A drilling mud valve

Abstract

The utility model provides a kind of drilling mud valve, including valve body, the valve body is used to install on drill string, flow passage is provided in the drill string, it further includes plugging mechanism and sleeve assembly, first ladder stage is provided in the valve body, the plugging mechanism is rotatably connected with the first ladder stage;Liquid inlet channel is provided in the valve body, the sleeve assembly is slidably installed in the liquid inlet channel, drive device for driving the sleeve assembly moves up and down is installed on the drill string, second ladder stage for cooperating with the sleeve assembly is provided in the flow passage;Form the space area between the first ladder stage and the second ladder stage;The utility model can solve the valve core sealing surface of existing technology in check valve or gate valve is exposed in drilling fluid for a long time, it is easy to cause valve clack to produce abrasion, to lose sealing ability completely.

Description

Technical Field

[0001] This utility model relates to the field of oil drilling equipment, specifically a drilling mud valve. Background Technology

[0002] Oil drilling is a process within the overall oil and gas field exploration and development system engineering. It involves drilling into the ground until it connects to the target reservoir. Drill pipe is a crucial drilling tool; the drill bit, which penetrates from the surface to the target reservoir, is powered by the casing, which circulates drilling fluid during the drilling process. Currently, commonly used drill pipes are approximately 10 meters long and connected at both ends by male and female threads. As drilling depth increases, the number of drill pipes needs to be continuously increased to achieve the desired depth. Each time a drill pipe is added, it is uncoupled on the surface to separate it from the power-providing angular block drill pipe, then the new drill pipe is installed and reconnected to the angular block drill pipe.

[0003] The drill pipe contains channels for circulating drilling fluid. When the drill pipe is uncoupled on the surface or when the formation pressure changes, the drilling fluid inside the drill pipe will overflow. Utility model patent CN207453908U discloses a magnetic mud valve for drilling (hereinafter referred to as Prior Art 1). The fixed valve has four drilling fluid channels as described above. The center of the fixed valve is a cylindrical boss, with the diameter of the lower cylinder of the boss being smaller than the diameter of the upper cylinder. The center of the floating valve is the drilling fluid channel of the floating valve, which is cylindrical with a larger diameter at the upper end than at the lower end. The floating valve is connected to the inner wall of the mud valve via a sliding track.

[0004] Existing technology 1 eliminates drilling fluid loss during the connection of new drill strings by installing a magnetic mud valve for drilling; however, in drilling operations, drilling fluid is a potentially corrosive mixture containing barite, rock cuttings, chemical additives, and other components. In existing technology 1, the valve core sealing surface of a traditional check valve or gate valve is exposed to drilling fluid for extended periods, which can easily lead to wear on the valve disc (sealing part), resulting in a complete loss of sealing capability. Utility Model Content

[0005] The purpose of this utility model is to provide a drilling mud valve that, in actual use, can solve the problem that the valve core sealing surface of the existing check valve or gate valve is exposed to drilling fluid for a long time, which easily leads to wear of the valve disc and thus complete loss of sealing ability.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A drilling mud valve includes a valve body for mounting on a drill string, the drill string having a flow channel, a plugging mechanism, and a sleeve assembly. A first stepped platform is provided inside the valve body, and the plugging mechanism is rotatably connected to the first stepped platform.

[0008] The valve body is provided with a liquid inlet channel, the sleeve assembly is slidably installed in the liquid inlet channel, the drill string is equipped with a drive device for driving the sleeve assembly to move up and down, and the flow channel is provided with a second step platform for cooperating with the sleeve assembly.

[0009] A clearance area is formed between the first step platform and the second step platform.

[0010] Preferably, the sealing mechanism includes a check valve and a torsion spring. A rotating shaft is fixedly connected to the check valve, and the check valve is rotatably connected to the first stepped platform through the rotating shaft. The torsion spring is fitted on the rotating shaft, and the check valve is connected to the first stepped platform through the torsion spring.

[0011] Preferably, the sleeve assembly includes a sleeve body and an elastic element, the sleeve body is slidably installed in the liquid inlet channel, and the sleeve body is connected to the first stepped platform through the elastic element.

[0012] Preferably, the check valve disc is provided with a protrusion.

[0013] Preferably, a first sealing ring is installed on the first stepped platform, and a first groove that mates with the first sealing ring is provided on the sleeve.

[0014] Preferably, a second sealing ring for engaging with the first slot is provided on the second stepped platform.

[0015] Preferably, a buffer pad is installed at the bottom end of the check valve disc.

[0016] Preferably, a pad is connected to the sleeve body.

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

[0018] In this invention, after the sleeve assembly is tightly seated with the second stepped platform, the flow channel is connected to the sleeve assembly to provide a smooth and continuous flow path for the drilling fluid, thereby minimizing flow resistance and eddies.

[0019] The plugging mechanism moves to the clearance area formed between the valve body and the sleeve assembly, and the sleeve assembly completely physically isolates the plugging mechanism from the drilling fluid, thus protecting the plugging mechanism. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of this utility model.

[0023] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 101-Valve body, 102-Drill string, 103-Flow channel, 104-Inlet flow channel, 105-Blocking mechanism, 106-Sleeve assembly, 107-First step platform, 108-Drive device, 109-Second step platform, 110-Check valve disc, 111-Sleeve body, 112-Elastic element, 113-Protrusion, 114-First sealing ring, 115-First slot, 116-Second sealing ring, 117-Buffer pad, 118-Pad block. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0027] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0032] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] See Figures 1-3This embodiment discloses a valve body 101 for preventing drilling fluid from overflowing or gushing out of the drill pipe. Specifically, it is a drilling mud valve, including a valve body 101, which is used to install on a drill string 102. The drill string 102 is provided with a flow channel 103, and also includes a plugging mechanism 105 and a sleeve assembly 106. A first stepped platform 107 is provided inside the valve body 101, and the plugging mechanism 105 is rotatably connected to the first stepped platform 107.

[0034] The sleeve assembly 106 is slidably installed in the fluid inlet channel 104. A drive device 108 for driving the sleeve assembly 106 to move up and down is installed on the drill string 102. A second stepped platform 109 for cooperating with the sleeve assembly 106 is provided in the flow channel 103.

[0035] A clearance area is formed between the first step platform 107 and the second step platform 109.

[0036] In this embodiment, when the drilling fluid circulates normally, the drive device 108 pushes the sleeve assembly 106 downward until its bottom is tightly seated with the second step platform 109. During this process, after the sealing mechanism 105 contacts the downwardly moving sleeve assembly 106, it can rotate downward under the drive of the sleeve assembly 106 and no longer seals the fluid inlet channel 104. After the sleeve assembly 106 is tightly seated with the second step platform 109, the flow channel 103 is connected to the sleeve assembly 106, providing a smooth and continuous flow channel for the drilling fluid, minimizing flow resistance and eddies. The sealing mechanism 105 moves to the clearance area formed between the valve body 101 and the sleeve assembly 106, and the sleeve assembly 106 connects the sealing mechanism 105 with the... The drilling fluid is completely physically isolated, protecting the plugging mechanism 105. When the valve needs to be closed, the driving force of the drive device 108 decreases or disappears, and the sleeve assembly 106 moves upward, disengaging it from the second step. At this time, the plugging assembly rotates upward to block the fluid inlet channel 104 inside the valve body 101. A stepped surface is formed between the sleeve assembly 106 and the first step platform 107 to cooperate with the plugging mechanism 105, thereby further improving the plugging effect of the plugging mechanism 105 on the fluid inlet channel 104. Through the protection of the plugging mechanism 105 by the sleeve assembly 106 during the communication with the flow channel 103, the plugging mechanism 105 is not in contact with abrasive drilling fluid for most of the working time, further improving the service life of the plugging mechanism 105.

[0037] In this embodiment, the sealing mechanism 105 includes a check valve 110 and a torsion spring. A rotating shaft is fixedly connected to the check valve 110, and the check valve 110 is rotatably connected to the first stepped platform 107 via the rotating shaft. The torsion spring is fitted onto the rotating shaft, and the check valve 110 is connected to the first stepped platform 107 via the torsion spring. In this embodiment, when the drilling fluid circulates normally, the drive device 108 pushes the sleeve assembly 106 downward. During the downward movement, the sleeve assembly 106 contacts the check valve 110, pushing the check valve 110 to rotate downward, so that it no longer blocks the fluid inlet channel 104. When the bottom of the sleeve assembly 106 is tightly seated with the second stepped platform 109, the flow channel 103 communicates with the sleeve assembly 106, providing a smooth and continuous flow channel for the drilling fluid. At this time, the check valve disc 110 moves into the clearance area between the valve body 101 and the sleeve assembly 106, and is completely physically isolated from the drilling fluid by the sleeve assembly 106. When it is necessary to close the valve, the driving force of the drive device 108 decreases or disappears, and the sleeve assembly 106 moves upward, disengaging it from the second stepped platform 109. At this time, the check valve disc 110 rotates upward under the action of the torsion spring, blocking the fluid inlet channel 104 in the valve body 101. Simultaneously, a stepped surface is formed between the sleeve assembly 106 and the first stepped platform 107 for cooperation with the check valve disc 110, enhancing the sealing effect. The torsion spring is fitted on the rotating shaft, realizing the connection between the check valve disc 110 and the first stepped platform 107, providing elastic force for the rotation of the check valve disc 110.

[0038] In some embodiments, the sleeve assembly 106 includes a sleeve body 111 and an elastic element 112. The sleeve body 111 is slidably installed in the liquid inlet channel 104, and the sleeve body 111 is connected to the first stepped platform 107 through the elastic element 112. In this embodiment, when the drilling fluid circulates normally, the drive device 108 pushes the sleeve body 111 downwards by overcoming the elastic force of the elastic element 112 until it engages with the second step platform 109. At this time, the elastic element 112 is in a compressed or stretched state. When it is necessary to close the valve, the driving force of the drive device 108 decreases or disappears, and the sleeve body 111 moves upwards with the assistance of the restoring force of the elastic element 112. By setting the elastic element 112, the contact impact between the sleeve body 111 and the valve body 101 during the up and down movement can be buffered, reducing mechanical wear and extending the overall service life of the valve. The drive device 108 is a conventional hydraulic drive device 108 in the prior art, and its structure and principle will not be described in detail here. The elastic element 112 is a conventional spring structure.

[0039] In some embodiments, the check valve disc 110 is provided with a protrusion 113. In this embodiment, the protrusion 113 is used to cooperate with the stepped surface to achieve a better sealing effect.

[0040] In some embodiments, a first sealing ring 114 is installed on the first stepped platform 107, and a first groove 115 is provided on the sleeve to cooperate with the first sealing ring 114. In this embodiment, when the sleeve body 111 moves upward to the point where the check valve 110 blocks the fluid inlet channel 104, the first sealing ring 114 and the first slot 115 are precisely engaged. The cooperation between the first sealing ring 114 and the first slot 115 ensures that a precise stepped surface is formed between the sleeve body 111 and the first stepped platform 107. This stepped surface, in conjunction with the protrusion 113 on the check valve 110, achieves a better sealing effect. Furthermore, after the first sealing ring 114 is embedded in the first slot 115, it fills the gap between the two under the action of elastic deformation, preventing drilling fluid from leaking from the gap between the sleeve body 111 and the first stepped platform 107. Based on the primary sealing of the fluid inlet channel 104 by the check valve 110, the cooperation between the first sealing ring 114 and the first slot 115 forms a secondary seal, significantly improving the overall sealing level.

[0041] In some embodiments, the second stepped platform 109 is provided with a second sealing ring 116 for engaging with the first slot 115. In this embodiment, when the sleeve body 111 moves downward to be tightly seated with the second stepped platform 109, the first slot 115 of the sleeve body 111 will precisely engage with the second sealing ring 116 on the second stepped platform 109, and the gap will be filled by elastic deformation to ensure that all drilling fluid flows along the flow channel 103; and after the second sealing ring 116 engages with the first slot 115, it can limit the sleeve body 111, ensuring the positional accuracy of the sleeve body 111 when seated with the second stepped platform 109, and ensuring the continuity and integrity of the flow channel.

[0042] In some embodiments, a buffer pad 117 is installed at the bottom end of the check valve disc 110. In this embodiment, the buffer pad 117 is made of rubber material and has an arc surface for engaging with the inner wall of the clearance area. By providing the buffer pad 117, damage can be avoided when the check valve disc 110 collides with the inner wall of the clearance area when it rotates downward into the clearance area.

[0043] In some embodiments, a pad 118 is connected to the sleeve body 111. During the process of connecting the liquid inlet channel 104 and the flow channel 103, when the sleeve body 111 moves down to engage with the second stepped platform 109, the pad 118 contacts the first stepped platform 107 to prevent the elastic element 112 from being over-compressed.

[0044] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modifications, equivalent substitutions and improvements 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 drilling mud valve, comprising a valve body (101) for mounting on a drill string. (102) The drill string (102) is provided with a flow channel (103), characterized in that: It also includes a blocking mechanism (105) and a sleeve assembly (106), and a first stepped platform (107) is provided inside the valve body (101), and the blocking mechanism (105) is rotatably connected to the first stepped platform (107); The valve body (101) is provided with a liquid inlet channel (104), the sleeve assembly (106) is slidably installed in the liquid inlet channel (104), the drill string (102) is provided with a drive device (108) for driving the sleeve assembly (106) to move up and down, and the flow channel (103) is provided with a second step platform (109) for cooperating with the sleeve assembly (106). A clearance area is formed between the first step platform (107) and the second step platform (109).

2. A drilling mud valve according to claim 1, characterized in that: The sealing mechanism (105) includes a check valve (110) and a torsion spring. A rotating shaft is fixedly connected to the check valve (110). The check valve (110) is rotatably connected to the first stepped platform (107) through the rotating shaft. The torsion spring is fitted on the rotating shaft. The check valve (110) is connected to the first stepped platform (107) through the torsion spring.

3. A drilling mud valve according to claim 1, characterized in that: The sleeve assembly (106) includes a sleeve body (111) and an elastic element (112). The sleeve body (111) is slidably installed in the liquid inlet channel (104). The sleeve body (111) is connected to the first stepped platform (107) through the elastic element (112).

4. A drilling mud valve according to claim 2, characterized in that: The check valve disc (110) is provided with a protrusion (113).

5. A drilling mud valve according to claim 3, characterized in that: A first sealing ring (114) is installed on the first stepped platform (107), and the sleeve is provided with a seal that is connected to the first sealing ring (114). The first slot (115) is compatible.

6. A drilling mud valve according to claim 3, characterized in that: The second step (109) is provided with a second sealing ring (116) for engaging with the first slot (115).

7. A drilling mud valve according to claim 2, characterized in that: A buffer pad (117) is installed at the bottom of the check valve disc (110).

8. A drilling mud valve according to claim 3, characterized in that: A pad (118) is connected to the sleeve body (111).

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