A downhole rapid water discharge device

Abstract

This invention discloses a rapid drainage device for downhole operations, relating to the technical field of downhole equipment. It includes a suction pipe assembly and a suction component. The suction pipe assembly consists of a suction pipe, a widening section, and a suction section, with the widening section fixed between the suction pipe and the suction section. The widening section contains a filter element and an elastic filter cloth. The suction section contains an elastic telescopic rod assembly, the movable end of which is connected to the center of the elastic filter cloth, allowing the elastic filter cloth to adhere to or separate from the filter element. During suction, accumulated water is filtered through the suction section and the widening section before entering the suction pipe and being discharged. When impurities accumulate, causing a decrease in suction, the elastic telescopic rod assembly contracts, deforming the elastic filter cloth and causing the impurities to fall off automatically. The device also includes multiple suction hoses with filter screens, and the suction component provides power and allows for adjustable rotation speed. This device avoids filter clogging, eliminates the need for manual cleaning, improves drainage efficiency and stability, and is suitable for complex downhole working conditions.

Description

Technical Field

[0001] This invention relates to the field of downhole operation equipment technology, specifically to a rapid downhole drainage device. Background Technology

[0002] During underground operations, water accumulation is highly likely to occur due to factors such as groundwater infiltration, changes in geological structure, and the use of water for construction. If underground water cannot be drained in time, it will flood the work surface, corrode underground equipment, and reduce the soil bearing capacity. This not only seriously affects the efficiency of underground operations but may also cause safety accidents such as collapses and electrical leaks, threatening the lives of workers. Therefore, underground drainage is a crucial link in ensuring the safe and stable conduct of underground operations.

[0003] Currently, most underground drainage equipment uses a single suction structure, directly extracting accumulated water through a suction pipe. To prevent impurities from clogging the equipment, a filter component is usually installed inside the suction pipe. However, existing filter components are mostly fixed structures and cannot achieve automatic cleaning. The accumulated water in the well contains a large number of impurities of varying sizes, such as stones and silt. During use, small impurities easily adhere to the surface of the filter component, causing blockage of the filter channel, thereby reducing the equipment's suction efficiency and even causing the equipment to shut down.

[0004] Due to the complex and confined environment of underground operations, and the corrosive nature of the accumulated water, manually disassembling and cleaning the filter components is not only labor-intensive and inconvenient, but also interrupts drainage operations, prolongs drainage cycles, and increases operating costs. Furthermore, if blockages are not cleaned promptly, they can cause the suction components to overload, shortening the equipment's lifespan and failing to meet the demand for rapid and continuous drainage of underground water. Therefore, solving the technical problems of easily clogged filter components in existing underground drainage equipment, the need for frequent manual cleaning, and the impact on drainage continuity has become a critical issue that urgently needs to be addressed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid downhole drainage device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a downhole rapid drainage device, comprising a suction pipe assembly and a suction component, wherein the suction pipe assembly comprises a suction pipe, a widening portion and a suction portion, and the widening portion is fixedly installed between the suction pipe and the suction portion;

[0007] The widened section has a filter element and an elastic filter cloth fixedly installed inside. The elastic filter cloth is located on the side near the suction section. The suction section has an elastic telescopic rod assembly fixedly installed inside. The movable end of the elastic telescopic rod assembly is fixedly connected to the elastic filter cloth, and the movable end of the elastic telescopic rod assembly is connected to the center of the elastic filter cloth. When the elastic telescopic rod assembly is not under force, the movable end of the elastic telescopic rod assembly is in a contracted state. At this time, the elastic filter cloth and the filter element are separated. When the movable end of the elastic telescopic rod assembly is in a fully extended state, the elastic filter cloth and the filter element are in contact.

[0008] Preferably, the elastic telescopic rod assembly includes a fixed sleeve, a movable rod, and a tension spring; the fixed sleeve is fixedly installed inside the suction section, one end of the movable rod is fixedly connected to the elastic filter cloth, the other end of the movable rod extends into the interior of the fixed sleeve, and the tension spring is fixedly installed between the fixed sleeve and the other end of the movable rod.

[0009] Preferably, a fixing ring is fixedly installed on one end of the movable rod, and a limiting ring is fixedly installed inside the widened portion, which is sleeved on the outside of the movable rod.

[0010] Preferably, a support base is provided at the opening end of the suction part, and a gap is provided between the support base and the opening end of the suction part. A fixing rod is fixedly installed on the support base, and the fixing rod is fixedly connected to the inner surface of the suction part through a second fixing bracket.

[0011] Preferably, a plurality of suction hoses are fixedly installed on the widened portion, and a suction head is fixedly installed on one end of each suction hose, with a filter screen fixedly installed on the outside of the suction head.

[0012] Preferably, the elastic filter cloth is made of a wear-resistant and corrosion-resistant polymer material.

[0013] Preferably, the filter element is configured as a hemispherical shape.

[0014] Compared with the prior art, the present invention provides a rapid drainage device for downhole wells, which has the following beneficial effects:

[0015] 1. The elastic filter cloth in the widened section of the equipment works in conjunction with the elastic telescopic rod assembly. During suction, the elastic filter cloth adheres to the filter element to achieve double filtration and block fine impurities. When impurities accumulate and the suction decreases, the elastic telescopic rod assembly contracts, causing the elastic filter cloth to separate from the filter element. The impurities are detached by elastic deformation, eliminating the need for manual disassembly and cleaning, reducing maintenance workload, and avoiding downtime due to blockage that affects the drainage progress. It is suitable for long-term stable operation in complex underground water environments.

[0016] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure in this invention;

[0020] Figure 3 This is a schematic diagram of the structure of the filter element, elastic filter cloth, elastic telescopic rod assembly, fixing ring, and limiting ring in this invention.

[0021] In the diagram: 1. Suction pipe; 2. Widening section; 3. Suction section; 4. Filter element; 5. Elastic filter cloth; 6. Fixing sleeve; 7. Movable rod; 8. Tension spring; 9. Fixing ring; 10. Limiting ring; 11. Connecting rod; 12. Mounting ring; 13. First fixing frame; 14. Support base; 15. Fixing rod; 16. Second fixing frame; 17. Suction hose; 18. Filter screen sleeve. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-3 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0023] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] This embodiment discloses a rapid drainage device for downholes. The device includes a suction pipe assembly and a suction component. The suction pipe assembly, serving as a flow channel for accumulated water, mainly consists of a suction pipe 1, a widening section 2, and a suction section 3. These three components are connected using an integral molding structure or welding to ensure a tight seal at the connection points, preventing water and air leakage during suction and thus improving drainage efficiency. Specifically, the widening section 2 is fixedly installed between the suction pipe 1 and the suction section 3. The inner diameter of the widening section 2 is larger than the inner diameters of both the suction pipe 1 and the suction section 3. Its purpose is to accommodate a filter component and provide a buffer space for the accumulated water, reducing the impact of impurities on the suction component.

[0026] The suction assembly, as the power core of the entire drainage equipment, is used to provide the negative pressure required for pumping out accumulated water. It is fixedly installed at the end of the suction pipe 1 away from the widened part 2 and is sealed to the suction pipe 1 to ensure that there is no negative pressure leakage during the pumping process. Specifically, the suction assembly includes a drive motor, an impeller pump body, a sealing seat, and a control module. The drive motor is an explosion-proof asynchronous motor, suitable for flammable and explosive working environments underground. Its output shaft is fixedly connected to the input shaft of the impeller pump body via a coupling, providing power for the operation of the impeller pump body. The inlet of the impeller pump body is sealed to the end of the suction pipe 1 away from the widened section 2, and the outlet is connected to a drainage pipe to discharge the pumped water to a designated water collection area underground or to the ground. The sealing seat is located at the joint between the impeller pump body and the suction pipe 1, and adopts a combination structure of rubber sealing gasket and metal pressure ring to further enhance the sealing of the connection and prevent negative pressure leakage and water seepage. The control module is electrically connected to the drive motor, which can realize the start and stop control and speed adjustment of the drive motor, thereby adjusting the suction force and drainage flow. At the same time, the control module integrates a pressure sensor, which can detect the negative pressure value of the impeller pump body inlet in real time. When the negative pressure value is too low (i.e. the filter component is severely clogged), it can automatically control the drive motor to stop to avoid motor overload damage.

[0027] A filter element 4 and an elastic filter cloth 5 are fixedly installed inside the widened section 2. Both are tightly fitted to the inner surface of the widened section 2, ensuring that the accumulated water must be filtered by both before entering the suction pipe 1. The elastic filter cloth 5 is located on the side closer to the suction section 3, and the filter element 4 is located on the side closer to the suction pipe 1. The filter element 4 is hemispherical, which increases the contact area between the filter element 4 and the accumulated water, improving the filtration effect and facilitating the temporary storage and removal of impurities. The elastic filter cloth 5 is made of a wear-resistant and corrosion-resistant polymer material. This material has good elasticity and toughness, can adapt to repeated deformation, and can resist the corrosiveness of underground water, extending the service life of the equipment.

[0028] To achieve automatic cleaning of the elastic filter cloth 5 and prevent clogging by impurities, an elastic telescopic rod assembly is fixedly installed inside the suction unit 3. The movable end of the elastic telescopic rod assembly is fixedly connected to the elastic filter cloth 5, specifically at the center of the elastic filter cloth 5, ensuring that the extension and retraction of the elastic telescopic rod assembly can cause the overall deformation of the elastic filter cloth 5. When the elastic telescopic rod assembly is not under force, its movable end is in a contracted state. At this time, the elastic filter cloth 5 is in a naturally extended state under its own elasticity, separated from the filter element 4, forming a certain gap between the two. When the movable end of the elastic telescopic rod assembly is fully extended, the elastic filter cloth 5 is stretched and fits against the filter element 4. At this time, the accumulated water needs to pass through the double filtration of the elastic filter cloth 5 and the filter element 4 simultaneously.

[0029] The suction filtration and automatic cleaning process of this equipment is as follows: After the suction assembly is started, a negative pressure is generated at the bottom of the suction section 3, which draws in the water from the well. The water first enters the interior of the suction section 3, then flows into the widening section 2, and finally is discharged through the suction pipe 1. Since the water is drawn upwards, the water entering the widening section 2 needs to pass over the elastic filter cloth 5 and the filter element 4. During this process, some larger impurities (such as stones) cannot flow upwards with the water due to gravity and will not enter the interior of the suction section 3, thus achieving preliminary filtration. At the same time, the flow of water will exert a downward thrust on the elastic filter cloth 5. This thrust overcomes the elasticity of the elastic telescopic rod assembly, causing the movable end of the elastic telescopic rod assembly to extend, thereby causing the elastic filter cloth 5 to adhere to one side of the filter element 4. Some smaller particulate impurities (such as mud, sand, dust, etc.) in the water will be blocked on the surface of the elastic filter cloth 5.

[0030] As impurities accumulate on the surface of the elastic filter cloth 5, its permeability gradually decreases, and the suction force at the suction section 3 decreases accordingly. At this point, the elastic force of the elastic telescopic rod assembly is greater than the pushing force of the accumulated water on the elastic filter cloth 5, and its movable end begins to contract, thereby causing the elastic filter cloth 5 to separate from the filter element 4. Under the action of its own elasticity and the contraction of the elastic telescopic rod assembly, the elastic filter cloth 5 deforms, returning from a fitted state to a naturally stretched state. During this process, the impurities attached to one side of the elastic filter cloth 5 lose their support and separate from the elastic filter cloth 5 under the action of gravity and the flow of accumulated water, falling into the bottom of the widening section 2 or being discharged with some of the accumulated water, thus restoring the elastic filter cloth 5 to unobstructed flow and achieving automatic cleaning without the need for manual disassembly and cleaning, improving the continuity and efficiency of drainage.

[0031] Furthermore, the elastic telescopic rod assembly specifically includes a fixed sleeve 6, a movable rod 7, and a tension spring 8, which work together to achieve the telescopic function. The fixed sleeve 6 is fixedly installed inside the suction section 3 via a first fixing bracket 13. The first fixing bracket 13 is made of stainless steel, with one end welded to the fixed sleeve 6 and the other end welded to the inner surface of the suction section 3, ensuring a secure installation of the fixed sleeve 6 and preventing shaking during suction. One end of the movable rod 7 is fixedly connected to the elastic filter cloth 5, specifically by bolting or adhesive, ensuring the stability of the connection. The other end of the movable rod 7 extends into the interior of the fixed sleeve 6 and slides within it, allowing free extension and retraction along the axis of the fixed sleeve 6. The tension spring 8 is fixedly installed between the fixed sleeve 6 and the other end of the movable rod 7. One end of the tension spring 8 is welded to the bottom of the fixed sleeve 6, and the other end is welded to the end of the movable rod 7 that extends into the fixed sleeve 6. In its natural state, the tension spring 8 is in a contracted state, providing elastic force for the contraction of the elastic telescopic rod assembly.

[0032] To control the degree of contraction of the elastic telescopic rod assembly and prevent excessive contraction that could damage the elastic filter cloth 5, a fixing ring 9 is fixedly installed on one end of the movable rod 7. The fixing ring 9 and the movable rod 7 are integrally molded and are fitted onto the end of the movable rod 7 closest to the elastic filter cloth 5. Simultaneously, a limiting ring 10 is installed inside the widening section 2. This limiting ring 10 is fitted onto the outside of the movable rod 7 and slides with it, without affecting the extension and retraction of the movable rod 7. An installation ring 12 is fixedly installed on the inner surface of the widening section 2. The installation ring 12 is welded to the inner surface of the widening section 2. The limiting ring 10 is fixedly connected to the installation ring 12 via multiple connecting rods 11. The connecting rods 11 are evenly distributed between the limiting ring 10 and the installation ring 12 to ensure that the limiting ring 10 is securely installed and subjected to uniform force. When the elastic telescopic rod assembly retracts, the movable rod 7 drives the fixed ring 9 to move towards the limiting ring 10. When the fixed ring 9 and the limiting ring 10 are in contact, the elastic telescopic rod assembly stops retracting. Through the cooperation of the fixed ring 9 and the limiting ring 10, the retraction stroke of the elastic telescopic rod assembly is effectively limited, protecting the elastic filter cloth 5 and the elastic telescopic rod assembly from damage.

[0033] To prevent the opening of the suction unit 3 from being blocked by debris from the well and to ensure the stability of the suction, a support base 14 is installed at the opening of the suction unit 3. A gap of 5-10 cm is provided between the support base 14 and the opening of the suction unit 3, which neither hinders the entry of water nor prevents larger debris from directly blocking the opening of the suction unit 3. A fixing rod 15 is fixedly installed on the support base 14. One end of the fixing rod 15 is welded to the support base 14, and the other end is fixedly connected to the inner surface of the suction unit 3 through a second fixing bracket 16. The second fixing bracket 16 is welded to the inner surface of the suction unit 3 and the fixing rod 15, ensuring that the support base 14 is firmly installed and can provide a certain degree of support for the suction unit 3 while preventing larger debris from approaching the opening of the suction unit 3.

[0034] To further improve drainage efficiency and meet the need for simultaneous drainage of water from multiple locations underground, multiple suction hoses 17 are fixedly installed on the widening section 2. The suction hoses 17 are made of corrosion-resistant and high-pressure-resistant rubber, with one end sealed to the side wall of the widening section 2 to ensure no water or air leakage at the connection. A suction head is fixedly installed on the other end of each suction hose 17. A filter screen 18, made of fine stainless steel mesh, is fixedly installed on the outside of the suction head. This filter screen 18 provides preliminary filtration of the water entering the suction hoses 17, preventing larger impurities from entering and avoiding blockage of the suction hoses 17 and the widening section 2. In use, the suction heads of the multiple suction hoses 17 can be placed at different water locations underground, allowing multiple hoses 17 to simultaneously draw water from multiple locations, significantly accelerating the water extraction speed and shortening drainage time.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A downhole rapid drainage apparatus comprising a suction tube set and a suction assembly, characterized in that: The suction tube assembly includes a suction tube (1), a widening part (2), and a suction part (3), wherein the widening part (2) is fixedly installed between the suction tube (1) and the suction part (3); The widening part (2) is fixedly installed with a filter element (4) and an elastic filter cloth (5). The elastic filter cloth (5) is located on the side near the suction part (3). The suction part (3) is fixedly installed with an elastic telescopic rod assembly. The movable end of the elastic telescopic rod assembly is fixedly connected to the elastic filter cloth (5), and the movable end of the elastic telescopic rod assembly is connected to the center of the elastic filter cloth (5). When the elastic telescopic rod assembly is not under force, the movable end of the elastic telescopic rod assembly is in a contracted state. At this time, the elastic filter cloth (5) and the filter element (4) are separated. When the movable end of the elastic telescopic rod assembly is fully extended, the elastic filter cloth (5) and the filter element (4) are in contact.

2. A downhole rapid fluid displacement apparatus according to claim 1, wherein: The elastic telescopic rod assembly includes a fixed sleeve (6), a movable rod (7), and a tension spring (8); The fixed sleeve (6) is fixedly installed inside the suction part (3). One end of the movable rod (7) is fixedly connected to the elastic filter cloth (5), and the other end of the movable rod (7) extends into the fixed sleeve (6). The tension spring (8) is fixedly installed between the fixed sleeve (6) and the other end of the movable rod (7).

3. A downhole rapid fluid displacement apparatus according to claim 2, wherein: A fixing ring (9) is fixedly installed on one end of the movable rod (7), and a limiting ring (10) is fixedly installed inside the widened part (2), which is sleeved on the outside of the movable rod (7).

4. A downhole rapid fluid displacement apparatus according to claim 1, wherein: A support base (14) is provided at the opening end of the suction part (3). There is a gap between the support base (14) and the opening end of the suction part (3). A fixing rod (15) is fixedly installed on the support base (14). The fixing rod (15) is fixedly connected to the inner surface of the suction part (3) through a second fixing frame (16).

5. A downhole rapid fluid displacement apparatus as defined in claim 1, wherein: Multiple suction hoses (17) are fixedly installed on the widened part (2). A suction head is fixedly installed on one end of each suction hose (17), and a filter screen (18) is fixedly installed on the outside of the suction head.

6. The downhole rapid drainage device according to claim 1, characterized in that: The elastic filter cloth (5) is made of wear-resistant and corrosion-resistant polymer material.

7. The downhole rapid drainage device according to claim 1, characterized in that: The filter element (4) is configured as a hemispherical shape.

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