Valve box, fluid end and pump

Abstract

The utility model discloses a valve box, a fluid end and a pump, and relates to the fields of oil gas, mines and the like. A valve housing includes: a plurality of valve housing modules; the valve box modules are arranged in the first direction. Each valve box module is provided with a main channel, a liquid inlet channel and a liquid drainage channel, the main channel extends in the second direction and is used for containing a valve seat, a valve assembly and a plunger of the fluid end in the second direction, the liquid drainage channel extends in the third direction, and the main channel communicates with the liquid drainage channel and the liquid inlet channel. The problems that an integral valve box is large in maintenance or replacement difficulty, high in cost and the like can be solved.

Description

Technical Field

[0001] This application belongs to the technical fields of oil and gas, mining, etc., and specifically relates to a valve box, hydraulic end and pump. Background Technology

[0002] In related technologies, some hydraulic terminals adopt an integral valve box structure, and there are intersecting lines between the valve cavity and the inlet and outlet channels. Stress concentration is prone to occur at the intersection line, which makes the valve box prone to cracking at the intersection line and reducing the service life of the valve box. In addition, with the long-term operation of the hydraulic terminal, the high-pressure fracturing fluid will cause erosion at the intersection line of the valve box, thus requiring the valve box to be repaired or replaced.

[0003] However, due to the use of an integrated valve box, the entire valve box needs to be repaired or replaced, which not only increases the difficulty of repair or replacement, but also increases the cost. Utility Model Content

[0004] The purpose of this application is to provide a valve box, hydraulic end, and pump that can solve the problems of high difficulty and cost in repairing or replacing integral valve boxes.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] This application provides a valve box, including: multiple valve box modules;

[0007] Multiple valve box modules are arranged along a first direction;

[0008] Each valve box module is provided with a main channel, an inlet channel and an outlet channel. The main channel extends along a second direction and is used to accommodate a valve seat, valve assembly and plunger of the hydraulic end in the second direction. The outlet channel extends along a third direction, and the main channel is connected to the outlet channel and the inlet channel respectively.

[0009] This application embodiment also provides a hydraulic end, including a manifold and the above-mentioned valve box;

[0010] The manifold block is provided with a manifold channel, and the drainage channels of the plurality of valve box modules are respectively connected to the manifold channel.

[0011] This application also provides a pump, including the hydraulic end described above.

[0012] The valve box in this embodiment adopts a combination of multiple valve box modules, replacing the integral valve box in related technologies. In this way, when a local area of ​​the valve box is damaged, the valve box module can be repaired or replaced individually, without the need to repair or replace the entire valve box, thereby reducing the difficulty and cost of repair or replacement. In addition, each valve box module is provided with a main channel, an inlet channel and a drain channel, so that during the reciprocating motion of the plunger, fluid can flow into the main channel through the inlet channel and be pressurized in the main channel. The pressurized fluid is discharged through the drain channel. Furthermore, the drain channel extends in a third direction so that the fluid can be discharged in a third direction. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the valve box disclosed in the embodiments of this application;

[0014] Figure 2 This is a schematic cross-sectional view of the first type of hydraulic end disclosed in the embodiments of this application;

[0015] Figure 3 This is a longitudinal cross-sectional schematic diagram of the first type of hydraulic end disclosed in the embodiments of this application;

[0016] Figure 4 This is a cross-sectional schematic diagram of the current collector disclosed in the embodiments of this application;

[0017] Figure 5 This is a schematic cross-sectional view of the second type of hydraulic end disclosed in the embodiments of this application;

[0018] Figure 6 This is a schematic cross-sectional view of the third type of hydraulic end disclosed in the embodiments of this application;

[0019] Figure 7 for Figure 5 A schematic diagram of the cross section along the middle AA or Figure 6 A cross-sectional view of the middle section BB.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10 - Valve box; 10a - Valve box module;

[0022] 11-Main channel; 11a-High pressure chamber; 11b-Low pressure chamber; 11c-Alternating chamber;

[0023] 12-Drainage channel;

[0024] 13-Inlet channel;

[0025] 20-Catcher Block;

[0026] 21-Collection channel; 211-Drain outlet; 22-Diversion channel;

[0027] 30 - Bushing; 40 - Fastener; 50 - Seal. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0031] refer to Figures 1 to 7 This application discloses a valve box 10, which includes multiple valve box modules 10a arranged along a first direction. Each valve box module 10a has a main channel 11, an inlet channel 13, and a drain channel 12. The main channel 11 extends along a second direction and is used to accommodate hydraulic components such as valve seats, valve assemblies, and plungers in the second direction. The drain channel 12 extends along a third direction, and the main channel 11 is connected to the inlet channel 13 and the drain channel 12, respectively.

[0032] Based on the above configuration, the valve box 10 in this embodiment adopts a combination of multiple valve box modules 10a, replacing the integral valve box 10 in the related technology. In this way, when a local area of ​​the valve box 10 is damaged, the valve box module 10a can be repaired or replaced separately without repairing or replacing the entire valve box 10, thereby reducing the difficulty and cost of repair or replacement. In addition, each valve box module 10a is provided with a main channel 11, an inlet channel 13 and an outlet channel 12, so that during the reciprocating motion of the plunger, the fluid can flow into the main channel 11 through the inlet channel 13 and be pressurized in the main channel 11. The pressurized fluid is discharged through the outlet channel 12. Furthermore, the outlet channel 12 extends in a third direction so that the fluid can be discharged in a third direction.

[0033] Optionally, the main channel 11 can be used to accommodate components such as a plunger, valve seat, inlet valve assembly, and outlet valve assembly, so that fluid can be periodically drawn in, pressurized, and discharged during the reciprocating movement of the plunger.

[0034] Optionally, the first direction, the second direction, and the third direction can be mutually perpendicular. For example, the first direction is the front-back direction, the second direction is the left-right direction, and the third direction is the up-down direction, in which case drainage can be carried out along the up-down direction. Of course, the first direction, the second direction, and the third direction are not necessarily mutually perpendicular. For example, the first direction is the front-back direction, the second direction is the left-right direction, and the third direction is parallel to the first direction, in which case drainage can be carried out from the side. In addition, the first direction, the second direction, and the third direction can also have other distribution patterns, which are not specifically limited here.

[0035] refer to Figure 1 In some embodiments, the main channel 11 may include a high-pressure chamber 11a, a low-pressure chamber 11b, and an alternating chamber 11c connected sequentially along a second direction. The alternating chamber 11c is used to move the plunger in or out so that the plunger can reciprocate relative to the valve box 10. The low-pressure chamber 11b is a fluid intake chamber. During the process of the plunger moving out relative to the alternating chamber 11c, external fluid can be drawn into the low-pressure chamber 11b. The fluid in the low-pressure chamber 11b can flow into the alternating chamber 11c and be pressurized by the movement of the plunger. The high-pressure chamber 11a is a fluid discharge chamber. The fluid pressurized by the plunger can flow into the high-pressure chamber 11a through the alternating chamber 11c and finally be discharged through the high-pressure chamber 11a.

[0036] In addition, the inlet channel 13 is connected to the low-pressure chamber 11b so that the fluid can be transported to the low-pressure chamber 11b through the inlet channel 13 to realize the intake of the fluid; the outlet channel 12 is connected to the high-pressure chamber 11a so that the pressurized fluid in the high-pressure chamber 11a can be discharged to the outside of the valve box 10 through the outlet channel 12.

[0037] Furthermore, along the second direction, the inlet channel 13 is located on the side of the outlet channel 12 near the alternating chamber 11c, so that it can be adapted to the arrangement of the low-pressure chamber 11b and the high-pressure chamber 11a, thereby making the intake and discharge of fluid smoother.

[0038] In some embodiments, the extension direction of the liquid inlet channel 13 is deviated from the third direction, that is, the extension direction of the liquid inlet channel 13 can form a certain angle with the third direction, so that the liquid inlet channel 13 can extend at an angle, thereby realizing the inclined inflow of fluid, changing the flow direction of fluid entering the low-pressure chamber 11b, which can reduce the inflow resistance of fluid to a certain extent and promote the smoothness of fluid flow.

[0039] Optionally, the angle between the extension direction of the liquid inlet channel 13 and a third direction can be from 30° to 75°, such as 30°, 45°, 60°, 75°, etc. Of course, it can also be other degrees, which are not specifically limited here.

[0040] Furthermore, the inlet channel 13 extends obliquely along a third direction and toward the side closer to the alternating cavity 11c. Based on this, since the outlet channel 12 is located on the side of the inlet channel 13 away from the alternating cavity 11c, the inlet channel 13 can tend to deviate from the outlet channel 12, thereby increasing the space between the inlet channel 13 and the outlet channel 12 to prevent interference between the inlet channel 13 and the outlet channel 12.

[0041] It should be noted that the third direction can be in a vertical plane, a horizontal plane, or other planes, depending on the actual needs.

[0042] In some embodiments, each valve box module 10a may include a valve box portion and a packing box portion. The valve box portion and the packing box portion may be integrally formed, such as... Figure 7 As shown, or a split design can be used, such as... Figure 2 As shown.

[0043] When an integrated design is adopted, the sealing performance of the entire valve box 10 can be guaranteed, and the overall strength of the valve box 10 can be improved. When a split design is adopted, if a part is damaged, the damaged part can be repaired or replaced separately without the need for overall repair or replacement, thus reducing complexity and cost.

[0044] Based on the valve box 10 described above, this application also discloses a hydraulic end, which includes a manifold 20 and the valve box 10 described above.

[0045] The manifold 20 may be provided with a manifold channel 21, and the drain channels 12 of multiple valve box modules 10a are respectively connected to the manifold channel 21. In this way, the pressurized fluid flows into the manifold channel 21 through the drain channel 12 of each valve box module 10a, so that the collected fluid is discharged to the outside through the manifold channel 21.

[0046] Optionally, the collection channel 21 extends along a first direction and has a drain port 211 at at least one end in the first direction, so that the pressurized fluid can be discharged through the drain port 211 at at least one end in the first direction of the collection channel 21.

[0047] For example, a drain end or other components may be provided at the drain port 211. The drain end can be connected to the end of the manifold 20 by means of a flange, so that the manifold 20 can be connected to other drain pipes through the drain end, thereby delivering the pressurized fluid to the required location.

[0048] refer to Figure 3 In some embodiments, the flow collection block 20 may also be provided with multiple flow distribution channels 22, which are arranged along the first direction, and each flow distribution channel 22 is connected to the corresponding drainage channel 12 and flow collection channel 21, such that one end of each of the multiple flow distribution channels 22 is connected to the flow collection channel 21, and the other end of each of the multiple flow distribution channels 22 is connected to the drainage channel 12 of the multiple valve box modules 10a respectively.

[0049] Based on the above configuration, multiple diversion channels 22 can be used to receive pressurized fluids (such as fracturing fluids) discharged from multiple valve box modules 10a, and the fluids received by each diversion channel 22 can be transported to the collection channel 21 to collect the fluids and discharge them. In this way, the collection block 20 can withstand the pressure and erosion of the fluids.

[0050] Compared to the method in related technologies where the inner wall of the valve box 10 is subjected to fluid pressure and erosion, the embodiments of this application can change the object of fluid fracturing and erosion, and can repair or replace the manifold 20 separately when it is eroded or punctured, thus eliminating the need to repair or replace the entire valve box 10, thereby reducing the difficulty and cost of repair or replacement.

[0051] refer to Figure 3 In some embodiments, the hydraulic end may also include a plurality of bushings 30, each bushing 30 being disposed at the junction of the corresponding drain channel 12 and the diversion channel 22, and the inner cavity of the bushing 30 being connected to the drain channel 12 and the diversion channel 22.

[0052] Based on the above configuration, a stable connection between the valve box 10 and the manifold 20 can be achieved through multiple bushings 30. Furthermore, the bushings 30 can also shield and seal the joints between the corresponding drain channels 12 and the diversion channels 22, thereby effectively preventing fluid from impacting the joints and thus effectively alleviating problems such as erosion and leakage at the joints between the corresponding drain channels 12 and the diversion channels 22.

[0053] Furthermore, the corresponding drainage channel 12 and diversion channel 22 can each be provided with an installation groove on the inner wall near the docking point. The two ends of the bushing 30 are respectively embedded in the installation groove of the corresponding drainage channel 12 and the installation groove of the diversion channel 22, and the cavity wall of the bushing 30 smoothly transitions with the inner wall of the corresponding drainage channel 12, i.e. the inner wall of the diversion channel 22.

[0054] Based on the above configuration, the end of the bushing 30 can be accommodated by the mounting groove, thereby effectively preventing the bushing 30 from occupying the space within the drain channel 12 and the diversion channel 22. This ensures that the cross-sectional area of ​​the drain channel 12 and the diversion channel 22 at the area where the bushing 30 is installed will not decrease, guaranteeing that the fluid flows at its maximum flow rate in the drain channel 12 and the diversion channel 22, and improving the smoothness of fluid flow. In addition, the bushing 30 achieves a stable and reliable connection between the corresponding drain channel 12 and the diversion channel 22, and also helps to improve the sealing performance at the connection between the manifold 20 and the valve box 10.

[0055] Continue to refer to Figure 3 In some embodiments, the hydraulic end may further include a seal 50, which is respectively sealed between the bushing 30 and the drain channel 12, and between the bushing 30 and the diversion channel 22. Based on this, the sealing effect of the seal 50 can effectively alleviate the problem of fluid leakage caused by poor sealing between the bushing 30 and the drain channel 12, and between the bushing 30 and the diversion channel 22.

[0056] Optionally, at least one of the bottom wall of the mounting groove and the outer wall of the bushing 30 is provided with an annular groove extending in the circumferential direction, and at least a portion of the seal 50 is provided in the annular groove, thereby achieving a good seal between the outer wall of the bushing 30 and the bottom wall of the mounting groove.

[0057] In some embodiments, the hydraulic end may also include a plurality of fasteners 40, which fasten the manifold 20 and the valve box 10.

[0058] Optionally, the manifold 20 may be provided with multiple first mounting holes, and correspondingly, the valve box 10 may be provided with multiple second mounting holes. When installing the manifold 20, the manifold 20 is hoisted onto the valve box 10, and the first mounting holes are aligned with the second mounting holes. Fasteners 40 are then inserted into the aligned first and second mounting holes to achieve a tight installation of the manifold 20 and ensure the installation stability of the manifold 20.

[0059] For example, the first mounting hole can be a smooth hole, the second mounting hole can be a threaded hole, and the fastener 40 can be a bolt or screw.

[0060] In other embodiments, the hydraulic end may also include a plurality of fasteners 40 and a plurality of clamps, wherein the plurality of clamps are respectively sleeved on the outside of the manifold 20, and the plurality of fasteners 40 respectively fix the plurality of clamps to the valve box 10.

[0061] Optionally, multiple clamps can be arranged at intervals along the first direction to tighten different positions of the collector block 20, thereby making the force on the collector block 20 more balanced and improving the installation stability of the collector block 20.

[0062] In addition, each clamp can be provided with a third mounting hole, and the valve box 10 can be provided with a second mounting hole. When installing the manifold 20, the manifold 20 is hoisted onto the valve box 10, and multiple clamps are respectively arranged on the outside of the manifold 20 along the first direction, with the third mounting hole aligned with the second mounting hole. Fasteners 40 are inserted into the aligned third and second mounting holes, thereby achieving the tight installation of each clamp and ensuring the installation stability of the manifold 20 by clamping the manifold 20 with multiple clamps.

[0063] Based on the aforementioned hydraulic end, this application also discloses a pump, which includes the aforementioned hydraulic end.

[0064] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A valve box, characterized in that, include: Multiple valve box modules (10a); Multiple valve box modules (10a) are arranged along a first direction; Each valve box module (10a) is provided with a main channel (11), an inlet channel (13) and a drain channel (12). The main channel (11) extends in a second direction to accommodate a valve seat, valve assembly and plunger of the hydraulic end in the second direction. The drain channel (12) extends in a third direction. The main channel (11) is connected to the drain channel (12) and the inlet channel (13) respectively.

2. The valve box according to claim 1, characterized in that, The main channel (11) includes a high-pressure chamber (11a), a low-pressure chamber (11b), and an alternating chamber (11c) that are connected sequentially along the second direction. The drain channel (12) is connected to the high-pressure chamber (11a); Along the second direction, the liquid inlet channel (13) is located on the side of the liquid outlet channel (12) near the alternating chamber (11c), and the liquid inlet channel (13) is connected to the low-pressure chamber (11b); The alternating cavity (11c) is used to move the plunger in or out.

3. The valve box according to claim 2, characterized in that, The extension direction of the liquid inlet channel (13) is deviated from the third direction.

4. The valve box according to claim 3, characterized in that, The liquid inlet channel (13) extends obliquely along the third direction and toward the side close to the alternating cavity (11c).

5. The valve box according to claim 1, characterized in that, Each valve box module (10a) includes a valve box portion and a packing box portion, wherein the valve box portion and the packing box portion are integrally disposed or separately disposed.

6. A hydraulic end, characterized in that, include: The manifold (20) and the valve box (10) as described in any one of claims 1 to 5; The manifold (20) is provided with a manifold channel (21), and the drain channels (12) of the plurality of valve box modules (10a) are respectively connected to the manifold channel (21).

7. The hydraulic end according to claim 6, characterized in that, The collection channel (21) extends along the first direction and has a drain outlet (211) at at least one end in the first direction.

8. The hydraulic end according to claim 6, characterized in that, The collector block (20) is also provided with multiple diversion channels (22), and the multiple diversion channels (22) are arranged along the first direction; Each of the diversion channels (22) is connected to the corresponding drainage channel (12) and the collection channel (21).

9. The hydraulic end according to claim 8, characterized in that, The hydraulic end also includes a plurality of bushings (30), each bushing (30) being disposed at the junction of the corresponding drain channel (12) and the diversion channel (22), and the inner cavity of the bushing (30) is connected to the drain channel (12) and the diversion channel (22).

10. The hydraulic end according to claim 9, characterized in that, The hydraulic end also includes a sealing element (50), which is respectively sealed between the bushing (30) and the drain channel (12), and between the bushing (30) and the diversion channel (22).

11. The hydraulic end according to claim 6, characterized in that, The hydraulic end also includes a plurality of fasteners (40), which fasten the manifold (20) and the valve box (10) together.

12. A pump, characterized in that, Includes the hydraulic end as described in any one of claims 6 to 11.

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