High-power seven-cylinder fracturing pump shell and fracturing pump

Abstract

The invention discloses a high-power seven-cylinder fracturing pump shell and a fracturing pump in the technical field of fracturing pumps, and aims to solve the problems that in the prior art, the requirements of high pressure and large displacement of a construction site are difficult to meet, and the stability of the whole structure of the fracturing pump is poor. The pump shell comprises a pump shell body, the pump shell body comprises two side bearing seats, the side walls of the two side bearing seats are provided with the same upper arc plate and the same lower arc plate, and a rearview hole cover plate and a connecting rod crosshead box body are arranged between the upper arc plate and the lower arc plate; according to the seven-cylinder fracturing pump shell structure type, under the same rotating speed and stroke working conditions, compared with a five-cylinder fracturing pump, the seven-cylinder fracturing pump is higher in displacement, larger in pressure and lower in discharge pulsation, and the requirements for large displacement and high pressure of a well site can be better met; and meanwhile, through cooperation of the multiple reinforcing rib plates, the stability of the overall structure of the device is ensured, and the using effect of the device is ensured.

Description

Technical Field

[0001] This invention relates to a high-power seven-cylinder fracturing pump casing and fracturing pump, belonging to the field of fracturing pump technology. Background Technology

[0002] Fracturing is a widely used production enhancement technology in oil and gas field development. With the booming development of China's shale gas fracturing market, the demand for high-pressure, high-volume continuous fracturing operations is constantly increasing. The pump casing is a key component of the fracturing pump, responsible for load support and power transmission, and is constantly subjected to complex load impacts. Its stability and reliability directly determine the operating condition of the fracturing pump.

[0003] However, traditional three-cylinder or five-cylinder fracturing pumps have limited displacement, and usually require more than a dozen high-power fracturing equipment to meet the high-pressure and high-displacement operation requirements of the construction site. In contrast, my country's shale gas reservoirs are mostly located in mountainous areas, where fracturing equipment is required, the area occupied is large, and site layout is difficult.

[0004] In summary, existing fracturing pumps are insufficient to meet the high-pressure, high-volume demands of construction sites, and their overall structural stability is poor, affecting their practical performance. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-power seven-cylinder fracturing pump casing and fracturing pump. Through the cooperation of side bearing seats and multiple intermediate bearing seats, compared with traditional three-cylinder and five-cylinder pump casings, it adopts an odd-number multi-cylinder design concept, proposing a seven-cylinder fracturing pump casing structure. Under the same speed and stroke conditions, compared with a five-cylinder fracturing pump, the seven-cylinder fracturing pump has a higher displacement, greater pressure, and lower discharge pulsation, better meeting the high-displacement and high-pressure requirements of well sites. Simultaneously, this application uses multiple reinforcing ribs to fix the relative positions of the side bearing seats, intermediate bearing seats, upper arc plate, and lower arc plate as a whole, ensuring the stability of the overall structure and thus ensuring the effectiveness of the application.

[0006] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution: In a first aspect, the present invention provides a high-power seven-cylinder fracturing pump housing, including a pump housing body, the pump housing body including two side bearing seats, the side walls of the two side bearing seats being provided with the same upper arc plate and the same lower arc plate, a rearview hole cover plate and a connecting rod crosshead housing being provided between the upper arc plate and the lower arc plate, the upper arc plate, the lower arc plate, the rearview hole cover plate and the connecting rod crosshead housing cooperating to form an annular cavity, and a plurality of intermediate bearing seats being provided parallel and equidistantly between the upper arc plate and the lower arc plate within the annular cavity; A reinforcing rib group is provided between the side bearing seat and the adjacent intermediate bearing seat, and between two adjacent intermediate bearing seats. The reinforcing rib group includes multiple reinforcing rib plates. Multiple reinforcing rib plates located on one side of the upper arc plate are fixedly connected to the upper arc plate, and multiple reinforcing rib plates located on one side of the lower arc plate are fixedly connected to the lower arc plate.

[0007] Furthermore, the connecting rod crosshead housing includes two sealing plates, which respectively contact the upper arc plate and the lower arc plate. Side plates are symmetrically arranged between the two sealing plates, and the two side plates are respectively located on one side of the two side bearing seats. Multiple intermediate plates are arranged parallel and equidistantly between the two sealing plates, and the multiple intermediate plates are arranged in a one-to-one correspondence with multiple intermediate bearing seats.

[0008] Furthermore, the outer wall of the lower arc plate is uniformly provided with a plurality of first foot plates, and a support rib plate is provided between the first foot plates and the lower arc plate. The bottom end of the side plate is provided with a second foot plate, and a front rib plate is provided between the side plate and the second foot plate.

[0009] Furthermore, the axes of the two side bearing seats and the plurality of intermediate bearing seats are all located on the same horizontal line; The number of intermediate bearing housings is six; Both of the aforementioned side bearing seats are detachably connected to an input mechanism.

[0010] Furthermore, the outer wall of the upper arc plate is provided with lifting lugs, the outer wall of the lower arc plate is provided with an oil return groove, and the outer wall of the oil return groove is provided with multiple oil drain ports.

[0011] Furthermore, the outer wall of the upper arc plate is provided with multiple oil hole flanges.

[0012] Furthermore, the outer walls of the upper arc plate and the two sealing plates are provided with lubricating oil pipes.

[0013] Furthermore, multiple sliding plate groups are provided parallel and equidistantly between the two sealing plates, and the multiple sliding plate groups are staggered with the multiple intermediate plates; The skateboard assembly includes multiple skateboard seats symmetrically arranged on the inner walls of the two sealing plates.

[0014] Furthermore, the side walls of the two sealing plates and the side walls of the two side plates are provided with the same front end plate, and the outer wall of the front end plate is provided with a tie rod mounting hole.

[0015] In a second aspect, the present invention provides a fracturing pump, including the pump casing of the high-power seven-cylinder fracturing pump described in the first aspect.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The high-power seven-cylinder fracturing pump casing, through the cooperation of side bearing seats and multiple intermediate bearing seats, adopts an odd-number multi-cylinder design concept compared with traditional three-cylinder and five-cylinder pump casings, proposing a seven-cylinder fracturing pump casing structure. Under the same speed and stroke conditions, compared with the five-cylinder fracturing pump, the seven-cylinder fracturing pump has a higher displacement, greater pressure, and lower discharge pulsation, which can better meet the needs of well sites for large displacement and high pressure. At the same time, this application uses multiple reinforcing ribs to fix the relative positions between the side bearing seats, intermediate bearing seats, upper arc plate, and lower arc plate as a whole, ensuring the stability of the overall structure of this application and ensuring the performance of this application. 2. The pump casing of this high-power seven-cylinder fracturing pump has input mechanisms on both side bearing seats, which are the input ends of the fracturing pump. Gearboxes can be connected to both input ends to provide power input. During fracturing operations, the operation can be driven by the gearbox assemblies at both ends simultaneously, which meets the high-pressure and large-displacement operating conditions of the fracturing pump. The dual-side input can reduce the crankshaft torque value, which helps to improve the working stability of the fracturing pump and extend its service life. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a high-power seven-cylinder fracturing pump housing provided according to an embodiment of the present invention; Figure 2 This is a side cross-sectional view of the pump casing of a high-power seven-cylinder fracturing pump according to an embodiment of the present invention; Figure 3 This is a top view structural diagram of a high-power seven-cylinder fracturing pump casing provided according to an embodiment of the present invention; Figure 4 This is a rear view structural diagram of a high-power seven-cylinder fracturing pump casing provided in an embodiment of the present invention.

[0018] In the diagram: 1. Upper arc plate; 2. Sealing plate; 3. Oil hole flange; 4. Rear sight hole cover plate; 5. Side bearing seat; 6. Intermediate bearing seat; 7. Oil return groove; 8. Lower arc plate; 9. Side plate; 10. Intermediate plate; 11. Front end plate; 12. Slide plate seat; 13. Front stiffener plate; 14. Second foot plate; 15. Reinforcing stiffener plate; 16. Lifting lug; 17. Lubricating oil pipe; 18. First foot plate; 19. Support leg stiffener plate. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element 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 the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1:

[0022] like Figures 1-4 As shown, the present invention provides a high-power seven-cylinder fracturing pump housing, including a pump housing body. The pump housing body includes two side bearing seats 5. The side walls of the two side bearing seats 5 are provided with the same upper arc plate 1 and the same lower arc plate 8. A rear viewing hole cover plate 4 and a connecting rod crosshead housing are provided between the upper arc plate 1 and the lower arc plate 8. The upper arc plate 1, the lower arc plate 8, the rear viewing hole cover plate 4, and the connecting rod crosshead housing cooperate to form an annular cavity. Multiple intermediate bearing seats 6 are provided parallel and equidistantly between the upper arc plate 1 and the lower arc plate 8 within the annular cavity. Reinforcing rib groups are provided between the side bearing seats 5 and adjacent intermediate bearing seats 6, and between two adjacent intermediate bearing seats 6. The reinforcing rib groups include multiple reinforcing rib plates 15. Multiple reinforcing rib plates 15 located on one side of the upper arc plate 1 are fixedly connected to the upper arc plate 1, and multiple reinforcing rib plates 15 located on one side of the lower arc plate 8 are fixedly connected to the lower arc plate 8. Optionally, the number of reinforcing rib plates 15 is fifty-six.

[0023] The connecting rod crosshead housing includes two sealing plates 2, which are in contact with the upper arc plate 1 and the lower arc plate 8 respectively. Side plates 9 are symmetrically arranged between the two sealing plates 2, and the two side plates 9 are located on one side of the two side bearing seats 5 respectively. Multiple intermediate plates 10 are arranged parallel and equidistantly between the two sealing plates 2, and the multiple intermediate plates 10 are arranged in a one-to-one correspondence with the multiple intermediate bearing seats 6.

[0024] The axes of the two side bearing seats 5 and the multiple intermediate bearing seats 6 are all located on the same horizontal line; there are six intermediate bearing seats 6, which are used to divide the annular cavity into seven cavities, thereby realizing the seven-cylinder structural design; both side bearing seats 5 can be detachably connected to an input mechanism.

[0025] Optionally, the intermediate bearing seat 6 and the side bearing seat 5 are welded and installed between the upper arc plate 1 and the lower arc plate 8, and their axes are on the same horizontal line; a rear sight hole cover plate 4 is installed on the outside of the intermediate bearing seat 6 and the side bearing seat 5 for easy observation and maintenance; the connecting rod crosshead housing includes two side plates 9, multiple intermediate plates 10, and two sealing plates 2 located at the top and bottom, with the multiple intermediate plates 10 placed parallel and equidistantly, for a total of six; multiple sliding plate seats 12 are welded equidistantly inside the six intermediate plates 10; Optionally, the connection method of each structure in the pump housing body and the connecting rod crosshead housing is welding. This application adopts an integral welded structure, which can make the structural strength of the power end assembly higher, the support stability better, effectively reduce the load deformation during operation, reduce the overall vibration of the seven-cylinder fracturing pump, and improve the operating stability of the fracturing pump.

[0026] This application provides input mechanisms (not shown in the figure) on both side bearing seats 5, which are the input ends of the fracturing pump. A gearbox can be connected to each input end to provide power input. During fracturing operations, the operation can be driven simultaneously by the gearbox assemblies at both ends, which meets the high-pressure and high-displacement operating conditions of the fracturing pump. The dual-side input can reduce the crankshaft torque value, which helps to improve the working stability of the fracturing pump and extend its service life.

[0027] This application, through the cooperation of side bearing housing 5 and multiple intermediate bearing housings 6, adopts an odd-number multi-cylinder design concept compared to traditional three-cylinder and five-cylinder pump housings, proposing a seven-cylinder fracturing pump housing structure. Under the same speed and stroke conditions, compared to the five-cylinder fracturing pump, the seven-cylinder fracturing pump has a higher displacement, greater pressure, and lower discharge pulsation, which can better meet the needs of large displacement and high pressure at the well site. At the same time, this application uses multiple reinforcing ribs 15 to fix the relative positions between the side bearing housing 5, intermediate bearing housing 6, upper arc plate 1, and lower arc plate 8 as a whole, ensuring the stability of the overall structure of this application and ensuring the effectiveness of this application.

[0028] In this embodiment, a plurality of first foot plates 18 are uniformly provided on the outer wall of the lower arc plate 8, and a support rib plate 19 is provided between the first foot plate 18 and the lower arc plate 8. A second foot plate 14 is provided at the bottom of the side plate 9, and a front rib plate 13 is provided between the side plate 9 and the second foot plate 14.

[0029] Specifically, the first foot plate 18 is used to support the pump casing body, the support leg stiffener 19 is used to ensure the stability of the first foot plate 18 structure, the second foot plate 14 is used to support the connecting rod crosshead housing, and the front stiffener 13 is used to ensure the stability of the second foot plate 14 structure. The first foot plate 18 and the second foot plate 14 cooperate to achieve stable placement of this application; optionally, the number of support leg stiffeners 19 is eight, the number of second foot plates 14 is two, and the connection between the above structures is welding.

[0030] In this embodiment, the outer wall of the upper arc plate 1 is provided with a lifting lug 16, and the outer wall of the lower arc plate 8 is provided with an oil return groove 7. The outer wall of the oil return groove 7 is provided with multiple oil drain ports. Optionally, there are two lifting lugs 16, which are respectively located on the top two sides of the upper arc plate 1. The pump housing body can be moved by the lifting lugs 16. Optionally, the top of the upper sealing plate 2 is provided with two lifting lugs 16, which are used to move the connecting rod crosshead housing. The oil return groove 7 can collect the oil inside the lower arc plate 8. The oil accumulated in the oil return groove 7 can be taken out through the oil drain ports. Optionally, a baffle is provided inside the oil drain ports.

[0031] In this embodiment, the outer wall of the upper arc plate 1 is provided with multiple oil hole flanges 3. The oil hole flanges 3 are installed by welding, and there are seven of them. Maintenance work can be carried out through the oil hole flanges 3.

[0032] In this embodiment, the outer walls of the upper arc plate 1 and the two sealing plates 2 are provided with lubricating oil pipes 17. The total number of lubricating oil pipes 17 is three. The lubricating oil pipes 17 can be used to lubricate the crosshead and crankshaft through external lubrication pipes.

[0033] like Figure 2As shown, in this embodiment, multiple sliding plate groups are arranged parallel and equidistantly between the two sealing plates 2, and the multiple sliding plate groups are staggered with the multiple intermediate plates 10; the sliding plate group includes multiple sliding plate seats 12 symmetrically arranged on the inner walls of the two sealing plates 2, and the side walls of the two sealing plates 2 and the two side plates 9 are provided with the same front end plate 11, and the outer wall of the front end plate 11 is provided with a tie rod mounting hole; optionally, the end face of the front end plate 11 is a precision machined end face and is provided with a tie rod thread hole and a bolt hole; the front end plate 11 and the rear view hole cover plate 4 are respectively arranged at both ends of the fracturing pump casing, and the rear view hole cover plate 4 is connected to the side plate 9, sealing plate 2, upper arc plate 1, rear view hole cover plate 4 and lower arc plate 8 by forming an annular part; the adjacent intermediate plates 10 and the upper and lower sealing plates 2 can form a slide for the crosshead to slide. By setting the slide in the integrally welded pump casing, it helps to improve the overall strength and reduce the deformation and vibration of the pump casing. Example 2:

[0034] The present invention provides a fracturing pump, including the pump casing of the high-power seven-cylinder fracturing pump described in Embodiment 1.

[0035] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-power seven-cylinder fracturing pump casing, characterized in that, The pump housing includes a pump casing body, which includes two side bearing seats (5). The side walls of the two side bearing seats (5) are provided with the same upper arc plate (1) and the same lower arc plate (8). A rear viewing hole cover plate (4) and a connecting rod crosshead housing are provided between the upper arc plate (1) and the lower arc plate (8). The upper arc plate (1), the lower arc plate (8), the rear viewing hole cover plate (4) and the connecting rod crosshead housing cooperate to form an annular cavity. Multiple intermediate bearing seats (6) are provided parallel and equidistantly between the upper arc plate (1) and the lower arc plate (8) in the annular cavity. A reinforcing rib group is provided between the side bearing seat (5) and the adjacent intermediate bearing seat (6), and between two adjacent intermediate bearing seats (6). The reinforcing rib group includes multiple reinforcing rib plates (15). The multiple reinforcing rib plates (15) located on one side of the upper arc plate (1) are fixedly connected to the upper arc plate (1), and the multiple reinforcing rib plates (15) located on one side of the lower arc plate (8) are fixedly connected to the lower arc plate (8).

2. The pump casing of the high-power seven-cylinder fracturing pump according to claim 1, characterized in that, The connecting rod crosshead housing includes two sealing plates (2), which are in contact with the upper arc plate (1) and the lower arc plate (8) respectively. Side plates (9) are symmetrically arranged between the two sealing plates (2), and the two side plates (9) are located on one side of the two side bearing seats (5). Multiple intermediate plates (10) are arranged parallel and equidistantly between the two sealing plates (2), and the multiple intermediate plates (10) are arranged one-to-one with the multiple intermediate bearing seats (6).

3. The pump casing of the high-power seven-cylinder fracturing pump according to claim 2, characterized in that, The outer wall of the lower arc plate (8) is uniformly provided with a plurality of first foot plates (18), and a support rib plate (19) is provided between the first foot plate (18) and the lower arc plate (8). The bottom end of the side plate (9) is provided with a second foot plate (14), and a front rib plate (13) is provided between the side plate (9) and the second foot plate (14).

4. The pump casing of the high-power seven-cylinder fracturing pump according to claim 1, characterized in that, The axes of the two side bearing seats (5) and the plurality of intermediate bearing seats (6) are all located on the same horizontal line; The number of intermediate bearing seats (6) is six; Both of the side bearing seats (5) are detachably connected to an input mechanism.

5. The pump casing of the high-power seven-cylinder fracturing pump according to claim 1, characterized in that, The outer wall of the upper arc plate (1) is provided with a lifting lug (16), and the outer wall of the lower arc plate (8) is provided with an oil return groove (7). The outer wall of the oil return groove (7) is provided with multiple oil drain ports.

6. The pump casing of the high-power seven-cylinder fracturing pump according to claim 1, characterized in that, The outer wall of the upper arc plate (1) is provided with multiple oil hole flanges (3).

7. The pump casing of the high-power seven-cylinder fracturing pump according to claim 2, characterized in that, The outer walls of the upper arc plate (1) and the two sealing plates (2) are provided with lubricating oil pipes (17).

8. The pump casing of the high-power seven-cylinder fracturing pump according to claim 2, characterized in that, Multiple sliding plate groups are provided parallel and equidistantly between the two sealing plates (2), and the multiple sliding plate groups are staggered with the multiple intermediate plates (10); The skateboard assembly includes multiple skateboard seats (12) symmetrically arranged on the inner walls of the two sealing plates (2).

9. The pump casing of the high-power seven-cylinder fracturing pump according to claim 2, characterized in that, The side walls of the two sealing plates (2) and the side walls of the two side plates (9) are provided with the same front end plate (11), and the outer wall of the front end plate (11) is provided with a tie rod mounting hole.

10. A fracturing pump, characterized in that, The pump housing includes the high-power seven-cylinder fracturing pump as described in any one of claims 1 to 9.

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