Novel valve body assembly and plunger pump for oil and gas field fracturing construction

Abstract

The utility model provides a novel valve body assembly and a plunger pump for oil and gas field fracturing construction, relates to the technical field of oil and gas field hydraulic fracturing equipment, and solves the technical problems that a valve body assembly is short in service life and needs to be replaced frequently. The novel valve body assembly comprises a valve body and a rubber piece, the valve body comprises a matching part used for making contact with a valve seat, a clamping groove is formed in the matching part, and the rubber piece is arranged in the clamping groove in a sleeved mode; the numerical range of the contact area of the rubber piece and the valve seat to the contact area of the matching part and the valve seat is 1 / 3-1; or the numerical value range of the contact area of the matching part and the valve seat to the contact area of the rubber piece and the valve seat is 1 / 3-1; by changing the proportion of the contact surfaces of the valve body, the valve rubber and the valve seat in the valve body assembly, high working pressure and collision frequency can be adapted, and meanwhile, the service life of the valve body assembly can be prolonged. The novel valve body assembly is suitable for plunger pumps for fracturing construction of oil and gas fields.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas field hydraulic fracturing equipment technical field especially a kind of new type valve body assembly and plunger pump of oil and gas field fracturing construction. BACKGROUND

[0002] At present, fracturing construction in oil and gas field exploitation is the main way of oil and gas production, and plunger pump, as a key component in fracturing equipment, realizes pumping by pumping high-pressure fracturing medium to open formation and thus to realize oil and gas production.

[0003] The plunger pump is powered by power end to drive the plunger to move at high speed in a straight line, and then to push the fracturing medium in the valve box (pump head) of plunger pump hydraulic end to realize pumping. The valve body assembly and valve seat are key components of fracturing medium suction channel and discharge channel, and the valve body assembly is opened and closed at high speed during the process of continuous suction and discharge of fracturing medium.

[0004] The valve body assembly in the prior art is assembled with valve rubber, and the valve body assembly collides with the valve seat at high speed during high-speed movement, which causes the service life of the valve body assembly to be extremely low, and the valve body assembly is thus a consumable and needs to be replaced frequently. SUMMARY

[0005] The utility model aims at providing a new type valve body assembly and plunger pump of oil and gas field fracturing construction to solve the technical problem of low service life of valve body assembly and frequent replacement in the prior art. The preferred technical solutions in the many technical solutions provided by the utility model can produce many technical effects, which are described below.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions.

[0007] The utility model provides a new type valve body assembly, which comprises a valve body and a rubber piece, wherein:

[0008] The valve body comprises a matching part for contacting with the valve seat, the matching part is provided with a clamping groove, and the rubber piece is sleeved in the clamping groove.

[0009] The contact area of the rubber piece with the valve seat is in the numerical range of 1 / 3-1 compared with the contact area of the matching part with the valve seat, or the contact area of the matching part with the valve seat is in the numerical range of 1 / 3-1 compared with the contact area of the rubber piece with the valve seat.

[0010] Preferably, the matching part comprises an inclined surface, the inclined surface is arranged obliquely compared with the axis of the valve body, and the inclined surface is used to contact with the working surface of the valve seat.

[0011] Preferably, a part of the rubber member protrudes from the clamping groove, the rubber member comprises a pressing part, the pressing part is located at the opposite side of the rest of the rubber member on the inclined surface, the pressing part can be elastically deformed when colliding with the working surface of the valve seat, and then the pressing part is in sealing cooperation with the valve seat.

[0012] Preferably, the pressing part comprises a conical structure, and the narrow end of the conical structure is used to collide with the valve seat.

[0013] Preferably, a groove is arranged on the inner wall of the clamping groove, the groove is recessed in the direction away from the inner wall of the clamping groove, and the groove is in contact with the rubber member to increase the friction.

[0014] Preferably, the contact area of the rubber member and the valve seat: the contact area of the cooperation part and the valve seat = 66.6%:33.4%.

[0015] Preferably, the contact area of the rubber member and the valve seat: the contact area of the cooperation part and the valve seat = 33.4%:66.6%.

[0016] Preferably, the clamping groove is an annular groove arranged around the axis of the valve body, and the rubber member is an annular structure.

[0017] The utility model discloses still provide a kind of plunger pump of oil and gas field fracturing construction, including valve seat and above-mentioned new valve body assembly.

[0018] The new valve body assembly and the plunger pump of oil and gas field fracturing construction provided by the utility model have the following beneficial effects compared with the prior art: the rubber member is sleeved in the clamping groove to prevent the rubber from separating from the valve body, change the proportion of the contact surface between the valve body and the valve rubber and the valve seat in the valve body assembly, which can adapt to high working pressure and collision frequency, and also can increase the service life of the valve body assembly. The new valve body assembly is suitable for the plunger pump of oil and gas field fracturing construction. At the same time, it is also suitable for the plunger pump of cementing construction and acidification construction. ACCURACY

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0020] Figure 1 It is a schematic view of the hydraulic end assembly of fracturing plunger pump;

[0021] Figure 2is a sectional structure schematic view of the new valve body assembly embodiment 1;

[0022] Figure 3 is Figure 2 is a local enlarged view at A in the middle;

[0023] Figure 4 is a sectional structure schematic view of the new valve body assembly embodiment 2.

[0024] Fig. 1, valve seat; 2, valve body assembly; 21, valve body; 211, inclined surface; 22, rubber part; 221, extrusion part; 23, clamping groove; 231, groove; 3, plunger; 4, fluid end pump head; 5, suction channel; 6, discharge channel. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope protected by the utility model.

[0026] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the utility model, it is also necessary to explain that, unless otherwise specified and limited, the terms "set", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] The utility model embodiment provides a kind of new valve body assembly and oil and gas field fracturing construction plunger pump, it can adapt to high working pressure and collision frequency, while it can realize the life of valve body assembly increase.

[0029] The technical solutions of the present application are described in more detail below. Figures 1-4 The technical solutions of the present application are described in more detail below.

[0030] Referring to Figure 1 As shown in the figure, the plunger pump is a key component in the fracturing equipment, which opens the formation by pumping high-pressure fracturing medium to realize oil and gas production. The plunger pump provides power through the power end, drives the plunger 3 to move at high speed, and then pushes the fracturing medium in the plunger pump liquid end valve box (liquid end pump head 4) to realize pumping. The valve body assembly 2 and the valve seat 1 are key components of the fracturing medium suction channel 5 and the discharge channel 6. During the continuous suction and discharge of the fracturing medium, the valve body assembly 2 is opened and closed at high speed. The valve body assembly 2 with the valve rubber is in high-speed reciprocating collision with the valve seat 1 during high-speed movement. This collision causes the service life of the valve body assembly 2 to be extremely low, and the valve body assembly 2 becomes a consumable and needs to be replaced frequently.

[0031] Example 1:

[0032] In view of the above problems, as shown in the figure, the present application provides a new valve body assembly 2, which comprises a valve body assembly 2 and a rubber piece 22, wherein: the valve body assembly 2 comprises a matching part for contacting with the valve seat 1, the matching part is provided with a clamping groove 23, and the rubber piece 22 is sleeved in the clamping groove 23; the contact area of the rubber piece 22 with the valve seat 1 is in the numerical range of 1 / 3-1 compared with the contact area of the matching part with the valve seat 1, as shown in the figure; or, the contact area of the matching part with the valve seat 1 is in the numerical range of 1 / 3-1 compared with the contact area of the rubber piece 22 with the valve seat 1, as shown in the figure. Figures 1-4 Figure 2 Figure 3

[0033] In the prior art, the contact area ratio of the valve body 21 and the valve rubber to the valve seat 1 is basically 50%:50%, which is difficult to improve the service life of the valve body assembly 2.

[0034] The new valve body assembly 2 of the present application sleeves the rubber piece 22 in the clamping groove 23 to prevent the rubber from separating from the valve body 21, and changes the contact area ratio of the valve body 21 and the valve rubber to the valve seat 1 in the valve body assembly 2, which can adapt to high working pressure and collision frequency, and at the same time, can realize the service life increase of the valve body assembly 2. The new valve body assembly 2 is suitable for the plunger 3 pump in oil and gas field fracturing construction. At the same time, it is also suitable for the plunger 3 pump in cementing construction and acidification construction.

[0035] As an optional embodiment, referring to Figures 2-4 ​​​As shown, the mating part in this embodiment includes an inclined surface 211, which is inclined relative to the axis of the valve body 21. The inclined surface 211 is used to contact the working surface of the valve seat 1.

[0036] The above structure can ensure the contact area between the valve body 21 and the valve seat 1, thereby improving the sealing performance between the two.

[0037] As an optional implementation, see Figure 3 As shown, a portion of the rubber part 22 protrudes from the slot 23. The rubber part 22 includes a compression portion 221. The compression portion 221 and the rest of the rubber part 22 are located on opposite sides of the inclined surface 211. The compression portion 221 can undergo elastic deformation when it collides and is compressed with the working surface of the valve seat 1, thereby sealing and engaging with the valve seat 1.

[0038] The extrusion part 221 is not coplanar with the inclined surface 211 of the valve body 21. The extrusion part 221 and the rest of the rubber part 22 are located on opposite sides of the inclined surface 211. With this arrangement, when the valve body assembly 2 and the valve seat 1 collide with each other, the extrusion part 221 is squeezed by the valve seat 1 and can undergo elastic deformation. It is compressed by the valve seat 1, thereby ensuring the sealing performance between the valve body assembly 2 and the valve seat 1.

[0039] As an optional implementation, see Figure 3 As shown, the extrusion section 221 includes a conical structure, the narrow end of which is used to collide and extrude with the valve seat 1.

[0040] This design facilitates elastic deformation of the extrusion section 221, thereby ensuring the sealing performance between the valve assembly 2 and the valve seat 1.

[0041] As an optional implementation, see Figure 3 As shown, a groove 231 is provided on the inner wall of the slot 23. The groove 231 is recessed in the direction away from the inner wall of the slot 23. The groove 231 contacts the rubber part 22 to increase the friction.

[0042] See Figure 3 As shown, the above-described structure of the slot 23 and the rubber part 22 can further prevent the rubber part 22 from shifting or detaching within the slot 23, thereby improving the stability of the connection structure between the rubber part 22 and the valve body 21.

[0043] As an optional implementation, see Figure 2 As shown, the contact area between the rubber part 22 and the valve seat 1 is 66.6% to 33.4% of the contact area between the mating part and the valve seat 1.

[0044] The valve assembly 2 reduces the contact area of the valve 21 with the valve seat 1 and increases the contact area of the rubber part 22 with the valve seat 1, so that the valve assembly 2 has high sealing performance and long service life in a high-pressure environment.

[0045] Through actual production and on-site testing, it is found that in a high-pressure environment (i.e., the Sichuan and Chongqing shale gas block), the structure of the preferred embodiment 1 is implemented, and the service life of the new valve assembly 2 can reach 10-12 segments (i.e., 20-24 hours), which is at least 20% longer than the service life of 6-8 segments (i.e., 12-16 hours) of the conventional valve assembly.

[0046] The principle of the embodiment is that when the working pressure of the valve assembly 2 is higher, the frequency of the reciprocating motion of the plunger is higher, the proportion of the contact area of the rubber part 22 with the valve seat 1 is increased, the overall weight is lighter, the impact force is relatively smaller, the buffering force of the rubber part 22 is better, and the valve assembly 1 and the valve seat are protected.

[0047] Embodiment 2

[0048] Referring to Figure 3 As shown in the figure, the contact area of the rubber part 22 with the valve seat 1: the contact area of the matching part with the valve seat 1 = 33.4%: 66.6%.

[0049] The new valve assembly 2 has the structure that the proportion of the rubber part 22 and the valve 21 is changed, the sealing performance is improved, and the service life of the valve assembly 2 is improved.

[0050] In a low-pressure environment (the Shanxi coal seam gas block), the new valve assembly 2 of the embodiment 2 is preferred, and the service life can reach 30-40 segments (i.e., 60-80 hours), which is at least 25% longer than the service life of 20-24 segments of the conventional valve assembly.

[0051] The principle of the embodiment is that when the working pressure of the valve assembly 2 is low, the frequency of the reciprocating motion of the plunger is low, the proportion of the contact area of the valve 21 with the valve seat 1 is increased, the overall weight is heavier, the impact force is relatively larger, and a better sealing effect is achieved.

[0052] The new valve assembly 2 is applied to oil and gas field fracturing operations, increases the service life of the valve assembly, improves the user experience, and achieves the preset purpose.

[0053] Embodiment 3

[0054] The embodiment provides a plunger pump for oil and gas field fracturing construction, which comprises a valve seat 1 and the new valve assembly 2.

[0055] The plunger pump for oil and gas field fracturing construction of the embodiment has the above-mentioned new type valve body assembly 2, and the service life of the valve body assembly 2 is increased by changing the proportion of the valve body 21 and the rubber piece 22 and the contact surface of the valve seat 1, thereby meeting the demand of the oil field fracturing for the long service life valve body assembly 2.

[0056] In the description of the specification, a specific feature, structure or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0057] In the description of the specification, the description of the terms “one embodiment”, “some embodiments”, “an example”, “a specific example” or “some examples” and the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is contained in at least one embodiment or example of the utility model. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific feature, structure, material or characteristic described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the description and the features of the different embodiments or examples without contradiction.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled in the technical field can easily think of the change or replacement within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A novel valve body assembly characterized by, The valve body and the rubber part are included, wherein: The valve body includes a matching part for contacting with the valve seat, and a clamping groove is arranged on the matching part, and the rubber part is sleeved in the clamping groove; The contact area of the rubber part with the valve seat is 1 / 3-1 of the contact area of the matching part with the valve seat, or the contact area of the matching part with the valve seat is 1 / 3-1 of the contact area of the rubber part with the valve seat.

2. The novel valve body assembly of claim 1, wherein The matching part includes an inclined surface which is arranged obliquely to the axis of the valve body and is used for contacting with the working surface of the valve seat.

3. The novel valve body assembly of claim 2, wherein, A part of the rubber part protrudes from the clamping groove, and the rubber part includes a pressing part which is located on the opposite side of the inclined surface from the rest of the rubber part, and the pressing part can be elastically deformed when colliding with the working surface of the valve seat, thereby sealingly cooperating with the valve seat.

4. The novel valve body assembly of claim 3, wherein, The pressing part includes a conical structure, and the narrow end of the conical structure is used for colliding with the valve seat.

5. The novel valve body assembly of claim 1, wherein, A groove is arranged on the inner wall of the clamping groove, and the groove is recessed in the direction away from the inner wall of the clamping groove, and the groove contacts with the rubber part to increase the friction.

6. The novel valve body assembly of claim 1, wherein The contact area of the rubber part with the valve seat: the contact area of the matching part with the valve seat = 66.6%:33.4%.

7. The novel valve body assembly of claim 1, wherein The contact area of the rubber part with the valve seat: the contact area of the matching part with the valve seat = 33.4%:66.6%.

8. The novel valve body assembly of claim 1, wherein, The clamping groove is an annular groove arranged around the axis of the valve body, and the rubber part is an annular structure.

9. A plunger pump for fracturing operations in oil and gas fields, characterized in that, The valve seat and the new valve body assembly of any one of claims 1-8 are included.

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