Rotary tool for drifting

Abstract

The utility model discloses a rotating tool for drifting, which comprises an upper joint, and the upper part of the upper joint is connected with an upper drilling tool; the rotating body is connected to the lower part of the upper joint and is rotationally connected with the upper joint; the guiding shoe is connected with the lower part of the rotating body; an impeller is arranged in an inner cavity of the rotating body, and the lower portion of the impeller is connected with the guiding shoe. Liquid entering the inner cavity of the upper connector is used for driving the impeller to rotate, and the impeller drives the guiding shoe and the rotating body to rotate relative to the upper connector. According to the rotating tool, the working principle of a screw rod is combined, the impeller is designed in the rotating tool through hydraulic calculation, the impeller is driven by liquid to rotate so as to drive the guiding shoe and the rotating body to rotate, the upper connector and the upper drilling tool are kept not rotating, a well wall can be locally and accurately trimmed, micro steps of a shaft are damaged, and the drifting efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to a rotary tool for well flushing. Background Art

[0002] In the process of drilling construction, wellbore instability often occurs due to reasons such as water invasion and hydraulic fracturing of adjacent wells. During the process of flushing the well with a drill bit, it is impossible to effectively avoid or break the "micro-steps" and "big bellies" in the wellbore, and the situation of drilling new holes often occurs. As a result, the footage is scrapped and the economic loss is huge. During the rotation of the drill string, the drill pipe collar frequently touches the wellbore wall, which is likely to cause the wellbore wall to slough off, resulting in a slow well flushing progress.

[0003] Therefore, based on the above technical problems, those skilled in the art urgently need to develop a rotary tool for well flushing. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotary tool for well flushing, which can solve the problems of the drill bit flushing the well and creating new holes, and the difficulty in accurately breaking the micro-steps, avoid the problem of the drill pipe collar frequently touching the wellbore wall, and improve the well flushing efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A rotary tool for well flushing of the utility model, the rotary tool comprising:

[0007] An upper sub, the upper part of the upper sub is connected to an upper drill string;

[0008] A rotating body connected to the lower part of the upper sub, the rotating body and the upper sub are rotatably connected; and

[0009] A guide shoe connected to the lower part of the rotating body;

[0010] An impeller is arranged in the inner cavity of the rotating body, and the lower part of the impeller is connected to the guide shoe;

[0011] The liquid entering the inner cavity of the upper sub is used to drive the impeller to rotate, and the impeller drives the guide shoe and the rotating body to rotate relative to the upper sub.

[0012] Further, the inner wall of the upper part of the upper sub has internal threads of the upper sub;

[0013] The upper drill string is threadedly connected to the upper sub through the external threads on its outer wall to the internal threads of the upper sub;

[0014] A plurality of ball groove slides are processed at intervals on the inner wall of the lower part of the upper sub, and balls are embedded in the ball groove slides;

[0015] The outer wall of the upper part of the rotating body is rotatably connected to the lower part of the upper sub through a plurality of the balls.

[0016] Furthermore, an O-ring is provided at the connection between the rotating body and the upper sub;

[0017] A welding cover is provided outside the ball raceway slideway.

[0018] Furthermore, the lower part of the rotating body has an external thread of the rotating body;

[0019] The rotating body is threadedly connected to the guide shoe through the external thread of the rotating body, and an O-ring is provided between the guide shoe and the rotating body.

[0020] Furthermore, the inner wall of the upper part of the guide shoe has a first internal thread of the guide shoe, and the inner wall of the middle part of the guide shoe has a second internal thread of the guide shoe;

[0021] The guide shoe is threadedly connected to the external thread of the rotating body of the rotating body through the first internal thread of the guide shoe;

[0022] The impeller is threadedly connected to the second internal thread of the guide shoe of the guide shoe.

[0023] Furthermore, the impeller includes:

[0024] An impeller shaft; and

[0025] A plurality of blades formed on the outer periphery of the impeller shaft;

[0026] The liquid entering the inner cavity of the upper sub can drive the impeller to rotate through the blades.

[0027] Furthermore, the guide shoe has a plurality of water eyes;

[0028] The liquid in the tool flows out through the water eyes.

[0029] Furthermore, one end of the impeller shaft close to the upper sub has an upper cone, and the liquid is drained to the blades through the upper cone.

[0030] In the above technical solution, a rotary tool for well flushing provided by the present utility model has the following beneficial effects:

[0031] The rotary tool of the present utility model combines the working principle of a screw. Through hydraulic calculation, an impeller is designed inside. The impeller rotates under the drive of the liquid to drive the guide shoe and the rotating body to rotate, while the upper sub and the upper drill tool remain stationary, which can achieve local precise trimming of the wellbore, destroy the "micro-step" of the wellbore, and effectively improve the well flushing efficiency. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments described in the present utility model. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a schematic structural diagram of a rotary tool for well flushing disclosed in the embodiments of the present application.

[0034] Explanation of reference numerals:

[0035] 1. Upper sub; 2. O-ring; 3. Ball; 4. Welded cover; 5. Rotating body; 6. Impeller; 7. Guide shoe;

[0036] 101. Internal thread of upper sub; 102. Ball groove slideway;

[0037] 601. Impeller shaft; 602. Blade; 603. Upper cone;

[0038] 701. First internal thread of guide shoe; 702. Second internal thread of guide shoe; 703. Water eye. Detailed implementation manners

[0039] To enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the accompanying drawings.

[0040] See Figure 1 as shown;

[0041] This embodiment discloses a rotary tool for well flushing, and the rotary tool includes:

[0042] An upper sub 1, the upper part of the upper sub 1 is connected to the upper drill string;

[0043] A rotating body 5 connected to the lower part of the upper sub 1, the rotating body 5 and the upper sub 1 are rotatably connected; and

[0044] A guide shoe 7 connected to the lower part of the rotating body 5;

[0045] An impeller 6 is arranged in the inner cavity of the rotating body 5, and the lower part of the impeller 6 is connected to the guide shoe 7;

[0046] The liquid entering the inner cavity of the upper sub 1 is used to drive the impeller 6 to rotate, and the impeller 6 drives the guide shoe 7 and the rotating body 5 to rotate relative to the upper sub 1.

[0047] Specifically, this embodiment discloses a rotary tool for well flushing, which includes three parts: an upper sub 1, a rotating body 5, and a guide shoe 7. Among them, the upper sub 1 is connected to the upper drill string, while the rotating body 5 and the guide shoe 7 are connected and rotate synchronously under the drive of the internal impeller 6. In this embodiment, the rotating body 5 and the guide shoe 7 of the tool rotate synchronously relative to the upper sub 1 and the upper drill string. The upper sub 1 and the upper drill string in this embodiment do not rotate, but only the guide shoe 7 and the rotating body 5 rotate. In this way, it is ensured that during the milling process of the guide shoe 7, rotation is achieved only through the liquid flow, without the need for the drill string to rotate.

[0048] Preferably, the inner wall of the upper part of the upper sub 1 in this embodiment has an internal thread of the upper sub 101;

[0049] The upper drill string is threadedly connected to the upper sub 1 through the external thread on its outer wall to the internal thread of the upper sub 101;

[0050] The inner wall of the lower part of the upper sub 1 is machined with multiple ball groove slides 102 at intervals, and balls 3 are installed in the ball groove slides 102;

[0051] The outer wall of the upper part of the rotating body 5 is rotationally connected to the lower part of the upper sub 1 through multiple balls 3.

[0052] Among them, an O-ring 2 is provided at the connection between the rotating body 5 and the upper sub 1 in this embodiment;

[0053] A welding cover 4 is provided outside the ball groove slide 102.

[0054] This embodiment further defines the structure of the upper sub 1 and the connection structure between the upper sub 1 and the upper drill string; the upper part of the upper sub 1 in this embodiment is turned with an internal thread of the upper sub 101, which is threadedly connected to the external thread of the upper drill string, and the inner wall of the lower part of the upper sub 1 is turned with multiple ball groove slides 102, and balls 3 are installed in the ball groove slides 102 to achieve the rotational connection between the upper sub 1 and the rotating body 5. In order to achieve a sealing effect, an O-ring 2 is provided between the upper sub 1 and the rotating body 5 in this embodiment.

[0055] Preferably, the lower part of the rotating body 5 in this embodiment has an external thread of the rotating body;

[0056] The rotating body 5 is threadedly connected to the guide shoe 7 through the external thread of the rotating body, and an O-ring 2 is provided between the guide shoe 7 and the rotating body 5.

[0057] Among them, the inner wall of the upper part of the guide shoe 7 in this embodiment has a first internal thread of the guide shoe 701, and the inner wall of the middle part of the guide shoe 7 has a second internal thread of the guide shoe 702;

[0058] The guide shoe 7 is threadedly connected to the external thread of the rotating body 5 through the first internal thread of the guide shoe 701;

[0059] The impeller 6 is threadedly connected to the second internal thread 702 of the guide shoe 7 of the guide shoe

[0060] In this embodiment, the connection structure between the rotating body 5 and the guide shoe 7 is further defined. The rotating body 5 and the guide shoe 7 in this embodiment rotate synchronously. Therefore, the rotating body 5 and the guide shoe 7 are threadedly connected through corresponding threads, and an O-ring 2 is installed at the seal

[0061] Preferably, the impeller 6 of this embodiment includes:

[0062] An impeller shaft 601; and

[0063] A plurality of blades 602 formed on the outer periphery of the impeller shaft 601;

[0064] The liquid entering the inner cavity of the upper sub 1 can drive the impeller 6 to rotate through the blades 602

[0065] Among them, the guide shoe 7 of this embodiment has a plurality of water eyes 703; the liquid in the tool flows out through the water eyes 703. In addition, in order to be able to guide the liquid, one end of the impeller shaft 601 of this embodiment close to the upper sub 1 has an upper cone 603, and the liquid is diverted to the blades 602 through the upper cone 603

[0066] The tool of this embodiment drives the impeller 6 to rotate through the liquid, thereby driving the guide shoe 7 and the rotating body 5 to rotate synchronously, fully utilizing the self-rotation of the liquid flow, locally and precisely trimming the wellbore wall, destroying the "micro-step" of the wellbore, and effectively improving the open hole cleaning efficiency

[0067] During use, when the drill string is lowered to the designated position, start the pump, keep the pump pressure at 15 MPa to 20 MPa, the flow rate is 0.4 m / s, and the mud displacement is 1.8 m / min to 2.4 m / min; when the liquid flow passes through the inner cavity flow path of the tool to the upper end of the impeller 6, the liquid flow is divided and impacts the blades 602 through the upper cone 603 of the impeller shaft 601, causing the impeller 6 to rotate. The rotation of the impeller 6 drives the connected guide shoe 7 to rotate and mill. The liquid flow flows out along several water eyes 703 on the guide shoe 7, cleaning and cooling the guide shoe 7. The ball 3 between the rotating body 5 and the upper sub 1 is provided to ensure the rotation between the rotating body 5 and the upper sub 1. In this way, it is realized that the guide shoe 7 rotates under the action of the liquid flow while the upper drill string does not rotate, ensuring that only the liquid flow is used for rotation during the milling process without the need for the drill string to rotate, reducing the contact between the drill string collar and the wellbore wall, and reducing the accident rate

[0068] In the above technical solution, a rotating tool for open hole cleaning provided by the present utility model has the following beneficial effects:

[0069] The rotary tool of the present utility model combines the working principle of a screw. Through hydraulic calculation, an impeller 6 is designed inside. The impeller 6 rotates driven by a liquid to drive the guide shoe 7 and the rotating body 5 to rotate, while the upper sub 1 and the upper drill string remain stationary, enabling local precise trimming of the wellbore, destroying the "micro-steps" in the wellbore, and effectively improving the well flushing efficiency.

[0070] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A rotary tool for well cleaning, characterized in that: The rotary tool includes: An upper joint (1), the upper part of which is connected to an upper drilling tool; a rotating body (5) connected to the lower part of the upper joint (1), the rotating body (5) and the upper joint (1) being rotatably connected; and A guide shoe (7) connected to the lower part of the rotating body (5); The inner cavity of the rotating body (5) is provided with an impeller (6), and the lower part of the impeller (6) is connected to the guide shoe (7); The liquid entering the inner cavity of the upper joint (1) is used to drive the impeller (6) to rotate, and the impeller (6) drives the guide shoe (7) and the rotating body (5) to rotate relative to the upper joint (1).

2. The well cleaning rotary tool according to claim 1, characterized in that: The inner wall of the upper part of the upper joint (1) has an upper joint internal thread (101); The upper drilling tool is threadably connected to the upper joint internal thread (101) through the external thread of its outer wall and the upper joint (1); The inner wall of the lower part of the upper joint (1) is processed with a plurality of ball groove slideways (102) at intervals, and the ball groove slideways (102) are embedded with balls (3); The outer wall of the upper part of the rotating body (5) is rotatably connected to the lower part of the upper joint (1) via a plurality of the balls (3).

3. The well cleaning rotary tool according to claim 2, characterized in that: An O-ring (2) is provided at the connection between the rotating body (5) and the upper joint (1); A welding cover (4) is arranged outside the ball groove slideway (102).

4. The well cleaning rotary tool according to claim 2, characterized in that: The lower part of the rotating body (5) has a rotating body external thread; The rotating body (5) is threadedly connected to the guide shoe (7) via the external thread of the rotating body, and an O-ring (2) is provided between the guide shoe (7) and the rotating body (5).

5. The well cleaning rotary tool according to claim 4, characterized in that: The inner wall of the upper part of the guide shoe (7) has a first inner thread (701) of the guide shoe, and the inner wall of the middle part of the guide shoe (7) has a second inner thread (702) of the guide shoe; The guide shoe (7) is threadedly connected to the rotating body (5) external thread of the rotating body through the first internal thread (701) of the guide shoe; The impeller (6) is threadedly connected to the second internal thread (702) of the guide shoe (7).

6. The well cleaning rotary tool according to claim 5, characterized in that: The impeller (6) comprises: an impeller shaft (601); and A plurality of blades (602) formed on the outer periphery of the impeller shaft (601); The liquid entering the inner cavity of the upper joint (1) can drive the impeller (6) to rotate through the blades (602).

7. The well cleaning rotary tool according to claim 6, characterized in that: The guide shoe (7) has a plurality of water holes (703); The liquid in the tool flows out through the water hole (703).

8. The well cleaning rotary tool according to claim 6, characterized in that: The impeller shaft (601) has an upper cone (603) at one end close to the upper joint (1), and liquid is guided to the blades (602) through the upper cone (603).

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