Variable-diameter flared tube constant flow velocity compensation device

Abstract

The utility model discloses a variable-diameter flared tube constant flow velocity compensation device. The body is cylindrical, and an axial first through hole is formed in the body; the circular truncated cone body is arranged at the lower end of the body, and the outer diameter of the circular truncated cone body is sequentially reduced from top to bottom; the periphery of the circular truncated cone body is matched with the inner periphery of the variable-diameter horn tube in the middle of the variable-diameter horn tube; an axial second through hole is formed in the circular truncated cone; the periphery is arranged at the upper end of the body, the periphery of the periphery is matched with the inner periphery of a large-diameter flared tube on the upper portion of the variable-diameter flared tube, and an axial third through hole is formed in the periphery; the first through hole, the second through hole and the third through hole are coaxially arranged; the inner diameter of the first through hole, the inner diameter of the second through hole and the inner diameter of the third through hole are equal to the inner diameter of a small-diameter horn tube on the lower portion of the variable-diameter horn tube. The utility model has the beneficial effects that the inner diameter of the circulating channel at the large-diameter horn tube and the variable-diameter horn tube can be the same as the inner diameter of the small-diameter horn tube, the flow velocity of fluid is kept the same, and rock debris accumulation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical technology, and in particular to a flow velocity compensation device for a variable diameter trumpet tube, etc. Background Technology

[0002] In drilling operations, the variable diameter bell-shaped tube connects the rotary table and overhead duct at the top and the blowout preventer (BOP) assembly at the bottom, playing a crucial role in establishing circulation channels and guiding the drill string. The variable diameter bell-shaped tube consists of a large-diameter bell-shaped tube, a variable-diameter bell-shaped tube, and a small-diameter bell-shaped tube connected sequentially from top to bottom. The diameter of the variable-diameter bell-shaped tube decreases sequentially from top to bottom. The diameter of the upper end of the variable-diameter bell-shaped tube is equal to the diameter of the large-diameter bell-shaped tube; the diameter of the lower end of the variable-diameter bell-shaped tube is equal to the diameter of the small-diameter bell-shaped tube. However, due to its inherent structural limitations, the large-diameter and small-diameter bell-shaped pipes of the variable-diameter bell-shaped pipe have significantly different inner diameters. This results in the drilling fluid carrying cuttings flowing through the large-diameter bell-shaped pipe having a much lower flow velocity than the small-diameter bell-shaped pipe. When the drilling fluid reaches the large-diameter bell-shaped pipe, the flow velocity suddenly slows down, the cuttings-carrying capacity decreases rapidly, and the cuttings cannot be returned to the return outlet in time, thus accumulating continuously in the large-diameter bell-shaped pipe. In severe cases, this can lead to complex situations such as lost circulation and stuck pipe, posing a great risk to the safe implementation of drilling operations.

[0003] Therefore, a flow velocity compensation device such as a variable diameter horn tube becomes the key to solving the problem. Utility Model Content

[0004] The purpose of this utility model is to provide a flow velocity compensation device for variable diameter trumpet tubes, which has a periphery, a body and a frustum, and can be lowered into the large-diameter trumpet tube and the variable-diameter trumpet tube, so that the inner diameter of the flow channel in the large-diameter trumpet tube and the variable-diameter trumpet tube is the same as the inner diameter of the small-diameter trumpet tube, so as to maintain the same fluid flow velocity and avoid rock debris accumulation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, including:

[0006] The main body is cylindrical and has an axial first through hole inside;

[0007] A frustum is disposed at the lower end of the main body, and the outer diameter of the frustum decreases from top to bottom; the outer circumference of the frustum is adapted to the inner circumference of the variable diameter horn tube in the middle of the variable diameter horn tube; an axial second through hole is provided on the frustum;

[0008] The periphery is located at the upper end of the body. The outer periphery of the periphery is adapted to the inner periphery of the large-diameter horn tube at the upper part of the variable-diameter horn tube. An axial third through hole is provided on the periphery.

[0009] The first through hole, the second through hole, and the third through hole are coaxially arranged; the inner diameter of the first through hole, the second through hole, and the third through hole is equal to the inner diameter of the small diameter horn tube at the bottom of the variable diameter horn tube.

[0010] Preferably, it also includes:

[0011] Two first sealing ring grooves are respectively arranged parallel to each other on the outer periphery of the frustum;

[0012] The first sealing ring is provided in the first sealing ring groove to improve the sealing performance between the frustum and the variable diameter horn tube.

[0013] Preferably, it also includes:

[0014] The second sealing ring groove is disposed on the outer periphery of the periphery;

[0015] The second sealing ring is provided in the second sealing ring groove to improve the sealing performance between the periphery and the large-diameter horn tube.

[0016] Preferably, it also includes:

[0017] A pair of lifting and filling holes are respectively disposed through the perimeter and located on both sides of the third through hole; used for installing detachable lifting lugs or filling liquid through the lifting and filling holes to check the sealing performance.

[0018] Preferably, the body, the frustum, and the periphery are made of metal, the body and the periphery are integrally formed, and the body and the frustum are welded together.

[0019] Preferably, the first and second sealing rings are made of rubber material.

[0020] The beneficial effects of this utility model are: it can be inserted into the large-diameter and variable-diameter horn tubes of the variable-diameter horn tube, so that the inner diameter of the flow channel in the large-diameter and variable-diameter horn tubes is the same as that in the small-diameter horn tube, thus maintaining the same fluid flow rate and avoiding the accumulation of rock debris. Attached Figure Description

[0021] Figure 1 This is a perspective view of a flow velocity compensation device for a variable diameter trumpet tube according to this utility model.

[0022] Figure 2 This is a schematic diagram of the working process of a flow velocity compensation device for a variable diameter trumpet tube according to this utility model. Detailed Implementation

[0023] The utility model will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0024] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0025] like Figure 1-2 As shown, the present invention provides a variable diameter trumpet tube constant velocity compensation device 1, comprising:

[0026] The body 110 is cylindrical and has an axial first through hole inside. A frustum 120 is disposed at the lower end of the body 110, and the outer diameter of the frustum 120 decreases from top to bottom. The outer circumference of the frustum 120 is adapted to the inner circumference of the variable diameter horn tube 220 in the middle of the variable diameter horn tube 2. An axial second through hole is provided on the frustum 120. A periphery 130 is disposed at the upper end of the body 110, and the outer circumference of the periphery 130 is adapted to the inner circumference of the large diameter horn tube 210 at the upper part of the variable diameter horn tube 2. An axial third through hole is provided on the periphery 130. The first, second, and third through holes are coaxially arranged. The inner diameters of the first, second, and third through holes are equal to the inner diameter of the small diameter horn tube 230 at the lower part of the variable diameter horn tube 2.

[0027] During use, the flow velocity compensation device 1, such as the variable diameter trumpet tube, is inserted into the variable diameter trumpet tube 2. The outer periphery 130 of the flow velocity compensation device 1 is adapted to the inner periphery of the large-diameter trumpet tube 210 at the top of the variable diameter trumpet tube 2; the outer periphery of the frustum 120 is adapted to the inner periphery of the variable-diameter trumpet tube 220 in the middle of the variable diameter trumpet tube 2; the inner diameters of the first through hole, the second through hole, and the third through hole are equal to the inner diameter of the small-diameter trumpet tube 230 at the bottom of the variable diameter trumpet tube 2; the flow velocity compensation device 1 makes the inner diameter of the flow channel at the large-diameter trumpet tube 210 and the variable-diameter trumpet tube 220 the same as the inner diameter of the small-diameter trumpet tube 230, so that the fluid maintains the same flow velocity and can avoid the accumulation of rock debris.

[0028] In another embodiment, it further includes: two first sealing ring grooves, which are respectively arranged parallel to each other on the outer periphery of the frustum 120; wherein, a first sealing ring 121 is provided in the first sealing ring groove to improve the sealing performance between the frustum 120 and the variable diameter horn tube 220.

[0029] In another embodiment, it further includes: a second sealing ring groove, which is disposed on the outer periphery of the periphery 130; wherein, a second sealing ring 131 for improving the sealing performance between the periphery 130 and the large-diameter horn tube 210 is provided in the second sealing ring groove.

[0030] In another embodiment, it further includes: a pair of lifting and filling holes 132, which are respectively disposed through the periphery 130 and located on both sides of the third through hole; for installing detachable lifting lugs or filling liquid through the lifting and filling holes to check the sealing performance.

[0031] In another embodiment, the body 110, the frustum 120, and the periphery 130 are made of metal material, the body 110 and the periphery 130 are integrally formed, and the body 110 and the frustum 120 are welded together.

[0032] In another embodiment, the first sealing ring 121 and the second sealing ring 131 are made of rubber material.

[0033] In summary, the present invention provides a variable diameter trumpet tube equal flow velocity compensation device 1, which can be inserted into the large diameter trumpet tube 210 and the variable diameter trumpet tube 220 of the variable diameter trumpet tube 2, so that the inner diameter of the flow channel at the large diameter trumpet tube 210 and the variable diameter trumpet tube 220 is the same as the inner diameter of the small diameter trumpet tube 230, thereby maintaining the same fluid flow velocity and avoiding the accumulation of rock debris.

[0034] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A flow velocity compensation device for a variable diameter trumpet tube, characterized in that, include: The main body is cylindrical and has an axial first through hole inside; A frustum is disposed at the lower end of the main body, and the outer diameter of the frustum decreases from top to bottom; the outer circumference of the frustum is adapted to the inner circumference of the variable diameter horn tube in the middle of the variable diameter horn tube; an axial second through hole is provided on the frustum; The periphery is located at the upper end of the body. The outer periphery of the periphery is adapted to the inner periphery of the large-diameter horn tube at the upper part of the variable-diameter horn tube. An axial third through hole is provided on the periphery. The first through hole, the second through hole, and the third through hole are coaxially arranged; the inner diameter of the first through hole, the second through hole, and the third through hole is equal to the inner diameter of the small diameter horn tube at the bottom of the variable diameter horn tube.

2. The variable diameter trumpet tube constant velocity compensation device according to claim 1, characterized in that, Also includes: Two first sealing ring grooves are respectively arranged parallel to each other on the outer periphery of the frustum; The first sealing ring is provided in the first sealing ring groove to improve the sealing performance between the frustum and the variable diameter horn tube.

3. The variable diameter trumpet tube constant velocity compensation device according to claim 2, characterized in that, Also includes: The second sealing ring groove is disposed on the outer periphery of the periphery; The second sealing ring is provided in the second sealing ring groove to improve the sealing performance between the periphery and the large-diameter horn tube.

4. The variable diameter trumpet tube constant velocity compensation device according to claim 3, characterized in that, Also includes: A pair of lifting and filling holes are respectively disposed through the perimeter and located on both sides of the third through hole; used for installing detachable lifting lugs or filling liquid through the lifting and filling holes to check the sealing performance.

5. The flow velocity compensation device for a variable diameter trumpet tube according to claim 1 or 2, characterized in that: The body, the frustum, and the periphery are made of metal. The body and the periphery are integrally formed, and the body and the frustum are welded together.

6. The variable diameter trumpet tube equal flow velocity compensation device according to claim 3, characterized in that: The first and second sealing rings are made of rubber material.

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