Fracturing gate valve and exploitation system

Abstract

A fracturing gate valve and an exploitation system. The fracturing gate valve comprises a valve main body (1) and a sand retaining ring (2); the valve main body (1) comprises a valve body (11), a valve seat (12), and a gate plate (13); a valve cavity (14) is provided in the valve body (11); both the valve seat (12) and the gate plate (13) are provided in the valve cavity (14); the valve body (11) is provided with a first half groove (116); the valve seat (12) is provided with a second half groove (117); the first half groove (116) and the second half groove (117) are enclosed to form a first limiting groove (114); the sand retaining ring (2) is arranged in the first limiting groove (114) to block the gap between the valve body (11) and the valve seat (12); and the outer diameter of the sand retaining ring (2) is less than the inner diameter of the first limiting groove (114). The exploitation system comprises an exploitation pipeline, and the fracturing gate valve is arranged on the exploitation pipeline. The sand retaining ring (2) is arranged in the first limiting groove (114), so that the stability of the sand retaining ring (2) in the axial direction of the fracturing gate valve can be ensured.

Description

Fracturing gate valve and exploitation system

[0001] The present application claims priority to the Chinese patent application No. 202411225086.8, filed on September 03, 2024, with the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of switch valve, for example, to a fracturing gate valve and exploitation system. BACKGROUND

[0003] The main function of the fracturing gate valve is to control the opening and closing of the pipeline in the exploitation of energy sources such as oil and natural gas, and it is suitable for high-pressure complex operation conditions and is widely used in the field of oil and gas exploitation.

[0004] 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 needs to be arranged in the valve body to block the gap between the valve body and the valve seat. However, fracturing sand is easy to deposit at the gap between the sand retaining ring and the valve body or the valve seat, causing the sand retaining ring, the valve body or the valve seat to be extruded and deformed or worn, so that the sand retaining ring loses the sand retaining ability, affecting the normal use of the fracturing gate valve. SUMMARY

[0005] The present application provides a fracturing gate valve and exploitation system, which can keep the sand retaining ring in normal sand retaining function, thereby ensuring the normal use of the fracturing gate valve.

[0006] The present application provides a fracturing gate valve, comprising:

[0007] a valve body comprising a valve body, a valve seat and a gate plate, the valve body is provided with a valve cavity, 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 form a first limiting groove;

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

[0009] Optionally, a plurality of constant pressure holes are arranged in the sand retaining ring in a circumferential direction.

[0010] Optionally, a plurality of sand storage grooves are arranged in the valve body in a radial direction opposite to the side wall of the valve seat, and the plurality of sand storage grooves are arranged in a radial direction of the valve body.

[0011] Optionally, the fracturing gate valve further comprises a first elastic member arranged between the valve body and the valve seat, and the first elastic member is configured to press the valve seat against the gate plate.

[0012] Optionally, the first elastic member is a wave spring.

[0013] Optionally, the fracturing gate valve further comprises a first sealing member, which is arranged between the outer circumferential surface of the valve body and the valve seat.

[0014] Optionally, 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 is in contact with the inner wall of the seat circle hole of the valve body, and the opening direction of the U-shaped ring is directed away from the gate.

[0015] Optionally, the fracturing gate valve further comprises a second sealing member and a positioning member, the outer circumferential surface of the valve seat is provided with a positioning groove, the positioning member, the first sealing member and the second sealing member are arranged in the positioning groove, the first sealing member and the second sealing member are respectively located on the two sides of the positioning member, and the opening direction of the second sealing member is opposite to that of the first sealing member.

[0016] Optionally, the valve body comprises two valve seats, and the two valve seats are located at the two ends of the gate along the axial direction of the valve body.

[0017] The application further provides a mining system, comprising the fracturing gate valve, and further comprising a mining pipeline, wherein the fracturing gate valve is arranged on the mining pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a sectional view of the fracturing gate valve provided by the application;

[0019] Fig. 2 is an enlarged view of a part A in Fig. 1;

[0020] Fig. 3 is a sectional view of the valve body provided by the application;

[0021] Fig. 4 is a structural schematic view of the mining system provided by the application.

[0022] In the drawings: 1, valve body; 11, valve body; 111, first flow passage; 112, second flow passage; 113, sand storage groove; 114, first limiting groove; 115, second limiting groove; 116, first half groove; 117, second half groove; 12, valve seat; 121, valve seat passage hole; 122, positioning groove; 13, gate; 131, gate passage hole; 14, valve cavity; 15, middle cavity; 16, second gap; 17, first gap; 2, sand blocking ring; 21, constant pressure hole; 3, drive shaft; 4, hand wheel; 5, first elastic member; 6, first sealing member; 7, second sealing member; 8, positioning member; 100, mining system; 10, fracturing gate valve; 20, mining pipeline. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application.

[0024] In the description of the present application, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like is based on the orientation or positional relationship shown in the drawings, and is for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation. In addition, the terms "first", "second" are used for description purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0025] Unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the meaning of the above-mentioned terms in the present application can be understood according to the actual situation.

[0026] Unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or indicates that the first feature is higher in horizontal height than the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or indicates that the first feature is lower in horizontal height than the second feature.

[0027] The scheme of the present application is described below in conjunction with the drawings and through specific embodiments.

[0028] The main function of the fracturing gate valve is to control the opening and closing of the pipeline in the exploitation of energy sources such as oil and natural gas, and it is suitable for high-pressure complex operation conditions and is widely used in the field of oil and gas exploitation. As shown in FIG. 4, the present embodiment provides an exploitation system 100, which comprises a fracturing gate valve 10 and an exploitation pipeline 20, the fracturing gate valve 10 is arranged on the exploitation pipeline 20, and the fracturing gate valve 10 can control the opening and closing of the exploitation pipeline 20.

[0029] As shown in FIG. 1-3, 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, the valve body 11 is provided with a valve cavity 14, and the valve seat 12 and the gate plate 13 are arranged in the valve cavity 14. Wherein, the valve body 11 is provided with a first flow channel 111 and a second flow 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, the two ends of the valve seat channel hole 121 are communicated with the first flow channel 111 and the second flow channel 112 respectively, the gate plate 13 is arranged in the valve body 11 along the radial direction, 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 is completely coincided 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 is not intersected with the valve seat channel hole 121, the fracturing gate valve is closed.

[0030] In order to facilitate the operator to move the gate plate 13, the fracturing gate valve further comprises a drive shaft 3 and a hand wheel 4, the drive shaft 3 is arranged in the valve body 11 and is threadedly connected with the valve body 11, and the drive shaft 3 is rotationally connected with the gate plate 13, the hand wheel 4 is coaxially connected with the 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 hand wheel 4 can reduce the force of the operator rotating the drive shaft 3, thereby reducing the working strength of the operator.

[0031] Optionally, the drive shaft 3 is a ball screw structure, the ball screw structure has small friction loss and high transmission efficiency, can effectively reduce the opening torque and the number of opening and closing of the fracturing gate valve, and saves the time and manpower of opening and closing the fracturing gate valve.

[0032] In the embodiment, the drive shaft 3 is arranged along the vertical direction, the gate plate 13 is lifted along the vertical direction in the valve body 11, and the fluid flows from the first flow channel 111 to the second flow channel 112, which is taken as an example for description, that is to say, the first flow channel 111 and the second flow channel 112 of the valve body 11 are arranged along the horizontal direction, and the first flow channel 111 and the second flow channel 112 are respectively located at the opposite ends of the valve cavity 14 along the horizontal direction.

[0033] In order to prevent the fracturing sand from entering into the valve cavity 14 through the gap between the valve body 11 and the valve seat 12, in the embodiment, the fracturing gate valve further comprises a sand blocking ring 2, the sand blocking ring 2 is arranged to block the joint between the valve body 11 and the valve seat 12, the joint is the joint along the radial direction of the valve body 11 and the valve seat 12, and the joint extends along the circumferential direction of the valve seat channel hole 121, so the sand blocking ring 2 can completely block the joint.

[0034] In the embodiment, the valve body 11 is provided with a first half groove 116, the valve seat 12 is provided with a second half groove 117, the first half groove 116 and the second half groove 117 jointly form a first limiting groove 114, the sand blocking ring 2 is arranged in the first limiting groove 114, and the outer diameter of the sand blocking ring 2 is smaller than the inner diameter of the first limiting groove 114.

[0035] 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 vibrate radially under the impact of the fluid during the operation of the fracturing gate valve, thereby shaking off 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 deformation or wear of the sand retaining ring 2, valve body 11 or valve seat 12, and ensuring the normal sand retaining function of the sand retaining ring 2, thereby ensuring the normal use of the fracturing gate valve.

[0036] In some embodiments, the width of the sand retaining ring 2 is smaller than the width of the first limiting groove 114 along the axial direction of the fracturing gate valve, so as to increase the amplitude of the vibration of the sand retaining ring 2.

[0037] As shown in FIG. 2, the sand retaining ring 2 is provided with a plurality of constant pressure holes 21 which are spaced apart along the circumferential direction. The constant pressure holes 21 can balance the air pressure between the inside of the sand retaining ring 2 and the space between the sand retaining ring 2 and the first limiting groove 114, avoiding the situation that the sand retaining ring 2 is pressed tightly in the first limiting groove 114 due to excessive pressure on the inside of the sand retaining ring 2, so that the sand retaining ring 2 cannot vibrate.

[0038] In the present embodiment, the fracturing gate valve further comprises a first elastic member 5 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. The arrangement 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 performance between the valve seat 12 and the gate plate 13, and avoiding the fracturing sand entering the valve cavity 14 through the gap between the valve seat 12 and the gate plate 13.

[0039] In some embodiments, the first elastic member 5 is a wave spring, which has good stability, small volume, large stiffness range, and more stable elastic force.

[0040] As shown in FIG. 2, the valve body 11 is provided with a second limiting groove 115 which is in communication with the first half groove 116, and the first elastic member 5 is arranged in the second limiting groove 115. The arrangement of the second limiting groove 115 can provide installation space for the first elastic member 5, and since the second limiting groove 115 is in communication with the first half groove 116, it is convenient to install the first elastic member 5 during assembly, thereby improving the assembly efficiency.

[0041] In the present embodiment, the radial projection of the plurality of constant pressure holes 21 of the sand retaining ring 2 is located in the second limiting groove 115, so as to ensure that the constant pressure holes 21 are not blocked by the first limiting groove 114.

[0042] As shown in FIG. 2, the valve body 11 is provided with a plurality of sand storage grooves 113 along the radial direction of the valve body 11 and opposite to the side wall of the valve seat 12. When the fracturing sand enters the gap between the valve body 11 and the valve seat 12 through the sand blocking ring 2, the sand storage grooves 113 can reduce the pressure of the fracturing sand, and the sand storage grooves 113 can also increase the length and complexity of the flow path of the impurities, effectively prevent the invasion of the fracturing sand, and avoid the fracturing sand entering the valve cavity 14 through the gap between the valve body 11 and the valve seat 12.

[0043] In order to prevent the invasion of the fracturing sand, the fracturing gate valve further comprises a first sealing element 6 arranged between the outer circumferential surfaces of the valve body 11 and the valve seat 12. The gap between the valve body 11 and the valve seat 12 is divided into two sections, one section extends along the radial direction of the fracturing gate valve and is referred to as a first gap 17, and the other section extends along the axial direction of the fracturing gate valve and is referred to as a second gap 16. That is, the plurality of sand storage grooves 113 are arranged in the first gap 17, and the first sealing element 6 is arranged in the second gap 16.

[0044] In some embodiments, the first sealing element 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 is in contact with the inner wall of the seat hole of the valve body 11, and the opening direction of the U-shaped ring is away from the gate plate 13. When the fracturing sand invades the U-shaped ring, the fracturing sand enters the inside of the U-shaped ring together with the fluid, so that the pressure inside the U-shaped ring increases, thereby increasing the pressure between the U-shaped ring and the valve body 11 and the valve seat 12, that is, the pressure inside the U-shaped ring can improve the sealing effect of the U-shaped ring, thereby preventing the continued invasion of the fracturing sand.

[0045] As shown in FIG. 2, the fracturing gate valve further comprises a second sealing element 7 and a positioning element 8, the outer circumferential surface of the valve seat 12 is provided with a positioning groove 122, the positioning element 8, the first sealing element 6 and the second sealing element 7 are arranged in the positioning groove 122, and the first sealing element 6 and the second sealing element 7 are respectively located on the two sides of the positioning element 8. The second sealing element 7 can continue to play a sealing role in the case that the first sealing element 6 fails, preventing the invasion of the fracturing sand, and the positioning element 8 can avoid the abutment of the first sealing element 6 and the second sealing element 7 under the action of the pressure, ensuring that the first sealing element 6 and the second sealing element 7 can independently play a sealing role.

[0046] Optionally, the second sealing element 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 element 7 is a U-shaped ring, and the first sealing element 6 and the second sealing element 7 are symmetrically arranged about the positioning element 8.

[0047] In the embodiment, 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. The two valve seats 12 abut against the gate plate 13 from two sides of the gate plate 13 to form a seal, which can make the force on the gate plate 13 more uniform, avoid that the single-side valve seat 12 presses the gate plate 13 against the valve body 11 to cause the gate plate 13 to deviate, or affect the sealing effect due to the deviation of the force.

[0048] In the 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 with respect to the drive shaft 3, and therefore 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 described again.

[0049] In the embodiment, the valve cavity 14 comprises a middle cavity 15, the middle cavity 15 extends in the vertical direction, the gate plate 13 is slidingly arranged in the middle cavity 15, and the middle cavity 15 has a track shape in the horizontal plane. The track shape is formed by two straight sections and two semicircles, and has a long circular shape. Compared with the conventional cylindrical middle cavity, the straight section of the valve cavity 14 can effectively reduce the stress concentration of the front and rear of the valve under high pressure, and 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 track-shaped middle cavity used in the embodiment can shorten the end surface distance of the seat ring hole on both sides of the valve body 11, thereby reducing the thickness of the adapted valve seat 12 and the gate plate 13, and effectively reducing the overall weight of the fracturing gate valve, thereby making the valve more portable and saving the necessary production and transportation costs.

Claims

1. A fracturing gate valve, comprising: a valve body (1) comprising a valve body (11), a valve seat (12) and a gate plate (13), the valve body (11) being provided with a valve cavity (14) inside, the valve seat (12) and the gate plate (13) being provided in the valve cavity (14), the valve body (11) being provided with a first half slot (116), the valve seat (12) being provided with a second half slot (117), the first half slot (116) and the second half slot (117) enclosing a first limiting slot (114); a sand blocking ring (2) provided in the first limiting slot (114) to block the joint between the valve body (11) and the valve seat (12), the outer diameter of the sand blocking ring (2) being smaller than the inner diameter of the first limiting slot (114).

2. The frac gate valve of claim 1, wherein, The sand blocking ring (2) is provided with a plurality of constant pressure holes (21) spaced apart in the circumferential direction.

3. The frac gate valve of claim 1, wherein, The valve body (11) is provided with a plurality of sand storage grooves (113) facing the side wall of the valve seat (12) in the radial direction, and the sand storage grooves (113) are spaced apart in the radial direction of the valve body (11).

4. The fracturing gate valve according to claim 1, further comprising a first elastic member (5) provided between the valve body (11) and the valve seat (12), the first elastic member (5) being configured to press the valve seat (12) against the gate plate (13).

5. The frac gate valve of claim 4, wherein, The first elastic member (5) is a wave spring.

6. The fracturing gate valve according to claim 1, further comprising a first sealing member (6) provided between the valve body (11) and the outer circumferential surface of the valve seat (12).

7. The frac gate valve of claim 6, wherein, 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 is in contact with the seat hole inner wall of the valve body (11), and the opening direction of the U-shaped ring is away from the gate plate (13).

8. The fracturing gate valve according to claim 6, further comprising a second sealing member (7) and a positioning member (8), the outer circumferential surface of the valve seat (12) is provided with a positioning groove (122), the positioning member (8), the first sealing member (6) and the second sealing member (7) are provided in the positioning groove (122), 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 frac gate valve of any one of claims 1-8, wherein, The valve body (1) comprises two valve seats (12), and the two valve seats (12) are located at both ends of the gate plate (13) in the axial direction of the valve body (1).

10. An exploitation system, comprising the fracturing gate valve (10) according to any one of claims 1-9, and further comprising an exploitation pipeline (20), wherein the fracturing gate valve (10) is provided on the exploitation pipeline (20).

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