valve 7 is arranged on the backflow pipeline 8.

[0049] The sand removal assembly comprises the sand removal bowl 17 which is slidingly connected to the inner wall of the sand prevention net 15, and the sand removal bowl 17 is attached to the inner wall of the sand prevention net 15.

[0050] The sand removal bowl 17 is fixedly connected to the sand removal frame 12, the first limiting ring 13 is fixedly connected to the sand removal frame 12, one end of the first spring 11 is sleeved with the first limiting ring 13, the other end of the first spring 11 is connected to the clamping groove 10, and the clamping groove 10 is fixedly connected to the inner wall of the sand discharge pipe 9.

[0051] The pressure relief port 16 is arranged at the center of the sand removal bowl 17, the pressure relief core 21 is slidingly connected to the pressure relief port 16, and the second spring 14 is arranged between the pressure relief core 21 and the sand removal frame 12.

[0052] The second limiting ring 22 is fixedly connected to the sand removal frame 12, the pressure relief core 21 is slidingly connected to the second limiting ring 22, one end of the second spring 14 is sleeved with the second limiting ring 22, and the other end of the second spring 14 is fixedly connected to the pressure relief core 21.

[0053] The first sealing ring 25 is arranged at the abutting position of the pressure relief core 21 and the pressure relief port 16, and the first sealing ring 25 is fixedly connected to the sand removal bowl 17.

[0054] The working principle and beneficial effects of the above scheme are as follows:

[0055] As sand and gravel in the flowing liquid are continuously intercepted by the sand-proof net 15, the sand and gravel will become clogged on the sand-proof net 15, causing the pressure inside the sand-proof net 15 to increase continuously. This will push the sand removal bowl 17 to move towards the sand discharge pipe 9, compress the first spring 11, and increase the exposure area of ​​the sand-proof net 15 to ensure the passage of the flowing liquid. When the sand removal bowl 17 moves to the limit position, the exposure area of ​​the sand-proof net 15 can no longer increase, but the continuously increasing flowing liquid will squeeze the pressure relief core 21, compress the second spring 14, open the pressure relief port 16, and the flowing liquid will carry the sand and gravel from the pressure relief port 16 to the sand collection and pressure relief chamber 5. When the pressure inside the sand-proof net 15 decreases, the first spring 11 rebounds, driving the sand removal bowl 17 to move and scrape the inside of the sand-proof net 15, causing the sand and gravel remaining on the sand-proof net 15 to fall off, further ensuring the interception effect of the sand-proof net 15.

[0056] The sandproof net 15 is automatically cleaned by the cleaning component, which greatly reduces the frequency of replacement and maintenance of the sandproof net 15 and reduces maintenance costs.

[0057] Furthermore, when the pressure inside the sandproof mesh 15 is too high and the sandproof mesh 15 is not completely blocked, the pressure relief port 16 will still open under pressure to relieve pressure and reduce safety hazards.

[0058] Example 4:

[0059] Please refer to Figures 4-6 Based on Example 1, the sand collection and pressure relief chamber 5 is provided with a sand cleaning and maintenance port 6. The sand cleaning and maintenance port 6 includes a fixed pipe 26 fixedly connected to the sand collection and pressure relief chamber 5, and a cover plate 33 is provided on the upper side of the fixed pipe 26.

[0060] A fixing plate 34 is provided on the outer periphery of the cover plate 33, and a second positioning plate 35 is fixedly connected to the fixing plate 34;

[0061] A first positioning plate 28 is fixedly connected to the fixed tube 26, and a positioning rod 31 is rotatably connected to the first positioning plate 28. The first positioning plate 28 and the second positioning plate 35 are rotatably connected through the positioning rod 31.

[0062] The fixing tube 26 is provided with a first buckle 27 and a second buckle block 39, and the first buckle 27 and the second buckle block 39 are respectively located on different halves of the fixing tube 26;

[0063] The fixing plate 34 is provided with a first locking block 37 and a second locking buckle 38, and the first locking block 37 and the second locking buckle 38 are respectively located on different halves of the fixing plate 34;

[0064] The first buckle 27 and the second buckle 38 are L-shaped;

[0065] The second clamping block 39 can be clamped in the second clamping buckle 38, and the first clamping block 37 can be clamped in the first clamping buckle 27.

[0066] The second sealing ring 32 is internally hollow, and the second sealing ring 32 is provided with an inflation pipe 40, and the inflation pipe 40 is provided with a valve.

[0067] The second sealing ring 32 is internally hollow, and the second sealing ring 32 is provided with an inflation pipe 40, and the inflation pipe 40 is provided with a valve.

[0068] The limiting pipe 29 is fixedly connected to the fixed pipe 26, the limiting pipe 29 is provided with a limiting pin 30, the limiting pin 30 is elastically and slidingly connected to the limiting pipe 29, and the fixed plate 34 is provided with a hole corresponding to the limiting pin 30.

[0069] The working principle and beneficial effects of the above scheme are as follows:

[0070] The cover plate 33 of the sand cleaning maintenance opening 6 is rotationally connected to the fixed pipe 26 through the positioning rod 31, the positioning rod 31 bears the gravity of the cover plate 33, so that when the cover plate 33 is large and heavy, the cover plate 33 can also be easily opened (only the sliding resistance of the cover plate 33 and the positioning rod 31 needs to be overcome when opening the cover plate 33, and a bearing can be further arranged between the two to further reduce the friction) ;

[0071] When the cover plate 33 is closed, the cover plate 33 is rotated around the positioning rod 31, the first clamping block 37 on the cover plate 33 moves into the first clamping buckle 27, and the bent end of the second clamping buckle 38 is clamped on the second clamping block 39, thereby completing the closure of the cover plate 33.

[0072] By inflating the hollow second sealing ring 32, the second sealing ring 32 is expanded, the sealing effect of the cover plate 33 and the fixed pipe 26 is enhanced, and the deformed positioning rod 31 is avoided under the long-term static load.

[0073] The arrangement of the limiting pin 30 can accurately align the cover plate 33 and the fixed pipe 26.

[0074] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A 175MPa super-high pressure erosion-resistant kill manifold with sand prevention structure, characterized in that, a sand prevention assembly is connected in a pipeline and connected with a sand collecting and pressure releasing chamber, the sand prevention assembly comprises a sand prevention net arranged in the pipeline, and a net cleaning assembly is arranged at the sand prevention net to scrape the blockage on the sand prevention net into the sand collecting and pressure releasing chamber when the sand prevention net is blocked; the sand prevention net is in a tubular net shape, one end of the sand prevention net is fixedly connected with an inlet pipe connected with an inlet end, and the other end of the sand prevention net is fixedly connected with a sand discharge pipe connected with the sand collecting and pressure releasing chamber through a sand discharge end, a flow converging cover is arranged on the outer periphery of the sand prevention net and fixedly connected with the sand discharge pipes and the inlet pipe at both ends of the sand prevention net, and an outlet pipe connected with an outlet end is arranged on the flow converging cover; a backflow pipeline is arranged between the sand collecting and pressure releasing chamber and the outlet end, and a one-way valve is arranged on the backflow pipeline; the net cleaning assembly comprises a sand removing bowl which is slidingly connected with the inner wall of the sand prevention net and abuts against the inner wall of the sand prevention net; the sand removing bowl is fixedly connected with a sand removing frame, a first limiting ring is fixedly connected to the sand removing frame, one end of a first spring is sleeved with the first limiting ring, and the other end of the first spring is connected in a clamping groove fixedly connected to the inner wall of the sand discharge pipe; a pressure releasing opening is arranged at the center of the sand removing bowl, and a pressure releasing core is slidingly connected with the pressure releasing opening, and a second spring is arranged between the pressure releasing core and the sand removing frame; when the pressure in the sand prevention net continuously increases, the sand removing bowl is pushed to move towards the sand discharge pipe, the first spring is compressed, and the exposed area of the sand prevention net is increased. 2.A 175MPa super-high pressure erosion-resistant kill manifold with sand prevention structure according to claim 1, characterized in that, a second limiting ring is fixedly connected to the sand removing frame, the pressure releasing core is slidingly connected with the second limiting ring, one end of the second spring is sleeved with the second limiting ring, and the other end of the second spring is fixedly connected with the pressure releasing core; a first sealing ring is arranged at the abutting position of the pressure releasing core and the pressure releasing opening, and the first sealing ring is fixedly connected to the sand removing bowl. 3.A 175MPa super-high pressure erosion-resistant kill manifold with sand prevention structure according to claim 1, characterized in that, a sand cleaning and maintenance opening is arranged on the sand collecting and pressure releasing chamber, the sand cleaning and maintenance opening comprises a fixed pipe fixedly connected with the sand collecting and pressure releasing chamber, and a cover plate is arranged on the upper side of the fixed pipe; a fixed plate is arranged on the outer periphery of the cover plate, and a second positioning plate is fixedly connected to the fixed plate; a first positioning plate is fixedly connected to the fixed pipe, a positioning rod is rotatably connected to the first positioning plate, and the first positioning plate and the second positioning plate are rotatably connected through the positioning rod. 4.A 175MPa super-high pressure erosion-resistant kill manifold with sand prevention structure according to claim 3, characterized in that, a first clasp and a second clamping block are arranged on the fixed pipe, and the first clasp and the second clamping block are respectively arranged on different half sides of the fixed pipe; a first clamping block and a second clasp are arranged on the fixed plate, and the first clamping block and the second clasp are respectively arranged on different half sides of the fixed plate; the first clasp and the second clasp are in an L shape; the second clamping block can be clamped in the second clasp, and the first clamping block can be clamped in the first clasp. ​ 5. The 175MPa super-high pressure erosion-resistant killing well manifold with sand prevention structure according to claim 3, characterized in that, A second sealing ring is arranged between the fixed pipe and the fixed plate, and the second sealing ring is fixedly connected with the fixed pipe; The second sealing ring is internally hollow, and an inflation pipe is arranged on the second sealing ring, and a valve is arranged on the inflation pipe.

6. The 175MPa super-high pressure erosion-resistant killing well manifold with sand prevention structure according to claim 3, characterized in that, A limiting pipe is fixedly connected on the fixed pipe, a limiting pin is arranged in the limiting pipe, the limiting pin is elastically and slidingly connected with the limiting pipe, and a plug hole corresponding to the limiting pin is arranged on the fixed plate.

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