ESUB intermediate joint connecting device and pumping perforating gun

Abstract

The utility model provides an ESUB intermediate joint connecting device and a pumping perforating gun, and belongs to the technical field of oil exploitation. The ESUB intermediate connector solves the problems that when a traditional ESUB intermediate connector is used for connecting and disassembling an ESUB assembly, operation is complex, time and labor are wasted, and the situation that connection is not firm or the assembly is damaged is prone to occurring. The ESUB connector comprises a main body structure, an ESUB assembly, a metal sealing sleeve and a quick insertion and extraction mechanism, the ESUB assembly is installed in the main body structure through the quick insertion and extraction mechanism, the metal sealing sleeve is arranged at the joint of the ESUB assembly and the main body structure, the quick insertion and extraction mechanism comprises an installation pipe and a locking component, the installation pipe is arranged in the main body structure, and the locking component is arranged in the installation pipe. The ESUB assembly is sleeved in the mounting pipe, the outer end of the connecting part of the mounting pipe and the ESUB assembly is fixed through the locking component, and the sealing sleeve is mounted at the gap between the mounting pipe and the ESUB assembly. The connecting device is mainly used for connecting the pumping perforating gun.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil exploitation, in particular to an ESUB intermediate joint connecting device and a pumping perforating gun. Background Art

[0002] In today's oil and gas industry, especially in perforating operations, the ESUB intermediate joint usually refers to the intermediate joint in the Exploding Subsurface Safety Valve. As a key connecting component of the pumping perforating gun, the performance and quality of the ESUB intermediate joint have a vital impact on the smooth progress and effect of the entire perforating operation. With the continuous development of oil extraction technology and the gradual increase in the difficulty of oil and gas resource development, the requirements for pumping perforating guns and their components are also increasing. In the traditional design and manufacturing of the past, there are a series of significant problems and deficiencies in the ESUB intermediate joint of the pumping perforating gun. First of all, in terms of connection stability, due to the unreasonable design and limitations of material selection, the intermediate joint is prone to loosening, displacement or even falling off when it is subjected to the strong impact and vibration during the pumping process. This will not only cause the interruption of the perforating gun and affect the operation efficiency, but also may cause serious safety accidents and threaten downhole equipment and personnel.

[0003] Secondly, sealing performance has always been one of the key issues of intermediate joints. The existing sealing structures of intermediate joints are often unable to effectively cope with complex downhole environments and high-pressure and high-temperature working conditions. The durability of sealing materials is insufficient and they are prone to aging, wear or deformation, which can lead to leakage of liquid or gas. This will not only cause a waste of resources, but may also pollute the downhole environment and affect the production quality and long-term stability of oil and gas wells. Secondly, from the perspective of materials and manufacturing processes, the materials used in the past did not perform well in terms of strength, corrosion resistance and wear resistance. The manufacturing process was relatively rough, and the precision and quality control were not strict enough, resulting in the overall performance of the intermediate joint being unable to meet the increasingly demanding operational requirements. In addition, due to the lack of in-depth understanding of downhole working conditions, the structural design of the intermediate joint failed to fully consider factors such as fluid dynamics and mechanical load distribution, which affected its performance and reliability in practical applications. In addition, the traditional ESUB intermediate joint is complicated, time-consuming and labor-intensive to connect and disassemble ESUB components, and is prone to loose connections or damage to components. Utility Model Content

[0004] In view of this, the utility model aims to provide an ESUB intermediate joint connection device and a pumping perforating gun to solve the problem that the traditional ESUB intermediate joint is complicated to operate, time-consuming and labor-intensive, and prone to loose connection or damage to components when connecting and disassembling ESUB components.

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

[0006] An ESUB intermediate joint connection device comprises a main structure, an ESUB component, a metal sealing sleeve and a quick plug-in mechanism. The ESUB component is installed in the main structure through the quick plug-in mechanism, and a metal sealing sleeve is provided at the connection between the ESUB component and the main structure.

[0007] Furthermore, the quick plug-in mechanism includes a mounting tube and a locking component. The mounting tube is arranged in the main structure, the ESUB component is sleeved in the mounting tube, and the outer end of the connection portion between the mounting tube and the ESUB component is fixed by a locking component.

[0008] Furthermore, a sealing sleeve is installed at the gap between the installation tube and the ESUB component.

[0009] Furthermore, the main structure is made of 35CrMo alloy material.

[0010] Furthermore, the metal sealing sleeve is made of hard alloy material.

[0011] A pumping perforating gun comprises an ESUB intermediate joint connection device.

[0012] Furthermore, the main structure is connected to the pumping perforating gun via threads arranged on the outside.

[0013] Furthermore, an O-ring is provided at the connection between the main structure and the pumping perforating gun.

[0014] Furthermore, the O-type sealing ring is a fluororubber sealing ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model adopts an efficient quick plug-in mechanism to install and disassemble the ESUB components, which greatly shortens the assembly time of the ESUB components and improves the working efficiency.

[0017] 2. The utility model can ensure that the ESUB components are firmly connected and well sealed during operation through the locking components and the sealing sleeve, effectively avoiding accidents caused by loose connections or leakage.

[0018] 3. The quick plug-in and pull-out mechanism of the utility model is applicable to ESUB components of different specifications and models, has strong versatility, and can meet different operation requirements.

[0019] 4. The metal sealing sleeve of the utility model is made of a hard alloy material with high hardness and good wear resistance, which can effectively prevent leakage of high-pressure fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of an ESUB intermediate joint connection device described in the utility model.

[0022] 1-main structure, 2-metal sealing sleeve, 3-O-ring, 4-ESUB assembly, 5-installation tube, 6-locking component, 7-sealing sleeve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely explain the technical solutions in the embodiments of the utility model. It should be noted that the embodiments and features in the embodiments of the utility model can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0024] See also Figure 1 This embodiment describes an ESUB intermediate joint connection device, comprising a main structure (1), an ESUB component (4), a metal sealing sleeve (2) and a quick plug-in mechanism. The ESUB component (4) is installed in the main structure (1) via the quick plug-in mechanism, and a metal sealing sleeve (2) is provided at the connection between the ESUB component (4) and the main structure (1).

[0025] The surface of the main structure (1) in this example is nitrided. First, the parts to be nitrided are thoroughly cleaned to remove oil, rust and other impurities on the surface to ensure that the nitrided layer can be evenly and firmly attached. At the same time, the parts are finely ground and polished to make the surface roughness meet specific requirements, providing a good foundation for nitriding treatment. The process parameters of nitriding treatment are as follows: gas nitriding method is adopted, and the parts are placed in a nitriding furnace filled with ammonia and nitrogen. The nitriding temperature is controlled between 500-570°C. The nitriding time is determined according to the specific size and requirements of the parts, usually within the range of 20-70 hours. The flow rate of ammonia is maintained at an appropriate level to ensure the stability of the nitrogen potential in the furnace.

[0026] After nitriding is completed, the parts are slowly cooled to a certain temperature in the furnace, and then taken out of the furnace for air cooling. The appearance of the nitrided parts is inspected to ensure that there are no defects such as cracks and peeling on the surface. Then, the hardness of the nitrided layer is tested using a hardness tester. The hardness can usually reach 900-1200HV or above to meet the wear and corrosion resistance requirements of the intermediate joint. The above-mentioned surface nitriding treatment process can significantly improve the surface hardness, wear resistance and corrosion resistance of the intermediate joint of the pumping perforating gun ESUB, thereby effectively extending its service life and improving its reliability and stability in harsh working environments.

[0027] The quick plug-in / pull-out mechanism comprises a mounting tube (5) and a locking component (6); the mounting tube (5) is arranged in the main structure (1); the ESUB component (4) is sleeved in the mounting tube (5); and the outer end of the connection portion between the mounting tube (5) and the ESUB component (4) is fixed by the locking component (6).

[0028] The end of the ESUB component (4) is connected to the driving component, and the locking component (6) is installed in the main structure (1).

[0029] A sealing sleeve (7) is installed at the gap between the installation tube (5) and the ESUB component (4).

[0030] When the device is inserting the ESUB component (4), the device is first aligned with the cavity of the main structure (1), and then the ESUB component (4) is slowly pushed into the cavity by the driving component. When the ESUB component (4) is inserted into place, the locking component (6) is automatically locked to firmly fix the ESUB component (4) in the main structure (1). At this time, a sealing sleeve (7) is installed at the gap between the installation tube (5) and the ESUB component (4) to ensure the sealing of the connection. When it is necessary to disassemble the ESUB component (4), the lock is first released. The fixing component (6) is locked, and then the ESUB component (4) is pulled out from the installation tube (5) through the driving component. By optimizing the structural design and adopting the efficient plug-in and pull-out driving component, the assembly time of the ESUB component 4 is greatly shortened and the operation efficiency is improved. The design of the locking component (6) and the sealing sleeve (7) can ensure that the ESUB component 4 is firmly connected and well sealed during the operation, and effectively avoids accidents caused by loose connection or leakage. The quick plug-in mechanism is suitable for ESUB components 4 of different specifications and models, has strong versatility, and can meet different operation requirements.

[0031] The main structure (1) is made of 35CrMo alloy material, and a specific high-strength 35CrMo alloy material is selected. First, the material is strictly quality tested to ensure that its chemical composition and physical properties meet the design requirements. Then, according to the design size and shape of the intermediate joint, a detailed processing technology plan is formulated. The CNC processing technology is used to firstly perform rough processing on the raw materials to remove excess materials, and then perform heat treatment processing, and reserve appropriate processing allowances. In the fine processing stage, high-precision CNC machine tools and cutting tools are used to accurately process various parts of the main structure 1 according to the design requirements, including channels, sealing grooves, connecting threads, etc. During the processing, the processing accuracy and surface roughness are strictly controlled to ensure the quality and performance of the main structure. The completed main structure 1 is subjected to comprehensive quality inspection, including dimensional accuracy inspection, surface quality inspection, non-destructive testing inspection, etc., to ensure that it meets the design requirements and relevant standards.

[0032] The metal sealing sleeve (2) is made of a hard alloy material with high hardness and good wear resistance, and is closely fitted with the matching surface through precision machining to form a second sealing defense line, thereby effectively preventing leakage of high-pressure fluid.

[0033] A pumping perforating gun comprises an ESUB intermediate joint connection device.

[0034] The main structure (1) is connected to the pumping perforating gun via threads arranged on the outside.

[0035] Selection of connecting thread specifications: After comprehensive consideration of the working pressure, load requirements and connection stability of the pumping perforating gun, "Refer to the 16th edition of 5B in the API standard", this thread specification has good versatility and reliability, and can meet the connection requirements under harsh working conditions. Thread tooth design: The tooth angle, pitch and tooth height of the optimized trapezoidal thread are accurately calculated to ensure that the thread can evenly distribute the load when subjected to axial and radial forces, reduce stress concentration, and improve the strength and durability of the connection. Thread accuracy level: In order to ensure tight connection and good sealing performance, 8c-level thread manufacturing is selected, and the dimensional tolerances of the middle diameter, major diameter and minor diameter of the thread, as well as the pitch error and tooth profile half-angle error of the thread are strictly controlled, so that the connecting thread can achieve precise matching during installation. Thread surface treatment: The process of nitriding the thread surface increases the hardness and wear resistance of the thread surface and extends the service life of the thread.

[0036] An O-type sealing ring (3) is provided at the connection between the main structure (1) and the pumping perforating gun.

[0037] The O-type sealing ring (3) is a fluororubber sealing ring.

[0038] At the sealing part of the main structure 1, high-precision processing equipment is used to process accurate sealing grooves. The size, shape and surface roughness of the sealing grooves must be strictly controlled in accordance with the design requirements to ensure that the sealing components can be accurately installed and play a good sealing effect. The fluororubber sealing ring and the metal sealing sleeve 2 are installed in turn. Before installing the fluororubber sealing ring, its appearance quality must be checked to ensure that there are no defects such as damage and deformation. The fluororubber sealing ring is gently placed in the sealing groove to ensure that its installation position is correct and it fits tightly with the bottom and sides of the sealing groove. For the metal sealing sleeve 2, it must be cleaned and inspected before installation to remove oil, impurities and burrs on the surface. Use special installation tools to carefully press the metal sealing ring into the sealing cavity to ensure that it is firmly installed. After the sealing component is installed, a sealing performance test is performed. Methods such as pressure test or airtight test can be used to check whether there is leakage in the sealing part. If leakage is found, find the cause in time and adjust and repair it to ensure that the sealing performance meets the requirements.

[0039] For the installation of pumped perforating guns, before installing the perforating gun, thoroughly clean the connecting parts between the intermediate joint and the perforating gun to remove oil, impurities and rust, ensure that the connecting surface is clean and flat, and check whether the connecting parts between the intermediate joint and the perforating gun are damaged, deformed or defective. If there is any problem, replace it in time.

[0040] First, align the connecting thread of the intermediate joint with the corresponding thread of the perforating gun, gently rotate the intermediate joint to make it initially screwed into the threaded hole of the perforating gun, use a torque wrench to gradually tighten the intermediate joint according to the specified torque value, ensure that the connection is firm but not over-tightened to avoid damaging the thread. During the tightening process, pay attention to keep the axis of the intermediate joint and the perforating gun aligned to avoid deflection.

[0041] After the installation is completed, conduct a comprehensive inspection of the connection parts. Check the tightness of the threads to ensure that the specified torque value is reached. Check whether there is leakage in the connection parts. You can use methods such as pressure test or air tightness test. At the same time, check whether the relative position of the intermediate joint and the perforating gun is correct to ensure that it can function normally during operation. During the installation process, avoid using excessive force to force the installation to avoid damage to the components. Follow the installation sequence and requirements to ensure that each step is completed correctly. The installer should be professionally trained and familiar with the installation process and precautions to ensure the quality and safety of the installation.

[0042] The embodiments of the utility model disclosed above are only used to help explain the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model.

Claims

1. An ESUB intermediate joint connection device, characterized in that: It comprises a main structure (1), an ESUB component (4), a metal sealing sleeve (2) and a quick plug-in mechanism. The ESUB component (4) is installed in the main structure (1) via the quick plug-in mechanism, and a metal sealing sleeve (2) is provided at the connection between the ESUB component (4) and the main structure (1).

2. An ESUB intermediate joint connection device according to claim 1, characterized in that: The quick plug-in / pull-out mechanism comprises a mounting tube (5) and a locking component (6); the mounting tube (5) is arranged in the main structure (1); the ESUB component (4) is sleeved in the mounting tube (5); and the outer end of the connection portion between the mounting tube (5) and the ESUB component (4) is fixed by the locking component (6).

3. An ESUB intermediate joint connection device according to claim 2, characterized in that: The end of the ESUB component (4) is connected to the driving component, and the locking component (6) is installed in the main structure (1).

4. The ESUB intermediate joint connection device according to claim 2, characterized in that: A sealing sleeve (7) is installed at the gap between the installation tube (5) and the ESUB component (4).

5. The ESUB intermediate joint connection device according to claim 1, characterized in that: The main structure (1) is made of 35CrMo alloy material.

6. The ESUB intermediate joint connection device according to claim 1, characterized in that: The metal sealing sleeve (2) is made of hard alloy material.

7. A pumping perforating gun, characterized in that: The invention comprises the ESUB intermediate joint connecting device as described in any one of claims 1 to 5.

8. A pumping perforating gun according to claim 7, characterized in that: The main structure (1) is connected to the pumping perforating gun via threads arranged on the outside.

9. A pumping perforating gun according to claim 8, characterized in that: An O-type sealing ring (3) is provided at the connection between the main structure (1) and the pumping perforating gun.

10. A pumping perforating gun according to claim 9, characterized in that: The O-type sealing ring (3) is a fluororubber sealing ring.

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