Sand prevention flat valve structure
By designing a sand-proof flat valve structure, using an integral valve seat and a double valve seat design, combined with a high elastic leaf spring, the problem of seal failure of the existing fracturing flat gate valve under ultra-deep well shale gas fracturing conditions is solved, achieving higher sealing and longer service life.
Patent Information
- Application Number
- CN202421329003.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing fracturing flat gate valve cannot be used stably for a long time under ultra-deep well shale gas fracturing conditions, and it is easy to cause seal failure due to sand and gravel entering the valve body, increasing the risk of well control and affecting drilling and mining efficiency.
A sand-proof flat valve structure is designed, adopting an integral valve seat structure and a double valve seat design, combined with a high elastic leaf spring to ensure that the gate plate is always in an active plane sealed state during the switching process, preventing sand and gravel from entering the valve body.
It effectively prevents sand and gravel in the oil and gas medium from entering the valve body, extends the service life of the sandproof gate valve, improves sealing and installation convenience, and reduces maintenance costs.
Smart Images
Figure CN222668965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil drilling and fracturing, in particular to a sand-proof flat valve structure. Background Art
[0002] With the continuous breakthrough of shale gas drilling and production depth (over 7,000 meters) and the continuous increase in the number of single well fracturing stages (over 40 stages), the pressure demand during fracturing construction is also getting higher and higher. For ultra-deep well shale gas production, the pressure required for fracturing construction reaches 120 MPa to 130 MPa, and even the peak pressure will exceed 138 MPa under some working conditions. The maximum design pressure of the fracturing flat gate valve in the standard specification is 138 MPa. The fracturing flat gate valve with a working pressure of 138 MPa designed according to the standard cannot be used stably for a long time under ultra-deep well shale gas fracturing conditions. Due to the high pressure, high sand content, high mesh fracturing sand, and multiple stages, the fracturing sand can easily enter the valve body cavity of the fracturing flat gate valve or the sealing surface where the valve seat and the valve body fit together with the help of pressure during the construction process. This will cause the fracturing flat gate valve in the fracturing wellhead device to fail to open and close normally, or the valve seat seal will fail. Once this happens, it will greatly increase the risk of well control, affect drilling and production efficiency, and may even cause serious consequences such as blowouts. Therefore, it is necessary to improve the existing fracturing flat gate valve to adapt to the new working conditions. Utility Model Content
[0003] The utility model aims to overcome the shortcomings of the prior art and proposes a sand-proof flat valve structure.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] A sand-proof flat valve structure comprises a front valve seat, a rear valve seat and a gate plate; the back side of the front valve seat cooperates with the front side of the gate plate, and the rear side of the gate plate cooperates with the back side of the rear valve seat; a cylinder is provided on the front side of the front valve seat and the front side of the rear valve seat, and an O-ring is installed on the cylinder; a groove is provided on the front side of the front valve seat and the front side of the rear valve seat, and a leaf spring is inserted in the groove.
[0006] Furthermore, the cylinder is connected to the inner cavity of the valve body and is sealed by an O-ring.
[0007] Furthermore, two grooves are formed on the front side of the front valve seat and the front side of the rear valve seat.
[0008] Furthermore, the cylinder is located between the two slots.
[0009] Furthermore, the slot is a column, such as a cuboid, a cube, etc.
[0010] Technical effects of the utility model:
[0011] Compared with the prior art, the sand-proof flat plate valve structure of the utility model adopts an integral valve seat structure and a double valve seat design, which makes installation more convenient and has better sealing performance. At the same time, a high-elastic leaf spring is configured to keep the gate in a bidirectional strong seal, and the gate is always in an active plane seal during the switching process. The above design can effectively prevent sand and gravel in the oil and gas medium from entering the valve body, thereby extending the service life of the sand-proof gate valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structural principle of the sand-proof flat valve of the utility model.
[0013] In the figure, 1, front valve seat; 2, leaf spring; 3, cylinder; 4, rear valve seat; 5, gate. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is clearly and completely described below in conjunction with the accompanying drawings of the specification.
[0015] Embodiment 1:
[0016] like Figure 1 As shown, the present embodiment involves a sand control flat valve structure, which includes a front valve seat 1, a leaf spring 2, a cylinder 3, a rear valve seat 4 and a gate plate 5.
[0017] The back side of the front valve seat 1 cooperates with the front side of the gate plate 5, and the back side of the gate plate 5 cooperates with the back side of the rear valve seat 4; the front side of the front valve seat 1 and the front side of the rear valve seat 4 are both provided with a cylinder 3, and the cylinder 3 is equipped with an O-type sealing ring, and the cylinder 3 is connected to the inner cavity of the valve body and sealed by the O-type sealing ring; the front side of the front valve seat 1 and the front side of the rear valve seat 4 are both provided with two slots, and the slots are rectangular parallelepiped, and the leaf spring 2 is inserted in the slots. The cylinder 3 is located between the two slots.
[0018] The utility model adopts an integral valve seat structure and a double valve seat design, which is easy to install and has reliable sealing. At the same time, a high-elasticity leaf spring 2 is configured to keep the gate 5 in a bidirectional strong seal, and the gate 5 is always in an active plane seal during the switching process. The utility model can effectively prevent sand and gravel in the oil and gas medium from entering the valve body, extending the service life of the sand-proof gate valve. In addition, the valve body sealing structure of the double valve seat sand-proof flat valve of the utility model is simple in design, easy to disassemble and assemble, and has low maintenance cost, and is suitable for flat gate valves with full series of pressure standard requirements.
[0019] The above-mentioned specific implementation methods are only specific cases of the present utility model. The patent protection scope of the present utility model includes but is not limited to the above-mentioned specific implementation methods. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field in accordance with the claims of the present utility model shall fall within the patent protection scope of the present utility model.
Claims
1. A sand control flat valve structure, characterized in that: It comprises a front valve seat (1), a rear valve seat (4) and a gate plate (5); the back side of the front valve seat (1) cooperates with the front side of the gate plate (5), and the back side of the gate plate (5) cooperates with the back side of the rear valve seat (4); a cylinder (3) is provided on the front side of the front valve seat (1) and the front side of the rear valve seat (4), and an O-ring is installed on the cylinder (3); a groove is provided on the front side of the front valve seat (1) and the front side of the rear valve seat (4), and a leaf spring (2) is inserted into the groove.
2. The sand control flat valve structure according to claim 1, characterized in that: The cylinder (3) is connected to the inner cavity of the valve body and is sealed by an O-ring.
3. The sand control flat valve structure according to claim 1, characterized in that: The front side of the front valve seat (1) and the front side of the rear valve seat (4) are both provided with two slots.
4. The sand control flat valve structure according to claim 3 is characterized in that: The cylinder (3) is located between the two slots.
5. The anti-sand flat valve structure according to any one of claims 1 to 4, characterized in that: The slot is a column.