Pentagram-shaped high-temperature-resistant hydrogen sulfide-resistant screw pump sealing punching device

Abstract

The utility model discloses a five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device, the main body structure of the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device is a lower sealing occlusion ring and an upper sealing occlusion ring which are occluded up and down, and the five-pointed star type high-temperature-resistant hydrogen sulfide-resistant screw pump sealing impact device comprises the lower sealing occlusion ring and the upper sealing occlusion ring, a pentagram-shaped occlusion groove is formed in the bottom surface of the upper sealing occlusion ring, the pentagram-shaped occlusion groove and the pentagram-shaped occlusion convex teeth are mutually occluded and clamped, and newly synthesized difluoro vulcanized phenyl silicone rubber is adopted as a main body material. Through the arrangement of the lower sealing occlusion ring and the upper sealing occlusion ring, close fit of the lower sealing occlusion ring and the upper sealing occlusion ring can be achieved, the occlusion surface is of a five-pointed star-shaped three-dimensional structure distributed in the radial direction, the structure has good impact resistance and scouring resistance, the overall structure is simple in process, installation is convenient, the service life is long, and the service life is long. The stable sealing performance of the sealing device in a high-temperature and hydrogen sulfide environment is ensured, and medium leakage is prevented.

Description

Technical Field

[0001] This utility model relates to the field of screw pump sealing flushing technology, specifically a five-pointed star-shaped high-temperature and hydrogen sulfide resistant screw pump sealing flushing device. Background Technology

[0002] Currently, screw pumps primarily use XB35 type asbestos boards or graphite spiral wound gaskets as sealing materials for their sealing points. While asbestos boards possess some high-temperature resistance, their low mechanical strength makes them prone to deformation or breakage under high pressure and high speed conditions, leading to seal failure. Furthermore, asbestos materials are susceptible to chemical corrosion in hydrogen sulfide environments, accelerating gasket deterioration and shortening service life. In deep shale gas drilling, the materials used are also affected by hydrogen sulfide, making dynamic seals prone to leakage under high temperature, high speed, strong impact, and strong scouring conditions, resulting in a short service life, typically not exceeding 48 hours. Under high-temperature conditions, external circulation cooling of the drilling fluid is sometimes necessary, severely restricting the development of deep sulfur-bearing shale gas. Utility Model Content

[0003] The purpose of this invention is to provide a five-pointed star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device to solve the problem mentioned in the background art that the gaskets used in common screw pumps for various sealing points are mostly XB35 type asbestos boards, and the sealing point gaskets are graphite spiral wound gaskets, which have complex structures, short service life, and limited operating environments. Furthermore, in deep shale gas drilling, the materials used are susceptible to leakage at dynamic sealing points under conditions of high temperature, high speed, strong impact, and strong scouring due to the influence of hydrogen sulfide, resulting in a short service life, typically not exceeding 48 hours.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a five-pointed star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device, the main structure of which consists of a lower sealing engagement ring and an upper sealing engagement ring that interlock vertically, including a lower sealing engagement ring and an upper sealing engagement ring:

[0005] The top surface of the lower sealing ring is provided with a pentagonal star-shaped engagement protrusion, and the bottom surface of the upper sealing ring is provided with a pentagonal star-shaped engagement groove. The pentagonal star-shaped engagement groove and the pentagonal star-shaped engagement protrusion engage and lock together.

[0006] By adopting the above technical solution, a tight fit between the lower sealing ring and the upper sealing ring can be achieved, ensuring the stable sealing performance of the sealing device under high temperature and hydrogen sulfide environment, and preventing media leakage.

[0007] Preferably, the material used for the lower sealing engagement ring is bisfluorocured styrene-based silicone rubber, and the process used for the lower sealing engagement ring is a one-time molding thermoplastic process.

[0008] By adopting the above technical solution, the material has good high temperature resistance, hydrogen sulfide resistance, and wear resistance. It has high strength and good toughness, which can ensure that the lower sealing ring has excellent high temperature resistance and hydrogen sulfide corrosion resistance. At the same time, the one-time molding process improves the structural strength and sealing surface precision.

[0009] Preferably, the upper sealing engagement ring is made of difluorocured styrene-based silicone rubber, and the upper sealing engagement ring is manufactured using a one-time thermoplastic molding process.

[0010] By adopting the above technical solution, the material has good high temperature resistance, hydrogen sulfide resistance, wear resistance, high strength, and good toughness. It can ensure the material consistency between the upper sealing ring and the lower sealing ring, improve the corrosion resistance and high temperature stability of the overall sealing device, and reduce the risk of deformation or failure caused by material differences.

[0011] Preferably, the pentagonal star-shaped biting protrusion has a three-dimensional pentagonal star-shaped structure, and several of these pentagonal star-shaped biting protrusions are evenly distributed around the center of the lower sealing biting ring in a central rotational symmetric structure.

[0012] By adopting the above technical solution, the pentagonal star-shaped interlocking teeth can evenly distribute the load when subjected to force, increase the contact pressure of the sealing surface, enhance the sealing effect, and reduce local wear.

[0013] Preferably, the pentagonal star-shaped occlusive groove is a concave pentagonal star-shaped groove, and several of these pentagonal star-shaped occlusive grooves are evenly distributed around the center of the upper sealing occlusive ring in a central rotational symmetric structure.

[0014] By adopting the above technical solution, the pentagonal star-shaped interlocking groove and the pentagonal star-shaped interlocking protrusion can be precisely matched, ensuring no gaps during the interlocking process and improving the reliability and durability of the sealing device.

[0015] Preferably, the lower sealing engagement ring also has a lower guide hole at the center, and the upper sealing engagement ring has an upper guide hole at the center, and the upper guide hole and the lower guide hole are interconnected.

[0016] By adopting the above technical solution, the fluid can flow smoothly through the lower guide hole and the upper guide hole, reducing fluid resistance and avoiding corrosion or blockage of the sealing surface caused by fluid stagnation.

[0017] Preferably, the lower guide hole and the upper guide hole have the same inner diameter.

[0018] By adopting the above technical solution, it can be ensured that the fluid flows at the same speed in the lower guide hole and the upper guide hole, avoiding turbulence or pressure loss caused by the difference in hole diameter, and improving the fluid dynamics performance of the sealing device.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a lower sealing engagement ring and an upper sealing engagement ring, a tight fit between the lower sealing engagement ring and the upper sealing engagement ring can be achieved. The engagement surface is a radially distributed pentagonal star-shaped three-dimensional structure, which has good impact resistance and erosion resistance. The overall structure is simple in process, easy to install, and has a long service life, ensuring the stable sealing performance of the sealing device in high temperature and hydrogen sulfide environments and preventing media leakage. The bisfluorocured styrene silicone rubber has excellent high temperature resistance and hydrogen sulfide corrosion resistance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the engagement structure of the lower sealing engagement ring and the upper sealing engagement ring in this application;

[0021] Figure 2 This is a schematic diagram of the sealing engagement ring structure in this application;

[0022] Figure 3 This is a schematic diagram of the sealing engagement ring structure in this application;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the sealing engagement ring in this application;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the sealing engagement ring in this application;

[0025] Figure 6 This is a top view of the sealing engagement ring structure of this application.

[0026] In the diagram: 1. Lower sealing engagement ring; 101. Pentagonal star-shaped engagement protrusion; 102. Lower guide hole; 2. Upper sealing engagement ring; 201. Pentagonal star-shaped engagement groove; 202. Upper guide hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: a pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device, the main structure of which is a lower sealing engagement ring 1 and an upper sealing engagement ring 2 that interlock vertically, including the lower sealing engagement ring 1 and the upper sealing engagement ring 2:

[0030] The top surface of the lower sealing ring 1 is provided with a pentagonal star-shaped engagement protrusion 101, and the bottom surface of the upper sealing ring 2 is provided with a pentagonal star-shaped engagement groove 201. The pentagonal star-shaped engagement groove 201 and the pentagonal star-shaped engagement protrusion 101 engage and lock together, which can achieve a tight fit between the lower sealing ring 1 and the upper sealing ring 2, ensuring the stable sealing performance of the sealing device in high temperature and hydrogen sulfide environment, and preventing media leakage.

[0031] The material used for the lower sealing engagement ring 1 is bisfluorocured styrene-based silicone rubber. The lower sealing engagement ring 1 is manufactured using a one-time molding thermoplastic process. This material has good high temperature resistance, hydrogen sulfide resistance, and wear resistance. It has high strength and good toughness, which can ensure that the lower sealing engagement ring 1 has excellent high temperature resistance and hydrogen sulfide corrosion resistance. At the same time, the one-time molding process improves the structural strength and sealing surface precision.

[0032] Example 2

[0033] Please see Figure 4 , Figure 5 and Figure 6 This embodiment provides a technical solution: a pentagonal star-shaped high-temperature and hydrogen sulfide resistant screw pump sealing device, including a lower sealing engagement ring 1 and an upper sealing engagement ring 2.

[0034] The upper sealing ring 2 is made of bisfluorocured styrene-based silicone rubber and is manufactured using a one-time thermoplastic molding process. This material has good high temperature resistance, hydrogen sulfide resistance, and wear resistance. It has high strength and good toughness, which can ensure the material consistency between the upper sealing ring 2 and the lower sealing ring 1, improve the corrosion resistance and high temperature stability of the overall sealing device, and reduce the risk of deformation or failure due to material differences.

[0035] The five-pointed star-shaped interlocking teeth 101 have a three-dimensional five-pointed star shape. Several five-pointed star-shaped interlocking teeth 101 are evenly distributed around the center of the lower sealing interlocking ring 1 in a central rotational symmetry structure. This allows the five-pointed star-shaped interlocking teeth 101 to evenly distribute the load when under force, increase the contact pressure of the sealing surface, enhance the sealing effect, and at the same time reduce local wear, avoiding wear or sealing failure caused by uneven force.

[0036] The pentagonal star-shaped engagement groove 201 has an inwardly concave pentagonal star-shaped groove. Several pentagonal star-shaped engagement grooves 201 are evenly distributed around the center of the upper sealing engagement ring 2 in a centrally rotationally symmetrical structure. This allows the pentagonal star-shaped engagement grooves 201 to precisely match the pentagonal star-shaped engagement protrusions 101, ensuring no gaps during engagement, improving the reliability and durability of the sealing device, and enabling it to maintain stable sealing performance under dynamic working conditions.

[0037] A lower guide hole 102 is provided at the center of the lower sealing engagement ring, and an upper guide hole 202 is provided at the center of the upper sealing engagement ring 2. The upper guide hole 202 and the lower guide hole 102 are interconnected, which allows the fluid to flow smoothly through the lower guide hole 102 and the upper guide hole 202, reducing fluid resistance and preventing corrosion or blockage of the sealing surface caused by fluid stagnation, thereby improving the working efficiency and service life of the sealing device.

[0038] The lower guide hole 102 and the upper guide hole 202 have the same inner diameter, which can ensure that the fluid flows at the same speed in the lower guide hole 102 and the upper guide hole 202, avoiding turbulence or pressure loss caused by the difference in hole diameter, and improving the fluid dynamics performance of the sealing device.

[0039] Working Principle: First, the lower sealing ring 1 and the upper sealing ring 2 are precisely aligned and installed through the interlocking of the pentagonal star-shaped interlocking protrusions 101 and the pentagonal star-shaped interlocking grooves 201, ensuring a tight fit. In high-temperature and hydrogen sulfide environments, the corrosion resistance and thermal stability of the difluoropolymer silicone rubber material effectively prevent deformation or failure of the sealing surface. When the screw pump is running, the medium flows smoothly through the lower guide hole 102 and the upper guide hole 202, reducing fluid resistance and avoiding corrosion or blockage caused by local stagnation. Simultaneously, the uniform load distribution of the pentagonal star-shaped interlocking structure enhances the contact pressure of the sealing surface, ensuring stable sealing performance. Under dynamic operating conditions, the rotationally symmetrical pentagonal star-shaped interlocking structure can adaptively adjust the force, reducing local wear and improving the durability of the sealing device. Furthermore, the one-piece thermoplastic molding process ensures high precision of the sealing surface, enabling the entire device to maintain excellent sealing performance during long-term operation.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A five-pointed star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device, characterized in that, The main structure consists of a lower sealing ring and an upper sealing ring that interlock, including: The top surface of the lower sealing engagement ring is provided with a pentagonal star-shaped engagement tooth; The bottom surface of the upper sealing engagement ring is provided with a pentagonal star-shaped engagement groove, which engages with the pentagonal star-shaped engagement protrusion.

2. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The lower sealing ring is made of difluorocured styrene-based silicone rubber and is manufactured using a one-time thermoplastic molding process.

3. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The upper sealing ring is made of difluorocured styrene-based silicone rubber and is manufactured using a one-time thermoplastic molding process.

4. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The five-pointed star-shaped biting protrusion has a three-dimensional five-pointed star shape. Several of these five-pointed star-shaped biting protrusions are evenly distributed around the center of the lower sealing biting ring in a central rotational symmetry structure.

5. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The five-pointed star-shaped occlusal groove has an inwardly concave five-pointed star-shaped groove, and several of these five-pointed star-shaped occlusal grooves are evenly distributed around the center of the upper sealing occlusal ring in a central rotational symmetry structure.

6. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The lower sealing engagement ring also has a lower guide hole at the center, and the upper sealing engagement ring has an upper guide hole at the center. The upper guide hole and the lower guide hole are connected to each other.

7. The pentagonal star-shaped high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 6, characterized in that: The lower guide hole and the upper guide hole have the same inner diameter.

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