Corrosion-resistant ball valve for shale gas exploitation

Abstract

The invention belongs to the technical field of shale gas exploitation, and provides a corrosion-resistant ball valve for shale gas exploitation, which comprises a valve body, an input pipeline and an output pipeline are respectively arranged on two sides of the valve body, and first mounting rings are fixedly connected to the peripheries of two ends of the valve body; a second mounting ring is fixedly connected to the periphery of the ends, close to the valve body, of the input pipeline and the output pipeline, a connecting assembly is arranged at the joint of the first mounting ring and the second mounting ring, and a filter screen used for filtering sand and rock debris is mounted in the side, close to the input pipeline, of the valve body; a cleaning assembly is arranged on the side, close to the input pipeline, of the filter screen. According to the shale gas check valve, mounting and dismounting between the valve body and a pipeline can be simpler and faster, the working efficiency is effectively improved, the valve body can obstruct solid particles carried in shale gas, sealing failure caused by abrasion of the valve body is effectively avoided, and meanwhile the filter screen can be cleaned when being blocked.

Description

Technical Field

[0001] This invention belongs to the field of shale gas extraction technology, specifically a corrosion-resistant ball valve for shale gas extraction. Background Technology

[0002] Shale gas is an unconventional natural gas with methane as its main component, found in organic-rich shale and its interlayers. It is formed through both biological and thermal origins and is characterized by its self-generation and self-storage, extremely low permeability, and predominantly adsorbed and free states. Its extraction requires technologies such as horizontal wells and hydraulic fracturing, making it challenging and time-consuming. Globally, there are abundant recoverable resources, and its development is of great significance for increasing energy supply, ensuring energy security, driving economic development, and reducing environmental pollution.

[0003] Ball valves are used to connect input and output pipelines during shale gas extraction. However, current ball valves have a relatively simple structure, and their connection to pipelines is mostly through flanges and bolts. Although this method is simple to operate, it is time-consuming to install and disassemble, which affects work efficiency. At the same time, they do not have internal filters to block solid particles. When sand and rock fragments carried in shale gas come into contact with the internal flow channels and sealing surfaces of the valve body, they will cause wear and tear, which may lead to valve body seal failure and shale gas leakage.

[0004] Therefore, those skilled in the art have proposed a method for shale gas development using corrosion-resistant ball valves to address the problems mentioned in the background art. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a corrosion-resistant ball valve for shale gas operation, which solves the problems of time-consuming installation and disassembly between the valve body and the pipeline, and wear caused by solid particles carried by shale gas on the valve body in the prior art.

[0006] A corrosion-resistant ball valve for shale gas extraction includes a valve body with an input pipe and an output pipe on both sides. A first mounting ring is fixedly connected to the outer periphery of both ends of the valve body. A second mounting ring is fixedly connected to the outer periphery of the input and output pipes near the valve body. Sealing grooves are formed on the surfaces of both ends of the valve body, and sealing grooves are also formed on the surfaces of the input and output pipes near the valve body. A rubber sealing gasket is movably connected within each sealing groove. A connecting assembly is provided at the connection between the first and second mounting rings. A filter screen for filtering sand and rock debris is installed inside the valve body near the input pipe, and a cleaning assembly is provided on the side of the filter screen near the input pipe.

[0007] Preferably, the connecting assembly includes a mounting groove, a mounting block, a mounting hole, a connecting groove, and a mounting rod. The mounting groove is formed on the side surface of the first mounting ring near the input or output pipe. The mounting block is fixedly connected to the side surface of the second mounting ring near the valve body and is adapted to the size of the mounting groove. The mounting hole passes through the mounting block. The connecting groove is formed inside the first mounting ring and communicates with the mounting groove. The mounting rod is slidably connected to the connecting groove and is adapted to the size of the mounting hole.

[0008] Preferably, the connecting assembly further includes a cavity, a rotating ring, and a connecting rod. The cavity is annular and is formed inside the first mounting ring. The cavity is located on the outer periphery of the mounting groove and the connecting groove and is connected to the connecting groove. The rotating ring is rotatably connected to the cavity. The connecting rod is movably connected to the connecting groove and its two ends are respectively fixedly connected to the mounting rod and the rotating ring.

[0009] Preferably, the connecting assembly further includes a groove, a slider, and a spring. The groove is formed on the surface of the first mounting ring away from the input or output pipe and communicates with the cavity. The slider is fixedly connected to the rotating ring and slidably connected to the groove. The spring is disposed inside the groove and its two ends are fixedly connected to one side of the slider and the inner wall of one side of the groove, respectively.

[0010] Preferably, the cleaning assembly includes a slot, a vertical rod, a brush, a mounting base, and a push rod. The slot is square and located inside the valve body, on the side of the filter screen closest to the input pipe. The vertical rod is slidably connected to the slot and is sized to fit it. The brush is fixedly connected to the vertical rod on the side of the vertical rod closest to the filter screen. The mounting base is fixedly connected to one side of the valve body and communicates with the slot. The push rod passes through and is slidably connected to the mounting base, with its inner end fixedly connected to the vertical rod.

[0011] Preferably, the cleaning assembly further includes an installation box and a collection box, wherein the installation box is fixedly connected to the bottom of the valve body and communicates with the empty slot, and the collection box is slidably installed inside the installation box.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention features a connecting assembly. A sliding block along a groove compresses a spring. During this process, a rotating ring rotates along the cavity with the sliding block. The connecting rod then drives the mounting rod to move synchronously with the rotating ring within the connecting groove. When the mounting rod is submerged in the connecting groove, the mounting block is placed in the mounting groove. Releasing the sliding block causes the spring to rebound, which in turn drives the rotating ring to move in the opposite direction. This, in turn, causes the mounting rod to reset via the connecting rod. When the mounting rod is inserted into the mounting hole, the mounting block is fixed in the mounting groove. This design simplifies and speeds up the installation and disassembly of the valve body and pipeline, effectively improving work efficiency.

[0013] 2. This invention incorporates a filter screen and a cleaning component. During valve operation, the filter screen blocks sand and rock fragments carried in the shale gas. When a large amount of solid particles accumulate on the filter screen surface, a push rod is pushed towards the valve body, causing the vertical rod and brush to move horizontally within the slot. During this process, the brush removes the sand and rock fragments adhering to and clogging the filter screen surface. The brushed-off sand and rock fragments fall into the collection box due to their own gravity. This design enables the valve body to block solid particles carried in the shale gas, effectively preventing valve body seal failure due to wear, and also allows for cleaning of the filter screen when it becomes clogged. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the valve body structure of the present invention; Figure 3 This is a schematic diagram of the output pipe structure of the present invention; Figure 4 This is a schematic diagram of the connection component structure of the present invention; Figure 5 for Figure 2 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the cleaning component structure of the present invention; Figure 7 for Figure 6 Enlarged view of section B in the middle.

[0015] In the picture: 1. Valve body; 2. Input pipe; 3. Output pipe; 4. First mounting ring; 5. Second mounting ring; 6. Sealing groove; 7. Connecting assembly; 71. Mounting groove; 72. Mounting block; 73. Mounting hole; 74. Connecting groove; 75. Mounting rod; 76. Cavity; 77. Rotary ring; 78. Connecting rod; 79. Slide groove; 710. Sliding block; 711. Spring; 8. Filter screen; 9. Cleaning assembly; 91. Empty groove; 92. Vertical rod; 93. Brush; 94. Mounting seat; 95. Push rod; 96. Mounting box; 97. Collection box. Detailed Implementation

[0016] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0017] As attached Figure 1 To be continued Figure 7 As shown: Example 1: This invention provides a corrosion-resistant ball valve for shale gas extraction, comprising a valve body 1, an input pipe 2 and an output pipe 3 respectively provided on both sides of the valve body 1, a first mounting ring 4 fixedly connected to the outer periphery of both ends of the valve body 1, a second mounting ring 5 fixedly connected to the outer periphery of the input pipe 2 and the output pipe 3 near the valve body 1, sealing grooves 6 formed on the surfaces of both ends of the valve body 1, and sealing grooves 6 also formed on the surfaces of the input pipe 2 and the output pipe 3 near the valve body 1, with a rubber sealing gasket movably connected in the sealing groove 6, and a connecting assembly 7 provided at the connection between the first mounting ring 4 and the second mounting ring 5, the connecting assembly 7 including a mounting groove 71, a mounting block 72, a mounting hole 73, a connecting groove 74, a mounting rod 75, a cavity 76, a rotating ring 77, a connecting rod 78, a sliding groove 79, a slider 710 and a spring 711.

[0018] Furthermore, the mounting groove 71 is formed on the surface of the first mounting ring 4 near the input pipe 2 or the output pipe 3. The mounting block 72 is fixedly connected to the surface of the second mounting ring 5 near the valve body 1 and is adapted to the size of the mounting groove 71. The mounting hole 73 passes through the mounting block 72. The connecting groove 74 is formed inside the first mounting ring 4 and communicates with the mounting groove 71. The mounting rod 75 is slidably connected to the connecting groove 74, and the outer diameter of the mounting rod 75 is adapted to the inner diameter of the mounting hole 73. The cavity 76 is annular and is formed inside the first mounting ring 4. Located on the outer periphery of the mounting groove 71 and the connecting groove 74 and connected to the connecting groove 74, the rotating ring 77 is rotatably connected to the cavity 76, the connecting rod 78 is movably connected to the connecting groove 74 and its two ends are respectively fixedly connected to the mounting rod 75 and the rotating ring 77, the sliding groove 79 is opened on the side surface of the first mounting ring 4 away from the input pipe 2 or the output pipe 3 and is connected to the cavity 76, the slider 710 is fixedly connected to the rotating ring 77 and slidably connected to the sliding groove 79, and the spring 711 is set inside the sliding groove 79 and its two ends are respectively fixedly connected to one side of the slider 710 and one side of the inner wall of the sliding groove 79.

[0019] As can be seen from the above, sliding the slider 710 along the slide groove 79 causes the slider 710 to compress the spring 711. During this process, the rotating ring 77 will rotate along the cavity 76 with the slider 710. The connecting rod 78 will drive the mounting rod 75 to move synchronously with the rotating ring 77 in the connecting groove 74. When the mounting rod 75 is inserted into the connecting groove 74, the mounting block 72 is placed in the mounting groove 71. Then, the slider 710 is released, and the spring 711 rebounds, which can drive the rotating ring 77 to move in the opposite direction through the slider 710. This will drive the mounting rod 75 to reset through the connecting rod 78. When the mounting rod 75 is inserted into the mounting hole 73, the mounting block 72 can be fixed in the mounting groove 71.

[0020] Example 2: This example is basically the same as the previous example, except that a filter screen 8 for filtering sand and rock chips is installed inside the valve body 1 on the side near the input pipe 2. A cleaning component 9 is provided on the side of the filter screen 8 near the input pipe 2. The cleaning component 9 includes a slot 91, a vertical rod 92, a brush 93, a mounting base 94, a push rod 95, a mounting box 96, and a collection box 97.

[0021] Furthermore, the slot 91 is square and located inside the valve body 1. The slot 91 is located on the side of the filter screen 8 near the input pipe 2. The vertical rod 92 is slidably connected to the slot 91 and is sized to match. The brush 93 is fixedly connected to the side of the vertical rod 92 near the filter screen 8. The mounting base 94 is fixedly connected to one side of the valve body 1 and communicates with the slot 91. The push rod 95 passes through and is slidably connected to the mounting base 94. The inner end of the push rod 95 is fixedly connected to the vertical rod 92. The cleaning assembly 9 also includes a mounting box 96 and a collection box 97. The mounting box 96 is fixedly connected to the bottom of the valve body 1 and communicates with the slot 91. The collection box 97 is slidably installed inside the mounting box 96.

[0022] As can be seen from the above, pushing the push rod 95 will cause the vertical rod 92 and the brush 93 to move horizontally in the slot 91. During this process, the brush 93 will brush away the sand and rock debris attached to and clogging the surface of the filter screen 8. The brushed sand and rock debris will fall into the collection box 97 for collection due to their own gravity.

[0023] Working principle: First, slide the slider 710 along the slide groove 79 to compress the spring 711. During this process, the rotating ring 77 will rotate along the cavity 76 with the slider 710. The connecting rod 78 will drive the mounting rod 75 to move synchronously with the rotating ring 77 in the connecting groove 74. When the mounting rod 75 is submerged in the connecting groove 74, the mounting block 72 of the second mounting ring 5 on the outer periphery of the input pipe 2 and the output pipe 3 is placed in the mounting groove 71 of the first mounting ring 4 on the outer periphery of both ends of the valve body 1. Then, the slider 71 is released. 0. Spring 711 rebounds and drives the rotating ring 77 to move in the opposite direction via slider 710, thereby driving the mounting rod 75 to reset via connecting rod 78. When mounting rod 75 is inserted into mounting hole 73, mounting block 72 is fixed in mounting groove 71, thus completing the connection between first mounting ring 4 and second mounting ring 5, and completing the installation of input pipe 2 or output pipe 3 with valve body 1. Sliding slider 710 along slide groove 79 again causes it to drive mounting rod 75 into connecting groove 74 via rotating ring 77 and connecting rod 78. When the mounting rod 75 is moved out of the mounting hole 73, the mounting block 72 is removed from the mounting groove 71. At this time, the input pipe 2 or output pipe 3 can be removed from both ends of the valve body 1. During the operation of the valve body 1, the filter screen 8 will block the sand and rock fragments carried in the shale gas, thereby preventing solid particles from contacting the internal flow channel and sealing surface of the valve body 1, and thus preventing the valve body 1 from failing to seal due to wear. When a lot of solid particles accumulate on the surface of the filter screen 8, push the push rod 95 towards the valve body 1 to drive the vertical rod 9. 2 and brush 93 move horizontally within the empty slot 91. During this process, brush 93 brushes away the sand and rock debris adhering to and clogging the surface of filter screen 8. The brushed-off sand and rock debris fall into the collection box 97 due to their own gravity for collection. Then, push rod 95 is pulled outwards from valve body 1 to reset vertical rod 92 and brush 93, ready for subsequent cleaning of filter screen 8. When there is a large accumulation of solid particles in collection box 97, collection box 97 is pulled outwards until it is removed from installation box 96 for processing.

[0024] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made by those skilled in the art to the above embodiments within the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant ball valve for shale gas extraction, characterized in that: The valve body (1) includes an input pipe (2) and an output pipe (3) on both sides of the valve body (1). A first mounting ring (4) is fixedly connected to the outer periphery of both ends of the valve body (1). A second mounting ring (5) is fixedly connected to the outer periphery of the input pipe (2) and the output pipe (3) near the valve body (1). A sealing groove (6) is opened on the surface of both ends of the valve body (1). A sealing groove (6) is also opened on the surface of the input pipe (2) and the output pipe (3) near the valve body (1). A rubber sealing gasket is movably connected in the sealing groove (6). A connecting component (7) is provided at the connection between the first mounting ring (4) and the second mounting ring (5). A filter screen (8) for filtering sand and rock chips is installed inside the side of the valve body (1) near the input pipe (2). A cleaning component (9) is provided on the side of the filter screen (8) near the input pipe (2).

2. The corrosion-resistant ball valve for shale gas extraction as described in claim 1, characterized in that: The connecting assembly (7) includes a mounting groove (71), a mounting block (72), a mounting hole (73), a connecting groove (74), and a mounting rod (75). The mounting groove (71) is opened on the side surface of the first mounting ring (4) near the input pipe (2) or the output pipe (3). The mounting block (72) is fixedly connected to the side surface of the second mounting ring (5) near the valve body (1) and is adapted to the size of the mounting groove (71). The mounting hole (73) passes through the mounting block (72). The connecting groove (74) is opened inside the first mounting ring (4) and communicates with the mounting groove (71). The mounting rod (75) is slidably connected to the connecting groove (74) and is adapted to the size of the mounting hole (73).

3. The corrosion-resistant ball valve for shale gas extraction as described in claim 2, characterized in that: The connecting assembly (7) further includes a cavity (76), a rotating ring (77), and a connecting rod (78). The cavity (76) is annular and is located inside the first mounting ring (4). The cavity (76) is located on the outer periphery of the mounting groove (71) and the connecting groove (74) and is connected to the connecting groove (74). The rotating ring (77) is rotatably connected to the cavity (76). The connecting rod (78) is movably connected to the connecting groove (74) and its two ends are fixedly connected to the mounting rod (75) and the rotating ring (77), respectively.

4. The corrosion-resistant ball valve for shale gas extraction as described in claim 3, characterized in that: The connecting assembly (7) further includes a groove (79), a slider (710), and a spring (711). The groove (79) is opened on the side surface of the first mounting ring (4) away from the input pipe (2) or the output pipe (3) and is connected to the cavity (76). The slider (710) is fixedly connected to the rotating ring (77) and slidably connected to the groove (79). The spring (711) is disposed inside the groove (79) and its two ends are fixedly connected to one side of the slider (710) and the inner wall of one side of the groove (79), respectively.

5. The corrosion-resistant ball valve for shale gas extraction as described in claim 1, characterized in that: The cleaning assembly (9) includes a slot (91), a vertical rod (92), a brush (93), a mounting base (94), and a push rod (95). The slot (91) is square and located inside the valve body (1). The slot (91) is located on the side of the filter screen (8) near the input pipe (2). The vertical rod (92) is slidably connected to the slot (91) and is sized to match. The brush (93) is fixedly connected to the side of the vertical rod (92) near the filter screen (8). The mounting base (94) is fixedly connected to one side of the valve body (1) and communicates with the slot (91). The push rod (95) passes through and is slidably connected to the mounting base (94). The inner end of the push rod (95) is fixedly connected to the vertical rod (92).

6. The corrosion-resistant ball valve for shale gas extraction as described in claim 5, characterized in that: The cleaning component (9) also includes a mounting box (96) and a collection box (97). The mounting box (96) is fixedly connected to the bottom of the valve body (1) and communicates with the empty groove (91). The collection box (97) is slidably installed inside the mounting box (96).

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