A geothermal well opening fast casing cementing flow guide pipe back connection tool

Abstract

The utility model provides a kind of geothermal well one opening fast sending casing well cementation flow guide pipe back connection tool, it is mainly related to geothermal well pipe joint technical field.A kind of geothermal well one opening fast sending casing well cementation flow guide pipe back connection tool, including pipe joint and the connecting pipe of being sleeved in its inside, it is characterized in that: the upper end of the pipe joint integrally fixed installation has first connecting flange, the second connecting flange that is cooperated with first connecting flange is equipped on the connecting pipe, first connecting flange and second connecting flange are connected by several bolts.Two advantages of the utility model are: the device adopts the way that flange connection and thread connection are combined, and the stable connection of casing and well cementation flow guide pipe in the construction process of geothermal well one opening is realized by pipe joint and connecting pipe, and the installation process is simple, and subsequent construction is facilitated.

Description

Technical Field

[0001] This utility model mainly relates to the field of geothermal well pipe joint technology, specifically a tool for quickly sending casing and cementing guide pipe back when a geothermal well is opened. Background Technology

[0002] Geothermal resources, as a clean and renewable energy source, have attracted widespread attention for their exploitation and utilization. The drilling and development of geothermal wells are key links in the utilization of geothermal resources. In this process, operations such as casing transportation, cementing, and diversion pipe connection in the initial stage directly affect the construction quality and extraction efficiency of geothermal wells.

[0003] In traditional geothermal well operations, casing delivery in the initial stage is usually connected to the drill pipe by welding. This method is not only cumbersome to install, requiring professional welding equipment and technicians, and consuming a lot of time and labor costs, but the welding quality is also greatly affected by environmental and human factors, with risks such as weak welds and easy cracking, which in turn affect the efficiency and safety of casing delivery. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tool for quickly sending casing and cementing guide pipe back during the initial opening of a geothermal well, achieved through the following technical solution:

[0005] A tool for quickly sending casing and cementing guide pipe back to a geothermal well upon opening includes a pipe joint and a connecting pipe sleeved inside it. The tool is characterized in that: a first connecting flange is integrally fixedly installed on the upper end of the pipe joint, and a second connecting flange that mates with the first connecting flange is provided on the connecting pipe. The first connecting flange and the second connecting flange are fastened together by several bolts.

[0006] Furthermore, the bottom of the outer periphery of the pipe joint is provided with a first external thread.

[0007] Furthermore, the upper part of the inner wall of the connecting pipe is provided with an internal thread, and the lower part of the outer periphery of the connecting pipe is provided with a second external thread.

[0008] Furthermore, the lower end of the connecting pipe is flush with the lower end of the pipe fitting.

[0009] Furthermore, the inner side of the upper end of the connecting pipe is chamfered inward.

[0010] Compared with the existing technology, the beneficial effects of this utility model are:

[0011] This device uses a combination of flange and threaded connections to achieve a stable connection between the casing and cementing guide pipe during the initial construction of a geothermal well through pipe joints and connecting pipes. The installation process is simple and facilitates subsequent construction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the bottom structure of the pipe connector of this utility model;

[0014] Figure 3 This is the front view of this utility model;

[0015] Figure 4 This is a cross-sectional structural schematic diagram of the present invention;

[0016] Figure 5 This is an exploded structural diagram of the present invention.

[0017] The reference numerals in the attached diagram are: 10, pipe fitting; 101, first connecting flange; 20, connecting pipe; 201, second connecting flange. Detailed Implementation

[0018] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0019] Example 1: A tool for rapid casing delivery and cementing guide pipe reconnection in geothermal wells during initial opening

[0020] like Figure 1-5 As shown, the geothermal well opening rapid casing insertion and cementing guide pipe reconnection tool of this embodiment is mainly used in the opening operation of geothermal wells to realize rapid casing insertion and cementing guide pipe reconnection, thereby improving construction efficiency and ensuring construction quality. The tool mainly consists of a pipe joint 10 and a connecting pipe 20 sleeved inside it. Through a specific connection structure and thread design, reliable connection between the various parts of the tool is achieved.

[0021] The pipe joint 10 is a cylindrical structure with a certain wall thickness and length, made of high-strength alloy steel to meet the requirements of bearing large pressure and complex working conditions during geothermal well operation; the upper end of the pipe joint 10 is integrally fixedly installed with a first connecting flange 101, which is an annular structure with several through holes evenly distributed on it, for fastening to the second connecting flange 201 on the connecting pipe 20 by bolts.

[0022] Furthermore, the bottom of the outer periphery of the pipe joint 10 is provided with a first external thread. This first external thread adopts a standard pipe thread specification and is used for threaded connection with other casings or equipment in the geothermal well, realizing reliable docking between this device and the downhole system. During the connection process, by rotating the pipe joint 10, its first external thread is tightly engaged with the internal thread of the corresponding downhole component, forming a good connection effect.

[0023] Example 2: A tool for rapid casing delivery and cementing guide pipe reconnection in geothermal wells during initial opening.

[0024] Based on Embodiment 1, the connecting pipe 20 is also a cylindrical structure, fitted inside the pipe joint 10. The connecting pipe 20 is made of the same or compatible high-strength alloy steel material as the pipe joint 10 to ensure the structural strength and stability of the entire tool.

[0025] The connecting pipe 20 is provided with a second connecting flange 201 that mates with the first connecting flange 101. The second connecting flange 201 is also annular, and similarly has evenly distributed through holes corresponding to the through holes of the first connecting flange 101. During installation, the first connecting flange 101 and the second connecting flange 201 are aligned, and then several bolts are passed through the corresponding through holes and nuts are tightened to achieve a secure connection between the pipe fitting 10 and the connecting pipe 20. This flange connection method is not only reliable but also facilitates disassembly and maintenance.

[0026] The connecting pipe 20 has an internal thread on its upper inner wall. This internal thread is used for threaded connection with the guide pipe or other pipe fittings that need to be connected, enabling quick reconnection of the guide pipe. The specifications of the internal thread are designed according to actual operational requirements to ensure good thread matching with the corresponding pipe fittings and a tight connection.

[0027] The lower part of the outer circumference of the connecting pipe 20 is provided with a second external thread. This is used for threaded connection with the guide pipe in the geothermal well, so as to achieve reliable docking between this device and the downhole system. During the connection process, by rotating the pipe joint 10, its first external thread is made to fit tightly with the internal thread of the downhole guide pipe, forming a good connection effect.

[0028] Example 3: A tool for rapid casing delivery and cementing guide pipe reconnection during the initial opening of a geothermal well

[0029] Based on Embodiment 2, the lower end of the connecting pipe 20 is flush with the lower end of the pipe fitting 10. This design ensures that the lower end face of the tool is flat after installation downhole, allowing for good contact with downhole equipment or formation, avoiding problems such as poor sealing or uneven stress caused by uneven lower ends. Furthermore, the inner side of the upper end of the connecting pipe 20 forms a chamfer. This chamfer design facilitates the smooth insertion of the guide pipe or other fittings into the connecting pipe 20, reducing resistance during insertion. On the other hand, the chamfer can also play a guiding and positioning role, enabling fittings to be accurately aligned with the internal thread of the connecting pipe 20, thus improving installation efficiency.

[0030] The working principle described above is as follows:

[0031] During installation, firstly, connect the pipe fitting 10 to the corresponding casing or equipment in the geothermal well via the first external thread at its bottom, ensuring a tight and leak-free connection. Then, insert the connecting pipe 20 into the pipe fitting 10, aligning the first connecting flange 101 with the second connecting flange 201. Next, use several bolts to pass through the through holes on the first connecting flange 101 and the second connecting flange 201, and tighten the nuts to securely connect the pipe fitting 10 and the connecting pipe 20 together. Finally, according to actual operational requirements, connect the guide pipe or other fittings to the connecting pipe 20 via the internal thread on the upper part of the inner wall of the connecting pipe 20, completing the installation of the entire reconnection tool.

[0032] In explaining this utility model, it should be noted that the terms indicating location are only for ease of description and understanding, and are not intended to limit the installation location of specific technical features. Other possible installation methods are not excluded.

[0033] The serial numbers assigned to components in this document, such as "first," "second," etc., are merely used to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tool for quickly sending casing and cementing guide pipe back into a geothermal well during initial opening, comprising a pipe joint (10) and a connecting pipe (20) sleeved inside it, characterized in that: The upper end of the pipe joint (10) is integrally fixed with a first connecting flange (101), and the connecting pipe (20) is provided with a second connecting flange (201) that cooperates with the first connecting flange (101). The first connecting flange (101) and the second connecting flange (201) are fastened together by several bolts.

2. The tool for quickly sending casing and cementing guide pipe back into a geothermal well upon opening, as described in claim 1, is characterized in that: The bottom of the outer periphery of the pipe fitting (10) is provided with a first external thread.

3. The tool for quickly sending casing and cementing guide pipe back into a geothermal well upon opening, as described in claim 1, is characterized in that: The upper part of the inner wall of the connecting pipe (20) is provided with an internal thread, and the lower part of the outer periphery of the connecting pipe (20) is provided with a second external thread.

4. The tool for quickly sending casing and cementing guide pipe back into a geothermal well upon opening, as described in claim 1, is characterized in that: The lower end of the connecting pipe (20) is flush with the lower end of the pipe fitting (10).

5. The tool for quickly sending casing and cementing guide pipe back into a geothermal well upon opening, as described in claim 1, is characterized in that: The inner side of the upper end of the connecting pipe (20) is chamfered inward.

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