Coaxial reversal jet well washing device

Abstract

The utility model provides a coaxial reverse jet well washing device which comprises a well washing end, a plurality of connecting joints and a plurality of rotating components, the well washing end is connected with the connecting joints, the connecting joints and the rotating components are arranged at intervals, and one connecting joint located at the tail end is connected with a drill rod; a hollow liquid inlet cavity is formed in the well washing end and the connecting joint which are connected, a plurality of spraying holes are formed in the well washing end and the connecting joint in the circumferential direction, and the spraying holes are communicated with the liquid inlet cavity. A flexible steel wire brush is arranged in the circumferential direction of the connecting joint and used for brushing mud cakes on the well wall. According to the coaxial reverse jetting well washing device, well washing fluid can be jetted in multiple directions, well wall cleaning operation is comprehensive and free of dead corners, and the interior of a well is clean and thorough; the device has the characteristics of convenience, quickness, flexibility and variability in one-time well washing, is suitable for well washing work of hydrological wells in different occasions, and can be widely popularized.

Description

Technical Field

[0001] This application belongs to the field of geological exploration technology, and in particular relates to a coaxial reverse jet well washing device. Background Technology

[0002] In the process of conducting geological exploration or hydrological surveys in the field, it is common to drill water wells for hydrological surveys. After drilling is completed, the water wells for hydrological surveys need to undergo a well-washing process before a pumping test.

[0003] Common well-washing methods include carbon dioxide well-washing, piston well-washing, and clean water well-washing. However, carbon dioxide well-washing is relatively expensive, and piston well-washing and clean water well-washing are not thorough enough, leading to inaccurate subsequent pumping test data and seriously affecting the hydrological survey results of the exploration area. Utility Model Content

[0004] In view of this, this application aims to propose a coaxial reverse jet well washing device to solve the problem of poor well washing effect, which leads to inaccurate subsequent pumping test data and seriously affects the hydrological exploration results of the exploration area.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] This application provides a coaxial reverse jet well washing device, including a well washing end, a connecting section and a rotating component. The well washing end is connected to the connecting section. Multiple connecting sections and multiple rotating components are provided, and the connecting sections and rotating components are arranged at intervals. The connecting section located at the end is connected to the drill pipe.

[0007] The inside of the connected well-washing end and the connecting section forms a hollow liquid inlet cavity. The well-washing end and the connecting section are respectively provided with a plurality of injection holes in a circumferential manner, and the injection holes are connected to the liquid inlet cavity.

[0008] The connecting joint is circumferentially equipped with a flexible steel wire brush, which is used to scrub mud off the well wall.

[0009] Furthermore, the end of the well-washing head has a conical structure, the middle part of the well-washing head has a polygonal structure, the injection holes are correspondingly arranged on each end face of the polygonal structure, and the middle part is provided with a first connecting part with a cylindrical structure for connecting with the connecting section;

[0010] The middle part of the well-washing end and the interior of the first connecting part are provided with a first inner cavity that communicates with the injection hole.

[0011] Furthermore, the main body of the connecting section has a polygonal structure and is correspondingly arranged to the middle part of the well washing end, and the injection hole and the flexible steel wire brush are correspondingly arranged on each end face of the polygonal structure;

[0012] The connecting section body is provided with a second connecting part in the form of a cylinder, which is used to connect with the next connecting section body or drill pipe;

[0013] The connecting section body and the second connecting part have a second inner cavity that communicates with the injection hole, and the first inner cavity and the second inner cavity form the liquid inlet cavity.

[0014] Furthermore, the first connecting part is provided with an external thread, and the connecting joint body is provided with an internal thread, and the first connecting part is threadedly connected to the connecting joint;

[0015] The second connecting part is also provided with external threads and is threadedly connected to the connecting section or the drill rod.

[0016] Furthermore, the first connecting part and the second connecting part are also provided with space for mounting the rotating component;

[0017] The rotating component includes a sheath and a plurality of spiral blades disposed on the sheath, the sheath being assembled to the first connecting part and the second connecting part via bearings.

[0018] Furthermore, the directions of the propellers on two adjacent sheaths are opposite.

[0019] Furthermore, the bearing is a cylindrical roller bearing.

[0020] Compared with the prior art, the coaxial reverse jet well washing device described in this application has the following advantages:

[0021] The coaxial reverse jet well cleaning device described in this application adopts a modularly assembled well cleaning end, as well as multiple connecting sections and rotating components. Each module sprays well cleaning fluid in multiple directions, ensuring comprehensive and thorough cleaning of the well wall without any blind spots, resulting in a clean and complete well. This device features convenient, fast, and flexible one-time well cleaning, adapting to well cleaning work in different situations and can be widely promoted. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of a coaxial reverse jet well washing device according to an embodiment of this application;

[0024] Figure 2 This is an exploded view of a coaxial reverse jet well washing device according to an embodiment of this application;

[0025] Figure 3 This is a cross-sectional view of the well washing end as described in the embodiments of this application;

[0026] Figure 4 This is a cross-sectional view of the connecting section described in the embodiment of this application;

[0027] Figure 5 This is a top view of the connecting joint and flexible wire brush described in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the rotating component structure described in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Well washing end; 11-First connecting part; 12-First inner cavity; 2-Connecting section; 21-Second connecting part; 22-Second inner cavity; 3-Rotating component; 31-Sheath; 32-Propeller; 4-Flexible wire brush; 5-Cylindrical roller bearing; 6-Injection hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can refer to any connection.

[0033] This includes electrical connections, whether direct or indirect. Terms like "up," "down," "left," and "right" are used only to indicate relative positional relationships; these relative relationships may change if the absolute position of the object being described changes.

[0034] Please see Figure 1 and Figure 2As shown, this embodiment provides a coaxial reverse jet well washing device, including a well washing end 1, a connecting section 2 and a rotating component 3. The well washing end 1 is connected to the connecting section 2. Multiple connecting sections 2 and multiple rotating components 3 are provided, and the connecting sections 2 and multiple rotating components 3 are arranged at intervals. The connecting section 2 at the end is connected to the drill pipe.

[0035] The interior of the connected well washing end 1 and the connecting section 2 forms a hollow liquid inlet chamber. Several injection holes 6 are arranged circumferentially on the well washing end 1 and the connecting section 2, and the injection holes 6 are connected to the liquid inlet chamber.

[0036] The connecting section 2 is also circumferentially equipped with a flexible steel wire brush 4, which is used to scrub the mud on the well wall.

[0037] Specifically, in this embodiment, the device is a modular well-washing device assembled based on actual site conditions and according to real-world conditions such as pump head and drill pipe thickness. The device adopts a modular assembly structure casing design, and the number of connecting sections 2 and rotating components 3 can be set according to site conditions, thus making it flexible and convenient to use in various different situations, easy to assemble, and highly adaptable.

[0038] The well-washing fluid enters the inlet chamber and is sprayed out through the jet hole 6, cleaning the well wall from all angles. At the same time, the turbulence generated by the rotating component 3 makes it easier and more efficient to flush the mud and dirt off the well wall. The flexible steel wire brush 4 can brush the mud off the well wall, making it easier to peel off. The entire well-washing operation is convenient and quick, and the well-washing operation is clean and thorough. It can be adapted to the well-washing work of hydrological wells in different occasions.

[0039] In some implementations, such as Figure 3 As shown, the end of the well washing head 1 has a conical structure, the middle part of the well washing head 1 has a polygonal structure, the injection holes 6 are correspondingly arranged on each end face of the polygonal structure, and the middle part is provided with a first connecting part 11 with a cylindrical structure for connecting with the connecting section 2.

[0040] The middle part of the well washing end 1 and the interior of the first connecting part 11 are provided with a first inner cavity 12 that communicates with the injection hole 6.

[0041] Specifically, in this embodiment, the end of the well-washing end 1 is a conical structure, which allows the casing to easily move through the well without causing jamming. The middle part of the well-washing end 1 is a regular hexagonal structure, which allows the operator to tighten the structure to prevent water leakage from the casing and maintain positive pressure in the casing cavity so that the structure can continuously spray flushing fluid. Each face of the regular hexagonal structure is provided with a spray hole 6, which communicates with the first inner cavity 12. The well-washing fluid is poured into the first inner cavity 12 and sprayed out through the spray hole 6, which can achieve the purpose of flushing the well wall.

[0042] In some implementations, such as Figure 4 and Figure 5 As shown, the main body of the connecting section has a polygonal structure and is set in the middle of the well washing end 1. The injection hole 6 and the flexible steel wire brush 4 are set on each end face of the polygonal structure.

[0043] The main body of the connecting section is provided with a second connecting part 21 in the form of a cylinder, which is used to connect with the next connecting section body or drill pipe.

[0044] The main body of the connecting section and the second connecting part 21 are provided with a second inner cavity 22 that communicates with the injection hole 6. The first inner cavity 12 and the second inner cavity 22 form a liquid inlet cavity.

[0045] The first connecting part 11 is provided with an external thread, and the connecting section body is provided with an internal thread. The first connecting part 11 is threadedly connected to the connecting section 2.

[0046] The second connecting part 21 is also provided with external threads and is threadedly connected to the connecting section 2 or the drill rod.

[0047] Specifically, in this embodiment, the number of connecting sections 2 can be determined according to the actual situation. The first connecting part 11 is in rolling contact with the cylindrical roller bearing 5. The cylindrical roller bearing 5 is equipped with a rotating component 3, and the male thread of the connector on the first connecting part 11 is sequentially and repeatedly threadedly connected with the female thread of the connector in the body of the connecting section.

[0048] The second connecting part 21 also rolls in contact with the cylindrical roller bearing 5. The male thread of the connector on the second connecting part 21 is repeatedly threadedly connected to the female thread of the connector in the body of the next connecting part. The male thread of the connector on the last connecting part 21 is connected to the drill pipe. The well cleaning fluid is sent from the drill pipe to the inner cavity of the structure. The injection hole 6 is connected to the second inner cavity 22. The well cleaning fluid is poured into the second inner cavity 22 and sprayed out from the injection hole 6 to achieve the purpose of cleaning the well wall.

[0049] When the drill pipe rotates, the flexible wire brush 4 can brush the mud film on the well wall, making it easier to peel off and clean deep dirt on the well wall. The wire brush is welded to the main body of the connecting section.

[0050] In some implementations, such as Figure 3 , Figure 4 and Figure 6 As shown, the first connecting part 11 and the second connecting part 21 also have reserved space for mounting the rotating component 3;

[0051] The rotating component 3 includes a sleeve 31 and a plurality of spiral blades 32 disposed on the sleeve 31. The spiral blades 32 are evenly distributed on the sleeve 31 at 360°. The spiral blades 32 disposed on adjacent sleeves 31 are in opposite directions. The sleeve 31 is assembled to the first connecting part 11 and the second connecting part 21 by means of cylindrical roller bearings 5.

[0052] Specifically, in this embodiment, the spiral blades 32 provided on two adjacent rotating components 3 form a coaxial reversible structure. The counterclockwise spiral blade 32 and the clockwise spiral blade 32 rotate in opposite directions. Both the counterclockwise spiral blade 32 and the clockwise spiral blade 32 are in the form of circular tubes, which facilitates the generation of turbulent flow of the well washing fluid and makes the mud on the well wall cleaner and more thorough.

[0053] The cylindrical roller bearing 5 is a roller bearing structure composed of five sets of cylindrical structures. Each set of bearing housings consists of 38 cylindrical structures. The inner sides of these five sets of cylindrical roller bearings 5 ​​are respectively assembled and connected to the first connecting part 11 or the second connecting part 21, and the outer sides of the cylindrical roller bearings 5 ​​are assembled and connected to the protective sleeve 31.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

[0055] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A coaxial reverse jet well washing device, characterized in that: It includes a well-washing end, a connecting section, and a rotating component. The well-washing end is connected to the connecting section. Multiple connecting sections and multiple rotating components are provided, and the connecting sections and rotating components are arranged at intervals. The connecting section located at the end is connected to the drill pipe. The inside of the connected well-washing end and the connecting section forms a hollow liquid inlet cavity. The well-washing end and the connecting section are respectively provided with a plurality of injection holes in a circumferential manner, and the injection holes are connected to the liquid inlet cavity. The connecting joint is circumferentially equipped with a flexible steel wire brush, which is used to scrub mud off the well wall.

2. The coaxial reverse jet well washing device according to claim 1, characterized in that: The end of the well-washing head is conical, the middle part of the well-washing head is polygonal, the injection holes are correspondingly arranged on each end face of the polygonal structure, and the middle part is provided with a first connecting part in a cylindrical shape for connecting with the connecting section. The middle part of the well-washing end and the interior of the first connecting part are provided with a first inner cavity that communicates with the injection hole.

3. The coaxial reverse jet well washing device according to claim 2, characterized in that: The main body of the connecting section has a polygonal structure and is correspondingly arranged to the middle part of the well washing end. The injection hole and the flexible steel wire brush are respectively arranged on each end face of the polygonal structure. The connecting section body is provided with a second connecting part in the form of a cylinder, which is used to connect with the next connecting section body or drill pipe; The connecting section body and the second connecting part have a second inner cavity that communicates with the injection hole, and the first inner cavity and the second inner cavity form the liquid inlet cavity.

4. The coaxial reverse jet well washing device according to claim 3, characterized in that: The first connecting part is provided with an external thread, and the connecting section body is provided with an internal thread. The first connecting part is threadedly connected to the connecting section. The second connecting part is also provided with external threads and is threadedly connected to the connecting section or the drill rod.

5. A coaxial reverse jet well washing device according to claim 3, characterized in that: The first connecting part and the second connecting part are also provided with space for mounting the rotating component; The rotating component includes a sheath and a plurality of spiral blades disposed on the sheath, the sheath being assembled to the first connecting part and the second connecting part via bearings.

6. A coaxial reverse jet well washing device according to claim 5, characterized in that: The directions of the propellers on two adjacent sheaths are opposite.

7. A coaxial reverse jet well washing device according to claim 5, characterized in that: The bearing is a cylindrical roller bearing.

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