A water injection well flow meter impeller assembly retrieval tool

Abstract

The utility model belongs to oil field exploitation field discloses a kind of water injection well flowmeter impeller assembly extraction tool, including lifting assembly, lifting assembly includes pull rod, the diameter of pull rod working end is compatible with the inner thread hole size of impeller assembly, and pull rod working end is provided with the first outer thread section that is screwed with the inner thread hole of impeller assembly connection.The utility model can be compatible with all the impeller assembly with inner thread hole, and the universality is wide, meets the flowmeter extraction demand of oil field field diversification;The utility model is applicable to oil field exploitation or civil construction industry, and is used to extract impeller assembly.

Description

Technical Field

[0001] This utility model belongs to the field of oilfield development, specifically a tool for removing the impeller assembly of a water injection well flow meter. Background Technology

[0002] Water injection wells are key equipment for maintaining formation pressure and improving crude oil recovery in oilfield development. As the core monitoring device of water injection wells, flow meters are often jammed due to foreign objects such as mud, corrosion products, and residual polymers contained in the water injection medium getting embedded in the turbine gap, which seriously affects the metering accuracy and water injection control effect. In this case, the jammed impeller needs to be removed immediately for repair or replacement.

[0003] Patent CN205209606U discloses a flow meter impeller assembly remover, including a lifting device and a locking device. The locking device engages with a second annular groove on the upper part of the impeller assembly via a protrusion thereon, while the other end of the locking device engages with a first annular groove on the lifting device's pull rod. The power provided by the lifting device is transmitted to the impeller assembly through the locking device to remove it.

[0004] However, in actual oilfield applications, the structure of the flow meter impeller assembly is not singular. For impeller assemblies that do not have a second annular groove, or impeller assemblies whose size, position, and shape of the second annular groove do not match the protrusion of the aforementioned locking device, the extractor in the aforementioned patent will not be able to effectively connect with the impeller assembly, resulting in the impeller assembly being unable to be removed. Utility Model Content

[0005] The present invention aims to provide a tool for removing the impeller assembly of a water injection well flow meter, in order to solve the problem that existing flow meter impeller assembly removers have poor versatility and cannot meet the diverse flow meter removal needs in oilfields.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tool for removing an impeller assembly from a water injection well flow meter includes a lifting assembly. The lifting assembly includes a pull rod. The diameter of the working end of the pull rod is adapted to the size of the internal threaded hole of the impeller assembly. The working end of the pull rod is provided with a first external thread section that engages with the internal threaded hole of the impeller assembly.

[0007] As a limitation of this utility model: the first external thread section is a tapered thread, and its major diameter gradually increases from the end near the impeller assembly toward the body of the tie rod.

[0008] As another limitation of this utility model: the lifting assembly also includes a support cylinder, the bottom of which is an open structure, and the top of which is provided with a through hole that matches the diameter of the pull rod.

[0009] As a further limitation of this utility model: the lifting assembly also includes a force-applying nut, and the end of the pull rod away from the impeller assembly is provided with a second external thread section. The force-applying nut is threaded onto the second external thread section, and the force-applying nut abuts against the top of the support cylinder. The force-applying nut drives the pull rod to move upward relative to the support cylinder.

[0010] As a further limitation of this utility model: a lever is fixed on the force-applying nut, and the axial direction of the lever extends radially along the pull rod.

[0011] As a further limitation of this utility model: a washer is provided between the force-applying nut and the top of the support cylinder, and the washer is movably sleeved on the outer diameter of the pull rod.

[0012] By adopting the above technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows: (1) This utility model includes a lifting assembly. The working end of the pull rod in the lifting assembly is provided with a first external thread section that is screwed into the internal thread hole of the impeller assembly. In practice, the working end of the pull rod is screwed into the internal thread hole of the impeller assembly to connect the two, and the impeller assembly is taken out through the pull rod. Since the impeller assembly has its own internal thread hole, but not every impeller assembly is provided with a second annular groove, this utility model has a wider applicability by fixing the working end of the pull rod to the impeller assembly through a threaded connection, which meets the diverse flow meter removal needs in oilfields. (2) In this utility model, the first external thread section is a tapered thread, and its thread major diameter gradually increases from the end near the impeller assembly towards the body of the tie rod. Since the internal thread hole of the impeller assembly inevitably has size error in actual production, the tapered thread has a certain degree of size adaptability and can be applied to a series of impeller assemblies with similar size. (3) Due to the long-term influence of water quality and corrosive media, the impeller assembly is usually stuck to the valve body due to corrosion, and the pull rod is difficult to withstand the pulling force required to remove the impeller assembly. Therefore, this utility model is also equipped with a force-applying nut and a wrench. First, the force-applying nut is applied with the help of the wrench. After the impeller assembly is loosened, the pull rod is rotated to remove the impeller assembly, which improves the success rate of the operation and is also safer and less labor-intensive.

[0013] In summary, this utility model is compatible with all impeller assemblies with internal threaded holes, has wide applicability, and meets the diverse flow meter removal needs in oilfields; this utility model is applicable to oilfield extraction or civil construction industries for removing impeller assemblies. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the first three-dimensional structure of this utility model embodiment; Figure 2 This is a three-dimensional structural diagram of the pull rod, support cylinder, and gasket in an embodiment of this utility model; Figure 3 This is a schematic diagram of the second three-dimensional structure of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the longitudinal section structure of the tie rod, support cylinder, and gasket in an embodiment of this utility model; Figure 5 This is a schematic diagram of the longitudinal section structure of the pull rod and the first external thread section in an embodiment of this utility model.

[0016] In the diagram: 1-Pull rod, 2-First external thread section, 3-Support cylinder, 4-Force nut, 5-Through hole, 6-Second external thread section, 7-Washer, 8-Wrench. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and do not constitute a limitation thereof.

[0018] The directional terms or positional relationships such as "upper" and "lower" used in the embodiments are based on the drawings in this utility model specification. Figure 1 The orientation relationships are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model.

[0019] like Figures 1-5 As shown, this embodiment includes a lifting assembly, which includes a pull rod 1. The diameter of the working end of the pull rod 1 is adapted to the size of the internal threaded hole of the impeller assembly. The working end of the pull rod 1 is provided with a first external thread section 2 that screws into the internal threaded hole of the impeller assembly. Here, the working end of the pull rod 1 refers to the lower end of the pull rod 1, and "adapted" means that the diameter of the lower end of the pull rod 1 is close to the size of the internal threaded hole of the impeller assembly, ensuring that the first external thread section 2 can be screwed and fixed into the internal threaded hole of the impeller assembly. Since the impeller assembly has its own internal threaded hole, this embodiment, by threading the working end of the pull rod 1 to the impeller assembly, has wider applicability and meets the diverse flow meter removal needs in oilfields.

[0020] Furthermore, such as Figure 3-5 As shown, the first external thread section 2 is a tapered thread, and its major diameter gradually increases from the end near the impeller assembly towards the body of the tie rod 1. In other words, its major diameter gradually increases from bottom to top. Because the internal threaded hole of the impeller assembly inevitably has dimensional errors in actual production, the tapered thread has a certain degree of dimensional adaptability and can be applied to a series of impeller assemblies with similar dimensions.

[0021] like Figure 1 , 3 As shown in Figure 4, the lifting assembly also includes a support cylinder 3 and a force-applying nut 4. The bottom of the support cylinder 3 is open, and the top of the support cylinder 3 has a through hole 5 that matches the diameter of the pull rod 1. Here, "matching" means that the inner diameter of the through hole 5 is slightly larger than the diameter of the pull rod 1, allowing the pull rod 1 to pass through the through hole 5. The overall height of the pull rod 1 is greater than the height of the support cylinder 3, where "height" refers to the distance in the vertical direction. A second external thread section 6 is provided at the end of the pull rod 1 furthest from the impeller assembly (i.e., the upper end of the pull rod 1). The force-applying nut 4 is threaded onto the second external thread section 6, and it abuts against the top of the support cylinder 3, driving the pull rod 1 to move upward relative to the support cylinder 3. The support cylinder 3 provides support for the pull rod 1 and the force-applying nut 4.

[0022] A washer 7 is provided between the force-applying nut 4 and the top end of the support cylinder 3 to protect the top surface of the support cylinder 3. Figure 2 , 4 As shown, the gasket 7 has a ring structure and is movably sleeved on the outer diameter of the pull rod 1. Here, "movably sleeved" means that the inner diameter of the gasket 7 is slightly larger than the outer diameter of the pull rod 1, and the pull rod 1 can move up and down relative to the gasket 7.

[0023] like Figure 1 , 3 As shown, a lever 8 is fixed to the force-applying nut 4, and the axial direction of the lever 8 extends radially along the pull rod 1. Due to the long-term influence of water quality and corrosive media, the impeller assembly is usually stuck to the valve body due to corrosion, and the pull rod 1 cannot withstand the pulling force required to remove the impeller assembly. In this case, the lever 8 is used to apply force to the force-applying nut 4 first. After the impeller assembly is loosened, the pull rod 1 is rotated to remove the impeller assembly, which improves the success rate of the operation and is also safer and less strenuous.

[0024] In this embodiment, the support cylinder 3 is placed on the upper surface of the valve body, and the pull rod 1 is inserted into the support cylinder 3. The bottom end of the pull rod 1 is connected to the impeller assembly, and the top end is connected to the force-applying nut 4. The force-applying nut 4 is rotated by turning the lever 8. Because the force-applying nut 4 is threadedly connected to the pull rod 1 and abuts against the top end of the support cylinder 3, the force-applying nut 4 will not move downwards, and the corresponding pull rod 1 will move upwards, thereby removing the impeller assembly from the flow meter. This embodiment has a simple structure, is easy to assemble and disassemble, and is convenient to carry and transport. It also allows for the rapid removal of the impeller assembly, significantly reducing the labor intensity of workers. Furthermore, it can greatly shorten maintenance time, effectively improve oil well production efficiency, help oil wells achieve increased production targets, and achieve significant cost reduction and efficiency improvement results.

[0025] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tool for removing an impeller assembly from a water injection well flow meter, comprising a lifting assembly, the lifting assembly including a pull rod, characterized in that, The diameter of the working end of the tie rod is adapted to the size of the internal threaded hole of the impeller assembly, and the working end of the tie rod is provided with a first external threaded section that engages with the internal threaded hole of the impeller assembly.

2. The tool for removing the impeller assembly of a water injection well flow meter according to claim 1, characterized in that, The first external thread section is a tapered thread, and its major diameter gradually increases from the end near the impeller assembly toward the body of the tie rod.

3. A tool for removing the impeller assembly of a water injection well flow meter according to claim 1 or 2, characterized in that, The lifting assembly also includes a support cylinder with an open bottom and a through hole at the top that matches the diameter of the tie rod.

4. The tool for removing the impeller assembly of a water injection well flow meter according to claim 3, characterized in that, The lifting assembly also includes a force-applying nut. The end of the tie rod away from the impeller assembly is provided with a second external thread section. The force-applying nut is threaded onto the second external thread section. The force-applying nut abuts against the top of the support cylinder. The force-applying nut drives the tie rod to move upward relative to the support cylinder.

5. A tool for removing the impeller assembly of a water injection well flow meter according to claim 4, characterized in that, A lever is fixed to the force-applying nut, and the axial direction of the lever extends radially along the pull rod.

6. A tool for removing the impeller assembly of a water injection well flow meter according to claim 4 or 5, characterized in that, A washer is provided between the force-applying nut and the top of the support cylinder, and the washer is movably sleeved on the outer diameter of the tie rod.

Images