Throttling kill manifold with sand prevention structure

Abstract

The invention relates to the technical field of throttling kill manifolds, and particularly discloses a throttling kill manifold with a sand prevention structure, which comprises a liquid inlet pipe and a liquid outlet pipe, a sand setting pipe is fixedly mounted at one end of the liquid inlet pipe, a butt joint pipe is fixedly mounted at one end of the liquid outlet pipe, and an operation pipe is fixedly mounted at one end, away from the liquid outlet pipe, of the butt joint pipe. The device is connected into the throttling kill manifold, after liquid enters the liquid inlet pipe, due to the fact that the sand setting pipe is arranged in an inclined mode, gravel with large gravity can be settled in the sand setting pipe inclining downwards, then the liquid can flow into the operation pipe, the sand setting pipe is arranged in an inclined mode, and the operation pipe is connected with the sand setting pipe in an inclined mode. When the liquid flows into the operation pipe, some small gravels flow into the operation pipe along with the liquid and are prevented from entering the operation pipe under the blocking of the sand blocking plate and the arc-shaped plate, the filter screen filters the smaller small gravels which follow the liquid again, the sand prevention effect is further improved, and erosion of the gravels to the manifold and the throttling valve is avoided.

Description

Technical Field

[0001] This invention relates to the field of choke and kill manifold technology, specifically a choke and kill manifold with a sand control structure. Background Technology

[0002] Choke and kill manifolds are a crucial piece of equipment in oil and gas extraction and well control processes. Currently, choke manifolds are used in hydraulic jet perforation. After hydraulic jet perforation and fracturing, during the venting process, the casing fluid carries perforation sand. The high-speed flow of perforation sand severely erodes the manifold and choke valve, quickly damaging the equipment due to friction and impact. As a result, operations must be stopped for repairs or replacements. Frequent repairs are not only time-consuming and labor-intensive, increasing extraction costs, but also result in low work efficiency.

[0003] Chinese patent CN 116696270 B discloses a sand-controlling and throttling manifold that increases the diameter of the sand-sinking pipe, for example, twice the diameter of the throttling valve. This reduces the flow rate of the backflow fluid by four times, significantly decreasing the sand-carrying capacity of the backflow fluid. The perforated sand flows downward and remains inside the sand-sinking pipe. By combining a sand-sinking piston and a sand-discharging piston, the perforated sand can be automatically discharged from the sand-sinking pipe without manual operation. This reduces labor costs and enables safe sand discharge at atmospheric pressure, allowing the well-controlling and throttling manifold to operate continuously.

[0004] However, in the above scheme, by setting up a sand-proof mechanism between the inlet pipe and the outlet pipe, and setting up an inclined sand-falling pipe on one side of the connecting pipe B, and setting up a complex sand-discharging structure at the bottom of the sand-falling pipe, the complex structure is prone to damage during long-term use. In addition, there is no sand-blocking structure between the connecting pipe B and the sand-falling pipe, which may allow sand to enter the connecting pipe B with the fluid, causing the sand to erode the manifold and throttle valve. Summary of the Invention

[0005] The purpose of this invention is to provide a throttling and kill manifold with a sand-control structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a choke and kill manifold with a sand-prevention structure, comprising: an inlet pipe and an outlet pipe, a sand-sinking pipe fixedly installed at one end of the inlet pipe, a connecting pipe fixedly installed at one end of the outlet pipe, an operating pipe fixedly installed at the end of the connecting pipe away from the outlet pipe, an operating pipe fixedly connected at the end of the operating pipe away from the connecting pipe to the outer wall of the sand-sinking pipe and communicating with the inner end of the sand-sinking pipe, an upwardly inclined sand baffle fixedly installed at the lower end of the connection between the operating pipe and the sand-sinking pipe, and a filter screen detachably installed at the inner end of the operating pipe, the filter screen being located inside the sand baffle. A sand outlet pipe is vertically fixed at the lower end of the sand settling pipe. A sealing cap is threaded to the end of the sand outlet pipe away from the sand settling pipe. A sand outlet is provided at the connection between the sand outlet pipe and the sand settling pipe. A piston is movably installed on the inner side of the lower end of the sand settling pipe.

[0007] Preferably, the inlet pipe and the sedimentation pipe are fixed and connected, and the two ends of the connecting pipe are fixed and connected to the operating pipe and the outlet pipe, respectively.

[0008] Preferably, the end of the sand baffle away from the sand settling pipe is inclined upward, and the front and rear ends of the sand baffle are respectively fixed to the inner walls of the front and rear ends of the operating pipe, and an arc-shaped plate is fixedly installed on the upper end of the sand baffle.

[0009] Preferably, the upper end of the operating tube has an insertion interface, which is connected to the inner end of the operating tube. Ear plates are fixedly installed on the outer walls of both the front and rear ends of the operating tube, with the two ear plates located at the front and rear ends of the insertion interface, respectively.

[0010] Preferably, the filter screen has a rectangular frame, the lower end of the filter screen is inserted into the insertion interface, the lower end of the filter screen frame is in contact with the bottom end of the operating tube, the front and rear ends of the frame are in contact with the inner walls of the front and rear ends of the operating tube, the upper end of the frame is located inside the insertion interface, and a fixing plate is fixedly installed on the upper end of the frame.

[0011] Preferably, a sealing gasket is fixedly installed at the lower end of the fixing plate, and the front and rear ends of the fixing plate are located directly above the two ear plates and are fixed to the ear plates by bolts. At this time, the sealing gasket is tightly attached to the upper end of the operating tube to seal the insertion interface.

[0012] Preferably, a sealing plate is bolted to the lower end of the sedimentation pipe. The diameter of the sealing plate is larger than that of the sedimentation pipe. A limiting ring is fixedly installed on the inner side of the lower end of the sedimentation pipe. The limiting ring is located below the sand outlet. A fixing ring is fixedly installed on the outer side of the lower end of the sedimentation pipe. Several fixing holes are opened at the outer end of the fixing ring and the outer end of the sealing plate. One end of the bolt passes through the fixing holes on the fixing ring and the sealing plate in sequence and is threaded with a nut.

[0013] Preferably, a second sealing ring and a plug ring are fixedly installed on the inner end of the sealing plate, the plug ring is located inside the second sealing ring, and a first sealing ring is fixedly installed on the outer end of the plug ring.

[0014] Preferably, when the insertion ring is slidably inserted into the inner side of the lower end of the sand settling pipe, the first sealing ring and the limiting ring are in contact, while the second sealing ring is in contact with the side wall of the lower end of the sand settling pipe.

[0015] Preferably, a threaded cylinder is fixedly installed in the middle part of the sealing plate. The threaded cylinder penetrates the side wall of the sealing plate. A threaded rod is threadedly connected inside the threaded cylinder. One end of the threaded rod passes through the threaded cylinder and is rotatably connected to one end of the piston through a bearing. The piston contacts the inner wall of the sand settling pipe. The end of the threaded rod away from the piston is located at the outer end of the threaded cylinder and is fixedly installed with a drive rod. By rotating the threaded rod, the piston can be driven to the upper side of the sand outlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention connects the device to the choke and kill manifold. After the liquid enters the inlet pipe, due to the inclined design of the sand settling pipe, larger sand and gravel will settle in the downward-sloping sand settling pipe. Then the liquid flows into the operating pipe, and some smaller sand and gravel will flow into the operating pipe along with the liquid. They are prevented from entering the operating pipe by the sand baffle and the arc plate. The filter screen further filters the smaller sand and gravel that are in the liquid, further improving the sand control effect and preventing sand and gravel from eroding the manifold and choke valve. Attached Figure Description

[0017] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear side of the overall structure of the present invention; Figure 3 This is a schematic diagram of the filter screen and piston of the present invention. Figure 4 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 5 For the present invention Figure 2 Enlarged view of the structure of region A in the middle; Figure 6 This is a schematic diagram of the filter structure of the present invention; Figure 7 For the present invention Figure 4 Enlarged view of the structure of region B in the middle.

[0018] In the diagram: 1. Inlet pipe; 2. Outlet pipe; 3. Connecting pipe; 4. Operating pipe; 5. Sand settling pipe; 6. Insertion port; 7. Sand baffle plate; 8. Fixing plate; 9. Filter screen; 10. Sealing gasket; 11. Ear plate; 12. Sand outlet pipe; 13. Threaded groove; 14. Sealing cap; 15. Fixing ring; 16. Sealing plate; 17. Threaded cylinder; 18. Fixing hole; 19. Limiting ring; 20. Insertion ring; 21. Sealing ring one; 22. Sealing ring two; 23. Threaded rod; 24. Drive rod; 25. Piston; 26. Sand outlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0020] Please see Figures 1-7 This invention provides a technical solution: a throttling and kill manifold with a sand-control structure, comprising: an inlet pipe 1 and an outlet pipe 2. Liquid enters through the inlet pipe 1 and exits through the outlet pipe 2. A sand-collecting pipe 5 is fixedly installed at one end of the inlet pipe 1, with the end of the sand-collecting pipe 5 away from the inlet pipe 1 inclined downwards. A connecting pipe 3 is fixedly installed at one end of the outlet pipe 2, with an operating pipe 4 fixedly installed at the end of the connecting pipe 3 away from the outlet pipe 2. The end of the operating pipe 4 away from the connecting pipe 3 is fixedly connected to the outer wall of the sand-collecting pipe 5 and communicates with the inner end of the sand-collecting pipe 5. The inlet pipe 1 and the sand-collecting pipe 5 are fixed and connected. Both ends of the connecting pipe 3 are fixed and connected to the operating pipe 4 and the outlet pipe 2, respectively. The lower end of the connection between the operating pipe 4 and the sand-collecting pipe 5 is fixed. An upwardly inclined sand baffle 7 is installed, with the end of the sand baffle 7 away from the sand settling pipe 5 tilting upwards. The front and rear ends of the sand baffle 7 are fixed to the inner walls of the front and rear ends of the operating pipe 4, respectively. An arc-shaped plate is fixedly installed at the upper end of the sand baffle 7, which increases the sand-blocking capacity of the sand baffle 7. After the liquid enters the inlet pipe 1, due to the inclined setting of the sand settling pipe 5, the sand with greater gravity will settle in the downwardly inclined sand settling pipe 5. Then the liquid will flow into the operating pipe 4, and some small sand will flow into the operating pipe 4 along with the liquid. Under the obstruction of the sand baffle 7 and the arc-shaped plate, it is prevented from entering the operating pipe 4. The liquid that enters the operating pipe 4 enters the connecting pipe 3 and is finally discharged through the outlet pipe 2, which improves the sand prevention effect.

[0021] A filter screen 9 is detachably installed at the inner end of the operating pipe 4. The filter screen 9 is located inside the sand baffle 7. The filter screen 9 further filters smaller sand particles that are carried in the liquid, further improving the sand prevention effect and preventing sand particles from eroding the manifold and throttle valve. An insertion port 6 is provided on one side of the upper end of the operating pipe 4. The insertion port 6 is connected to the inner end of the operating pipe 4. The size of the insertion port 6 is larger than the size of the filter screen 9, allowing the filter screen 9 to be inserted into or pulled out of the operating pipe 4 through the insertion port 6. Two strip-shaped blocks are fixedly installed on the inner wall of the bottom end of the operating pipe 4. The strip-shaped blocks are located directly below the insertion port 6 and limit the lower end of the filter screen 9. Ear plates 11 are fixedly installed on the outer walls of both the front and rear ends of the operating pipe 4. Plate 11 is located at the front and rear ends of the insertion port 6. The frame of the filter screen 9 is rectangular. The lower end of the filter screen 9 is inserted into the insertion port 6. The lower end of the frame of the filter screen 9 contacts the bottom end of the operating tube 4 and is located inside the two strip blocks. The front and rear ends of the frame contact the inner walls of the front and rear ends of the operating tube 4. The upper end of the frame is located inside the insertion port 6, thus fixing the filter screen 9. A fixing plate 8 is fixedly installed on the upper end of the frame. A sealing gasket 10 is fixedly installed on the lower end of the fixing plate 8. The front and rear ends of the fixing plate 8 are located directly above the two ear plates 11 and are fixed to the ear plates 11 with bolts. At this time, the sealing gasket 10 is tightly attached to the upper end of the operating tube 4 to seal the insertion port 6. The filter screen 9 filters the fine sand and gravel inside the flowing liquid.

[0022] A sand outlet pipe 12 is vertically fixed at the lower end of the sand settling pipe 5. A sealing cap 14 is threadedly connected to the end of the sand outlet pipe 12 away from the sand settling pipe 5. A threaded groove 13 is opened on the outer wall of the lower end of the sand outlet pipe 12. The sealing cap 14 is threadedly connected to the lower end of the sand outlet pipe 12 through the threaded groove 13 to seal the lower end of the sand outlet pipe 12. A sand outlet 26 is provided at the connection between the sand outlet pipe 12 and the sand settling pipe 5. The sand and gravel in the sand settling pipe 5 can enter the sand outlet pipe 12 through the sand outlet 26. The sand and gravel can be taken out by opening the sealing cap 14.

[0023] A piston 25 is movably installed on the inner side of the lower end of the sand settling pipe 5. A sealing plate 16 is bolted to the lower end of the sand settling pipe 5. The diameter of the sealing plate 16 is larger than the diameter of the sand settling pipe 5. A limit ring 19 is fixedly installed on the inner side of the lower end of the sand settling pipe 5. The limit ring 19 is located below the sand outlet 26. A fixing ring 15 is fixedly installed on the outer side of the lower end of the sand settling pipe 5. Several fixing holes 18 are opened at the outer end of the fixing ring 15 and the outer end of the sealing plate 16. A sealing ring is fixedly installed on the inner end of the sealing plate 16. The second sealing ring 22 and the plug ring 20 are located inside the second sealing ring 22. The outer end of the plug ring 20 is fixedly installed with the first sealing ring 21. When the plug ring 20 slides into the inner side of the lower end of the sand settling pipe 5, the first sealing ring 21 contacts the limiting ring 19, and at the same time, the second sealing ring 22 contacts the lower port side wall of the sand settling pipe 5. One end of the bolt passes through the fixing hole 18 on the fixing ring 15 and the sealing plate 16 in sequence and is threaded with a nut to seal and fix the sealing plate 16 to the lower end of the sand settling pipe 5.

[0024] A threaded cylinder 17 is fixedly installed in the middle of the sealing plate 16. The threaded cylinder 17 penetrates the side wall of the sealing plate 16. A threaded rod 23 is threadedly connected inside the threaded cylinder 17. One end of the threaded rod 23 passes through the threaded cylinder 17 and is rotatably connected to one end of the piston 25 through a bearing. The piston 25 contacts the inner wall of the sand discharge pipe 5. The end of the threaded rod 23 away from the piston 25 is located at the outer end of the threaded cylinder 17 and is fixedly installed with a drive rod 24. By rotating the threaded rod 23, the piston 25 can be driven to the upper side of the sand outlet 26. When sand needs to be removed, the drive rod 24 is rotated, and the drive rod 24 drives the threaded rod 23 to rotate. The threaded rod 23 pushes the piston 25 to move. The piston 25 moves to the front end of the sand outlet 26, which can block the sand outlet 26. The sand and gravel in the sand discharge pipe 12 can be removed by opening the sealing cover 14.

[0025] In actual use, by connecting this device to the choke and kill manifold, after the liquid enters the inlet pipe 1, due to the inclined setting of the sand settling pipe 5, the larger sand and gravel will settle in the downward inclined sand settling pipe 5. Then the liquid will flow into the operating pipe 4. Some small sand and gravel will flow into the operating pipe 4 along with the liquid. Under the obstruction of the sand baffle 7 and the arc plate, they are prevented from entering the operating pipe 4. The filter screen 9 filters the smaller sand and gravel that are following in the liquid again, further improving the sand prevention effect and preventing sand and gravel from eroding the manifold and choke valve. The sand and gravel that enter the sand settling pipe 5 slowly enter the sand outlet pipe 12 under the action of gravity. When sand needs to be removed, by rotating the drive rod 24, the drive rod 24 drives the threaded rod 23 to rotate. The threaded rod 23 pushes the piston 25 to move. The piston 25 moves to the front end of the sand outlet 26, which can block the sand outlet 26. The sand and gravel in the sand outlet pipe 12 can be removed by opening the sealing cover 14.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A choke and kill manifold with a sand-control structure, comprising: The inlet pipe (1) and outlet pipe (2) are provided. A sand settling pipe (5) is fixedly installed at one end of the inlet pipe (1), and a connecting pipe (3) is fixedly installed at one end of the outlet pipe (2). The characteristic feature is that an operating pipe (4) is fixedly installed at the end of the connecting pipe (3) away from the outlet pipe (2). The end of the operating pipe (4) away from the connecting pipe (3) is fixedly connected to the outer wall of the sand settling pipe (5) and communicates with the inner end of the sand settling pipe (5). An upwardly inclined baffle plate (7) is fixedly installed at the lower end of the connection between the operating pipe (4) and the sand settling pipe (5). A filter screen (9) is detachably installed at the inner end of the operating pipe (4). The filter screen (9) is located inside the baffle plate (7). A sand outlet pipe (12) is vertically fixed at the lower end of the sand discharge pipe (5). A sealing cap (14) is threaded to the end of the sand outlet pipe (12) away from the sand discharge pipe (5). A sand outlet (26) is provided at the connection between the sand outlet pipe (12) and the sand discharge pipe (5). A piston (25) is movably installed on the inner side of the lower end of the sand discharge pipe (5).

2. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The inlet pipe (1) and the sedimentation pipe (5) are fixed and connected, and the two ends of the connecting pipe (3) are fixed and connected to the operating pipe (4) and the outlet pipe (2) respectively.

3. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The sand baffle (7) is inclined upward at the end away from the sand settling pipe (5). The front and rear ends of the sand baffle (7) are respectively fixed on the inner walls of the front and rear ends of the operating pipe (4). An arc-shaped plate is fixedly installed on the upper end of the sand baffle (7).

4. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The upper end of the operating tube (4) is provided with a plug-in interface (6), which is connected to the inner end of the operating tube (4). Ear plates (11) are fixedly installed on the outer walls of the front and rear ends of the operating tube (4), and the two ear plates (11) are located at the front and rear ends of the plug-in interface (6) respectively.

5. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The filter (9) has a rectangular frame. The lower end of the filter (9) is inserted into the insertion interface (6). The lower end of the filter (9) frame is in contact with the bottom end of the operating tube (4). The front and rear ends of the frame are in contact with the inner walls of the front and rear ends of the operating tube (4). The upper end of the frame is located inside the insertion interface (6), and a fixing plate (8) is fixedly installed on the upper end of the frame.

6. A throttling and kill manifold with a sand-control structure according to claim 5, characterized in that: A sealing gasket (10) is fixedly installed at the lower end of the fixing plate (8). The front and rear ends of the fixing plate (8) are located directly above the two ear plates (11) and are fixed by bolts and ear plates (11). At this time, the sealing gasket (10) is tightly attached to the upper end of the operating tube (4) to seal the insertion interface (6).

7. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The lower end of the sedimentation pipe (5) is bolted with a sealing plate (16). The diameter of the sealing plate (16) is larger than that of the sedimentation pipe (5). A limiting ring (19) is fixedly installed on the inner side of the lower end of the sedimentation pipe (5). The limiting ring (19) is located below the sand outlet (26). A fixing ring (15) is fixedly installed on the outer side of the lower end of the sedimentation pipe (5). Several fixing holes (18) are opened on the outer end of the fixing ring (15) and the outer end of the sealing plate (16). One end of the bolt passes through the fixing holes (18) on the fixing ring (15) and the sealing plate (16) in sequence and is threaded with a nut.

8. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: The sealing plate (16) is fixedly installed with a sealing ring two (22) and a plug ring (20) at its inner end. The plug ring (20) is located inside the sealing ring two (22), and the outer end of the plug ring (20) is fixedly installed with a sealing ring one (21).

9. A throttling and kill manifold with a sand-control structure according to claim 8, characterized in that: When the insertion ring (20) is slidably inserted into the inner side of the lower end of the sand settling pipe (5), the sealing ring one (21) and the limiting ring (19) come into contact, and at the same time the sealing ring two (22) and the lower port side wall of the sand settling pipe (5) come into contact.

10. A throttling and kill manifold with a sand-control structure according to claim 1, characterized in that: A threaded cylinder (17) is fixedly installed in the middle part of the sealing plate (16). The threaded cylinder (17) penetrates the side wall of the sealing plate (16). A threaded rod (23) is threadedly connected inside the threaded cylinder (17). One end of the threaded rod (23) passes through the threaded cylinder (17) and is rotatably connected to one end of the piston (25) through a bearing. The piston (25) contacts the inner wall of the sand settling pipe (5). The end of the threaded rod (23) away from the piston (25) is located at the outer end of the threaded cylinder (17) and is fixedly installed with a drive rod (24). By rotating the threaded rod (23), the piston (25) can be driven to the upper side of the sand outlet (26).

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