Fracturing gate valve and mining system

Abstract

The invention discloses a fracturing gate valve and an exploitation system, and relates to the technical field of switch valves. The fracturing gate valve comprises a valve body and a sand blocking ring, the valve body comprises a valve body, a valve seat and a gate plate, a valve cavity is formed in the valve body, the valve seat and the gate plate are both arranged in the valve cavity, the valve body is provided with a first half groove, the valve seat is provided with a second half groove, and the first half groove and the second half groove define a first limiting groove; the sand blocking ring is arranged in the first limiting groove to shield a joint between the valve body and the valve seat, and the outer diameter of the sand blocking ring is smaller than the inner diameter of the first limiting groove. According to the fracturing gate valve, the sand blocking ring can keep a normal sand blocking function, so that the normal use of the fracturing gate valve is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of switch valves, and in particular to a fracturing gate valve and a mining system. Background Art

[0002] The main function of the fracturing gate valve is to control the opening and closing of the pipeline during the extraction of energy such as oil and natural gas. It is suitable for high-pressure and complex operating conditions and is widely used in the field of oil and gas extraction.

[0003] In order to prevent fracturing sand from entering the valve cavity through the gap between the valve body and the valve seat, a sand retaining ring is required to be set in the valve body to block the gap between the valve body and the valve seat. However, fracturing sand is easily deposited in the gap between the sand retaining ring and the valve body or valve seat, causing the sand retaining ring, valve body or valve seat to be squeezed, deformed or worn, causing the sand retaining ring to lose its sand retaining ability, affecting the normal use of the fracturing gate valve. Summary of the invention

[0004] The purpose of the present invention is to provide a fracturing gate valve and a mining system, which can enable the sand retaining ring to maintain a normal sand retaining function, thereby ensuring the normal use of the fracturing gate valve.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Fracturing gate valve, including:

[0007] The valve body comprises a valve body, a valve seat and a gate plate, wherein a valve cavity is arranged in the valve body, the valve seat and the gate plate are arranged in the valve cavity, the valve body is provided with a first half groove, the valve seat is provided with a second half groove, and the first half groove and the second half groove are combined to form a first limiting groove;

[0008] A sand retaining ring is arranged in the first limiting groove to cover the joint between the valve body and the valve seat, and the outer diameter of the sand retaining ring is smaller than the inner diameter of the first limiting groove.

[0009] As an optional solution of the above-mentioned fracturing gate valve, the sand retaining ring is provided with a plurality of constant pressure holes spaced apart along the circumferential direction.

[0010] As an optional solution of the above-mentioned fracturing gate valve, a plurality of sand storage grooves are provided on a side wall of the valve body radially facing the valve seat, and the plurality of sand storage grooves are arranged at intervals along the radial direction of the valve body.

[0011] As an optional solution of the above-mentioned fracturing gate valve, the fracturing gate valve further includes a first elastic member, which is disposed between the valve body and the valve seat, and is configured to press the valve seat against the gate plate.

[0012] As an optional solution of the above-mentioned fracturing gate valve, the first elastic member is a wave spring.

[0013] As an optional solution of the above-mentioned fracturing gate valve, the fracturing gate valve further includes a first sealing member, and the first sealing member is arranged between the valve body and the outer peripheral surface of the valve seat.

[0014] As an optional solution for the above-mentioned fracturing gate valve, the first sealing member is a U-shaped ring, the inner circle of the U-shaped ring is sleeved on the outer circumference of the valve seat, the outer circle of the U-shaped ring contacts the inner wall of the seat ring hole of the valve body, and the opening direction of the U-shaped ring is facing away from the gate plate.

[0015] As an optional solution of the above-mentioned fracturing gate valve, the fracturing gate valve also includes a second sealing member and a positioning member, the outer peripheral surface of the valve seat is provided with a positioning groove, the positioning member, the first sealing member and the second sealing member are all arranged in the positioning groove, and the first sealing member and the second sealing member are respectively located on both sides of the positioning member, and the opening direction of the second sealing member is opposite to that of the first sealing member.

[0016] As an optional solution of the above-mentioned fracturing gate valve, the valve body includes two valve seats, and the two valve seats are located at two ends of the gate plate along the axial direction of the valve body.

[0017] The mining system comprises the fracturing gate valve and a mining pipeline, wherein the fracturing gate valve is arranged on the mining pipeline.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides a fracturing gate valve and a mining system. In the fracturing gate valve, a sand retaining ring is arranged in a first limiting groove formed by a valve body and a valve seat, which can ensure the stability of the sand retaining ring along the axial direction of the fracturing gate valve. Since the outer diameter of the sand retaining ring is smaller than the inner diameter of the first limiting groove, the sand retaining ring will generate radial vibration under the impact of the fluid during the operation of the fracturing gate valve, thereby vibrating off the fracturing sand deposited in the gap between the sand retaining ring and the valve body or the valve seat, avoiding the sand retaining ring, the valve body or the valve seat from being squeezed, deformed or worn, so that the sand retaining ring maintains a normal sand retaining function, thereby ensuring the normal use of the fracturing gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of a fracturing gate valve provided by the present invention;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 It is a cross-sectional view of the valve body provided by the present invention.

[0023] In the figure:

[0024] 1. Valve body; 11. Valve body; 111. First circulation channel; 112. Second circulation channel; 113. Sand storage groove; 114. First limiting groove; 115. Second limiting groove; 12. Valve seat; 121. Valve seat passage hole; 13. Gate; 131. Gate passage hole; 14. Valve cavity; 15. Middle cavity; 16. Second gap; 17. First gap;

[0025] 2. Sand retaining ring; 21. Constant pressure hole;

[0026] 3. Drive shaft;

[0027] 4. Hand wheel;

[0028] 5. a first elastic member;

[0029] 6. The first sealing member;

[0030] 7. Second sealing member;

[0031] 8. Positioning parts. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0034] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] The main function of the fracturing gate valve is to control the opening and closing of the pipeline in the extraction of energy such as oil and natural gas. It is suitable for high-pressure and complex working conditions and is widely used in the field of oil and gas extraction. This embodiment provides an extraction system, which includes a fracturing gate valve and an extraction pipeline. The fracturing gate valve is arranged on the extraction pipeline, and the fracturing gate valve can control the opening and closing of the extraction pipeline.

[0038] like Figure 1 to Figure 3 As shown, the fracturing gate valve comprises a valve body 1, the valve body 1 comprises a valve body 11, a valve seat 12 and a gate plate 13, a valve cavity 14 is arranged in the valve body 11, and the valve seat 12 and the gate plate 13 are both arranged in the valve cavity 14. Among them, the valve body 11 is provided with a first circulation channel 111 and a second circulation channel 112 along the axial direction of the fracturing gate valve, the valve seat 12 is provided with a valve seat channel hole 121 along the axial direction of the fracturing gate valve, and the two ends of the valve seat channel hole 121 are respectively connected to the first circulation channel 111 and the second circulation channel 112, the gate plate 13 is arranged in the valve body 11 along the radial direction, and the gate plate 13 is provided with a gate plate channel hole 131, when the gate plate channel hole 131 of the gate plate 13 completely overlaps with the valve seat channel hole 121, the fracturing gate valve is opened; when the gate plate channel hole 131 of the gate plate 13 does not intersect with the valve seat channel hole 121, the fracturing gate valve is closed.

[0039] In order to facilitate the operator to move the gate plate 13, the fracturing gate valve also includes a drive shaft 3 and a handwheel 4. The drive shaft 3 is penetrated through the valve body 11 and is threadedly connected to the valve body 11, and the drive shaft 3 is rotatably connected to the gate plate 13. The handwheel 4 is coaxially connected to one end of the drive shaft 3 extending out of the valve body 11. By rotating the drive shaft 3, the gate plate 13 can be driven to move, and the handwheel 4 can reduce the force of the operator to rotate the drive shaft 3, thereby reducing the operator's work intensity.

[0040] Specifically, the drive shaft 3 is a ball screw structure, which has low friction loss and high transmission efficiency, and can effectively reduce the opening torque and the number of switching turns of the fracturing gate valve, saving time and manpower for switching the fracturing gate valve.

[0041] In this embodiment, the driving shaft 3 is arranged in the vertical direction, the gate plate 13 is lifted and lowered in the vertical direction in the valve body 11, and the fluid flows from the first circulation channel 111 to the second circulation channel 112. That is to say, the first circulation channel 111 and the second circulation channel 112 of the valve body 11 are arranged in the horizontal direction, and the first circulation channel 111 and the second circulation channel 112 are respectively located at the opposite ends of the valve cavity 14 in the horizontal direction.

[0042] In order to prevent fracturing sand from entering the valve cavity 14 through the gap between the valve body 11 and the valve seat 12, in the present embodiment, the fracturing gate valve also includes a sand retaining ring 2, which is used to cover the joint between the valve body 11 and the valve seat 12. It is worth noting that the joint is a radial joint between the valve body 11 and the valve seat 12, and the joint extends circumferentially along the valve seat channel hole 121, so the sand retaining ring 2 can completely cover the joint.

[0043] In this embodiment, the valve body 11 is provided with a first half groove, and the valve seat 12 is provided with a second half groove. The first half groove and the second half groove together form a first limiting groove 114. The sand retaining ring 2 is arranged in the first limiting groove 114, and the outer diameter of the sand retaining ring 2 is smaller than the inner diameter of the first limiting groove 114.

[0044] In the fracturing gate valve, the sand retaining ring 2 is arranged in the first limiting groove 114 formed by the valve body 11 and the valve seat 12, which can ensure the stability of the sand retaining ring 2 along the axial direction of the fracturing gate valve. Since the outer diameter of the sand retaining ring 2 is smaller than the inner diameter of the first limiting groove 114, the sand retaining ring 2 will generate radial vibration under the impact of the fluid during the operation of the fracturing gate valve, thereby dropping the fracturing sand deposited in the gap between the sand retaining ring 2 and the valve body 11 or the valve seat 12, avoiding the sand retaining ring 2, the valve body 11 or the valve seat 12 from being squeezed, deformed or worn, so that the sand retaining ring 2 maintains a normal sand retaining function, thereby ensuring the normal use of the fracturing gate valve.

[0045] Furthermore, along the axial direction of the fracturing gate valve, the width of the sand retaining ring 2 is smaller than the width of the first limiting groove 114 , so as to further increase the vibration amplitude of the sand retaining ring 2 .

[0046] like Figure 2 As shown, the sand retaining ring 2 is provided with a plurality of constant pressure holes 21 spaced apart along the circumferential direction. The constant pressure holes 21 can balance the air pressure inside the sand retaining ring 2 and between the sand retaining ring 2 and the first limiting groove 114, so as to avoid the sand retaining ring 2 being pressed tightly against the first limiting groove 114 due to excessive pressure inside the sand retaining ring 2, thereby preventing the sand retaining ring 2 from vibrating.

[0047] In this embodiment, the fracturing gate valve further includes a first elastic member 5, which is disposed between the valve body 11 and the valve seat 12, and is configured to press the valve seat 12 against the gate plate 13. The provision of the first elastic member 5 can increase the pressing force between the valve seat 12 and the gate plate 13, thereby reducing the gap between the valve seat 12 and the gate plate 13, improving the sealing between the valve seat 12 and the gate plate 13, and preventing fracturing sand from entering the valve cavity 14 through the gap between the valve seat 12 and the gate plate 13.

[0048] In some embodiments, the first elastic member 5 is a wave spring, which has good stability, small size, a large stiffness range, and provides a more stable elastic force.

[0049] like Figure 2 As shown, the valve body 11 is provided with a second limiting groove 115, the second limiting groove 115 is connected to the first half groove, and the first elastic member 5 is arranged in the second limiting groove 115. The arrangement of the second limiting groove 115 can provide an installation space for the first elastic member 5, and since the second limiting groove 115 is connected to the first half groove, it is convenient to install the first elastic member 5 during assembly, thereby improving assembly efficiency.

[0050] In this embodiment, the sand retaining ring 2 has a plurality of constant pressure holes 21 whose radial projections along the fracturing gate valve are all located in the second limiting groove 115 to ensure that the constant pressure holes 21 will not be blocked by the first limiting groove 114 .

[0051] like Figure 2 As shown, the side wall of the valve body 11 facing the valve seat 12 in the radial direction is provided with a plurality of sand storage grooves 113, and the plurality of sand storage grooves 113 are arranged at intervals in the radial direction of the valve body 11. When the fracturing sand enters the gap between the valve body 11 and the valve seat 12 through the sand retaining ring 2, the arrangement of the sand storage grooves 113 will reduce the pressure on the fracturing sand, and the arrangement of the sand storage grooves 113 can also increase the length and complexity of the route of impurity flow, which can effectively prevent the intrusion of the fracturing sand and prevent the fracturing sand from entering the valve cavity 14 through the gap between the valve body 11 and the valve seat 12.

[0052] In order to further prevent the intrusion of fracturing sand, the fracturing gate valve further includes a first sealing member 6, which is disposed between the outer peripheral surface of the valve body 11 and the valve seat 12. It can be understood that the gap between the valve body 11 and the valve seat 12 is divided into two sections, one section extending along the radial direction of the fracturing gate valve, called the first gap 17, and the other section extending along the axial direction of the fracturing gate valve, called the second gap 16. In other words, a plurality of sand storage grooves 113 are opened in the first gap 17, and the first sealing member 6 is disposed in the second gap 16.

[0053] Furthermore, the first sealing member 6 is a U-shaped ring, the inner circle of which is sleeved on the outer circumference of the valve seat 12, the outer circle of which is in contact with the inner wall of the seat ring hole of the valve body 11, and the opening direction of the U-shaped ring is oriented away from the gate plate 13. When the fracturing sand intrudes into the U-shaped ring, the fracturing sand enters the interior of the U-shaped ring along with the fluid, causing the pressure inside the U-shaped ring to increase, thereby forcing the pressure between the U-shaped ring and the valve body 11 and the valve seat 12 to increase, that is, the pressure inside the U-shaped ring can improve the sealing effect of the U-shaped ring, thereby preventing the fracturing sand from continuing to intrude.

[0054] like Figure 2 As shown, the fracturing gate valve further includes a second sealing member 7 and a positioning member 8. A positioning groove is provided on the outer peripheral surface of the valve seat 12. The positioning member 8, the first sealing member 6 and the second sealing member 7 are all arranged in the positioning groove, and the first sealing member 6 and the second sealing member 7 are respectively located on both sides of the positioning member 8. The second sealing member 7 can continue to play a sealing role in the event of failure of the first sealing member 6 to prevent the intrusion of fracturing sand, while the positioning member 8 can prevent the first sealing member 6 from abutting against the second sealing member 7 under the action of pressure, ensuring that the first sealing member 6 and the second sealing member 7 can both play a sealing role independently.

[0055] Specifically, the second sealing member 7 can be a U-shaped ring or an O-shaped ring, as long as it can play a sealing role. In this embodiment, the second sealing member 7 is a U-shaped ring, and the first sealing member 6 and the second sealing member 7 are symmetrically arranged about the positioning member 8.

[0056] In this embodiment, the valve body 1 includes two valve seats 12, and the two valve seats 12 are located at both ends of the gate plate 13 along the axial direction of the valve body 1. The two valve seats 12 abut the gate plate 13 from both sides of the gate plate 13 to form a seal, which can make the gate plate 13 more evenly stressed, and avoid the gate plate 13 being offset due to the single-sided valve seat 12 pressing the gate plate 13 against the valve body 11, or affecting the sealing effect due to force deviation.

[0057] It is worth noting that, in this embodiment, the two valve seats 12 of the fracturing gate valve and the structure between the two valve seats 12 and the valve body 11 are symmetrically arranged about the drive shaft 3, so the valve seat 12 downstream of the gate plate 13 and the structure between the valve seat 12 and the valve body 11 are not repeated.

[0058] In this embodiment, the valve cavity 14 includes a middle cavity 15, the middle cavity 15 extends in the vertical direction, the gate plate 13 is slidably arranged in the middle cavity 15, and the cross-sectional shape of the middle cavity 15 along the horizontal plane is a runway shape. The runway shape is formed by two straight sections and two semicircles, and its shape is an oblong. Compared with the conventional cylindrical middle cavity, the straight section of the valve cavity 14 can effectively reduce the stress concentration before and after the valve under high pressure. The valve of the middle cavity 15 can effectively reduce the volume of the middle cavity 15 by about 30%, thereby reducing the injection volume of the sealing grease. In addition, compared with the circular middle cavity, the runway-shaped middle cavity used in this embodiment can shorten the end face distance of the seat ring holes on both sides of the valve body 11, thereby reducing the thickness of the adapted valve seat 12 and the gate plate 13, and can effectively reduce the overall weight of the fracturing gate valve, thereby making the valve lighter and saving necessary production and transportation costs.

[0059] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. Fracturing gate valve, characterized in that: include: A valve body (1) comprises a valve body (11), a valve seat (12) and a gate plate (13); a valve cavity (14) is arranged in the valve body (11); the valve seat (12) and the gate plate (13) are both arranged in the valve cavity (14); the valve body (11) is provided with a first half groove; the valve seat (12) is provided with a second half groove; the first half groove and the second half groove together form a first limiting groove (114); A sand retaining ring (2), the sand retaining ring (2) being arranged in the first limiting groove (114) to cover the joint between the valve body (11) and the valve seat (12), the outer diameter of the sand retaining ring (2) being smaller than the inner diameter of the first limiting groove (114).

2. The fracturing gate valve according to claim 1, characterized in that: The sand retaining ring (2) is provided with a plurality of constant pressure holes (21) spaced apart along the circumferential direction.

3. The fracturing gate valve according to claim 1, characterized in that: A plurality of sand storage grooves (113) are provided on the side wall of the valve body (11) facing the valve seat (12) in the radial direction, and the plurality of sand storage grooves (113) are arranged at intervals in the radial direction of the valve body (11).

4. The fracturing gate valve according to claim 1, characterized in that: The fracturing gate valve further comprises a first elastic member (5), wherein the first elastic member (5) is arranged between the valve body (11) and the valve seat (12), and the first elastic member (5) is configured to press the valve seat (12) against the gate plate (13).

5. The fracturing gate valve according to claim 4, characterized in that: The first elastic member (5) is a wave spring.

6. The fracturing gate valve according to claim 1, characterized in that: The fracturing gate valve further comprises a first sealing member (6), wherein the first sealing member (6) is arranged between the valve body (11) and the outer peripheral surface of the valve seat (12).

7. The fracturing gate valve according to claim 6, characterized in that: The first sealing member (6) is a U-shaped ring, the inner circle of the U-shaped ring is sleeved on the outer circumference of the valve seat (12), the outer circle of the U-shaped ring contacts the inner wall of the seat ring hole of the valve body (11), and the opening direction of the U-shaped ring is facing away from the gate plate (13).

8. The fracturing gate valve according to claim 6, characterized in that: The fracturing gate valve further comprises a second sealing member (7) and a positioning member (8); a positioning groove is provided on the outer peripheral surface of the valve seat (12); the positioning member (8), the first sealing member (6) and the second sealing member (7) are all arranged in the positioning groove; the first sealing member (6) and the second sealing member (7) are respectively located on both sides of the positioning member (8); and the opening direction of the second sealing member (7) is opposite to that of the first sealing member (6).

9. The fracturing gate valve according to any one of claims 1 to 8, characterized in that: The valve body (1) comprises two valve seats (12), and the two valve seats (12) are located at two ends of the gate plate (13) along the axial direction of the valve body (1).

10. A mining system, characterized in that: The invention comprises the fracturing gate valve according to any one of claims 1 to 9, and further comprises a production pipeline, wherein the fracturing gate valve is arranged on the production pipeline.

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