Special connecting wall protection pipe for penetration-proof thick-wall deep well

Abstract

The utility model belongs to the technical field of wall protecting pipes, and particularly relates to a special connecting wall protecting pipe for a special anti-penetrating thick-wall deep well, which comprises a pipe, a pipe step and an inner wall lantern ring, one end of the pipe is pushed outwards through a die and expanded outwards to form the pipe step, and the pipe step is matched with a pipe body of the pipe in a matched mode. A step-shaped gap for embedding the inner wall lantern ring in a matched manner is formed between the pipe step and the end part of the pipe inserted into the pipe step, and the pipe, the pipe step and the inner wall of the inner wall lantern ring are connected to form a smooth curved surface. After the two pipes are connected in an inserted mode through the pipe steps, the inner wall lantern ring embedded between the two pipes enables the inner walls of the two pipes to be connected to form a smooth and continuous curved surface, and therefore the situation that the pump is scraped or the safety of the pipes is affected when the pump is put down and taken out is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of protective pipe technology, specifically relating to a special connecting protective pipe for deep wells with thick walls that is particularly resistant to penetration. Background Technology

[0002] In deep well drilling and groundwater extraction, the use of casing pipes is crucial. Casing pipes not only fulfill the basic functions of protecting the wellbore and preventing collapse, but also ensure the smooth progress of drilling operations and the effective extraction of subsequent resources. During the installation and connection of casing pipes, a common method is to connect two pipes by plugging them together. This connection method has advantages such as simple construction and ease of operation, but in practical applications, a series of problems urgently need to be solved.

[0003] Specifically, when two pipes are connected by a plug-in joint, the end of one pipe is usually pushed outward through a mold to form a flared section, which is used to fit over the body of the other pipe. This design increases the contact area between the pipes to some extent, improving the stability of the connection. However, due to the presence of the flared section, when the two pipes are plugged in, a discontinuous gap will inevitably form at the step (i.e., the transition part between the flared section and the pipe body).

[0004] This fault fracture presents numerous inconveniences and safety hazards in deep well operations. Firstly, during pump lowering, the pump body slides down the inner wall of the pipeline. When the pump body passes through the fault fracture, it can easily become stuck due to the fracture, hindering the lowering process and sometimes requiring work to be interrupted for troubleshooting. This not only increases the difficulty of construction but also prolongs the operation cycle and reduces work efficiency.

[0005] Secondly, when the pump body is lifted after completing its pumping task, the presence of fault gaps may cause significant friction between the pump body and the pipeline during the ascent. This friction may not only damage the surface coating of the pump body or pipeline, leading to a shortened equipment lifespan, but may also cause serious accidents such as well wall rupture or pipeline detachment due to excessive friction. Utility Model Content

[0006] To address the above problems, the purpose of this utility model is to provide a special connecting and protective pipe for deep wells that is resistant to penetration of thick-walled pipes, thereby solving the problem of fault gaps that exist when two pipes are connected by plugging in the prior art, which adversely affects the efficiency and safety of deep well operations.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a special connecting and protective pipe for thick-walled deep wells, comprising a pipe, a pipe step, and an inner wall collar. One end of the pipe is pushed outward through a mold to form a pipe step. The pipe step is adapted to the pipe body of the pipe. A stepped gap is formed between the pipe step and the end of the pipe inserted in the pipe step, which is adapted to fit the inner wall collar. The inner walls of the pipe, the pipe step, and the inner wall collar are connected to form a smooth curved surface.

[0008] The beneficial effects of this utility model are as follows: after the two pipes are connected by the pipe step, the inner wall collar embedded between the two pipes makes the inner walls of the two pipes connect to form a smooth and continuous curved surface, thereby avoiding scraping the pump or affecting the safety of the pipes when lowering and removing the pump.

[0009] To ensure the installation stability of the inner wall collar in the pipe step;

[0010] As a further improvement to the above technical solution: the outer side of the inner wall collar is formed to fit the inner wall of the tube step.

[0011] The beneficial effects of this improvement are: the mating surface is completely in contact with the inner wall of the pipe step, ensuring that the inner wall collar evenly transmits the force applied by the pipe to the pipe step after being subjected to the pressure of the pipe inserted above, thus ensuring the durability and stability of the inner wall collar.

[0012] To ensure that the inner wall collar can stably support the pipe material;

[0013] As a further improvement to the above technical solution: the contact end face between the inner wall collar and the pipe is formed into a flat support surface that fits the end face of the pipe.

[0014] The beneficial effects of this improvement are: the support surface can be flat to support the pipe, ensuring that the force applied by the pipe is transmitted evenly and stably to the pipe step below.

[0015] In order to effectively ensure that a smooth, continuous curved surface is formed between the inner walls of the two pipes;

[0016] As a further improvement to the above technical solution: the inner wall of the inner wall collar is formed into a transition surface with the same inner diameter as the inner diameter of the pipe.

[0017] The beneficial effects of this improvement are: the smooth connection between the inner walls of the two pipes and the transition surface forms a continuous curved surface, thereby avoiding pump jamming during pump lowering and pump retrieval, and preventing any impact on the safety of the pipes.

[0018] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0019] Figure 1This is a cross-sectional view of the present invention;

[0020] Figure 2 This is a schematic diagram of the pipe structure in this utility model;

[0021] Figure 3 This is a schematic diagram of the inner wall collar in this utility model;

[0022] Figure 4 This is a cross-sectional view of the inner wall collar in this utility model;

[0023] In the diagram: 1. Pipe; 2. Pipe step; 3. Inner wall collar; 31. Fitting surface; 32. Supporting surface; 33. Transition surface. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0025] Example 1:

[0026] like Figure 1 As shown in Figure 4: A special connecting and protective pipe for thick-walled deep wells, comprising a pipe 1, a pipe step 2, and an inner wall collar 3. One end of the pipe 1 is pushed outward through a mold to form the pipe step 2. The pipe step 2 is adapted to fit the pipe body of the pipe 1. A stepped gap is formed between the pipe step 2 and the end of the pipe 1 inserted into the pipe step 2, which is adapted to fit the inner wall collar 3. The inner walls of the pipe 1, the pipe step 2, and the inner wall collar 3 are connected to form a smooth curved surface. After two pipes 1 are inserted through the pipe step 2, the inner wall collar 3 embedded between the two pipes 1 connects the inner walls of the two pipes 1 to form a smooth and continuous curved surface, thereby avoiding pump scraping or affecting the safety of the pipe 1 when pumping down and up. The outer surface of the inner wall collar 3 is formed to fit and conform to the pipe platform. The inner wall of step 2 has a contact surface 31 that completely fits the inner wall of the pipe step 2. This ensures that the inner wall collar 3, after being subjected to the pressure of the pipe 1 inserted above, evenly transmits the force applied by the pipe 1 to the pipe step 2, thus ensuring the durability and stability of the inner wall collar 3. The contact end face of the inner wall collar 3 and the pipe 1 is formed into a flat support surface 32 that fits the end face of the pipe 1. The support surface 32 can flatly support the pipe 1, ensuring that the force applied by the pipe 1 is evenly and stably transmitted to the lower pipe step 2. The inner wall of the inner wall collar 3 is formed into a transition surface 33 with the same inner diameter as the pipe 1. The smooth connection between the inner walls of the two pipes 1 and the transition surface 33 forms a continuous curved surface, thereby avoiding pump scraping and jamming during pump lowering and pump retrieval, and preventing any impact on the safety of the pipe 1.

[0027] The working principle of this technical solution is as follows: The inner wall collar 3 is nested into the lower pipe 1, so that the contact surface 31 is in contact with the inner wall of the pipe step 2. At this time, the surface where the support surface 32 is located is perpendicular to the axis of the pipe 1. Then, the pipe body of the upper pipe 1 is inserted into the pipe body of the lower pipe 1 after it has been expanded and formed by the pipe step 2, so that the pipe end face of the upper pipe 1 is flatly in contact with the support surface 32. At this time, the inner walls of the two pipes 1 are smoothly connected with the transition surface 33 to form a curved surface, thereby avoiding pump scraping and jamming when pumping down and pumping up, and avoiding affecting the safety of the pipe 1.

[0028] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A special connecting and protective pipe for thick-walled deep wells with special anti-penetration properties, characterized in that: The tube (1), the tube step (2), and the inner wall collar (3) are included. One end of the tube (1) is pushed outward by a mold to form the tube step (2). The tube step (2) is adapted to fit the tube body of the tube (1). A stepped gap is formed between the tube step (2) and the end of the tube (1) inserted in the tube step (2) to fit the inner wall collar (3). The inner walls of the tube (1), the tube step (2), and the inner wall collar (3) are connected to form a smooth curved surface.

2. The special connecting and protective pipe for thick-walled deep wells with special anti-penetration properties according to claim 1, characterized in that: The outer side of the inner wall collar (3) is formed to fit the inner wall of the tube step (2) with a fitting surface (31).

3. The special connecting and protective pipe for thick-walled deep wells with special anti-penetration properties according to claim 1, characterized in that: The contact end face of the inner wall collar (3) and the pipe (1) is formed into a flat support surface (32) that fits the end face of the pipe (1).

4. The special connecting and protective pipe for thick-walled deep wells with special anti-penetration properties according to claim 1, characterized in that: The inner wall of the inner wall collar (3) is formed into a transition surface (33) with the same inner diameter as the inner diameter of the pipe (1).

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