Turntable for petroleum drilling machine

Abstract

The utility model provides a rotary table for a petroleum drilling machine, and relates to the technical field of rotary tables of drilling equipment, the rotary table comprises a bottom plate, a supporting table and a top plate which are sequentially arranged from bottom to top, the supporting table and the top plate are welded, the supporting table and the bottom plate are welded, the supporting table is cylindrical, and a second through hole for a bushing to penetrate through is formed in the supporting table. A first through hole corresponding to the supporting table is formed in the position, where the supporting table is installed, of the top plate, and a third through hole corresponding to the supporting table is formed in the position, where the supporting table is installed, of the bottom plate, so that the bushing can sequentially penetrate through the turntable from top to bottom, the turntable is formed by welding plates or pipes, and the machining efficiency of the turntable is greatly improved; and meanwhile, each part is independently processed, so that the yield of products is ensured. In addition, the turntable is formed by welding all parts together, so that the weight of the turntable is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary tables, in particular to a rotary table for an oil drilling rig. Background Art

[0002] In traditional oil drilling rigs, the rotary table is mainly used to support the weight of the drill string, provide torque and rotational speed. In existing oil drilling rigs, a top drive is usually equipped, which can replace some functions of the swivel and the rotary table. The rotary table no longer provides rotary torque and only supports the weight of the drill string. Therefore, the demand for a dummy rotary table that only serves as a support is increasing.

[0003] The existing rotary table is similar in shape to a conventional rotary table, with a regular box-shaped structure, large weight. It is usually installed on the rotary table beam, and a support beam is required to support the rotary table beam, resulting in a relatively high overall height of the rotary table beam. At the same time, the existing rotary table is generally processed by forging, resulting in a relatively long processing time and a high rejection rate. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotary table for an oil drilling rig to solve the technical problems existing in the prior art that the rotary table is a casting and forging part, resulting in a relatively large weight, a long processing cycle, and a high rejection rate. The preferred technical solutions provided by the utility model can produce many technical effects, which will be elaborated below.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rotary table for an oil drilling rig provided by the utility model includes a bottom plate, a support table, and a top plate arranged in sequence from bottom to top. The support table is welded between the support table and the top plate, and between the support table and the bottom plate. The support table is set to be cylindrical, and a second through hole for a bushing to pass through is arranged on the support table. A first through hole corresponding to the support table is arranged at the position where the top plate installs the support table, and a third through hole corresponding to the support table is arranged at the position where the bottom plate installs the support table, so that the bushing passes through the rotary table.

[0007] Preferably, it further includes connecting rib plates, which are arranged between the bottom plate and the top plate and are connected to the support table.

[0008] Preferably, the position where the connecting rib plate is connected to the support table is set as an arc section, and the inner diameter of the arc section is the same as the outer diameter of the support table.

[0009] Preferably, a first groove extending along the extending direction of the first through hole is arranged at the end of the first through hole.

[0010] Preferably, a second groove is provided on the side wall of the first through hole, and the side wall of the second groove is arc-shaped.

[0011] Preferably, the diameter of the first through hole is larger than that of the second through hole, so that a stepped surface is formed between the top plate and the support table.

[0012] Preferably, the length of the connecting rib plate is longer than that of the top plate.

[0013] The technical solutions provided in this application document have the following beneficial effects:

[0014] The utility model provides a rotary table for an oil drilling rig. In the prior art, the rotary table is processed by casting, resulting in a relatively heavy weight of the station plate. It is processed into a blank shape by casting and then into a finished rotary table through finish machining, resulting in a relatively long construction period of the rotary table. At the same time, the yield rate of the processed rotary table is relatively low, and the rejection rate is relatively high. In order to facilitate the processing of the rotary table and change the current situation, the rotary table includes a bottom plate, a support table, and a top plate arranged in sequence from bottom to top. The bottom plate provides support for the support table, and the top plate is installed above the support table. Among them, the support table is welded to the top plate and the bottom plate. The support table is set to be cylindrical, and a second through hole for the bushing to pass through is provided on the support table. A first through hole corresponding to the support table is provided at the position where the top plate installs the support table, and a third through hole corresponding to the support table is provided at the position where the bottom plate installs the support table. In this way, the bushing can pass through the rotary table from top to bottom in sequence. Among them, the bushing is used to support the drill pipe. In order to facilitate the fixation of the rotary table, both ends of the top plate and the bottom plate are used for welding on the rotary table beam. With such a setting, the rotary table is formed by welding plates or pipes, greatly improving the processing efficiency of the rotary table. At the same time, each component is processed separately, ensuring the yield rate of the product. In addition, the rotary table is welded together by each component, greatly reducing the weight of the rotary table. The rotary table is directly welded to the rotary table beam, eliminating the need for a support beam under the conventional rotary table, which can reduce the overall height of the rotary table beam. On the basis of keeping the clearance under the rotary table beam unchanged, the height of the drill floor can be greatly reduced, thereby further reducing the weight of the base and the derrick. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic structural diagram of a rotary table for an oil drilling rig shown according to an exemplary embodiment;

[0017] Figure 2It shows a cross-sectional view of a rotary table for an oil drilling rig according to an exemplary embodiment;

[0018] Figure 3 It shows a schematic structural diagram of a rotary table for an oil drilling rig installed on a rotary table beam according to an exemplary embodiment.

[0019] In the figure: 1, top plate; 11, first groove; 12, second groove; 2, support platform; 3, bottom plate; 4, connecting rib plate; 41, arc section; 5, stepped surface. Specific embodiments

[0020] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present utility model.

[0021] This specific embodiment provides a rotary table for an oil drilling rig, which solves the technical problems in the prior art that the rotary table is a forging, resulting in a relatively large weight, a long processing cycle and a relatively high rejection rate.

[0022] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not limit the content of the utility model described in the claims in any way. Further, all the content shown in the following embodiments is not necessarily required for the solution of the utility model described in the claims.

[0023] Refer to Figures 1 - 3, the present utility model provides a rotary table for an oil drilling rig. In the prior art, the rotary table is processed by casting, resulting in a relatively heavy weight of the rotary table. It is processed into a blank shape by casting and then into a finished rotary table through finishing, resulting in a relatively long construction period of the rotary table. At the same time, the yield rate of the processed rotary table is relatively low, and the rejection rate is relatively high. In order to facilitate the processing of the rotary table and change the current situation, the rotary table includes a bottom plate 3, a support platform 2, and a top plate 1 arranged from bottom to top in sequence. The bottom plate 1 provides support for the support platform 2, and the top plate 1 is installed above the support platform 2. Among them, the support platform 2 is welded between the top plate 1 and the bottom plate 3. The support platform 2 is set to be cylindrical, and a second through hole for the bushing to pass through is provided on the support platform 2. A first through hole corresponding to the support platform 2 is provided at the position where the top plate 1 installs the support platform 2, and a third through hole corresponding to the support platform 2 is provided at the position where the bottom plate 3 installs the support platform 2. In this way, the bushing can pass through the rotary table from top to bottom in sequence. Among them, the bushing is used to support the drill pipe. In order to facilitate the fixation of the rotary table, both ends of the top plate 1 and the bottom plate 3 are respectively used for welding on the rotary table beam. With such a setting, the rotary table is formed by welding plates or pipes, greatly improving the processing efficiency of the rotary table. At the same time, each component is processed separately, ensuring the yield rate of the product. In addition, the rotary table is welded together by each component, greatly reducing the weight of the rotary table. The rotary table is directly welded to the rotary table beam, without the need for a support beam under the conventional rotary table, which can reduce the overall height of the rotary table beam. On the basis of the unchanged clearance under the rotary table beam, the height of the drill floor can be greatly reduced, thereby further reducing the weight of the base and the derrick.

[0024] In a further optimized solution, in order to facilitate the support strength of the rotary table and avoid failures during use, a connecting rib plate 4 is further included. The connecting rib plate 4 is arranged between the bottom plate 3 and the top plate 1, and the connecting rib plate 4 is connected to the support platform 2. The connecting rib plate 4 is used to support the bottom plate 3 and the top plate 1, and at the same time, the connecting rib plate 4 is welded to the support platform 2 to provide support for the support platform 2.

[0025] In a further optimized solution, in order to increase the contact area between the connecting rib plate 4 and the support platform 2, the position where the connecting rib plate 4 is connected to the support platform 2 is set as an arc section 41. In order to be able to contact the support platform 2 over a large area, the inner diameter of the arc section 41 is the same as the outer diameter of the support platform 2, so that the arc section of the connecting rib plate 4 can cooperate with the outer circumference of the support platform 2, and at the same time, the welding position can also be increased.

[0026] In a further optimized solution, in order to facilitate the support of the bushing, the top plate 1 has a certain thickness. A first groove 11 extending along the extending direction of the first through hole is provided at the end of the first through hole. The position of the first groove 11 corresponds to the position of the first protrusion on the bushing, which is convenient for clamping the bushing and avoiding the rotation of the drill bit during use.

[0027] For a further optimized solution, in order to facilitate accommodating the buckle on the reducing bushing, a second groove 12 is provided on the side wall of the first through hole. The side wall of the second groove 12 is arc-shaped, which is convenient for corresponding to the buckle on the reducing bushing so as to better limit the reducing bushing.

[0028] For a further optimized solution, in order to facilitate supporting the reducing bushing, the diameter of the first through hole is larger than that of the second through hole, so that a stepped surface 5 is formed between the top plate 1 and the support table 2. The end surface on the reducing bushing is clamped on the stepped surface 5, and the stepped surface 5 provides support for the reducing bushing.

[0029] For a further optimized solution, since the turntable beam is welded by I-beams or other parts, the space between the upper and lower end surfaces of the turntable beam is relatively small, and the space in the middle position is relatively large. The length of the connecting rib plate 4 is longer than the length of the top plate 1, which is convenient for welding the turntable and the turntable beam.

[0030] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicated in the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of this article, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

[0033] It can be understood that the same or similar parts in the above embodiments can be referred to each other. For the content not detailed in some embodiments, reference can be made to the same or similar content in other embodiments. The multiple solutions provided in this application include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve the joint realization of multiple effects.

[0034] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A turntable for an oil drilling rig, characterized in that: The utility model comprises a bottom plate (3), a support platform (2), and a top plate (1) which are arranged in sequence from bottom to top, the support platform (2) and the top plate (1) are welded, and the support platform (2) and the bottom plate (3) are welded, the support platform (2) is arranged in a cylindrical shape, and a second through hole is arranged on the support platform (2) for a bushing to pass through, a first through hole corresponding to the support platform (2) is arranged at a position where the support platform (2) is mounted on the top plate (1), and a third through hole corresponding to the support platform (2) is arranged at a position where the support platform (2) is mounted on the bottom plate (3), so that the bushing can pass through the rotating disk.

2. The rotary table for oil drilling rig according to claim 1, characterized in that: It also includes a connecting rib plate (4), which is arranged between the bottom plate (3) and the top plate (1), and the connecting rib plate (4) is connected to the support platform (2).

3. The rotary table for oil drilling rig according to claim 2, characterized in that: The position where the connecting rib plate (4) is connected to the support platform (2) is set as a curved surface segment (41), and the inner diameter of the curved surface segment (41) is the same as the diameter of the outer circumference of the support platform (2).

4. The rotary table for oil drilling rig according to claim 1, characterized in that: The end of the first through hole is provided with a first groove (11) penetrating along the extending direction of the first through hole.

5. The rotary table for oil drilling rig according to claim 1, characterized in that: A second groove (12) is provided on the side wall of the first through hole, and the side wall of the second groove (12) is arc-shaped.

6. The rotary table for oil drilling rig according to claim 1, characterized in that: The diameter of the first through hole is greater than the diameter of the second through hole, so that the top plate (1) and the support platform (2) form a step surface (5).

7. The rotary table for oil drilling rig according to claim 2, characterized in that: The length of the connecting rib plate (4) is longer than the length of the top plate (1).

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