A new type of ultra-high pressure light structure fracturing gate valve

Abstract

The present invention discloses a novel ultra-high pressure light structure fracturing gate valve, comprising a valve body, a valve plate, a valve seat assembly, a valve stem, a valve cover, a packing gland, a bearing, a valve bonnet, a handwheel adapter, a handwheel, a ball screw assembly, a lip packing, bolts and nuts, a metal sealing gasket, a tail rod, a tail rod cover, etc. The valve seat assembly is installed on both sides of the valve body opening, the valve seat sealing surface is parallel to the opening surface, the two ends of the valve plate are parallel to the valve seat surface, a metal sealing gasket is installed between the valve body and the valve cover, the valve body and the valve cover are connected by bolts and nuts, the valve stem and the valve cover, and the tail rod and the valve body are sealed by lip packing, the packing gland, bearing, ball screw assembly, valve bonnet, handwheel adapter, and handwheel are installed in sequence on the upper end of the valve cover, and the tail rod cover is installed on the lower end of the valve body. The novel ultra-high pressure light structure fracturing gate valve described in the present invention is easy to operate, has a reasonable design, a reliable service life, and a lower cost, and is particularly suitable for fracturing operations with large diameter, high pressure, and large flow.

Description

Technical Field

[0001] The present invention relates to the field of valves used in oil and natural gas development, and in particular to a novel ultra-high pressure light-structure fracturing gate valve. Background Art

[0002] The exploration and development of shale gas began in foreign countries. After years of exploration, China has achieved full self-sufficiency in natural gas through the shale gas revolution and has become a net exporter of natural gas. China started late in the field of shale gas exploration and development, but after development in recent years, it has mastered shale gas geophysics, drilling and completion, fracturing and transformation technologies, and has the ability to drill horizontal wells and perform staged fracturing, and has initially formed a shale gas exploration and development technology system suitable for China's geological conditions.

[0003] During horizontal well drilling and staged fracturing, many large-diameter, high-pressure, and high-flow valves are often required, among which gate valves are the most numerous. In order to meet the requirements of large diameter, high pressure, and high flow under fracturing conditions, the various fracturing gate valves currently on the market are very heavy, resulting in high processing and manufacturing costs. In addition, it also brings great troubles to the transportation and lifting of on-site equipment. At the same time, existing fracturing gate valves often have sand accumulation in the valve body cavity, seriously affecting on-site work efficiency.

[0004] Therefore, it is necessary to propose a new type of ultra-high pressure light structure fracturing gate valve to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide a new type of ultra-high pressure light structure fracturing gate valve, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A new type of ultra-high pressure light structure fracturing gate valve, comprising a valve body, a valve plate, a valve seat assembly, a valve stem, a valve cover, a packing gland, a bearing, a valve bonnet, a handwheel adapter, a handwheel, a ball screw assembly, a lip packing, bolts and nuts, a metal sealing gasket, a tail rod, and a tail rod cover. The valve seat assembly is installed on both sides of the valve body opening, the valve plate is connected to the tail rod and the valve stem, the valve plate is installed between the two valve seat assemblies, a metal sealing gasket is installed between the valve body and the valve cover, the valve body and the valve cover are connected by bolts and nuts, the tail rod and the valve body are sealed by a lip packing, the packing gland, bearings, a ball screw assembly, a valve bonnet, a handwheel adapter, and a handwheel are installed in sequence on the upper end of the valve cover, and the tail rod cover is installed at the lower end of the valve body.

[0008] Preferably, the valve seat assembly is installed on both sides of the valve body opening, the valve seat sealing surface is parallel to the opening surface, the valve seat assembly includes a valve seat and a valve seat sealing ring, the valve plate is connected to the tail rod and the valve stem, the valve plate is installed between the two valve seat assemblies, and both ends of the valve plate are parallel to the valve seat surface.

[0009] Preferably, a metal sealing gasket is installed between the valve body and the valve cover, and the valve body and the valve cover are connected by bolts and nuts. The pre-tightening force of the bolts and nuts assists the sealing of the metal sealing gasket.

[0010] Preferably, the valve stem and the valve cover, and the tail stem and the valve body are sealed by lip packing.

[0011] Preferably, the metal sealing gasket is a double-acting metal gasket, and its sealing surface is a spherical plane.

[0012] Preferably, the lip-shaped packing is a multi-lip packing.

[0013] Preferably, metal-to-metal sealing is adopted between the valve seat and the valve plate, and between the valve seat and the valve body. A small gap design is adopted between the valve seat and the valve plate, and between the valve seat and the valve body. The central cavity of the valve body adopts a rectangular groove structure.

[0014] Preferably, the valve body and the valve cover are subjected to pre-pressure treatment before fine machining, the sealing parts of the valve body and the valve cover are subjected to corrosion-resistant alloy surfacing treatment, and the valve body is provided with a tail rod stuffing box and a tail rod inverted sealing structure.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention provides a new ultra-high pressure light structure fracturing gate valve, which has the following beneficial effects:

[0017] 1. The new ultra-high pressure light structure fracturing gate valve adopts a rectangular groove structure in the valve body cavity, and adopts pre-pressure treatment before fine machining, which greatly reduces the wall thickness, reduces the weight of the entire valve, and saves processing and manufacturing costs.

[0018] 2. This new ultra-high pressure light structure fracturing gate valve adopts a small gap design between the valve seat and valve plate, and between the valve seat and valve body. The lip packing is a multi-lip packing. The sealing parts of the valve body and valve cover are welded with corrosion-resistant alloy. The valve has better sand control effect and longer service life.

[0019] 3. This new ultra-high pressure light structure fracturing gate valve uses a ball screw assembly for valve operation and has a tail rod structure, which has smaller operating torque.

[0020] 4. This new ultra-high pressure light structure fracturing gate valve uses a bidirectional metal sealing gasket between the valve cover and the valve body. Its sealing surface is a spherical plane. This type of gasket has reliable sealing and can be disassembled and reused repeatedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the metal sealing gasket ring of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the multi-lip packing of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the valve body of the present invention using a rectangular groove in the middle cavity;

[0025] Figure 5 It is a schematic diagram of the external structure of the present invention.

[0026] In the figure: 1. Valve body; 2. Valve plate; 3. Valve seat; 4. Valve stem; 5. Valve cover; 6. Packing gland; 7. Bearing; 8. Valve bonnet; 9. Handwheel adapter; 10. Handwheel; 11. Ball screw assembly; 12. Lip packing; 13. Bolts and nuts; 14. Metal sealing gasket; 15. Tail rod; 16. Tail rod cover. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods. Specific embodiment one:

[0029] like Figure 1-5As shown, a new type of ultra-high pressure light structure fracturing gate valve includes a valve body 1, a valve plate 2, a valve seat assembly 3, a valve stem 4, a valve cover 5, a packing gland 6, a bearing 7, a valve cap 8, a handwheel adapter 9, a handwheel 10, a ball screw assembly 11, a lip packing 12, bolts and nuts 13, a metal sealing gasket 14, a tail rod 15, and a tail rod cover 16. The valve seat assembly 3 is installed on both sides of the valve body 1 opening, the valve plate 2 is connected to the tail rod 15 and the valve stem 4, and the valve plate 2 is installed between the two valve seat assemblies 3. A metal sealing gasket 14 is installed between the valve body 1 and the valve cover 5. The valve body 1 and the valve cover 5 are connected by bolts and nuts 13. The tail rod 15 and the valve body 2 are sealed by a lip packing 12. The upper end of the valve cover 5 is installed with a packing gland 6, a bearing 7, a ball screw assembly 11, a valve bonnet 8, a handwheel adapter 9, and a handwheel 10. The tail rod cover 16 is installed at the lower end of the valve body 1. The valve seat assembly 3 is installed on both sides of the valve body 1 opening. The valve seat sealing surface is parallel to the opening surface. The valve seat assembly 3 includes a valve seat. The valve seat sealing ring, valve plate 2 is connected to the tail rod 15 and valve stem 4. The valve plate 2 is installed between the two valve seat components 3. The two ends of the valve plate 2 are parallel to the valve seat surface. A metal sealing gasket 14 is installed between the valve body 1 and the valve cover 5. The valve body 1 and the valve cover 5 are connected by bolts and nuts 13. The pre-tightening force of the bolts and nuts assists the metal sealing gasket 14 to seal. The valve stem 4 and the valve cover 5, the tail rod 15 and the valve body 2 are sealed by a lip packing 12. The metal sealing gasket 14 is a double-acting metal It is a gasket with a spherical plane sealing surface. The lip packing 12 is a multi-lip packing. Metal-to-metal sealing is adopted between the valve seat 3 and the valve plate 2, and between the valve seat 3 and the valve body 1. A small gap design is adopted between the valve seat 3 and the valve plate 2, and between the valve seat 3 and the valve body 1. The middle cavity of the valve body 1 adopts a rectangular groove structure. The valve body 1 and the valve cover 5 are pre-pressure treated before fine machining. The sealing parts of the valve body 1 and the valve cover 5 are welded with corrosion-resistant alloy. The valve body 1 has a tail rod stuffing box and a tail rod inverted sealing structure.

[0030] The middle cavity of the valve body 1 adopts a rectangular groove structure, and before fine machining, it adopts pre-pressure treatment, which greatly reduces the wall thickness, reduces the weight of the entire valve, and saves processing and manufacturing costs. A small gap design is adopted between the valve seat 3 and the valve plate 2, and between the valve seat 3 and the valve body 1, and the lip packing 12 is a multi-lip packing. The sealing parts of the valve body 1 and the valve cover 5 are welded with corrosion-resistant alloy. The valve has better sand prevention effect and longer service life. The valve is operated by a ball screw assembly 11 and has a tail rod 15 structure with smaller operating torque. A metal sealing gasket 14 is a bidirectional metal gasket used between the valve cover 5 and the valve body 1. Its sealing surface is a spherical plane. This type of gasket seals reliably and can be disassembled and reused repeatedly. Specific embodiment two:

[0032] like Figure 1As shown, this embodiment provides a new type of fracturing gate valve, including a valve body 1, a valve plate 2, a valve seat assembly 3, a valve stem 4, a valve cover 5, a packing gland 6, a bearing 7, a valve cap 8, a handwheel adapter 9, a handwheel 10, a ball screw assembly 11, a lip packing 12, bolts and nuts 13, a metal sealing gasket 14, a tail rod 15, a tail rod cover 16, etc.

[0033] like Figure 1 As shown, this embodiment provides a new type of fracturing gate valve. When the valve needs to be opened / closed, the handwheel 10 is rotated counterclockwise / clockwise by operating the handwheel 10. The torque of the handwheel 10 is transmitted to the handwheel adapter 9. The handwheel adapter 9 drives the ball screw assembly 11. The ball screw assembly 11 converts the torque into a linear motion, thereby driving the valve stem 4 and the valve plate 2 to move up and down to complete the opening and closing of the valve. When the valve is in the open position, the valve body 1 channel, the valve plate 2 through-hole, and the valve seat assembly 3 through-hole are connected. At this time, the fluid can flow smoothly from the upstream to the downstream of the valve body; when the valve is in the closed position, the upstream and downstream through-holes of the valve body 1 and the valve seat 3 are cut off by the valve plate 2, thereby completing the cutoff of the entire fluid.

[0034] like Figure 1 As shown, this embodiment provides a new type of fracturing gate valve, the valve seat assembly 3 is installed on both sides of the opening of the valve body 1, the valve seat sealing surface is parallel to the opening surface, and the valve seat assembly 3 includes a valve seat and a valve seat sealing ring; the valve plate 2 is connected to the tail rod 15 and the valve stem 4, the valve plate 2 is installed between the two valve seat assemblies 3, the two ends of the valve plate 2 are parallel to the valve seat surface, the valve seat 3 and the valve plate 2, the valve seat 3 and the valve body 1 adopt metal-to-metal sealing, the sealing performance is better and the service life is longer, at the same time, the valve seat 3 and the valve plate 2, the valve seat 3 and the valve body 1 adopt a small gap design, which has a better sand prevention effect.

[0035] like Figure 1 As shown, this embodiment provides a new type of fracturing gate valve, in which a metal sealing gasket 14 is installed between the valve body 1 and the valve cover 5. The valve body 1 and the valve cover 5 are connected by bolts and nuts 13. The pre-tightening force of the bolts and nuts assists the metal sealing gasket 14 in sealing. At the same time, the valve body 1 and the valve cover 5 are pre-stressed before fine machining, thereby improving the pressure-bearing and fatigue resistance of the entire valve.

[0036] like Figure 2 As shown, this embodiment provides a new type of fracturing gate valve, and the lip packing 12 is a multi-lip packing with better sealing and sand resistance.

[0037] like Figure 3 As shown, this embodiment provides a new type of fracturing gate valve, the metal sealing gasket 14 is a double-acting metal gasket, and its sealing surface is a spherical plane. This type of gasket can be disassembled and reused.

[0038] like Figure 1 、 Figure 4 As shown, this embodiment provides a new type of fracturing gate valve, the valve body 1 has a tail rod stuffing box and a tail rod inverted sealing structure, and the middle cavity of the valve body 1 adopts a rectangular groove structure, which significantly reduces the weight of the entire valve.

[0039] It should be noted that the present invention is a new type of ultra-high pressure light structure fracturing gate valve. When the valve needs to be opened / closed, the handwheel 10 is rotated counterclockwise / clockwise by operating the handwheel 10. The torque of the handwheel 10 is transmitted to the handwheel adapter 9. The handwheel adapter 9 drives the ball screw assembly 11. The ball screw assembly 11 converts the torque into a linear motion, thereby driving the valve stem 4 and the valve plate 2 to move up and down to complete the opening and closing of the valve. When the valve is in the open position, the valve body 1 channel, the valve plate 2 through-hole, and the valve seat assembly 3 through-hole are connected. At this time, the fluid can flow smoothly from the upstream to the downstream of the valve body; when the valve is in the closed position, the upstream and downstream through-holes of the valve body 1 and the valve seat 3 are cut off by the valve plate 2, thereby completing the cutoff of the entire fluid.

[0040] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel ultra-high pressure light structure fracturing gate valve, comprising a valve body (1), a valve plate (2), a valve seat assembly (3), a valve stem (4), a valve cover (5), a packing gland (6), a bearing (7), a valve bonnet (8), a handwheel adapter (9), a handwheel (10), a ball screw assembly (11), a lip packing (12), bolts and nuts (13), a metal sealing gasket (14), a tail rod (15), and a tail rod cover (16), characterized in that: The valve seat assembly (3) is installed on both sides of the valve body (1) opening, the valve plate (2) is connected to the tail rod (15) and the valve stem (4), the valve plate (2) is installed between the two valve seat assemblies (3), a metal sealing ring (14) is installed between the valve body (1) and the valve cover (5), the valve body (1) and the valve cover (5) are connected by bolts and nuts (13), the tail rod (15) and the valve body (1) are sealed by lip packing (12), the packing gland (6), the bearing (7), the ball screw assembly (11), the valve cap (8), the handwheel adapter (9), and the handwheel (10) are installed on the upper end of the valve cover (5) in sequence, and the tail rod cover (16) is installed on the lower end of the valve body (1); The valve stem (4) and the valve cover (5), and the tail stem (15) and the valve body (1) are sealed by lip packing (12); The metal sealing gasket (14) is a double-acting metal gasket, and its sealing surface is a spherical plane; Metal-to-metal sealing is adopted between the valve seat and the valve plate (2), and between the valve seat and the valve body (1); a small gap design is adopted between the valve seat and the valve plate (2), and between the valve seat and the valve body (1); and the central cavity of the valve body (1) adopts a rectangular groove structure; The valve body (1) and the valve cover (5) are subjected to a pre-pressure treatment before fine machining, and the sealing parts of the valve body (1) and the valve cover (5) are subjected to a corrosion-resistant alloy surfacing treatment. The valve body (1) is provided with a tail rod stuffing box and a tail rod inverted sealing structure.

2. A novel ultra-high pressure light structure fracturing gate valve according to claim 1, characterized in that: The valve seat assembly (3) is installed on both sides of the opening of the valve body (1), and the valve seat sealing surface is parallel to the opening surface. The valve seat assembly (3) includes a valve seat and a valve seat sealing ring. The valve plate (2) is connected to the tail rod (15) and the valve stem (4). The valve plate (2) is installed between the two valve seat assemblies (3), and both ends of the valve plate (2) are parallel to the valve seat sealing surface.

3. The novel ultra-high pressure light structure fracturing gate valve according to claim 1 is characterized by: The lip-shaped packing (12) is a multi-lip packing.

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