Stepped shaft overflow pipe structure for underground treatment
By designing a stepped shaft overflow pipe structure for downhole processing, the problem of needing to replace the entire overflow pipe after wear was solved, achieving the effects of low replacement cost and high versatility.
Patent Information
- Application Number
- CN202422723715.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The overflow pipe of existing downhole hydrocyclones needs to be replaced as a whole when it wears out, which leads to material waste and poor versatility.
A stepped shaft overflow pipe structure for downhole processing was designed, including a base, a base pipe, a collar assembly, and an adjusting ring. By adding, removing, and replacing the adjusting ring, it can adapt to different hydrocyclone sizes, and when worn, only the adjusting ring needs to be replaced instead of the entire overflow pipe.
It improves the versatility and material utilization of the overflow pipe, reduces replacement costs, and extends its service life.
Smart Images
Figure CN223839057U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of overflow pipe technology, specifically a stepped shaft overflow pipe structure for downhole processing. Background Technology
[0002] In drilling operations, as well depth increases, solid heavy components (such as barite) need to be added to the drilling fluid to maintain wellbore stability. This leads to an increase in drilling fluid density, which in turn reduces the rate of penetration (ROP) and shortens the lifespan of the drill bit. Therefore, to improve the working environment of the drill bit, increase the ROP, and shorten the well construction cycle, a hydrocyclone is needed to separate the solid phases of the drilling fluid before it passes through the drill bit.
[0003] In order to improve the classification accuracy of hydrocyclones and reduce short-circuit flow without reducing separation efficiency, a type of hydrocyclone with a stepped axial overflow pipe has gradually appeared on the market in recent years, in which the overflow pipe is arranged in a stepped shape.
[0004] During use, the end of the overflow pipe will be in direct contact with the drilling fluid. Over time, some parts are prone to wear. When the overflow pipe is worn excessively, since most overflow pipes are integrally formed, the entire pipe needs to be replaced, which undoubtedly leads to a certain degree of waste of components and materials.
[0005] Meanwhile, since the overflow pipe has a fixed size, it inevitably suffers from poor versatility. When used with a hydrocyclone, its size must be customized in advance, which is time-consuming and labor-intensive. Utility Model Content
[0006] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.
[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:
[0008] A stepped shaft overflow pipe structure for downhole processing includes a base, a base pipe fixedly connected to the center of the base, a collar assembly sleeved on the outer wall of the base pipe, and a sealing ring threadedly connected to the end of the base pipe away from the base.
[0009] The collar assembly includes a bottom collar and a top collar, with a central collar provided between the bottom collar and the top collar. Adjustment rings are provided on the outer walls of the bottom collar, the central collar, and the top collar.
[0010] As a preferred embodiment of the stepped shaft overflow pipe structure for downhole treatment described in this utility model, the bottom end of the sealing ring is tapered, which facilitates the acceptance of water flow impact and prevents loosening between the sealing ring and the foundation pipe.
[0011] As a preferred embodiment of the stepped axial overflow pipe structure for downhole treatment described in this utility model, the outer diameters of the bottom ring, the center ring, and the top ring decrease sequentially. The stepped overflow pipe arrangement can effectively reduce the probability of short-circuit flow entering the overflow pipe.
[0012] As a preferred embodiment of the stepped shaft overflow pipe structure for downhole processing described in this utility model, the adjusting ring is provided in several parts, and the two adjacent adjusting rings are threadedly connected. Adding or removing adjusting rings makes it easy to adjust the size of the adjusting ring assembly according to the size of the external cyclone separator. At the same time, when the outer adjusting ring is excessively worn, the outer adjusting ring can be directly disassembled and replaced without replacing the entire overflow pipe.
[0013] As a preferred embodiment of the stepped shaft overflow pipe structure for downhole treatment described in this utility model, each of the adjusting rings has a force-bearing slope at its end, which facilitates better acceptance of water flow impact and force relief, making the adjusting rings less prone to loosening.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] This invention utilizes the cooperation between the base, the foundation pipe, the collar assembly, and the adjusting ring. Depending on the size of the external cyclone separator, the number of adjusting rings can be increased or decreased outside the collar assembly, thereby adjusting the outer diameter of different stepped collars. This makes the overflow pipe more versatile. Furthermore, when severe wear occurs on the outside of the overflow pipe, only the external adjusting ring needs to be disassembled and replaced, without having to replace the entire overflow pipe, thus saving materials. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0017] Figure 1 This is a perspective view of a stepped shaft overflow pipe structure for downhole processing according to the present invention;
[0018] Figure 2 This is a schematic cross-sectional view of a stepped shaft overflow pipe structure for downhole treatment according to the present invention.
[0019] Figure 3 This is a schematic diagram of the collar assembly structure of a stepped shaft overflow pipe structure for downhole processing according to this utility model.
[0020] Legend: 1. Base; 2. Foundation pipe; 3. Collar assembly; 301. Bottom collar; 302. Top collar; 303. Center collar; 4. Sealing ring; 5. Adjusting ring; 501. Load-bearing slope. Detailed Implementation
[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0024] Please see Figure 1-3 This utility model provides a stepped shaft overflow pipe structure for downhole processing, including a base 1, a base pipe 2 fixedly connected at the center of the base 1, and a collar assembly 3 sleeved on the outer wall of the base pipe 2.
[0025] The collar assembly 3 includes a bottom collar 301 and a top collar 302, with a central collar 303 provided between the bottom collar 301 and the top collar 302.
[0026] In this embodiment, the outer diameters of the bottom collar 301, the center collar 303, and the top collar 302 decrease sequentially, and the stepped overflow pipe arrangement can effectively reduce the probability of short-circuit flow entering the overflow pipe.
[0027] Adjusting rings 5 are provided on the outer walls of the bottom ring 301, the center ring 303 and the top ring 302. Several adjusting rings 5 are provided, and adjacent adjusting rings 5 are threadedly connected. Adding or removing adjusting rings 5 can be done to adjust the size of the ring assembly 3 according to the size of the external hydrocyclone. At the same time, when the outer adjusting ring 5 is excessively worn, the outer adjusting ring 5 can be directly disassembled and replaced without replacing the entire overflow pipe.
[0028] In this embodiment, each of the several adjusting rings 5 has a force-bearing ramp 501 at its end, which facilitates better acceptance of water flow impact and force relief, making the adjusting rings 5 less prone to loosening.
[0029] The end of the base pipe 2 away from the base 1 is threaded with a sealing ring 4. The bottom end of the sealing ring 4 is tapered to facilitate the impact of water flow and to prevent it from loosening from the base pipe 2.
[0030] In use, the bottom collar 301, the center collar 303 and the top collar 302 are sequentially fitted and slidably installed on the outer wall of the base pipe 2, and then the sealing ring 4 is screwed onto the end of the base pipe 2 to limit and fix the collar assembly 3.
[0031] Depending on the specific size of the hydrocyclone, an adjusting ring 5 can be threadedly connected to the outside of the bottom ring 301, the center ring 303, and the top ring 302. The outermost adjusting ring 5 will not have external threads on its outer wall to ensure that the outer wall of the overflow pipe is smooth.
[0032] When wear appears on the outside of the overflow pipe, the adjusting ring 5 at the corresponding worn part can be removed and replaced, without replacing the entire overflow pipe.
[0033] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A stepped shaft overflow pipe structure for downhole processing, comprising a base (1), characterized in that, A base pipe (2) is fixedly connected to the center of the base (1), and a collar assembly (3) is sleeved on the outer wall of the base pipe (2). A sealing ring (4) is threaded to the end of the base pipe (2) away from the base (1). The collar assembly (3) includes a bottom collar (301) and a top collar (302). A central collar (303) is provided between the bottom collar (301) and the top collar (302). Adjustment rings (5) are provided on the outer walls of the bottom collar (301), the central collar (303) and the top collar (302).
2. The stepped shaft overflow pipe structure for downhole processing according to claim 1, characterized in that, The bottom end of the sealing ring (4) is cone-shaped.
3. The stepped shaft overflow pipe structure for downhole processing according to claim 1, characterized in that, The outer diameters of the bottom collar (301), the center collar (303), and the top collar (302) decrease sequentially.
4. The stepped shaft overflow pipe structure for downhole processing according to claim 1, characterized in that, The adjusting ring (5) is provided in several parts, and two adjacent adjusting rings (5) are threadedly connected.
5. The stepped shaft overflow pipe structure for downhole processing according to claim 1, characterized in that, Each of the adjusting rings (5) has a force-bearing ramp (501) at its end.