A wellhead for use in drilling a wellbore

Abstract

The utility model discloses a wellhead joint for casing drilling, contains circulation head and guide head, the guide head removeably with circulation head be connected, the head of circulation head is equipped with first connection female buckle, the tail of circulation head is equipped with first connection male buckle and inner connection fine buckle, the guide head contains tubular guide pipe body, the tail lateral wall of guide pipe body is equipped with several even distribution's guide wing, the head of guide pipe body is equipped with second connection male buckle, second connection male buckle with inner connection fine buckle is matched. The utility model discloses the wellhead joint for casing drilling as top drive and casing connection's conversion joint can be used for casing drilling speed -up, simple structure, stable, stable performance, can be repeatedly used, ensure that circulation joint can with casing smooth and be connected, avoid the mistake of locking, obvious effect. The wellhead joint for casing drilling can replace casing holder, improve operation efficiency, reduce operation cost.

Description

Technical Field

[0001] This utility model relates to a drilling equipment, and more specifically, a wellhead connector for casing drilling. Background Technology

[0002] Casing drilling refers to the process of directly transmitting mechanical and hydraulic energy downhole through casing during drilling. The downhole drill string is attached to the casing string, and the casing is run in and out of the well as drilling progresses. After drilling is complete, the casing used as the drill string remains in the well for well completion. This method significantly improves drilling efficiency, reduces downhole accidents, and saves drilling costs. During casing drilling, top drives and casing holders are typically used to rotate the casing. However, casing holders are expensive to use, complex to install and maintain, and require significant additional time, leading to increased non-productive time. Utility Model Content

[0003] Therefore, it is necessary to provide a wellhead connector for casing drilling to address the aforementioned technical problems.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A wellhead connector for casing drilling, characterized in that the wellhead connector for casing drilling includes a circulation head and a guide head, wherein the guide head is detachably connected to the circulation head. The head of the circulation head is provided with a first connecting female buckle, and the tail of the circulation head is provided with a first connecting male buckle and an inner connecting fine buckle. The guide head includes a tubular guide tube body, and a plurality of evenly distributed guide wings are provided on the tail side wall of the guide tube body. The head of the guide tube body is provided with a second connecting male buckle, which cooperates with the inner connecting fine buckle.

[0005] In a preferred embodiment of the present invention, the guide wing includes a first guide angle and a second guide angle, wherein the first guide angle has an angle of 45 degrees and the second guide angle has an angle of 30 degrees.

[0006] In a preferred embodiment of this utility model, the number of guide wings is 6.

[0007] The surface of the circulation head is provided with a heat-treated layer.

[0008] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a wellhead connector for casing drilling. This wellhead connector serves as a conversion connector for connecting the top drive and the casing, enabling faster casing drilling. It features a simple and stable structure, consistent performance, and reusability. It ensures smooth connection between the circulating connector and the casing, preventing mis-connection and demonstrating significant effectiveness. This wellhead connector can replace the casing clamp, improving operational efficiency and reducing operating costs. Attached Figure Description

[0009] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structural diagram of the circulation head of the wellhead connector for casing drilling according to this utility model. Figure 2 for Figure 1 A three-dimensional structural diagram of the guide head of the wellhead connector for casing drilling. Figure 3 for Figure 2 A three-dimensional structural diagram of the guide head, providing another perspective; Figure 4 This is a schematic diagram of the wellhead connector for casing drilling according to this utility model. At this time, the casing has not yet been connected. Figure 5 This is a schematic diagram of the wellhead connector for casing drilling according to this utility model. At this point, the casing is connected. The markings in the diagram are explained as follows: 1. Circulation head; 11. First connecting female thread; 12. First connecting male thread; 13. Inner connecting fine thread; 2. Guide head; 20. Guide tube body; 21. Second connecting male thread; 22. Guide wing; 221. First guide angle; 222. Second guide angle. Detailed Implementation

[0011] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0012] like Figures 1 to 3 As shown, the wellhead connector for casing drilling includes a circulation head 1 and a guide head 2, which is detachably connected to the circulation head 1.

[0013] The head of the circulation head 1 is provided with a first connecting female buckle 11, and the tail of the circulation head 1 is provided with a first connecting male buckle 12 and an inner connecting fine buckle 13.

[0014] The guide head 2 includes a tubular guide tube body 20. The tail side wall of the guide tube body 20 is provided with a plurality of evenly distributed guide wings 22. The head of the guide tube body 20 is provided with a second connecting male buckle 21, which cooperates with the inner connecting thin buckle 13.

[0015] The guide wing 22 includes a first guide angle 221 and a second guide angle 222, the first guide angle 221 having an angle of 45 degrees and the second guide angle 222 having an angle of 30 degrees.

[0016] It should be noted that there are 6 of these guide vanes 22.

[0017] In addition, the surface of the circulation head 1 is provided with a heat treatment layer to extend its service life.

[0018] The following describes the working method of the wellhead connector for casing drilling, including the steps: Step S1, as follows Figure 4 As shown, the head of the circulation head 1 is connected to the top drive (not shown in the figure) using the first connecting female buckle 11; Step S2: Using the second connecting male buckle 21 and the inner connecting fine buckle 13, fix the guide head 2 to the tail of the circulation head 1, as follows. Figure 3 As shown; Step S3: Using the first connecting male thread 12, connect the circulation head 1 to the lower sleeve 3, as follows. Figure 5 As shown. At this point, pay attention to the tightening torque to avoid damaging the circulation head; Step S4: The top drive drives the casing 3 to rotate and drill through the wellhead connector; Step S5: Repeat steps S3 and S4; Step S6: After the first connecting male buckle 12 of the circulation head 1 reaches the preset number of buckles, replace the circulation head 1 with a new one and repeat the above steps.

[0019] This utility model discloses a wellhead connector for casing drilling, which serves as a conversion connector for connecting the top drive and the casing. It can be used to accelerate casing drilling, featuring a simple and stable structure, consistent performance, and reusability. It ensures smooth connection between the circulating connector and the casing, preventing mis-connection and demonstrating significant effectiveness. This wellhead connector for casing drilling can replace the casing clamp, improving operational efficiency and reducing operating costs.

[0020] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A wellhead connector for casing drilling, characterized in that, The wellhead connector for casing drilling includes a circulation head (1) and a guide head (2), wherein the guide head (2) is detachably connected to the circulation head (1). The head of the circulation head (1) is provided with a first connecting female buckle (11), and the tail of the circulation head (1) is provided with a first connecting male buckle (12) and an inner connecting fine buckle (13). The guide head (2) includes a tubular guide tube body (20), and the tail side wall of the guide tube body (20) is provided with a number of evenly distributed guide wings (22). The head of the guide tube body (20) is provided with a second connecting male buckle (21), and the second connecting male buckle (21) cooperates with the inner connecting fine buckle (13).

2. The wellhead connector for casing drilling according to claim 1, characterized in that, The guide wing (22) includes a first guide angle (221) and a second guide angle (222), wherein the first guide angle (221) has an angle of 45 degrees and the second guide angle (222) has an angle of 30 degrees.

3. The wellhead connector for casing drilling according to claim 1, characterized in that, The number of guide vanes (22) is 6.

4. The wellhead connector for casing drilling according to claim 1, characterized in that, The surface of the circulation head (1) is provided with a heat treatment layer.

Images