Complete device of built-in check valve of oil nozzle sleeve and replacement tool of built-in check valve

Abstract

The utility model discloses a complete device of a built-in check valve of an oil nozzle sleeve and a replacing tool of the built-in check valve, which comprises the built-in check valve and a strong magnetic special wrench, one end of the built-in check valve is provided with a wrench lug, and the wrench lug is made of a magnetic material; the special strong magnetic wrench comprises a connecting rod, and a wrench handle clamping head is arranged at the lower end of the connecting rod. A clamping groove is formed in the end, away from the connecting rod, of the wrench handle clamping head, and a permanent magnet is arranged at the bottom of the clamping groove; the wrench protruding block can be matched with the clamping groove. According to the utility model, the clamping groove of the special wrench for the strong magnet is completely matched with the cross section of the wrench lap lug of the built-in check valve, so that the built-in check valve is prevented from falling into the oil nozzle sleeve under the action of the strong magnet.

Description

Technical Field

[0001] This utility model relates to the field of oil well tool technology, specifically a complete set of equipment for a nozzle sleeve with a built-in one-way valve and its replacement tool. Background Technology

[0002] In oilfields, some wells experience low production, high crude oil viscosity, and high back pressure, causing numerous inconveniences, especially in winter when frequent pipeline flushing is necessary to clear blockages. To reduce back pressure and ensure normal production, multiple wells often share a single pipeline. However, due to various reasons, many wells still lack wellhead check valves. This means that if a well's tubing, pump, or valve leaks, fluid from other wells can backflow into that well during shutdowns or severe leakage, resulting in production losses. If the backflowed fluid is incompatible with the formation, it can reduce reservoir permeability and negatively impact future development.

[0003] The current on-site method is as follows: when a production decline is detected, production is checked well by well to eliminate abnormal wells; after identifying a leaking well through dynamometer card analysis, the back pressure valve and production valve of that well are shut off. This process is time-consuming and results in significant production losses. If each well were shut down to install a check valve, the workload would be enormous, requiring hot work, increasing the labor intensity of employees, and affecting well production and well operating time. This cannot be completed in the short term.

[0004] Announcement No. CN219404133U discloses a solenoid valve disassembly fixture, including a support column, a support beam, a nylon guide sleeve, a handle pin, a handle seat, a ball screw assembly, and a pull head. Two support columns are present, and the support beam is threaded to the upper end of the support column. A through hole is provided on the support beam, and the nylon guide sleeve is fixed within the through hole. The handle pin is interference-fitted into a blind hole in the handle seat. The ball screw assembly consists of a ball screw and a ball screw assembly nut. The ball screw passes through the handle seat and the nylon guide sleeve, and the ball screw assembly nut is mounted on the ball screw and fixed within a hexagonal hole in the handle seat. A pull head is welded to the lower end of the ball screw, and the pull head has an annular groove.

[0005] The existing technology is used for pulling and disassembling solenoid valves, and the technical solution is different from that of this patent.

[0006] Publication No. CN212146273U discloses a disassembly device, including a support base, a screw, and a pull claw component. The support base is provided with a threaded hole that mates with the screw, and the pull claw component is provided at one end of the screw. A magnet is provided on the edge of the support base for attracting and connecting the disassembly device with the structure to be disassembled.

[0007] The magnets used in the prior art for positioning and fixing the support base are different from those in this patent.

[0008] Announcement No. CN211278256U discloses a ball valve installation and disassembly device, comprising a main body, an operation button embedded on the front surface of the main body, a sliding cavity inside the main body, a slide rod slidably connected inside the sliding cavity, a movable cavity inside the slide rod, a lead screw threadedly connected to the inner wall of the movable cavity, the top of the lead screw passing through the movable cavity and extending upward through the main body, a stepper motor fixedly connected to the top of the lead screw, the bottom of the slide rod extending downward through the main body, a magnet sleeve welded to the bottom of the slide rod, an electromagnet embedded in the bottom of the magnet sleeve, a plug connected to one side of the upper end of the main body via a wire, and electric push rods embedded on both the left and right sides of the lower end of the main body, the other end of the electric push rods being connected to a lever via a screw.

[0009] In this prior art, the electromagnet occupies the entire space inside the magnet sleeve and can only be used to disassemble the valve ball, not the check valve.

[0010] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0011] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a complete set of equipment for a single-flow valve built into an oil nozzle sleeve and its replacement tool.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] On one hand, this utility model provides a complete set of equipment for a nozzle sleeve with a built-in one-way valve and its replacement tool, including a built-in one-way valve and a strong magnetic wrench. One end of the built-in one-way valve is provided with a wrench protrusion, which is made of magnetic material. The strong magnetic wrench includes a connecting rod, and the lower end of the connecting rod is provided with a wrench locking connector. The wrench locking connector has a locking groove at the end away from the connecting rod, and a permanent magnet is provided at the bottom of the locking groove. The wrench protrusion can cooperate with the locking groove.

[0014] Furthermore, the connecting rod is provided with a radial through hole, and a movable lever is installed in the radial through hole; lever baffles are installed at both ends of the movable lever, and the movable lever can slide in the radial through hole.

[0015] Furthermore, the permanent magnet is connected to the lever connector via a fixing screw, which is located at the center of the engagement groove.

[0016] Furthermore, the lever connector is made of magnetic material.

[0017] Furthermore, the built-in single-flow valve includes a valve cover, one end of which is connected to a hollow connector and the other end to an end cap, and a lever protrusion is provided on the end of the end cap away from the valve cover.

[0018] Furthermore, the valve cover has a cylindrical structure, the inside of the valve cover is a valve cavity, the side wall of the valve cover is provided with an oil outlet hole, and the valve cavity is provided with a valve ball and a spring;

[0019] Specifically, a valve seat is provided on the inner wall of the valve cover near the hollow connector, and a spring groove is provided on the end face of the end cover near the valve cavity. One end of the spring is installed in the spring groove, and the other end pushes the valve ball against the valve seat, so that the valve ball seals the valve seat.

[0020] Furthermore, the end cap is provided with a connecting ring at one end near the valve cavity, the connecting ring is provided with an inner fixing hole, and the valve cover is provided with an outer fixing hole corresponding to the inner fixing hole. The inner fixing hole and the outer fixing hole are connected with fixing screws by threads to fix the end cap.

[0021] Furthermore, the lever protrusion is cylindrical with an axially symmetrical cross-section.

[0022] Furthermore, at least two oil outlet holes are provided.

[0023] Furthermore, the oil outlet hole forms a three-outlet oil outlet hole, which includes a first outlet oil outlet hole, a second outlet oil outlet hole, and a third outlet oil outlet hole;

[0024] Specifically, the first or third oil discharge hole is composed of at least two first oil outlet holes evenly distributed around the outer periphery of the valve cover; the second oil discharge hole is composed of at least two second oil outlet holes evenly distributed around the outer periphery of the valve cover.

[0025] Specifically, the second oil outlet is staggered from the first oil outlet, and the diameter of the second oil outlet is larger than that of the first oil outlet.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. In this utility model, the locking groove of the strong magnetic wrench is completely matched with the cross-section of the wrench protrusion of the built-in one-way valve. Under the action of strong magnet, it prevents the built-in one-way valve from falling into the oil nozzle sleeve. The cross-section design of the wrench protrusion is consistent with the cross-section of the oil nozzle wrench, which can be used interchangeably and reduces the problem of carrying multiple tools.

[0028] 2. The built-in one-way valve of this utility model effectively solves the problem of well fluid backflow when multiple wells are running concurrently and there is leakage in the tubing, pump, or valve of one well. The backflowing fluid is incompatible with the formation, which will reduce the permeability of the oil layer and affect the future development effect. The built-in one-way valve of this utility model effectively prevents well fluid backflow, avoids production loss, and effectively protects the oil layer.

[0029] 3. This utility model has a simple design and is easy to operate. It does not require any open flame and can be completed by one person. It effectively prevents well fluid backflow when there is leakage in the tubing, pump, or valve, avoids production loss, protects the oil layer, significantly reduces the material cost of installing the wellhead check valve, improves work efficiency, reduces work intensity, increases well operating rate, and increases well production. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the built-in single-flow valve in this utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the lever protrusion in this utility model.

[0032] Figure 3 This is a schematic diagram illustrating the application of the built-in single-flow valve in this utility model.

[0033] Figure 4 This is a structural schematic diagram of the special strong magnetic wrench of this utility model.

[0034] Figure 5 This is a bottom view of the high-magnetic special wrench of this utility model.

[0035] In the diagram: 1. Built-in check valve, 1-1. Threaded connector, 1-2. Valve seat, 1-3. Valve cover, 1-4. Oil outlet, 1-5. Lever lug, 1-6. Valve ball, 1-7. Spring, 1-8. Spring groove, 1-9. End cap, 1-10. Reserved hole, 1-11. Valve cavity, 1-12. Internal fixing hole, 1-13. Fixing screw.

[0036] 2. Strong magnet special wrench, 2-1. Adjustable handle, 2-2. Handle baffle, 2-3. Connecting rod, 2-4. Handle clip connector, 2-5. Permanent magnet; 2-6. Fixing screw.

[0037] 3. Oil nozzle sleeve; 4. Information equipment plug; 5. Temperature measuring blind tube for integrated temperature and pressure transmitter. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Example 1:

[0040] Please see Figures 1 to 5The present invention provides a complete set of equipment for a nozzle sleeve with a built-in one-way valve and a replacement tool, including a built-in one-way valve 1 and a strong magnetic wrench 2.

[0041] Further, the built-in single-flow valve 1 includes a valve cover 1-3, which is a cylindrical structure. The valve cover 1-3 has a valve cavity 1-11 inside. One end of the valve cover 1-3 is connected to a hollow threaded connector 1-1, and the other end is connected to an end cap 1-9. An oil outlet hole 1-4 is provided on the side wall of the valve cover 1-3. A valve ball 1-6 and a spring 1-7 are provided inside the valve cavity 1-11. A valve seat 1-2 is provided on the inner wall of the valve cover 1-3 near the threaded connector 1-1. A spring groove 1-8 is provided on the end face of the end cap 1-9 near the valve cavity 1-11. One end of the spring 1-7 is installed in the spring groove 1-8, and the other end pushes the valve ball 1-6 against the valve seat 1-2, so that the valve ball 1-6 seals the valve seat 1-2. A lever protrusion 1-5 is provided on the end of the end cap 1-9 away from the valve cover 1-3 for installing and removing the built-in single-flow valve 1. The end cap 1-9 and the lever protrusion 1-5 are made of magnetic materials, such as iron, cobalt, nickel and their alloy iron.

[0042] Specifically, the valve seat 1-2 is a conical surface.

[0043] Specifically, the lever protrusions 1-5 are cylindrical with axially symmetrical cross-sections, and this structure is easy to process.

[0044] Specifically, the end face of the lever protrusion 1-5 is provided with reserved holes 1-10 to facilitate positioning and installation.

[0045] Specifically, at least two oil outlet holes 1-4 are provided.

[0046] More specifically, the oil outlet holes 1-4 form a three-outlet oil outlet, which includes a first outlet oil outlet, a second outlet oil outlet, and a third outlet oil outlet. The first outlet oil outlet or the third outlet oil outlet is composed of at least two first outlet oil outlets evenly distributed around the outer periphery of the valve cover 1-3. The second outlet oil outlet is composed of at least two second outlet oil outlets evenly distributed around the outer periphery of the valve cover 1-3. The second outlet oil outlet is staggered from the first outlet oil outlet, and the diameter of the second outlet oil outlet is larger than that of the first outlet oil outlet, thereby increasing the oil output while ensuring the strength of the valve cover 1-3.

[0047] Furthermore, the end cap 1-9 is provided with a connecting ring at one end near the valve cavity 1-11. The connecting ring is provided with an inner fixing hole 1-12. The valve cover is provided with an outer fixing hole corresponding to the inner fixing hole 1-12. The inner fixing hole 1-12 and the outer fixing hole are connected by a screw 1-13 to fix the end cap 1-9. This detachable structure facilitates cleaning of the valve seat inside the flow valve and makes it easy to replace the spring and valve ball when they are damaged.

[0048] Furthermore, the strong magnetic wrench 2 includes a connecting rod 2-3, with a wrench latch 2-4 at the lower end of the connecting rod 2-3. The wrench latch 2-4 has a locking groove at the end furthest from the connecting rod 2-3, corresponding to the wrench protrusion 1-5. A permanent magnet 2-5 is located at the bottom of the locking groove. The connecting rod 2-3 has a radial through hole, in which a movable wrench 2-1 is installed. When the wrench protrusion 1-5 is engaged with the wrench latch 2-4, the permanent magnet 2-5 magnetically connects with the wrench protrusion 1-5. Under the magnetic attraction, the built-in single-flow valve 1 is prevented from falling into the oil nozzle sleeve, thus quickly completing the installation and removal of the built-in single-flow valve.

[0049] Specifically, the movable lever 2-1 is equipped with lever baffles 2-2 at both ends. The movable lever 2-1 can slide in the radial through hole, which is convenient to adapt to the operator's force application posture. The lever baffles 2-2 prevent the movable lever 2-1 from coming out.

[0050] Specifically, the permanent magnet 2-5 is connected to the lever connector 2-4 by a fixing screw 2-6. The fixing screw 2-6 is located in the center of the engagement groove and corresponds to the reserved hole 1-10. This can assist in positioning and also make the permanent magnet 2-5 fit against the end face of the lever protrusion.

[0051] Specifically, the lever connector 2-4 is made of magnetic material. After the lever connector 2-4 is magnetized by the permanent magnet 2-5, the connection effect between the lever connector 2-4 and the lever protrusion 1-5 is improved.

[0052] Example 2:

[0053] Based on Example 1, this example provides a method for using a complete set of equipment including a flow valve built into an oil nozzle sleeve and its replacement tool, comprising the following steps:

[0054] When using, wear insulated gloves and press the stop button to stop the machine. Turn to the side and pull the switch to disconnect the power. Stop the oil pumping equipment, close the production valve and back pressure valve, open the sampling valve to release the residual pressure until the pressure gauge pointer drops to zero, disconnect the aviation plug of the temperature and pressure integrated transmitter connected to the oil nozzle sleeve, and remove the plug 4 of the information equipment.

[0055] Fit the lug 1-5 of the built-in single-flow valve 1 with the wrench clamp 2-4 of the strong magnetic wrench 2, and use the permanent magnet 2-5 to attract them together. Use the strong magnetic wrench 2 to install the threaded connector 1-1 of the built-in single-flow valve 1 at the oil inlet of the oil nozzle sleeve, and use the movable wrench 2-1 to tighten the threaded connector 1-1 of the single-flow valve.

[0056] Install the plug 4 of the information equipment on the oil nozzle sleeve 3, connect the aviation plug of the integrated temperature and pressure transmitter, close the sampling valve, open the back pressure valve and the production valve, put on insulating gloves, turn on the power sideways, press the start button to start the machine, observe the temperature and pressure, realize the installation of the built-in single-flow valve of the oil nozzle sleeve of the integrated temperature and pressure transmitter, and restore normal production.

[0057] After installation, the well fluid in normal production will push open the valve ball 1-6, enter the valve chamber 1-11, flow into the oil nozzle sleeve 3 through the multiple oil outlet holes 1-4 on the valve body 1-3, and enter the oil well pipeline through the outlet, and the oil well will be in normal production. At the same time, the end cover 1-9 of the built-in single-flow valve 1 is 30mm away from the temperature measurement blind tube of the integrated temperature and pressure transmitter, which does not affect the accuracy of temperature recording.

[0058] If there is leakage in the tubing, pump, or valve of the well, and the well is shut down or the leakage is severe, when the well fluid backflows, the backflowing well fluid enters the nozzle sleeve, and the valve ball 1-6 of the built-in one-way valve 2 immediately sets with the valve seat 1-2 to ensure that the well fluid cannot backflow into the well.

[0059] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0060] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A complete set of equipment for a nozzle sleeve with a built-in check valve and a replacement tool thereof, comprising a built-in check valve and a strong magnetic wrench, characterized in that, One end of the built-in flow valve is provided with a lever protrusion, and the lever protrusion is made of magnetic material. The strong magnetic wrench includes a connecting rod, and a wrench locking connector is provided at the lower end of the connecting rod; a locking groove is provided at the end of the wrench locking connector away from the connecting rod, and a permanent magnet is provided at the bottom of the locking groove. The wrench protrusion can engage with the locking groove.

2. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 1, characterized in that, The connecting rod is provided with a radial through hole, and a movable handle is installed in the radial through hole; handle baffles are installed at both ends of the movable handle, and the movable handle can slide in the radial through hole.

3. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 1, characterized in that, The permanent magnet is connected to the lever connector by a fixing screw, which is located in the center of the engagement groove.

4. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 1, characterized in that, The lever connector is made of magnetic material.

5. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 1, characterized in that, The built-in single-flow valve includes a valve cover, one end of which is connected to a hollow connector and the other end is connected to an end cap. A lever protrusion is provided on the end of the end cap away from the valve cover.

6. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 5, characterized in that, The valve cover has a cylindrical structure, the inside of the valve cover is a valve cavity, the side wall of the valve cover is provided with an oil outlet hole, and a valve ball and a spring are provided in the valve cavity; A valve seat is provided on the inner wall of the valve cover near the hollow connector. A spring groove is provided on the end face of the end cover near the valve cavity. One end of the spring is installed in the spring groove, and the other end pushes the valve ball against the valve seat, so that the valve ball seals the valve seat.

7. A complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 5, characterized in that, The end cap has a connecting ring at one end near the valve cavity. The connecting ring has an inner fixing hole, and the valve cover has an outer fixing hole corresponding to the inner fixing hole. The inner fixing hole and the outer fixing hole are fixed by threaded screws to fix the end cap.

8. The complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 5, characterized in that, The lever protrusion is cylindrical with an axially symmetrical cross-section.

9. A complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 6, characterized in that, At least two oil outlet holes are provided.

10. A complete set of equipment for a nozzle sleeve with a built-in check valve and its replacement tool according to claim 9, characterized in that, The oil outlet forms a three-outlet oil outlet, which includes a first outlet oil outlet, a second outlet oil outlet, and a third outlet oil outlet. The first or third oil discharge port is composed of at least two first oil outlet ports evenly distributed around the outer periphery of the valve cover; the second oil discharge port is composed of at least two second oil outlet ports evenly distributed around the outer periphery of the valve cover. The second oil outlet is staggered from the first oil outlet, and the diameter of the second oil outlet is larger than that of the first oil outlet.

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