Hydraulic injection pump high-pressure fluid end suitable for complex media

Abstract

The utility model discloses a hydraulic injection pump high-pressure fluid end suitable for complex media, and relates to the technical field of petroleum drilling and production equipment, a valve box comprises a box body, and one end of the box body is provided with a slurry inlet plug, a slurry inlet connector and a slurry inlet valve assembly; the other end of the box body is connected with one end of a cylinder sleeve, and a piston assembly is arranged at the other end of the cylinder sleeve; a slurry outlet valve assembly is arranged in the vertical section of the box body, and a slurry outlet plug is arranged above the slurry outlet valve assembly; a low-pressure port of the box body is communicated with a low-pressure manifold; and the high-pressure port of the box body is communicated with the high-pressure manifold. According to the utility model, the valve box lower space in the valve box is utilized, the valve box is connected to the bottom, the valve box is fixed by the mounting holes in the valve box, and a supporting seat structure is omitted, so that the overall structure compactness is improved, the suction manifold is reliable and simple in connection, and the multi-port suction function and the external connection convenience are realized; the high-pressure manifold is small in size, high in loading capacity, low in assembly difficulty and high in precision; and three distributed energy accumulators are adopted, so that the overall layout is reasonable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling equipment, in particular to a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media. Background Art

[0002] The existing triple valve box injection pump has a suction manifold installed at the valve box suction port, outside the external valve box; the discharge manifold is installed on the plane of the triple valve box, and the manifold is fixed to the valve box using three sets of planes and bolts. The discharge manifold is forged as a whole and then formed after complex processing such as boring machines and lathes. At the same time, a single large accumulator is installed at one end of the manifold to buffer the system pressure fluctuations and outlet stability of the discharge.

[0003] The patent with the publication number CN115929618A discloses a hydraulic end of a high-pressure plunger pump, including a valve box, a combination flange, a packing box flange, a side end cover, a plunger, a packing box assembly, a fixing piece and an upper end cover; the combination flange and the packing box flange are detachably mounted on the valve box through the fixing piece, the side end cover and the upper end cover are connected to the combination flange by threads, the packing box assembly is installed in the positioning hole of the valve box and fixed by the packing box flange, and the plunger extends into the valve box through the packing box assembly. After the hydraulic end of this structure has been working for a period of time, the tapered connection between the lower valve body and the valve box is squeezed by the high-pressure fluid and is difficult to remove. It is necessary to remove the valve body on the upper end cover, and then use a special tool to penetrate from the upper end of the valve box and rely on the hydraulic principle or the screw to pull the valve body to separate it from the valve box.

[0004] A Chinese patent application with publication number CN114776551A discloses a multi-cylinder, high-flow, high-pressure mud pump in which the suction high-pressure valve assembly and the discharge high-pressure valve assembly are staggered by a certain distance, and the opening and closing of the suction high-pressure valve assembly and the discharge high-pressure valve assembly both have moving trajectories in the up and down directions. However, in this patent application, the valve box is relatively large and uses a lot of materials. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media, and arranges the slurry inlet valve assembly horizontally, thereby reducing the volume of the valve box and the amount of material used.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media, comprising a valve box, a high-pressure manifold and a low-pressure manifold; the valve box comprises a box body; a slurry inlet valve assembly is arranged at a horizontal section of the box body; a low-pressure port is arranged at a horizontal section of the box body, and the outlet end of the low-pressure manifold is connected with the low-pressure port; the inflow side of the slurry inlet valve assembly is connected with the low-pressure port; the valve body in the slurry inlet valve assembly has an opening and closing motion track extending in the horizontal direction; a slurry outlet valve assembly is arranged in a vertical section of the box body; a high-pressure port is arranged on a side wall of the vertical section of the box body, and the inflow side of the slurry outlet valve assembly is connected with the outflow side of the slurry inlet valve assembly; the high-pressure port is connected with the outflow side of the slurry outlet valve assembly, and the inlet of the high-pressure manifold is connected with the high-pressure port.

[0008] Optionally, a slurry inlet plug and a slurry inlet conduction are also provided in the horizontal section of the box body; the slurry inlet plug, the slurry inlet conduction and the slurry inlet valve assembly are arranged in sequence from the outside to the inside of the valve box; the slurry inlet plug is threadedly connected to the box body.

[0009] Optionally, the slurry inlet conduction has an inner hole extending in a horizontal direction, and is provided with a plurality of connecting holes penetrating the side wall of the slurry inlet conduction; the low-pressure port is arranged on the bottom surface of the box body, and the low-pressure port is connected with the inlet side of the slurry inlet valve assembly through the connecting holes and the inner hole of the slurry inlet conduction.

[0010] Optionally, the horizontal section of the box body is connected to the cylinder liner; it also includes a cylinder liner cover, which is threadedly connected to the box body; the outer wall surface of the cylinder liner is provided with a radial protrusion, and one end of the cylinder liner cover facing the box body abuts against the radial protrusion.

[0011] Optionally, the high-pressure manifold includes a high-pressure outlet pipe, on which a plurality of joints are provided, and the plurality of joints are used to be connected to the accumulator. The high-pressure outlet pipe is also provided with a plurality of pump outlet flanges, and the plurality of pump outlet flanges are used to be connected to the outlet of the valve box.

[0012] Optionally, one end of the high-pressure outlet pipe is connected to one end of the L-shaped elbow, the other end of the L-shaped elbow is connected to the first interface of the T-shaped joint, the second interface of the T-shaped joint is provided with a pressure gauge, and the third interface of the T-shaped joint is provided with a high-pressure stopcock and a vent pipe assembly in sequence.

[0013] Optionally, the other end of the high-pressure outlet pipe is connected to the high-pressure hard pipe through a 90° high-pressure elbow.

[0014] Optionally, the low-pressure manifold includes a suction pipeline, one end of which is provided with a blind flange, the other end of which is provided with a suction conversion joint, one side of the suction pipeline is connected to one end of a connecting elbow, the other end of the connecting elbow is provided with a connecting flange, and the connecting flange is used to connect to the outer shell of the valve box.

[0015] Optionally, a sealing gasket is provided between the other end of the suction pipeline and the suction conversion joint.

[0016] Optionally, a mounting flange is provided at the bottom of the suction pipeline, the mounting flange is connected to a pipe support via a second bolt and a nut, the bottom of the pipe support is connected to a foundation, and the pipe support is used to support the suction pipeline.

[0017] Compared with the prior art, the utility model has achieved the following technical effects:

[0018] The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media in the utility model utilizes the lower space of the valve box in the valve box to connect it to the bottom, and is fixed by the mounting holes on the valve box, eliminating the support seat structure, thereby improving the compactness of the overall structure, and the suction manifold connection is reliable and simple, with multi-port suction function and external connection convenience; the high-pressure manifold is small in size, high in pressure bearing capacity, and low in assembly difficulty and precision; three distributed accumulators are used, and the overall layout is reasonable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the high-pressure hydraulic end of the hydraulic injection pump suitable for complex media of the utility model;

[0021] Figure 2 It is a schematic cross-sectional structure diagram of a valve box in a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media according to the utility model;

[0022] Figure 3 It is a schematic diagram of the top view of the high-pressure manifold at the high-pressure hydraulic end of the hydraulic injection pump suitable for complex media of the utility model;

[0023] Figure 4 This is a structural schematic diagram of a medium- and high-pressure manifold at a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media according to the utility model;

[0024] Figure 5This is a schematic diagram of the connection structure between the medium and low pressure manifolds and the valve box at the high pressure hydraulic end of the hydraulic injection pump suitable for complex media of the utility model;

[0025] Figure 6 The utility model is a structural schematic diagram of a medium and low pressure manifold at the high pressure hydraulic end of a hydraulic injection pump suitable for complex media.

[0026] Description of reference numerals: 01, high-pressure manifold; 02, low-pressure manifold; 03, valve box;

[0027] 1. Vent pipe assembly; 2. High-pressure plug valve; 3. T-type joint; 4. Pressure gauge; 5. L-type elbow; 6. High-pressure outlet pipe; 7. Pump outlet flange; 8. 90° high-pressure elbow; 9. High-pressure hard pipe; 10. Accumulator; 11. Joint; 12. First bolt; 13. O-ring; 17. Suction pipeline; 18. Sealing pad; 19. Suction conversion joint;

[0028] A1, housing; A2, slurry inlet plug; A3, slurry inlet conduction; A4, slurry inlet valve assembly; A5, slurry outlet valve assembly; A6, cylinder liner gland; A7, cylinder liner; A8, piston assembly; A9, cylinder liner sealing ring; A10, valve cover sealing ring; A11, slurry outlet plug; A12, lifting eye screw; A13, transition joint; A14, clamp assembly; A15, radial protrusion. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figures 1 to 6 As shown, this embodiment provides a high-pressure hydraulic end of a hydraulic injection pump suitable for complex media, including a valve box 03, a high-pressure manifold 01 and a low-pressure manifold 02.

[0031] The valve box 03 includes a box body A1, which is a T-shaped structure. The box body A1 includes a horizontal section and a vertical section. The inner cavity of the horizontal section is connected to the inner cavity of the vertical section.

[0032] One end of the horizontal section of the box body A1 is provided with a slurry inlet plug A2, a slurry inlet guide A3 and a slurry inlet valve assembly A4 in sequence from outside to inside.

[0033] The other end of the horizontal section of the box body A1 is connected to the cylinder sleeve A7. The piston assembly A8 is installed in the cylinder sleeve A7, and the piston assembly A8 is slidably and sealedly connected to the cylinder sleeve A7.

[0034] A slurry discharge valve assembly A5 is arranged in the vertical section of the box body A1, and a slurry discharge plug A11 is arranged above the slurry discharge valve assembly A5; a low-pressure port is arranged at the bottom of the horizontal section of the box body A1, the low-pressure port is connected with the slurry inlet conduction A3, and the outlet end of the low-pressure manifold 02 is connected with the low-pressure port; a high-pressure port is arranged on the side wall of the vertical section of the box body A1, the high-pressure port is connected with the slurry discharge valve assembly A5, and the inlet of the high-pressure manifold 01 is connected with the high-pressure port.

[0035] In this specific embodiment, a cylinder liner gland A6 is provided between the cylinder liner A7 and the housing A1. The cylinder liner gland A6 is mainly used to fix and press the cylinder liner A7 onto the valve housing 03, and at the same time, through the positioning function of the cylinder liner A7, ensure the coaxiality with other components.

[0036] The outer wall surface of the cylinder liner A7 is provided with a radial protrusion, the end of the cylinder liner gland A6 facing the box body A1 abuts against A15, and the end of the cylinder liner gland A6 facing the piston assembly A8 is provided with a clamp assembly A14. The clamp assembly A14 can prevent the cylinder liner gland A6 from loosening.

[0037] A transition joint A13 is provided on the other side wall of the horizontal section of the box body A1. When the cylinder liner seal is damaged, the transition joint A13 can immediately serve as a warning to prevent leakage from the valve box sealing surface.

[0038] A cylinder liner sealing ring A9 is provided between the end of the cylinder liner A7 and the box body A1; the cylinder liner sealing ring A9 is used for medium sealing.

[0039] A valve cover sealing ring A10 is provided between the slurry inlet plug A2 and the slurry inlet conduction A3; the valve cover sealing ring A10 is used for medium sealing.

[0040] A lifting screw A12 is provided on the top of the slurry discharge valve assembly A5, and the lifting screw A12 extends into the slurry discharge plug A11. The lifting screw A12 is used to assist in lifting and removing the slurry discharge valve assembly A5.

[0041] When the piston assembly A8 moves away from the box body A1, the pressure in the cylinder sleeve A7 decreases, the slurry inlet valve assembly A4 opens, and the liquid in the low-pressure manifold 02 is sucked into the cylinder sleeve A7. When the piston assembly A8 moves toward the box body A1, the slurry inlet valve assembly A4 closes, the pressure in the cylinder sleeve A7 increases, the slurry outlet valve assembly A5 opens, and the liquid in the cylinder sleeve A7 is pressed into the discharge manifold 4.

[0042] The inlet valve assembly A4 is set to be installed horizontally, and is completely independent during maintenance or replacement of accessories. Especially when the equipment is running, the inlet valve assembly A4 is subjected to greater force than the outlet valve assembly A5, and the maintenance frequency is relatively high. By installing the inlet valve assembly A4 horizontally, the maintenance convenience is improved, and the inlet valve assembly A4 can be placed as close to the cylinder sleeve A7 as possible, which can minimize the width of the valve box 03, and reduce the weight and volume of the valve box 03.

[0043] One end of the high-pressure outlet pipe 6 is connected to one end of the L-shaped elbow 5, the other end of the L-shaped elbow 5 is connected to the first interface of the T-shaped joint 3, the second interface of the T-shaped joint 3 is provided with a pressure gauge 4, and the third interface of the T-shaped joint 3 is provided with a high-pressure stopcock 2 and a venting pipe assembly 1 in sequence. The other end of the high-pressure outlet pipe 6 is connected to the high-pressure hard pipe 9 through a 90° high-pressure elbow 8.

[0044] The low-pressure manifold 02 includes a suction pipe 17, one end of which is provided with a blind flange, the other end of which is provided with a suction conversion joint 19, and a sealing gasket 18 is provided between the other end of the suction pipe 17 and the suction conversion joint 19. One side of the suction pipe 17 is connected to one end of a connecting elbow, and the other end of the connecting elbow is provided with a connecting flange, which is used to connect to the outer shell of the valve box 03.

[0045] In the utility model, the low-pressure suction manifold utilizes the lower space of the valve box in the valve box 03 to connect it to the bottom and fix it with the mounting hole on the valve box. Specifically, the bottom of the valve box 03 is provided with a threaded hole, and the low-pressure manifold 02 is installed on the bottom of the valve box 03 through the first bolt 12 and the O-ring 13, eliminating the support seat structure and improving the compactness of the overall structure. The external connection adopts an 8-inch rotary quick connection, which is convenient and reliable. At the same time, multiple suction ports are added to ensure the convenience of connecting the external liquid tank.

[0046] The high-pressure discharge manifold adopts a 3-inch structure and a square body. While ensuring the pressure, the size is greatly reduced. It is connected to the valve box assembly with a steel ring flange and a union. The connection is reliable, making full use of the L-shaped area on the upper part of the valve box, occupying a small volume, and in order to ensure the reliability of the overall accessories, a high-pressure active elbow is used to connect the external manifolds, with a high safety factor. According to the displacement, three sets of accumulators 10 are installed to stabilize the flow and fluctuation effect during high-pressure discharge. At the same time, a plug valve and a pressure gauge 4 assembly are equipped at one end, and the plug valve is externally connected to the vent pipe assembly 1 for emptying. The pressure gauge 4 assembly is used to display the outlet pressure in real time. When the manifold is connected to the valve box, a union welding and point-to-point form are adopted, which greatly reduces the installation benchmark and assembly difficulty of the valve box.

[0047] During installation, connect the welding diameter flange to the valve box, connect the union to the welding diameter flange in advance, roughly adjust the position of valve box 03, point the union and the discharge manifold, and perform on-site welding, which solves the problem of complex installation of large forging structures.

[0048] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0049] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A high-pressure hydraulic end of a hydraulic injection pump suitable for complex media, characterized in that: It includes a valve box, a high-pressure manifold and a low-pressure manifold; the valve box includes a box body; The horizontal section of the box body is provided with a slurry inlet valve assembly; the horizontal section of the box body is provided with a low-pressure port, and the outlet end of the low-pressure manifold is connected to the low-pressure port; the inlet side of the slurry inlet valve assembly is connected to the low-pressure port; the valve body in the slurry inlet valve assembly has an opening and closing motion track extending in the horizontal direction; A slurry discharge valve assembly is arranged in the vertical section of the box body; a high-pressure port is arranged on the side wall of the vertical section of the box body, and the inflow side of the slurry discharge valve assembly is connected with the outflow side of the slurry inlet valve assembly; The high-pressure port is communicated with the outflow side of the slurry discharge valve assembly, and the inlet of the high-pressure manifold is communicated with the high-pressure port.

2. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 1, characterized in that: A slurry inlet plug and a slurry inlet guide are also provided in the horizontal section of the box body; the slurry inlet plug, the slurry inlet guide and the slurry inlet valve assembly are arranged in sequence from the outside to the inside of the valve box; the slurry inlet plug is threadedly connected to the box body.

3. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 2, characterized in that: The slurry inlet conduction has an inner hole extending in a horizontal direction, and the slurry inlet conduction is provided with a plurality of connection holes penetrating through the side wall of the slurry inlet conduction; The low-pressure port is arranged on the bottom surface of the box body, and the low-pressure port is communicated with the inflow side of the slurry inlet valve assembly through the connecting hole and the inner hole of the slurry inlet conduction.

4. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 3, characterized in that: The horizontal section of the box is connected to the cylinder sleeve; It also includes a cylinder liner gland, which is threadedly connected to the box body; A radial protrusion is provided on the outer wall surface of the cylinder liner, and one end of the cylinder liner gland facing the box body abuts against the radial protrusion.

5. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 1, characterized in that: The high-pressure manifold includes a high-pressure outlet pipe, on which a plurality of joints are provided, and the plurality of joints are used to be connected to the accumulator. The high-pressure outlet pipe is also provided with a plurality of pump outlet flanges, and the plurality of pump outlet flanges are used to be connected to the outlet of the valve box.

6. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 5, characterized in that: One end of the high-pressure outlet pipe is connected to one end of the L-shaped elbow, the other end of the L-shaped elbow is connected to the first interface of the T-shaped joint, the second interface of the T-shaped joint is provided with a pressure gauge, and the third interface of the T-shaped joint is provided with a high-pressure stopcock and a vent pipe assembly in sequence.

7. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 6, characterized in that: The other end of the high-pressure outlet pipe is connected to the high-pressure hard pipe through a 90° high-pressure elbow.

8. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 1, characterized in that: The low-pressure manifold includes a suction pipeline, one end of which is provided with a blind flange, the other end of which is provided with a suction conversion joint, one side of the suction pipeline is connected to one end of a connecting elbow, the other end of the connecting elbow is provided with a connecting flange, and the connecting flange is used to be connected to the outer shell of the valve box.

9. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 8, characterized in that: A sealing gasket is arranged between the other end of the suction pipeline and the suction conversion joint.

10. The high-pressure hydraulic end of the hydraulic injection pump suitable for complex media according to claim 8, characterized in that: A mounting flange is provided at the bottom of the suction pipeline, and the mounting flange is connected to the pipe support through a second bolt and a nut. The bottom of the pipe support is connected to the foundation, and the pipe support is used to support the suction pipeline.

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