A mud splash-proof box

Abstract

The present application belongs to the technical field of oil drilling, and particularly relates to a mud splash-proof box. The mud splash-proof box comprises: a swing arm rotatably arranged on a drilling table surface along a vertical direction, wherein a mud channel is arranged in the swing arm; a mud barrel capable of being opened and closed is connected with the swing arm, and an inner cavity of the mud barrel is in communication with the mud channel; and the mud barrel is configured to wrap at least part of structures of a drill pipe joint and a top drive after being closed.

Description

Technical Field

[0001] This invention belongs to the field of oil drilling technology, specifically, it relates to a mud splash guard. Background Technology

[0002] In the existing technology, there are many types of mud splash guards, some of which are installed on the drill bit and others are designed independently. Most of these mud splash guards are designed with left and right openings to protect the drill pipe coupling and prevent mud from spraying from the drill pipe coupling during tripping.

[0003] Most existing mud splash guards are installed at the front of the iron drill bit, which can easily interfere with other equipment on the drill table and lacks flexibility. Mud splash guards only protect the drill pipe coupling, preventing mud jetting during tripping, but they cannot completely prevent mud backflow and leakage of residual mud from the top drive. When the backflow is large, it can cause a significant amount of mud to be sprayed onto the drill table. Furthermore, the existing design of mud splash guards can cause incomplete mud flow; some unexploded mud will spill onto the drill table when the box is opened and closed.

[0004] Therefore, there is an urgent need to develop a mud splash prevention box that can solve the above-mentioned technical problems. Summary of the Invention

[0005] In view of the technical problems described above, the present invention aims to provide a mud splash shield that can solve at least one of the above technical problems.

[0006] According to the present invention, a mud splash shield is provided, comprising:

[0007] A rocker arm, which rotates vertically along its axis, is mounted on the drilling platform and has a mud channel inside it.

[0008] A mud cylinder that can be opened and closed is connected to the swing arm, and the inner cavity of the mud cylinder is in communication with the mud channel;

[0009] The mud cylinder is designed to enclose at least part of the drill pipe joint and top drive structure when closed.

[0010] In one specific embodiment, the mud cylinder has a polygonal cross-section and reinforcing ribs are provided on the sidewalls of the mud cylinder.

[0011] In one specific embodiment, the mud cylinder includes a supporting half-cylinder connected to the swing arm and an opening and closing half-cylinder hinged to the supporting half-cylinder. The hinge axis of the supporting half-cylinder and the opening and closing half-cylinder is arranged vertically on the side of the supporting half-cylinder away from the swing arm.

[0012] In one specific embodiment, an opening and closing hinge is provided between the supporting half-cylinder and the opening and closing half-cylinder, thereby connecting the supporting half-cylinder and the opening and closing half-cylinder. An opening and closing hydraulic cylinder for controlling opening and closing is provided between the supporting half-cylinder and the opening and closing half-cylinder.

[0013] In one specific embodiment, a sealing rubber is provided at the bottom inner side of the mud cylinder, and the upper end surface of the sealing rubber is constructed as an inclined surface that gradually decreases towards the mud channel.

[0014] In one specific embodiment, the sealing rubber is detachably disposed at the bottom inner side of the mud cylinder.

[0015] In one specific embodiment, the lowest point of the upper end face of the sealing rubber is higher than the lower end of the port of the mud channel.

[0016] In one specific embodiment, the mud channel is configured as an inclined shape that gradually decreases in the direction away from the mud cylinder.

[0017] In one specific embodiment, the swing arm includes an inclined section and a vertical section, the vertical section is rotatably mounted on the drilling platform, and the two ends of the inclined section are respectively connected to the upper end of the vertical section and the mud cylinder.

[0018] In one specific embodiment, the swing arm is rotatably mounted on the drilling platform via a rotary support assembly.

[0019] Compared with the prior art, the advantages of this application are as follows.

[0020] The mud cylinder of the present invention, by lengthening and increasing its height and internal volume, can enclose the drill pipe joints, as well as the top drive's bell mouth, back clamp, protective joint, and other structures, thereby preventing backflow of mud and the outflow of residual mud in the top drive.

[0021] This invention features a sealing rubber at the bottom of the mud cylinder to seal and enclose the drill pipe. The upper surface of the sealing rubber is inclined. Furthermore, the upper surface of the sealing rubber is inclined at an angle greater than 8 degrees, and the lowest point of the sealing rubber is higher than the lower end of the mud channel port. This design allows the mud to flow completely and quickly out of the mud cylinder. The sealing rubber at the bottom of the mud cylinder is designed to be replaceable to accommodate drill pipes of different diameters.

[0022] The mud channel of the swing arm is designed with a height and slope greater than 5 degrees, which allows the mud to flow out of the mud cylinder completely and quickly.

[0023] The present invention can adjust the position of the mud cylinder through the rotary support assembly. When it is necessary to avoid or not use the mud cylinder, the mud cylinder can be moved to an empty area outside the wellhead. When the mud cylinder needs to work, it can be moved to the drill pipe where splash protection is required. Attached Figure Description

[0024] The present invention will now be described with reference to the accompanying drawings.

[0025] Figure 1 This shows a front view of the mud splash guard box when it is opened according to the present invention;

[0026] Figure 2 This shows a top view of the mud splash guard box when it is opened according to the present invention;

[0027] Figure 3 The diagram shows a front view of the mud splash guard box when it is closed, according to the present invention.

[0028] Figure 4 This shows a side view of the mud splash guard box when it is closed, according to the present invention.

[0029] Figure 5 A top view of the mud splash guard box with the device closed, according to the present invention, is shown.

[0030] The reference numerals in the figure are as follows:

[0031] 1. Opening / closing half-cylinder; 2. Opening / closing hydraulic cylinder; 3. Sealing rubber; 4. Drill rod hole; 5. Supporting half-cylinder; 6. Mud outlet pipe; 7. Swing arm; 71. Mud channel; 72. Inclined section; 73. Vertical section; 8. Connecting flange; 9. Rotary support assembly; 10. Support plate; 11. Mud outlet hole; 12. Support base; 13. Opening / closing hinge; 20. Mud cylinder; 100. Mud splash guard.

[0032] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0033] The invention will now be described with reference to the accompanying drawings.

[0034] It should be noted that the directional terms or qualifiers used in this application, such as "up," "down," "front," "back," "left," and "right," are all specific to the referenced material. Figure 1 In other words, they are not used to define the absolute position of the components involved, but can vary depending on the specific circumstances.

[0035] Figure 1 The structure of the mud splash shield 100 according to the present invention is shown. (See diagram below.) Figures 1-5 As shown, the mud splash shield 100 mainly includes a swing arm 7 and a mud cylinder 20.

[0036] In this embodiment, the swing arm 7 is rotatably mounted on the drill platform (not shown in the figure), with its rotation axis set vertically. The mud cylinder 20 is located at the end of the swing arm 7 furthest from the rotary support assembly 9. With this configuration, rotating the swing arm 7 allows the mud cylinder 20 to move on the drill platform, enabling it to be moved up to the drill pipe during operation and to a neutral position when not in use, thus preventing the mud cylinder 20 from interfering with other tools on the drill platform.

[0037] The mud cylinder 20 includes a supporting half-cylinder 5 and an opening / closing half-cylinder 1, which are connected to each other by a hinge. The hinge axis of the supporting half-cylinder 5 and the opening / closing half-cylinder 1 is arranged vertically on the side of the supporting half-cylinder 5. The bottom side of the supporting half-cylinder 5 is connected to the swing arm 7, and the inner cavity of the supporting half-cylinder 5 communicates with the mud channel 71 of the swing arm 7. In this configuration, when the supporting half-cylinder 5 and the opening / closing half-cylinder 1 are opened, the mud cylinder 20 moves to the drill pipe at the wellhead on the drilling platform under the action of the swing arm 7. Then, the supporting half-cylinder 5 and the opening / closing half-cylinder 1 close, enclosing the drill pipe joint. The mud at the drill pipe joint is collected by the closed supporting half-cylinder 5 and the opening / closing half-cylinder 1, and then the mud is discharged through the mud channel 71 in the swing arm 7.

[0038] According to the present invention, the mud cylinder 20 is configured to enclose at least a portion of the drill pipe joint and the top drive structure when closed. Specifically, the height of the supporting half-cylinder 5 and the opening / closing half-cylinder 1 is higher than the height of a conventional mud splash guard, so that when the supporting half-cylinder 5 and the opening / closing half-cylinder 1 are closed, they can also enclose at least the drill pipe joint and the top drive's bell mouth, back clamp, and protective joint. With this configuration, the mud cylinder 20 can prevent backflow of mud and the outflow of residual mud in the top drive.

[0039] In one specific embodiment, the mud cylinder 20 (opening half-cylinder 1 and supporting half-cylinder 5) has a height of 1.2 meters and a large internal volume. This design is to enclose the drill pipe joint, the top drive's bell mouth, back clamp, protective joint, and other equipment within the mud cylinder 20. This invention increases the height and internal volume of the mud cylinder 20, which weakens its strength and rigidity. After analyzing the structural strength and rigidity of the cylinder, this invention strengthens the opening half-cylinder 1 and supporting half-cylinder 5. Firstly, eight vertical reinforcing ribs are evenly welded along the circumference of the outer side of the mud cylinder 20, and six horizontal reinforcing ribs are evenly arranged from top to bottom. Secondly, the mud cylinder 20 abandons the traditional cylindrical structure and is designed as a polygonal structure. In this embodiment, it is set as an octagonal structure, which not only adapts to the shape of the top drive's back clamp but also increases the bending angles of the mud cylinder 20, thus strengthening the overall structure of the mud cylinder 20.

[0040] In one specific embodiment, an opening and closing hinge 13 is provided between the supporting semi-cylinder 5 and the opening and closing semi-cylinder 1, thereby hinged the supporting semi-cylinder 5 and the opening and closing semi-cylinder 1. Figure 4 As shown, two opening and closing hinges 13 are arranged at intervals along the vertical direction. An opening and closing hydraulic cylinder 2 is provided between the supporting semi-cylinder 5 and the opening and closing semi-cylinder 1 to control its opening and closing. Figure 4 As shown, the two opening and closing liquid cylinders 2 are arranged at intervals along the vertical direction, and the two opening and closing liquid cylinders 2 are respectively arranged on the upper and lower sides of the opening and closing hinge 13.

[0041] When the opening and closing cylinder 2 retracts, the opening and closing semi-cylinder 1 rotates along the opening and closing hinge 13, and the mud cylinder 20 opens. When the opening and closing cylinder 2 extends, the opening and closing semi-cylinder 1 rotates along the opening and closing hinge 13, and the mud cylinder 20 closes.

[0042] In one specific embodiment, both the opening and closing hinge 13 and the opening and closing hydraulic cylinder 2 are located on the side of the supporting semi-cylinder 5 away from the swing arm 7 to avoid interference with the swing arm.

[0043] Rubber is designed on the contact surface between the supporting semi-cylinder 5 and the opening and closing semi-cylinder 1, which can play a sealing role and prevent mud leakage.

[0044] According to the present invention, a sealing rubber 3 is provided at the bottom inner side of the mud cylinder 20, and the upper end surface of the sealing rubber 3 is constructed as an inclined surface that gradually decreases towards the mud channel 71. With this arrangement, the mud in the mud cylinder 20 can flow along the sealing rubber 3 to the mud channel 71 of the swing arm 7, thus preventing the mud from remaining in the mud cylinder 20.

[0045] In one specific embodiment, the bottom surface of the supporting semi-cylinder 5 and the opening / closing semi-cylinder 1 is configured as a support plate 10, and the sealing rubber 3 is disposed on the support plate 10. After the supporting semi-cylinder 5 and the opening / closing semi-cylinder 1 are closed together, the support plate 10 and the sealing rubber 3 of both are also closed, and a circular hole is opened in the middle of the support plate 10 and the sealing rubber 3 after they are closed together. That is, semi-circular holes are provided at the closed contact edges of the support plate 10 and the sealing rubber 3 of the supporting semi-cylinder 5 and the opening / closing semi-cylinder 1. After the supporting semi-cylinder 5 and the opening / closing semi-cylinder 1 are closed, the support plate 10 and the sealing rubber 3 of both are closed together, making the semi-circular holes become circular holes. The circular hole on the sealing rubber 3 seals and abuts against the outer wall of the drill rod, thereby holding the drill rod and preventing mud from flowing out along the drill rod.

[0046] In a preferred embodiment, the sealing rubber 3 is detachably mounted on the support plate 10. The circular hole in the center of the sealing rubber 3 serves as a drill rod hole 4, and the diameter of the circular hole in the support plate 10 is larger than that of the drill rod hole 4. With this configuration, when dealing with drill rods of different diameters, only the sealing rubber 3 with drill rod holes 4 of different sizes needs to be replaced. For example, when the size of the circular hole on the support plate 10 is larger than that of a 6-5 / 8 inch drill rod, by replacing the sealing rubber 3 with drill rod holes 4 of different sizes, drill rods with diameters ranging from 2-3 / 8 inch to 6-5 / 8 inch can be accommodated.

[0047] In one specific embodiment, the sealing rubber 3 is designed as a slope with an inclination angle greater than 8 degrees. The sealing rubber 3 is thinner on the side closer to the swing arm 7 and thicker on the side farther from the swing arm 7. This design allows the mud to flow quickly from the mud cylinder 20 along the slope of the sealing rubber 3 to the mud channel 71 of the swing arm 7, while also reducing the instantaneous volume of mud in the mud cylinder 20 and minimizing the impact on the strength of the mud cylinder 20.

[0048] Preferably, the lowest point of the sealing rubber 3 (near the swing arm 7) is slightly higher than the bottom of the inlet of the mud channel 71 of the swing arm 7. This design allows all the mud in the mud cylinder 20 to flow into the mud channel 71 along the sealing rubber 3.

[0049] In one specific embodiment, a mud outlet pipe 6 is provided on the lower outer side of the supporting semi-cylinder 5. The mud outlet pipe 6 is connected to the swing arm 7, and the inner cavity of the mud outlet pipe 6 is part of the mud channel 71. The left port of the mud outlet pipe 6 is the mud outlet hole 11. Figure 1 As shown, the upper right end of the sealing rubber 3 is higher than the lower edge of the mud outlet hole 11 at the left end of the mud outlet pipe 6, so that the mud in the mud cylinder 20 flows into the mud channel 71 along the sealing rubber 3.

[0050] In one specific embodiment, the mud channel 71 is configured with an inclined shape that gradually decreases in the direction away from the mud cylinder 20. For example... Figure 1 As shown, the swing arm 7 has an approximately "L"-shaped structure, including an inclined section 72 and a vertical section 73. The central axis of the vertical section 73 is set vertically, and the lower end of the vertical section 73 is rotatably mounted on the drill platform. The inclined section 72 is constructed with the end near the mud cylinder 20 higher than the end near the vertical section 73. The higher end of the inclined section 72 is connected to the mud outlet pipe 6 via a flange, and the lower end of the inclined section 72 is connected to the upper end of the vertical section 73. Furthermore, the inclination angle of the inclined section 72 is greater than 5 degrees, which allows the mud to flow out completely and quickly. The mud in the mud cylinder 20 flows through the mud channel 71 of the swing arm 7 to the mud collection point below the drill platform.

[0051] In one specific embodiment, the vertical section 73 of the swing arm 7 is rotatably mounted on the drilling platform via the rotary support assembly 9. For example... Figure 1 As shown, a support base 12 is fixedly installed on the drilling platform. The lower end of the rotary support assembly 9 is fixedly connected to the support base 12 by bolts. The vertical section 73 is coaxially rotatably installed inside the rotary support assembly 9. The rotary support assembly 9 is driven by a driver (motor, hydraulic motor, etc.), which in turn drives the mud cylinder 20 to move on the drilling platform via the swing arm 7. When the mud cylinder 20 needs to work at the wellhead, the rotary support assembly 9 rotates, rotating the opening and closing half-cylinder 1 and the supporting half-cylinder 5 to the wellhead position. During the rotation, the opening and closing hydraulic cylinder 2 retracts, opening the mud cylinder 20. When the mud cylinder 20 moves to the wellhead and corresponds to the drill pipe inside the wellhead, the opening and closing hydraulic cylinder 2 extends, closing the mud cylinder 20. When the mud cylinder 20 is not working, the rotary support assembly 9 rotates, moving the mud cylinder 20 to an empty position.

[0052] In the description of this invention, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In this 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the 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.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing 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 invention should be included within the protection scope of the present invention.

Claims

1. A mud splash shield, characterized in that, include: A swing arm (7) with its rotation axis rotating vertically is mounted on the drilling platform, and a mud channel (71) is provided inside the swing arm (7). A mud cylinder (20) that can be opened and closed is connected to the swing arm (7), and the inner cavity of the mud cylinder (20) is connected to the mud channel (71); The mud cylinder (20) is constructed to enclose at least part of the structure of the drill pipe joint and the top drive when closed.

2. The mud splash shield according to claim 1, characterized in that, The mud cylinder (20) has a polygonal cross-section and is provided with reinforcing ribs on its side walls.

3. The mud splash shield according to claim 2, characterized in that, The mud cylinder (20) includes a supporting half-cylinder (5) connected to the swing arm (7) and an opening and closing half-cylinder (1) hinged to the supporting half-cylinder (5). The hinge axis of the supporting half-cylinder (5) and the opening and closing half-cylinder (1) is arranged vertically on the side of the supporting half-cylinder (5) away from the swing arm (7).

4. The mud splash shield according to claim 3, characterized in that, An opening and closing hinge (13) is provided between the supporting half-cylinder (5) and the opening and closing half-cylinder (1) so that the supporting half-cylinder (5) and the opening and closing half-cylinder (1) are hinged together. An opening and closing hydraulic cylinder (2) for controlling opening and closing is provided between the supporting half-cylinder (5) and the opening and closing half-cylinder (1).

5. The mud splash shield according to any one of claims 1 to 4, characterized in that, A sealing rubber (3) is provided at the bottom inner side of the mud cylinder (20), and the upper end surface of the sealing rubber (3) is constructed as an inclined surface that gradually decreases towards the mud channel (71).

6. The mud splash shield according to claim 5, characterized in that, The sealing rubber (3) is detachably disposed on the inner bottom of the mud cylinder (20).

7. The mud splash shield according to claim 5, characterized in that, The lowest point of the upper end face of the sealing rubber (3) is higher than the lower end of the port of the mud channel (71).

8. The mud splash shield according to claim 5, characterized in that, The mud channel (71) is constructed in an inclined shape that gradually decreases in the direction away from the mud cylinder (20).

9. The mud splash shield according to claim 8, characterized in that, The swing arm (7) includes an inclined section (72) and a vertical section (73). The vertical section (73) is rotatably mounted on the drilling platform. The two ends of the inclined section (72) are respectively connected to the upper end of the vertical section (73) and the mud cylinder (20).

10. The mud splash shield according to any one of claims 1 to 4, characterized in that, The swing arm (7) is rotatably mounted on the drilling platform via the rotary support assembly (9).

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