Novel fracturing pump plunger packing group and plunger pump for oil and gas field fracturing construction

Abstract

The utility model provides a novel fracturing pump plunger packing set and a plunger pump for oil and gas field fracturing construction, relates to the field of oil and gas field hydraulic fracturing equipment, and solves the technical problems that a sealing mechanism is poor in structural stability, long in manufacturing period and short in service life. The novel fracturing pump plunger packing set comprises a sealing mechanism, the sealing mechanism comprises a supporting piece and a sealing piece, the supporting piece and the sealing piece are arranged on a plunger in a sleeving mode and used for being in sealing fit with a fluid end valve box, a V-shaped groove is formed in the supporting piece, an installation part is arranged on the sealing piece, and the installation part extends into the V-shaped groove and is fixedly connected with the V-shaped groove in an inserted mode; the supporting piece is made of a plastic material or a polymer material, and the sealing piece is made of a rubber material or a cloth-sandwiched rubber material; the supporting piece and the sealing piece jointly play a sealing role between the plunger and the fluid end valve box, and the sealing performance is improved. The supporting piece is made of plastic materials or polymer materials and can be machined, the sealing piece is made of rubber materials or cloth clamping rubber and can be formed in a compression molding mode, and therefore the manufacturing period is shortened.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic fracturing equipment for oil and gas fields, and in particular to a novel fracturing pump plunger packing assembly and a plunger pump for oil and gas field fracturing operations. Background Technology

[0002] Currently, fracturing is the main method for increasing oil and gas production in oil and gas field development. The plunger pump, as a key component of fracturing equipment, pumps high-pressure fracturing media to break up the formation, thereby increasing oil and gas production. The plunger pump is powered by its power end, driving the plunger to perform high-speed reciprocating linear motion, which in turn drives the fracturing media in the hydraulic end valve box (hydraulic end pump head) to be drawn in and discharged, thus achieving pumping.

[0003] The plunger packing assembly of the fracturing pump serves as a sealing mechanism between the plunger and the hydraulic end valve box, mainly playing the role of sealing the high-pressure fracturing medium. This plunger packing assembly is subjected to the reciprocating friction of the plunger and the high-pressure extrusion of the medium, and it is easily worn out, making it a conventional consumable on the fracturing pump.

[0004] The applicant has discovered that the prior art has at least the following technical problems: the sealing effect of the plunger packing assembly of the fracturing pump in the prior art is poor. The support component is made of cloth-reinforced rubber and the sealing component is made of rubber or cloth-reinforced rubber. Both are manufactured by compression molding and vulcanization, which has a long manufacturing cycle. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of fracturing pump plunger packing assembly and a plunger pump for oil and gas field fracturing operations, so as to solve the technical problems of unstable structure, long manufacturing cycle and short service life of the sealing mechanism on the plunger in the prior art; the various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The novel fracturing pump plunger packing assembly provided by this utility model includes a sealing mechanism, wherein the sealing mechanism includes a support member and a sealing member, wherein:

[0008] Both the support and the seal are fitted onto the plunger for sealing with the hydraulic valve box. The support has a V-groove, and the seal has an mounting part that extends into the V-groove and is inserted into and fixed to the V-groove. The support is made of plastic or polymer material, and the seal is made of rubber.

[0009] Preferably, a positioning groove is provided in the V-groove, and the positioning groove is recessed in a direction away from the opening of the V-groove;

[0010] The mounting part is provided with a protrusion, which is inserted into the positioning groove to engage and fix the mounting part with the V-groove.

[0011] Preferably, the mounting portion is an arc-shaped protrusion structure.

[0012] Preferably, the support member includes a first support member and a second support member, wherein:

[0013] The mounting structure between the first support member and the second support member is the same as the mounting structure between the seal member and the second support member.

[0014] Preferably, the outer surface of the support member has a planar structure.

[0015] Preferably, the outer surface of the seal has a conical structure.

[0016] Preferably, the support is made of polycarbonate, polyetheretherketone, polytetrafluoroethylene, MDI, or PPDI.

[0017] Preferably, the seal is made of fabric-reinforced rubber.

[0018] This utility model also provides a plunger pump for oil and gas field fracturing operations, including the above-mentioned novel fracturing pump plunger packing assembly.

[0019] The novel fracturing pump plunger packing assembly and plunger pump for oil and gas field fracturing operations provided by this utility model have the following advantages compared with the prior art: the mounting part on the seal extends into the V-groove and is fixedly inserted into the V-groove; the support component supports the seal, preventing it from falling off or deforming, thus improving structural stability; the support component and the seal together provide a sealing effect between the plunger and the hydraulic end valve box, improving sealing performance. The support component is made of plastic or polymer material, which can be machined, resulting in high production efficiency; the seal is made of rubber or fabric-reinforced rubber, thus shortening the manufacturing cycle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the hydraulic end assembly of a fracturing plunger pump;

[0022] Figure 2 This is a cross-sectional schematic diagram of the sealing mechanism of the plunger packing assembly in a novel fracturing pump;

[0023] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0024] In the figure: 1. Valve seat; 2. Valve assembly; 3. Plunger; 4. Hydraulic pump head; 5. Suction channel; 6. Discharge channel; 7. Fracturing pump plunger packing assembly; 71. First support; 72. Second support; 73. Seal; 731. Mounting part; 732. Protrusion; 721. V-groove; 722. Positioning groove. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] See Figure 1As shown, the plunger pump, a key component of fracturing equipment, pumps high-pressure fracturing media to break up the formation, thereby increasing oil and gas production. The plunger pump is powered by a power source, driving the plunger 3 in high-speed reciprocating linear motion, which in turn drives the fracturing media in the hydraulic end valve box (hydraulic end pump head 4) to be drawn in and discharged. The valve assembly 2 and valve seat 1, as key components of the fracturing media intake channel 5 and discharge channel 6, open and close at high speed during the continuous intake and discharge of fracturing media. The fracturing pump plunger packing assembly 7, as the sealing mechanism between the plunger and the hydraulic end valve box, mainly seals the high-pressure fracturing media. This fracturing pump plunger packing assembly 7 is subjected to the reciprocating friction of the plunger and the high-pressure compression of the media, making it easily worn and a common consumable item on the fracturing pump. The sealing effect of the plunger packing group 7 in the existing fracturing pump is poor. All the seals on it are made of rubber, and the manufacturing cycle is long (the sealing structure on it is either entirely made of cloth-reinforced rubber, or partly made of cloth-reinforced rubber and partly made of rubber. They are all made by compression molding and vulcanization, which results in a long manufacturing cycle).

[0029] See Figure 1 As shown in the figure, this utility model embodiment provides a novel fracturing pump plunger packing assembly and a plunger pump for oil and gas field fracturing operations, which can improve sealing performance and shorten the manufacturing cycle.

[0030] The following is combined with Figures 1-3 The technical solution provided by this utility model will be described in more detail.

[0031] Example 1

[0032] like Figure 2 and Figure 3 As shown, the novel fracturing pump plunger packing assembly 7 provided by this utility model includes a sealing mechanism, which includes a support member and a sealing member 73. The support member and the sealing member 73 are both sleeved on the plunger 3 for sealing cooperation with the hydraulic end valve box. The support member is provided with a V-groove 721, and the sealing member 73 is provided with an installation part 731. The installation part 731 extends into the V-groove 721 and is inserted and fixed to the V-groove 721. The support member is made of polymer material, and the sealing member 73 is made of rubber material.

[0033] The novel fracturing pump plunger packing assembly 7 provided by this utility model has a mounting part 731 on the seal 73 extending into the V-groove 721 and being inserted and fixed to the V-groove 721. The support member serves to support the seal 73, preventing the seal 73 from falling off or deforming, and improving the stability of the structure. The support member and the seal 73 together play a sealing role between the plunger 3 and the hydraulic end valve box, improving the sealing performance.

[0034] The support components are made of plastic (or polymer) and can be machined. The seal 73 is made of rubber or fabric-reinforced rubber and can be molded, thereby shortening the manufacturing cycle.

[0035] See Figure 2 As shown, both the support and the seal 73 are annular structures, which facilitates their fitting onto the plunger 3.

[0036] As an optional implementation, the support includes a first support 71 and a second support 72, wherein the mounting structure between the first support 71 and the second support 72 is the same as the mounting structure between the seal 73 and the support.

[0037] As an optional implementation, see Figure 2 , Figure 3 As shown, the support includes a first support 71 and a second support 72, wherein the installation structure between the first support 71 and the second support 72 is the same as the installation structure between the seal 73 and the second support 72.

[0038] For details, see Figure 2 and Figure 3 As shown, in this embodiment, a positioning groove 722 is provided in the V-groove 721, and the positioning groove 722 is recessed in the direction away from the opening of the V-groove 721; a protrusion 732 is provided on the mounting part 731, and the protrusion 732 is inserted into the positioning groove 722, thereby engaging and fixing the mounting part 731 with the V-groove 721.

[0039] See Figure 3 As shown, the mounting part 731 is inserted into the V-groove 721, and the protrusion 732 is inserted into the positioning groove 722. This can further improve the stability of the connection structure between the support and the seal 73, prevent them from detaching from each other, improve the stability of the seal 73 structure, ensure the sealing effect, prevent the sealing mechanism from having a poor sealing effect due to the seal 73 falling off, which would render the fracturing pump plunger packing assembly 7 unusable, and extend the service life of the fracturing pump plunger packing assembly 7.

[0040] As an optional implementation, see Figure 2 and Figure 3 As shown, the mounting part 731 has an arc-shaped protrusion structure.

[0041] The mounting part 731 of the above structure is easy to insert into the V-groove 721, thereby facilitating the connection between the seal 73 and the support.

[0042] As an optional implementation, see Figure 2 and Figure 3 As shown, the outer surface of the support members (first support member 71 and second support member 72) is a planar structure.

[0043] As an optional implementation, see Figure 2 and Figure 3 As shown, the outer surface of the seal 73 has a conical structure.

[0044] The outer surface of the seal 73 is in sealing contact with the hydraulic end valve box, which mainly serves to seal the high-pressure fracturing medium.

[0045] The first support member 71, the second support member 72, and the seal member 73 act as a triple barrier, working together to seal and prevent leakage of high-pressure fracturing medium; and the support member supports the seal member 73 to prevent the seal member 73 from detaching.

[0046] As an optional implementation, the support component in this embodiment is made of polycarbonate, polyetheretherketone, polytetrafluoroethylene, MDI, or PPDI and can be machined.

[0047] As an optional implementation, the seal 73 in this embodiment is made of fabric-reinforced rubber and can be molded.

[0048] In this embodiment, the fracturing pump plunger packing assembly 7 serves two purposes. First, the support member supports the seal 73, preventing it from falling off or deforming. This ensures the seal 73 is stably fixed to the plunger 3, improving structural stability, guaranteeing sealing performance, and preventing poor sealing or even failure due to seal 73 falling off, which would render the fracturing pump plunger packing assembly 7 unusable. Second, the more stable structure of the seal 73 extends the service life of the fracturing pump plunger packing assembly 7, preventing the seal 73 from necessitating replacement.

[0049] Example 2

[0050] See Figure 1 As shown, this embodiment provides a plunger pump for oil and gas field fracturing operations, including the aforementioned novel fracturing pump plunger packing assembly 7.

[0051] The plunger pump used in the oil and gas field fracturing operation of this embodiment has improved sealing performance due to the presence of the novel fracturing pump plunger packing assembly 7. The support component is made of plastic or polymer material and can be machined, while the sealing component 73 is made of rubber or fabric-reinforced rubber and can be molded, thereby shortening the manufacturing cycle.

[0052] The specific features, structures, or characteristics described in this specification may be combined in any suitable manner in one or more embodiments or examples.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A novel fracturing pump plunger packing assembly, characterized in that, The sealing mechanism includes a support member and a sealing member, wherein: Both the support and the seal are fitted onto the plunger for sealing with the hydraulic valve box. The support has a V-groove, and the seal has an mounting part that extends into the V-groove and is inserted into and fixed to the V-groove. The support is made of polymer or plastic, and the seal is made of rubber.

2. The novel fracturing pump plunger packing assembly according to claim 1, characterized in that, The V-groove is provided with a positioning groove, which is recessed in a direction away from the opening of the V-groove. The mounting part is provided with a protrusion, which is inserted into the positioning groove to engage and fix the mounting part with the V-groove.

3. The novel fracturing pump plunger packing assembly according to claim 1, characterized in that, The mounting part has an arc-shaped protrusion structure.

4. The novel fracturing pump plunger packing assembly according to any one of claims 1-3, characterized in that, The support includes a first support and a second support, wherein: The mounting structure between the first support member and the second support member is the same as the mounting structure between the seal member and the second support member.

5. The novel fracturing pump plunger packing assembly according to claim 1, characterized in that, The outer surface of the support member is a planar structure.

6. The novel fracturing pump plunger packing assembly according to claim 5, characterized in that, The outer surface of the seal has a conical structure.

7. The novel fracturing pump plunger packing assembly according to claim 1, characterized in that, The support is made of polycarbonate, polyetheretherketone, polytetrafluoroethylene, MDI, or PPDI.

8. The novel fracturing pump plunger packing assembly according to claim 1, characterized in that, The seal is made of fabric-reinforced rubber.

9. A plunger pump for fracturing operations in oil and gas fields, characterized in that, Includes the novel fracturing pump plunger packing assembly as described in any one of claims 1-8.

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