Tool for taking out valve seat of built-in manifold flat valve

Abstract

The utility model belongs to the technical field of oil and gas well maintenance, and relates to a built-in manifold flat valve seat taking-out tool. The taking-out tool comprises a lead screw, the working end of the lead screw is movably connected with a locking clamping block, the locking clamping block is of a semi-cylindrical structure, a protrusion is arranged on the circumferential edge of the semi-cylindrical structure, and the protrusion is matched with a valve seat inner ring groove of a flat valve seat. Floating clamping blocks are in threaded connection with the positions, located on the upper portions of the locking clamping blocks, of the lead screw, the structure of the floating clamping blocks is the same as that of the locking clamping blocks, and the floating clamping blocks are symmetrically arranged on the lead screw. The utility model provides a method for taking out the valve seat by entering the valve cavity from the upper part of the valve body of the flat valve, clamping the clamping block in the rectangular ring groove in the valve seat and moving the screw rod. When the manifold is conventionally overhauled and maintained, the valve seats of the flat valves can be taken out for overhaul and maintenance without disassembling the flat valves of the manifold, and the method has important significance for improving the production efficiency and protecting the safety of equipment and personnel.

Description

Technical Field

[0001] This utility model belongs to the field of oil and gas well maintenance technology, and relates to a tool for removing the seat of a built-in manifold flat valve. Background Technology

[0002] Choke and kill manifolds are one of the main well control equipment for handling overflows, kicks, and blowouts. The slab valve is a crucial component of the choke and kill manifold, controlling the flow path through a gate valve to direct drilling fluid flow in a specified direction, thereby controlling and maintaining well pressure. Typically, the working medium for slab valves is corrosive, sand-carrying drilling fluid. After a period of use, the metal sealing surfaces of the valve plate and seat are easily damaged. Furthermore, without prolonged maintenance, the valve seat may corrode together with the valve body, causing the slab valve to jam and become unable to open. Therefore, it is necessary to periodically remove the valve seat for maintenance and inspection of the slab valve to ensure the safety and reliability of the choke and kill manifold. Currently, high-pressure choke and kill manifolds are maintained as a whole, without the need for complete disassembly of the slab valve. Removing the slab valve seat relies on the rectangular annular grooves on the inner and outer cylindrical surfaces of the valve seat. Figure 1 , Figure 2 and Figure 3 As shown, due to the compact valve body structure and space constraints, only a flathead screwdriver can be used to pry or hammer the valve seat out by gripping the rectangular annular groove of the valve seat from the top of the valve body. If excessive force is applied, the valve seat body can easily be damaged, and once the annular groove is damaged, the screwdriver is prone to slipping out, making it difficult to remove the valve seat from the flat valve chamber. This method of removing the valve seat is unreliable. Currently, there are no dedicated tools for removing and maintaining the valve seat of the flat manifold valve in the workshop's throttling and pressure-reducing pipeline. Therefore, a dedicated tool for removing the valve seat of the flat manifold valve is urgently needed.

[0003] In the prior art, Chinese utility model patent CN203305157U, entitled "A Manual Flat Valve Seat Disassembly and Assembly Device," replaces the existing hexagonal nut with a rotating module and a lever, allowing the valve seat to be disassembled and assembled using the lever. However, this device uses a relatively large pull block and lever, and the valve seat is disassembled and assembled from the valve bore, making it unsuitable for the disassembly and maintenance of integrated manifold flat valves. Chinese utility model patent CN208409738U, entitled "Flat Valve Seat Disassembly and Assembly Tool," uses a lever with a baffle to connect the valve seat from within the fluid channel, completing the disassembly and assembly of the valve seat and valve plate. However, this requires complete disassembly of the manifold flat valve, which is not suitable for on-site use. Chinese invention patent application CN112096892A, entitled "A Flat Valve Seat Disassembly and Assembly Tool," also uses a fluid channel connecting the valve body from the inlet and outlet ends. The method of connecting the valve seat to complete the assembly and disassembly of the valve plate and valve seat, although it has some visualization design, still requires complete disassembly of the flat valve before it can be used, which does not meet the field use conditions; Chinese invention patent application CN101362320A, "A Gate Valve Valve Plate and Valve Seat Assembly and Disassembly Tool", adopts an assembly and disassembly tool with a push mechanism and an expansion mechanism. On both sides of the fluid channel, the pull blocks are used to vertically embed into the valve seat groove to complete the assembly and disassembly of the valve seat. The assembly and disassembly of valve seats of a certain diameter and different pressure levels can be completed by lengthening and shortening the length of the pull rod and push rod, but it is not suitable for the field maintenance mode of removing the valve seat from the top of the valve body. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problem of the lack of effective special matching tools when removing the valve seat from the top of the valve body for inspection and maintenance in the field, and to provide a built-in manifold flat valve seat removal tool.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a built-in manifold flat valve seat removal tool, including a lead screw, the working end of which is movably connected to a locking block, the locking block being a semi-cylindrical structure, the periphery of which is provided with a protrusion, the protrusion cooperating with the inner annular groove of the flat valve seat; a floating block is threadedly connected to the lead screw at the upper position of the locking block, the floating block having the same structure as the locking block and being symmetrically arranged on the lead screw.

[0007] Further improvements are made in the following aspects:

[0008] A rectangular stepped surface is provided at the top of the non-operating end of the lead screw.

[0009] The lead screw is provided with a fixed sleeve mounting ring groove, a locking block limiting cylindrical step, a floating block connecting male thread, and a floating block limiting cylindrical step in sequence from the top of the operating end.

[0010] A fixing sleeve is installed in the fixing sleeve mounting ring groove.

[0011] A through hole is provided at the central axis of the locking block, and the through hole is fitted between the locking block limiting cylindrical step and the fixing sleeve mounting ring groove on the lead screw.

[0012] A threaded hole is provided at the central axis of the floating block, and the threaded hole is fitted to the male thread of the floating block connection.

[0013] The locking block includes a first step and a second step; the radius of the second step is smaller than the radius of the first step; the protrusion is disposed on the periphery of the second step.

[0014] The outer contour of the protrusion is a similar semicircle to the outer circumference contour of the semi-cylindrical structure.

[0015] The locking block is made of stainless steel, alloy steel, carbon steel, tool steel, or titanium alloy.

[0016] The lead screw, floating block, and fixed sleeve are made of the same material as the locking block.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model discloses a built-in manifold flat valve seat removal tool. A locking block and a floating block are provided on the operating end of the lead screw. The locking block can only rotate around the lead screw, while the floating block is threadedly connected to the lead screw. By rotating the lead screw, the position of the floating block on the lead screw can be adjusted, thereby adjusting the distance between the floating block and the locking block. When inspecting a throttling and pressure manifold flat valve and removing the valve seat, the lead screw is rotated to move the floating block closer to the locking block on the lead screw. After the floating block and the locking block are in contact, the tool is inserted into the valve body chamber from the top of the flat valve. The protrusions on the floating block and the locking block face inwards towards the through hole of the valve seat. After the protrusions engage with the inner annular groove of the valve seat, the lead screw is rotated in the opposite direction to rotate the handle. The floating block moves upward and, similarly, engages stably with the inner annular groove of the valve seat. The cylindrical handle of the movable lead screw is then used to remove the valve seat, achieving valve seat removal and maintenance without disassembling the manifold flat valve. This invention replaces the traditional method of removing valve seats by using a screwdriver to pry open the valve seat annular groove and then a hammer, thus avoiding damage to the valve seat and valve cavity metal sealing surface due to misoperation and the resulting personnel safety risks. Furthermore, for the overall maintenance of throttling and pressure manifolds, a method is proposed that involves entering the valve cavity from the top of the flat valve body, using a locking block to engage the valve seat in the rectangular annular groove, and then removing the valve seat by moving a screw. During routine maintenance of the manifold, the valve seat can be removed and maintained without disassembling the individual flat valves, which is of great significance for improving production efficiency and protecting equipment and personnel safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a diagram showing the usage state of a built-in manifold flat valve seat removal tool according to this utility model;

[0021] Figure 2 This is a schematic diagram of the flat plate valve body;

[0022] Figure 3 Schematic diagram of a flat plate valve sealing seat;

[0023] Figure 4 This is an overall structural diagram of a built-in manifold flat valve seat removal tool according to the present invention;

[0024] Figure 5 This is a structural diagram of the lead screw in a built-in manifold flat valve seat removal tool of this utility model;

[0025] Figure 6 This is a structural diagram of the floating locking block in a built-in manifold flat valve seat removal tool of this utility model;

[0026] Figure 7 This is a structural diagram of the locking block in a built-in manifold flat valve seat removal tool of this utility model;

[0027] Figure 8 This is a structural diagram of the fixing sleeve in a built-in manifold flat valve seat removal tool of this utility model;

[0028] Figure 9 This is a three-dimensional perspective view of a built-in manifold flat valve seat removal tool according to this utility model.

[0029] The components include: 1. Flat valve body; 101. Valve seat seal; 2. Flat valve seat; 201. Inner annular groove of valve seat; 202. Metal sealing surface between valve seat and valve body; 203. Sealing surface between valve seat and valve plate; 3. Valve seat removal tool; 301. Lead screw; 3011. Lead screw rotation handle; 3012. Floating block limiting cylindrical step; 3013. Floating block connecting male thread; 3014. Locking block limiting cylindrical step; 3015. Fixed sleeve mounting annular groove; 302. Floating block; 3021. Floating block threaded hole; 3022. Semi-circular annular protrusion on top of floating block; 303. Locking block; 3031. Locking block through hole; 3032. Semi-circular annular protrusion on top of locking block; 304. Fixed sleeve; 3041. Inner annular surface of fixed sleeve; 3042. Outer annular surface of fixed sleeve. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] See Figure 4 This utility model discloses a tool for removing the seat of a built-in manifold flat valve, including a lead screw 301. A locking block 303 is movably connected to the working end of the lead screw 301. The locking block 303 has a semi-cylindrical structure with a protrusion on its circumference, which engages with the inner annular groove 201 of the flat valve seat. A floating block 302 is threadedly connected to the lead screw 301 above the locking block 303. The floating block 302 has the same structure as the locking block 303 and is symmetrically arranged on the lead screw 301. The locking block 303 is made of stainless steel, alloy steel, carbon steel, tool steel, or titanium alloy. The materials of the lead screw 301, floating block 302, and fixing sleeve 304 are the same as those of the locking block 303.

[0038] See Figure 5 The lead screw 301 is provided with a fixed sleeve mounting ring groove 3015, a locking block limiting cylindrical surface step 3014, a floating block connecting male thread 3013, and a floating block limiting cylindrical surface step 3012 in sequence from the top of the operating end; the top of the non-operating end of the lead screw 301 is provided with a rectangular step surface, which can be used to tighten or loosen the thread by hand when tools are added.

[0039] See Figure 6 and Figure 7 The locking block 303 has a through hole at its central axis, which is fitted onto the lead screw 301 between the locking block limiting cylindrical step 3014 and the fixing sleeve mounting annular groove 3015. The floating block 302 has a threaded hole at its central axis, which is fitted onto the floating block connecting male thread 3013.

[0040] See Figure 8 A fixing sleeve 304 is installed in the fixing sleeve mounting ring groove 3015.

[0041] See Figure 9 The locking block 303 includes a first step and a second step; the radius of the second step is smaller than the radius of the first step; the protrusion is disposed on the periphery of the second step. The outer contour of the protrusion is a similar semicircle to the outer circumferential contour of the semi-cylindrical structure.

[0042] This utility model discloses a built-in manifold flat valve seat removal tool. A locking block and a floating block are provided on the operating end of the lead screw. The locking block can only rotate around the lead screw, while the floating block is threadedly connected to the lead screw. By rotating the lead screw, the position of the floating block on the lead screw can be adjusted, thereby adjusting the distance between the floating block and the locking block. When inspecting a throttling and pressure manifold flat valve and removing the valve seat, the lead screw is rotated to move the floating block closer to the locking block on the lead screw. After the floating block and the locking block are in contact, the tool is inserted into the valve body chamber from the top of the flat valve. The protrusions on the floating block and the locking block face inwards towards the through hole of the valve seat. After the protrusions engage with the inner annular groove of the valve seat, the lead screw is rotated in the opposite direction to rotate the handle. The floating block moves upward and, similarly, engages stably with the inner annular groove of the valve seat. The cylindrical handle of the movable lead screw is then used to remove the valve seat, achieving valve seat removal and maintenance without disassembling the manifold flat valve. This invention replaces the traditional method of removing valve seats by using a screwdriver to pry open the valve seat annular groove and then a hammer, thus avoiding damage to the valve seat and valve cavity metal sealing surface due to misoperation and the resulting personnel safety risks. Furthermore, for the overall maintenance of throttling and pressure manifolds, a method is proposed that involves entering the valve cavity from the top of the flat valve body, using a locking block to engage the valve seat in the rectangular annular groove, and then removing the valve seat by moving a screw. During routine maintenance of the manifold, the valve seat can be removed and maintained without disassembling the individual flat valves, which is of great significance for improving production efficiency and protecting equipment and personnel safety.

[0043] The working process of this utility model is as follows:

[0044] This utility model includes a lead screw 301, a floating block 302, a locking block 303, and a fixing sleeve 304. The lead screw 301 runs through the entire tool from front to back, and its main body is cylindrical. From the tail to the front, it is provided with a lead screw rotating handle 3011, a floating block limiting cylindrical surface step 3012, a connecting male thread 3013, a limiting cylindrical surface step 3014, and an annular groove 3015. The rotating handle 3011 has a rectangular stepped surface, which can be used to tighten or loosen the thread when it is impossible to tighten or loosen it manually. The floating block 302 is a floating block. The floating block 303 is a fixed sleeve 304. The main body of the movable locking block 302 is semi-circular, and the outer circle has a stepped surface of the same shape. The top outer circumference of the small semi-circular locking block has a semi-circular annular protrusion that can cooperate with the rectangular annular groove in the valve seat. In addition, the locking block 303 has a through hole perpendicular to the cross section, and the floating block 302 has an internal thread at the same position. The floating block 302 can cooperate with the external thread of the lead screw to realize the function of moving up and down. The main body of the fixed sleeve 304 is cylindrical and is placed in the annular groove at the top of the lead screw. The cylindrical step of the lead screw plays a limiting role for the locking block.

[0045] When overhauling a throttling and kill manifold flat valve, and the valve seat needs to be removed, the floating block 302 can be adjusted by rotating the screw and rotating the handle 301. After the floating block 302 is engaged with the locking block 303, the tool is inserted into the valve body chamber from the top of the flat valve. The small semi-circular block is placed inside the valve seat through hole. After the semi-circular protrusion of the locking block 303 engages with the inner annular groove 201 of the valve seat, the screw and rotating handle are rotated in the opposite direction. The floating block 302 moves upward and is also engaged with the inner annular groove 201 of the valve seat. Then, the cylindrical handle of the screw can be moved to remove the valve seat, thus completing the removal, maintenance, and repair of the valve seat without disassembling the manifold flat valve.

[0046] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tool for removing the seat of a built-in manifold flat valve, characterized in that, The device includes a lead screw (301), the working end of which is movably connected to a locking block (303). The locking block (303) is a semi-cylindrical structure with a protrusion on its circumference. The protrusion engages with the inner annular groove (201) of the valve seat of the flat plate valve. A floating block (302) is threadedly connected to the lead screw (301) at the upper position of the locking block (303). The floating block (302) has the same structure as the locking block (303) and is symmetrically arranged on the lead screw (301).

2. The built-in manifold flat valve seat removal tool according to claim 1, characterized in that, A rectangular stepped surface is provided at the top of the non-operating end of the lead screw (301).

3. The built-in manifold flat valve seat removal tool according to claim 1, characterized in that, The lead screw (301) is provided with a fixed sleeve mounting ring groove (3015), a locking block limiting cylindrical surface step (3014), a floating block connecting male thread (3013), and a floating block limiting cylindrical surface step (3012) sequentially from the top of the operating end.

4. The built-in manifold flat valve seat removal tool according to claim 3, characterized in that, A fixing sleeve (304) is installed in the fixing sleeve mounting annular groove (3015).

5. The built-in manifold flat valve seat removal tool according to claim 3, characterized in that, The locking block (303) has a through hole at its central axis. The through hole is fitted between the locking block limiting cylindrical step (3014) and the fixing sleeve mounting annular groove (3015) on the screw (301).

6. The built-in manifold flat valve seat removal tool according to claim 3, characterized in that, The floating block (302) has a threaded hole at its central axis, which is fitted to the male thread (3013) of the floating block connection.

7. The built-in manifold flat valve seat removal tool according to claim 1, characterized in that, The locking block (303) includes a first step and a second step; the radius of the second step is smaller than the radius of the first step; the protrusion is disposed on the periphery of the second step.

8. The built-in manifold flat valve seat removal tool according to claim 1, characterized in that, The outer contour of the protrusion is a similar semicircle to the outer circumference contour of the semi-cylindrical structure.

9. The built-in manifold flat valve seat removal tool according to claim 1, characterized in that, The locking block (303) is made of stainless steel, alloy steel, carbon steel, tool steel or titanium alloy.

10. The built-in manifold flat valve seat removal tool according to claim 9, characterized in that, The materials of the lead screw (301), floating block (302) and fixed sleeve (304) are the same as those of the locking block (303).

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