A drilling tool top-closing auxiliary tool

Abstract

This utility model discloses an auxiliary tooling for threading drill bits, including a base with base posts at each of the four corners of the lower end face of the base; a square blind hole is formed in the center of the base, and a bearing seat is provided in the square blind hole; a through circular hole is formed in the center of the bearing seat, and a cross post is provided in the through circular hole; a bearing is provided between the cross post and the bearing seat; the cross post includes a guide post, a base plate, and a post body connected sequentially from top to bottom, the guide post is conical, and a spring is sleeved on the post body. This utility model not only reduces the number of times workers need to change the threading auxiliary tooling, reducing the labor intensity of workers, but also effectively solves the problem of difficult threading on site, greatly improving on-site operation efficiency and reducing operational safety risks.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas drilling technology, and in particular to an auxiliary tooling for attaching drill bits. Background Technology

[0002] Currently, the commonly used drilling tool assemblies in the Bohai Oilfield are either PDC / roller cone bits + motor + float valve + stabilizer + directional drilling tools + slap cone + several weighted drill pipes + several drill pipes, or PDC / roller cone bits + rotary steering tools + float valve + slap cone + several weighted drill pipes + several drill pipes. Regardless of the drilling tool assembly, the assembly includes drill bits, variable threads, and subs. During the connection process, workers need to repeatedly change the threading auxiliary tools, such as threading auxiliary tools specifically for roller cone bits and PDC bits, resulting in time-consuming and labor-intensive work on-site. At the same time, during the connection of shorter tools such as drill bits, variable threads, and subs, there is a problem of misalignment during threading, causing difficulties in threading on-site and even causing tool threads to wear out and become unusable. Utility Model Content

[0003] To address the aforementioned technical problems, this invention provides an auxiliary tooling for threading drill bits. This invention not only reduces the number of times workers need to change the auxiliary tooling, thus reducing labor intensity, but also effectively solves the problem of difficult threading on-site, significantly improving on-site work efficiency and reducing operational safety risks.

[0004] This utility model is achieved by adopting the following technical solution.

[0005] A drilling tool upper fastening auxiliary tooling includes a base, with base posts at the four corners of the lower end face of the base; a square blind hole is formed in the center of the base, and a bearing seat is provided in the square blind hole; a through circular hole is formed in the center of the bearing seat, and a cross post is provided in the through circular hole; a bearing is provided between the cross post and the bearing seat; the cross post includes a guide post, a base plate and a post body connected sequentially from top to bottom, the guide post is conical and a spring is sleeved on the post body.

[0006] Furthermore, the base column is positioned on the base in a manner that corresponds to the face of the drilling rig rotary table.

[0007] Furthermore, the size of the square blind hole in the base is the same as the size of the bearing seat.

[0008] Furthermore, the bottom of the square blind hole in the base forms several drainage holes.

[0009] Furthermore, the bearing is an axial thrust bearing.

[0010] Furthermore, the spring is disposed between the base plate and the bearing housing.

[0011] This application has the following beneficial effects.

[0012] 1. This utility model has a simple structure and is easy to process; 2. This utility model reduces the number of times workers need to change the auxiliary tooling for fastening, thus reducing the labor intensity of workers and effectively solving the problem of difficulty in fastening on site; 3. This utility model has strong versatility and wide adaptability. Attached Figure Description

[0013] Figure 1 This is the front view of this utility model; Figure 2 This is a top view of the base of this utility model.

[0014] Among them, 1. cross post; 11. guide post; 12. base plate; 13. post body; 2. spring; 3. bearing; 4. bearing seat; 5. base; 51. base post; 52. drain hole. Detailed Implementation

[0015] The present patent application will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1-2 As shown, a drilling tool upper buckling auxiliary tooling mainly consists of a cross post 1, a spring 2, a bearing 3, a bearing seat 4, and a base 5.

[0017] The cross post 1 is designed in a cross shape, including a guide post 11, a base plate 12, and a post body 13 connected from top to bottom. The guide post 11 is designed in a conical shape, which is mainly to facilitate the introduction of tools such as connecting short sections; the base plate 12 is set horizontally, and the post body 13 is designed in a cylindrical shape.

[0018] The spring 2 is sleeved on the column 13, with its two ends abutting against the lower surface of the base plate 12 and the upper surface of the bearing seat 4, respectively. The spring 2 is made of 65Mn, and its elastic force is determined according to the weight of the connecting section.

[0019] The bearing 3 is located between the lower part of the column body 13 and the bearing seat 4. The bearing 3 is an axial thrust bearing, which mainly bears the axial force generated by the weight of the cross column 1 and the tool to be connected.

[0020] The bearing housing 4 is designed as a square shape, with a through circular hole in the center for mounting the cross post 1; a bearing groove for mounting the bearing 3 is formed outward from the through circular hole in the bearing housing 4.

[0021] The base 5 is designed as a square, with a square blind hole of the same size as the bearing seat 4 in the center for mounting the bearing seat 4. Base posts 51 are provided at the four corners of the lower end face of the base 5, corresponding to the holes on the drilling rig rotary table. Five drainage holes 52 are provided at the bottom of the square blind holes in the base 5 (one at the center of the bottom of the square blind hole, and one at each of the four corners) to drain fluid accumulated in the square blind holes of the base 5.

[0022] When assembling drill bits, when connecting PDC / roller cone drill bits, remove the bearing housing 4 from the base 5, separating the two. Place the remaining base 5 on the drill table rotary table, inserting the base post 51 into the corresponding hole on the rotary table. Install the dedicated PDC / roller cone drill bit top-locking auxiliary tooling into the square blind hole of the base 5. This eliminates the need for workers to repeatedly change the dedicated PDC / roller cone drill bit top-locking auxiliary tooling, allowing for shared use of the base 5. Only the corresponding drill bit top-locking auxiliary clamp needs to be replaced. When connecting shorter tools such as variable threads and short sections, the shorter tool is placed on the guide post 11. The axial force generated by its own weight will compress the spring 2, but the cross post 1 and bearing housing 4 can still rotate. Since the guide post 11 does not restrict the freedom of the shorter tool, the probability of thread failure due to misalignment wear of the connected tool is significantly reduced. This utility model effectively solves the problem of difficult on-site threading, greatly improves on-site operation efficiency, and reduces operational safety risks.

[0023] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A drilling tool upper buckling auxiliary fixture, characterized in that: The base (5) includes a base column (51) at each of the four corners of the lower end face of the base (5); a square blind hole is formed in the center of the base (5), a bearing seat (4) is provided in the square blind hole, a through circular hole is formed in the center of the bearing seat (4), a cross column (1) is provided in the through circular hole, and a bearing (3) is provided between the cross column (1) and the bearing seat (4); the cross column (1) includes a guide column (11), a base plate (12) and a column body (13) connected from top to bottom, the guide column (11) is conical, and a spring (2) is sleeved on the column body (13).

2. The auxiliary tooling for threading drill bits according to claim 1, characterized in that: The base column (51) is positioned on the base (5) in a manner that corresponds to the face of the drilling rig rotary table.

3. The auxiliary tooling for threading drill bits according to claim 1, characterized in that: The size of the square blind hole in the base (5) is the same as the size of the bearing seat (4).

4. The auxiliary tooling for threading drill bits according to claim 1, characterized in that: The bottom of the square blind hole of the base (5) forms several drainage holes (52).

5. The auxiliary tooling for threading drill bits according to claim 1, characterized in that: The bearing (3) is an axial thrust bearing.

6. The make-up assist tool of claim 1, wherein: The spring (2) is disposed between the base plate (12) and the bearing seat (4).

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