A serrated high-temperature-resistant hydrogen sulfide-resistant screw pump seal device

Abstract

The utility model discloses a sawtooth type high temperature resistance hydrogen sulfide resistance screw pump seal punch device, the main body structure is the lower seal occlusion ring and the upper seal occlusion ring of occlusion up and down, including lower seal occlusion ring and upper seal occlusion ring: the top of this lower seal occlusion ring is provided with sawtooth type occlusion male tooth, the bottom of this upper seal occlusion ring is provided with sawtooth type occlusion female tooth, and the sawtooth type occlusion female tooth and sawtooth type occlusion male tooth are mutually occluded and clamped, and the new synthesis of difluorosulfide benzene silicon base rubber is the main body material. The utility model discloses through being provided with lower seal occlusion ring and upper seal occlusion ring, can realize the close cooperation of lower seal occlusion ring and upper seal occlusion ring, and the occlusion surface is the radial distribution sawtooth type three -dimensional structure, and this structure has good impact resistance, the scouring characteristic, and the whole structure process is simple, convenient installation, long in life, ensures the stable sealing performance of sealing device under high temperature and hydrogen sulfide environment, prevents medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of screw pump seal flushing technology, specifically a sawtooth-type high-temperature and hydrogen sulfide resistant screw pump seal 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 sawtooth-type high-temperature and hydrogen sulfide-resistant screw pump sealing device to solve the problems mentioned in the background art, where common screw pumps often use XB35 type asbestos boards and graphite spiral wound gaskets for sealing points, resulting in complex structures, short service lives, 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, leading to a short service life, typically not exceeding 48 hours.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a sawtooth-type 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 serrated engagement protrusions, and the bottom surface of the upper sealing ring is provided with serrated engagement grooves. The serrated engagement grooves and the serrated engagement protrusions 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 serrated biting protrusion has a serrated three-dimensional structure, and several of the serrated 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 serrated interlocking teeth can distribute the load evenly when subjected to force, increase the contact pressure of the sealing surface, enhance the sealing effect, and reduce local wear.

[0013] Preferably, the serrated engagement groove has an inwardly concave serrated shape, and several of these serrated engagement grooves are evenly distributed around the center of the upper sealing engagement ring in a centrally rotationally symmetrical structure.

[0014] By adopting the above technical solution, the serrated engagement groove and the serrated engagement protrusion can be precisely matched to ensure no gaps during engagement and improve 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 has a radially distributed sawtooth 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] In the figure: 1. Lower sealing engagement ring; 101. Serrated engagement protrusion; 102. Lower guide hole; 2. Upper sealing engagement ring; 201. Serrated engagement groove; 202. Upper guide hole. Detailed Implementation

[0026] 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. Example

[0027] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: a sawtooth-type 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:

[0028] The top surface of the lower sealing ring 1 is provided with a serrated engagement protrusion 101, and the bottom surface of the upper sealing ring 2 is provided with a serrated engagement groove 201. The serrated engagement groove 201 and the serrated 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.

[0029] Example 2: Please refer to Figure 4 and Figure 5 This embodiment provides a technical solution: a sawtooth-type high-temperature and hydrogen sulfide-resistant screw pump sealing device, including a lower sealing engagement ring 1 and an upper sealing engagement ring 2.

[0030] 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.

[0031] 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.

[0032] The sawtooth-shaped interlocking protrusions 101 have a sawtooth-shaped three-dimensional structure. Several sawtooth-shaped interlocking protrusions 101 are evenly distributed around the center of the lower sealing interlocking ring 1 in a central rotational symmetric structure. This allows the sawtooth-shaped interlocking protrusions 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.

[0033] The serrated engagement groove 201 has an inwardly concave serrated shape. Several serrated engagement grooves 201 are evenly distributed around the center of the upper sealing engagement ring 2 in a central rotational symmetry structure. This allows the serrated engagement groove 201 to precisely match the serrated engagement protrusion 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.

[0034] 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.

[0035] 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.

[0036] Working Principle: First, the lower sealing ring 1 and the upper sealing ring 2 are precisely aligned and installed through the interlocking of the sawtooth-shaped interlocking protrusions 101 and the sawtooth-shaped interlocking grooves 201, ensuring a tight fit. In high-temperature and hydrogen sulfide environments, the corrosion resistance and thermal stability of the difluorocured styrene-based 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 sawtooth interlocking structure enhances the contact pressure of the sealing surface, ensuring stable sealing performance. Under dynamic operating conditions, the rotationally symmetrical sawtooth interlocking structure can adaptively adjust the force, reducing local wear and improving the durability of the sealing device. Furthermore, the one-time molding thermoplastic process ensures high precision of the sealing surface, enabling the entire device to maintain excellent sealing performance during long-term operation.

[0037] 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.

[0038] 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 sawtooth-type 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. The top surface of the lower sealing engagement ring is provided with serrated engagement protrusions; The bottom surface of the upper sealing engagement ring is provided with a serrated engagement groove, which engages with the serrated engagement protrusion.

2. The sawtooth-type 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 sawtooth-type 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 sawtooth-type high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The serrated biting protrusion has a serrated three-dimensional structure. Several of these serrated biting protrusions are evenly distributed around the center of the lower sealing biting ring in a central rotational symmetric structure.

5. The sawtooth-type high-temperature and hydrogen sulfide-resistant screw pump sealing device according to claim 1, characterized in that: The serrated engagement groove has an inwardly concave serrated shape, and several of these serrated engagement grooves are evenly distributed around the center of the upper sealing engagement ring in a centrally rotationally symmetrical structure.

6. The sawtooth-type 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 sawtooth-type 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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