An improved oil wellhead valve

Abstract

This utility model relates to the field of oil well technology, and in particular to an improved oil wellhead valve, comprising a valve body, a mounting base, and an extension column. The mounting base is fixedly connected to the top of the valve body, and the extension column is fixedly connected to the top of the mounting base. The inner side of the extension column is provided with a valve turning connection structure, and the inner side of the mounting base is provided with a wellhead valve opening and closing structure. In this improved oil wellhead valve, the sealing ring is made of rubber material, which improves the sealing performance at the connection between the connecting pipe and the mounting flange. The support rod guides the anti-clogging mesh, which is made of stainless steel metal mesh plate, to be installed side-by-side inside the connecting pipe. Normally, the collected crude oil can flow through the oil draining chamber, while mineral impurities in the crude oil are blocked by the anti-clogging mesh and prevented from entering the finer oil passages. This effectively protects the inner side of the oil wellhead valve from clogging and improves the valve's unblocking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil well technology, specifically to an improved oil wellhead valve. Background Technology

[0002] An oil wellhead is a surface device primarily used to suspend the tubing string lowered into the well, creating a sealed annular space between the tubing and casing strings to effectively separate the pressures of the tubing and casing. It effectively controls, regulates, and releases underground fluid output according to the production needs of the oil well, ensuring the smooth operation of daily production processes such as drilling, oil and casing pressure data collection, testing, and paraffin removal. The oil wellhead is an indispensable part of the oil and gas extraction system, directly impacting the effective development and utilization of oil and gas resources.

[0003] For example, the authorized announcement number "CN202023534U" is named a double-proof one-way valve. Through or with an unstable force point, it can prevent crude oil from flowing back out of the one-way valve, thus playing an anti-theft role. It can replace the original one-way valve and can effectively prevent crude oil theft, greatly reducing the losses of oil plants. However, the existing double-proof one-way valves are generally installed at the wellhead of the oil well and directly control the outflow of the extracted natural crude oil. Natural crude oil generally contains a lot of impurities and mineral components. If it is discharged at the wellhead valve without undergoing preliminary filtration, it is easy for impurities to adhere to the inside of the wellhead valve, causing blockage and accumulation, ultimately affecting the valve clearing efficiency of the double-proof one-way valve. Utility Model Content

[0004] The purpose of this invention is to solve the problem of low flow efficiency of the double-proof single-flow valve, and to propose an improved oil wellhead valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An improved oil wellhead valve is designed, comprising a valve body, a mounting base, and an extension column. The mounting base is fixedly connected to the top of the valve body, and the extension column is fixedly connected to the top of the mounting base. The inner side of the extension column is provided with a valve turning docking structure, and the inner side of the mounting base is provided with a wellhead valve opening and closing structure. The two sides of the valve body are provided with oil wellhead filtering and oil conveying structures.

[0007] Preferably, the wellhead valve opening and closing structure includes a turning shaft and a sealing seat. The turning shaft is rotatably connected to the inner side of the mounting seat. A ball valve core is fixedly connected to the lower end of the turning shaft. An oil passage groove is fixedly opened inside the ball valve core. The sealing seat is fixedly installed inside the valve body. The inner side of the sealing seat is movably connected to the outer wall of the ball valve core.

[0008] When using the wellhead valve, this setup allows for valve opening and closing controlled by rotating the control head. Specifically, when the ball valve core is horizontally positioned within the sealed seat, it blocks the connection between the oil passage and the connecting pipes on both sides, thus closing the wellhead valve. When the operator uses a wrench or similar tool to rotate the control head, the control head drives the lower control shaft to rotate. This causes the ball valve core to rotate a certain angle within the sealed seat, connecting the oil passage to the connecting pipes on both sides, thus opening the wellhead valve.

[0009] Preferably, the oil wellhead filtration and oil delivery structure includes connecting pipes and anti-clogging nets. Two connecting pipes are fixedly connected to both sides of the outer wall of the valve body. Sealing rings are fixedly connected to the ends of the two connecting pipes. Two support rods are fixedly connected inside the two connecting pipes. Two anti-clogging nets are movably connected below the two support rods. An oil-draining cavity is fixedly opened inside the two connecting pipes.

[0010] The sealing ring is made of rubber and can improve the sealing performance at the connection between the connecting pipe and the mounting flange. The support rod can guide the anti-clogging net to be installed side by side inside the connecting pipe. The anti-clogging net is made of stainless steel metal mesh plate. The collected crude oil can flow through the normal oil venting cavity. Mineral impurities in the crude oil will be blocked by the anti-clogging net and will not enter the finer oil passage. This can protect the inside of the wellhead valve from clogging to a certain extent.

[0011] Preferably, the outer sides of the two sealing rings are fixedly connected to mounting flanges.

[0012] This installation flange allows for connection and installation with the wellhead pipeline. The flange can be removed along with the valve body, allowing for manual cleaning of impurities on the anti-clogging mesh in the valve connecting pipe after disassembly.

[0013] Preferably, the valve turning dock structure includes a turning head and a sleeve, the sleeve is fixedly sleeved inside the extension column, the inner side of the sleeve is rotatably connected to a connecting shaft, and the top end of the connecting shaft is fixedly connected to the turning head.

[0014] This sleeve, located inside the extension column, serves to reinforce the rotation of the internal screw head. The screw head can be used with a wrench to tighten it. The lower end of the screw head drives the connecting shaft to rotate, and the lower end of the connecting shaft is connected to the top end of the screw head, so the screw head can drive the lower screw shaft to rotate.

[0015] Preferably, the lower end of the connecting shaft is fixedly connected to the top end of the rotating shaft.

[0016] The improved wellhead valve proposed in this utility model has the following advantages: the sealing ring is made of rubber material, which can improve the sealing performance at the connection between the connecting pipe and the mounting flange; the support rod can guide the anti-clogging net to be installed side by side inside the connecting pipe; the anti-clogging net is made of stainless steel metal mesh plate; the collected crude oil can flow through the normal oil venting chamber; mineral impurities in the crude oil will be blocked by the anti-clogging net and will not enter the finer oil passage. This can protect the inside of the wellhead valve from clogging to a certain extent and improve the valve unblocking efficiency of the wellhead valve. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 A frontal sectional view;

[0019] Figure 3 for Figure 1 Top view diagram;

[0020] Figure 4 for Figure 2 Enlarged sectional view of section A in the middle;

[0021] Figure 5 for Figure 2 Enlarged sectional view of section B.

[0022] In the diagram: 1. Valve body, 2. Mounting seat, 3. Extension column, 4. Valve turning and connecting structure, 41. Turning head, 42. Connecting shaft, 43. Sleeve, 5. Oil wellhead filtration and oil delivery structure, 51. Connecting pipe, 52. Sealing ring, 53. Support rod, 54. Anti-clogging mesh, 55. Oil draining chamber, 6. Mounting flange, 7. Wellhead valve opening and closing structure, 71. Turning shaft, 72. Oil passage groove, 73. Ball valve core, 74. Sealing seat. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] Please see Figure 1-5 In this embodiment, an improved oil wellhead valve includes a valve body 1, a mounting base 2, and an extension column 3. The mounting base 2 is fixedly connected to the top of the valve body 1, and the extension column 3 is fixedly connected above the mounting base 2. The inner side of the extension column 3 is provided with a valve turning docking structure 4. The extension column 3 is made of high-strength carbon steel alloy material. The extension column 3 is welded to the inside of the top of the mounting base 2 to protect the rotation of the turning shaft 71. The inner side of the mounting base 2 is provided with a wellhead valve opening and closing structure 7, and the two sides of the valve body 1 are provided with oil wellhead filter and oil delivery structures 5.

[0025] The wellhead valve opening and closing structure 7 includes a turning shaft 71 and a sealing seat 74. The turning shaft 71 is rotatably connected to the inner side of the mounting base 3. The lower end of the turning shaft 71 is fixedly connected to a ball valve core 73. When the ball valve core 73 is horizontally placed in the sealing seat 74, it will block the connection between the oil passage groove 72 and the two connecting pipes 51, thus closing the wellhead valve. When the operator uses a wrench or other tools to turn the turning head 41, the turning head 41 will drive the lower turning shaft 71 to rotate. The turning shaft 71 causes the ball valve core 73 to rotate a certain angle inside the sealing seat 74, and the oil passage groove 72 is connected to the two connecting pipes 51, thus opening the oil wellhead valve. The ball valve core 73 has an oil passage groove 72 fixedly opened inside. The sealing seat 74 is fixedly installed inside the valve body 1, and the inner side of the sealing seat 74 is movably connected to the outer wall of the ball valve core 73.

[0026] The oil wellhead filtration and oil delivery structure 5 includes connecting pipes 51 and anti-clogging nets 54. Two connecting pipes 51 are fixedly connected to both sides of the outer wall of the valve body 1. Sealing rings 52, made of rubber, are fixedly connected to the ends of the two connecting pipes 51. The sealing rings 52 improve the sealing performance at the connection between the connecting pipes 51 and the mounting flange 4. Two support rods 53 are fixedly connected inside the two connecting pipes 51. The support rods 53 guide the anti-clogging nets 54 to be arranged side-by-side inside the connecting pipes 51. Two anti-clogging nets 54 are movably connected below the two support rods 53. The anti-clogging mesh 54 is made of stainless steel metal mesh plate. The two connecting pipes 51 have an oil-draining cavity 55 fixedly opened inside. Normally, the collected crude oil can flow through the oil-draining cavity 55. Mineral impurities in the crude oil will be blocked by the anti-clogging mesh 54 and will not enter the finer oil passage 75. The outer side of the two sealing rings 52 is fixedly connected to the mounting flange 6. The mounting flange 6 can be connected to the wellhead pipeline for installation and use. The mounting flange 6 can be disassembled along with the valve body. In this way, the impurities on the anti-clogging mesh 54 in the valve connecting pipe 51 after disassembly can be manually cleaned.

[0027] The sealing ring 52 is made of rubber material. The sealing ring 52 can improve the sealing performance of the connection between the connecting pipe 51 and the mounting flange 4. The support rod 53 can guide the anti-blocking net 54 to be arranged side by side inside the connecting pipe 51. The anti-blocking net 54 is made of stainless steel metal mesh plate. The collected crude oil can flow through the normal oil dredging cavity 55. The mineral impurities in the crude oil will be blocked by the anti-blocking net 54 and will not enter the finer oil passage 75. This can protect the inside of the oil wellhead valve to a certain extent from clogging and improve the valve unblocking efficiency of the oil wellhead valve.

[0028] The valve turning docking structure 4 includes a turning head 41 and a sleeve 43. The sleeve 43 is fixedly fitted inside the extension column 3. The sleeve 43 inside the extension column 3 serves to reinforce the rotation of the internal turning head 41. The turning head 41 can be used with a wrench to turn. The lower end of the turning head 41 drives the connecting shaft 42 to rotate. The lower end of the connecting shaft 42 is connected to the top end of the turning shaft 71. In this way, the turning head 41 can drive the lower turning shaft 71 to rotate. The inner side of the sleeve 43 is rotatably connected to the connecting shaft 42. The top end of the connecting shaft 42 is fixedly connected to the turning head 41. The lower end of the connecting shaft 42 is fixedly connected to the top end of the turning shaft 71.

[0029] Working principle:

[0030] The improved wellhead valve is used to connect and fix to the pipeline connected to the wellhead. The flow of oil inside the pipeline is controlled by the rotation of the valve body inside the valve.

[0031] The sleeve 43 inside the extension column 3 serves to reinforce the rotation of the internal screw head 41. The screw head 41 can be used with a wrench to screw. The lower end of the screw head 41 drives the connecting shaft 42 to rotate, and the lower end of the connecting shaft 42 is connected to the top end of the screw shaft 71. In this way, the screw head 41 can drive the lower screw shaft 71 to rotate.

[0032] When using the wellhead valve, the valve can be opened and closed by rotating the screw head 41. When the ball valve core 73 is horizontally positioned in the sealing seat 74, it will block the connection between the oil passage 72 and the two connecting pipes 51, thus closing the wellhead valve. When the operator uses a wrench or other tools to turn the screw head 41, the screw head 41 will drive the lower screw shaft 71 to rotate. The screw shaft 71 causes the ball valve core 73 to rotate a certain angle inside the sealing seat 74, connecting the oil passage 72 with the two connecting pipes 51, thus opening the wellhead valve.

[0033] The sealing ring 52 is made of rubber material. The sealing ring 52 can improve the sealing performance of the connection between the connecting pipe 51 and the mounting flange 4. The support rod 53 can guide the anti-blocking net 54 to be arranged side by side inside the connecting pipe 51. The anti-blocking net 54 is made of stainless steel metal mesh plate. The collected crude oil can flow through the normal oil dredging cavity 55. The mineral impurities in the crude oil will be blocked by the anti-blocking net 54 and will not enter the finer oil passage 75. This can protect the inside of the oil wellhead valve to a certain extent from clogging and improve the valve unblocking efficiency of the oil wellhead valve.

[0034] Two sealing rings 52 are fixedly connected to mounting flanges 6 on their outer sides. Mounting flanges 6 can be connected to the wellhead pipeline for installation. Mounting flanges 6 can be removed along with the valve body, allowing for manual cleaning of impurities on the anti-clogging mesh 54 in the valve connecting pipe 51 after disassembly. Although this utility model has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An improved oil wellhead valve, comprising a valve body (1), a mounting base (2), and an extension column (3), wherein the mounting base (2) is fixedly connected to the top of the valve body (1), and the extension column (3) is fixedly connected above the mounting base (2), characterized in that: The inner side of the extension column (3) is provided with a valve turning docking structure (4), the inner side of the mounting base (2) is provided with a wellhead valve opening and closing structure (7), and the two sides of the valve body (1) are provided with an oil wellhead filtration and oil transportation structure (5).

2. The improved wellhead valve according to claim 1, characterized in that: The wellhead valve opening and closing structure (7) includes a turning shaft (71) and a sealing seat (74). The turning shaft (71) is rotatably connected to the inner side of the mounting base (2). The lower end of the turning shaft (71) is fixedly connected to a ball valve core (73). An oil passage groove (72) is fixedly opened inside the ball valve core (73). The sealing seat (74) is fixedly installed inside the valve body (1). The inner side of the sealing seat (74) is movably connected to the outer wall of the ball valve core (73).

3. The improved wellhead valve according to claim 1, characterized in that: The oil wellhead filtration and oil delivery structure (5) includes a connecting pipe (51) and an anti-clogging net (54). The two connecting pipes (51) are fixedly connected to both sides of the outer wall of the valve body (1). The ends of the two connecting pipes (51) are fixedly connected to a sealing ring (52). The interior of the two connecting pipes (51) is fixedly connected to two support rods (53). The lower part of the two support rods (53) is movably connected to two anti-clogging nets (54). The interior of the two connecting pipes (51) is fixedly provided with an oil-draining cavity (55).

4. The improved wellhead valve according to claim 3, characterized in that: The outer sides of the two sealing rings (52) are fixedly connected to mounting flanges (6).

5. The improved wellhead valve according to claim 1, characterized in that: The valve turning docking structure (4) includes a turning head (41) and a sleeve (43). The sleeve (43) is fixedly sleeved inside the extension column (3). A connecting shaft (42) is rotatably connected to the inner side of the sleeve (43). The turning head (41) is fixedly connected to the top end of the connecting shaft (42).

6. The improved wellhead valve according to claim 5, characterized in that: The lower end of the connecting shaft (42) is fixedly connected to the top end of the rotating shaft (71).

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