A multi-power driven mud pump

Abstract

This utility model discloses a multi-power driven mud pump, including a base with pump hydraulic end assemblies arranged on the base. Its key feature is that it further includes a multi-power variable speed drive mechanism, which is located on the base and beside the mud pump. The multi-power variable speed drive mechanism includes one or two combined gearboxes, each equipped with 2-6 motor gearbox assemblies. The output shafts of the multiple motor gearbox assemblies are connected to multiple input shafts on the corresponding combined gearboxes via couplings, and the output shafts of the multiple motor gearbox assemblies are circumferentially distributed around the output shaft of the combined gearbox. This device has a compact structure, is lightweight, has low purchase cost, high operating efficiency, low transportation cost, and is easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of petroleum engineering equipment technology, and in particular to a multi-power driven mud pump. Background Technology

[0002] A mud pump is a machine used to deliver mud or water, or other flushing fluid, into the borehole during drilling; it is an important component of drilling equipment. Commonly used mud pumps are piston or plunger type, driven by a power unit that rotates the pump's crankshaft. The crankshaft, through a crosshead, drives the piston or plunger in a reciprocating motion within the pump cylinder. The alternating action of the suction and discharge valves achieves the purpose of pressurizing and circulating the flushing fluid.

[0003] Currently, domestically used electric mud pumps in petroleum engineering typically employ one or two high-power, low-to-medium speed electric motors. These motors, after being reduced in speed via belt pulleys, drive the input gear shaft of the mud pump. Inside the pump, the input gear shaft meshes with a large gear ring on the crankshaft for further reduction, ultimately driving the hydraulic end to operate the mud pump. Because traditional electric pump sets lack speed regulation, depending on the drilling conditions, large-diameter cylinder liners are required for high displacement and low pump pressure, while small-diameter cylinder liners are needed for low displacement and high pump pressure. This process is time-consuming and labor-intensive for workers. Furthermore, existing mud pumps have a gear transmission between the input shaft and crankshaft, resulting in a large volume that is inconvenient for transportation and occupies a significant floor space. In summary, the disadvantages of traditional electric mud pumps include large size and weight, high cost of low-to-medium speed motors, low efficiency of belt drives, inconvenient overall transportation, high spare parts cost, and difficulty in maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a multi-power driven mud pump. Multiple motor gearbox assemblies are mechanically coupled and decelerated through a combined reduction gearbox to drive the mud pump crankshaft, which in turn drives the hydraulic end. Through the multi-speed transmission function of the electric gearbox assembly, it can adapt to drilling conditions requiring high pump pressure and low displacement, as well as large displacement and low pump pressure, without replacing cylinder liners. This improves work efficiency, reduces worker labor intensity, and the device is compact, lightweight, has low purchase cost, high operating efficiency, low transportation cost, and is easy to maintain.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A multi-power driven mud pump includes a base with pump hydraulic end assemblies arranged on the base, and a multi-power variable speed drive mechanism located on the base and on the side of the mud pump. The multi-power variable speed drive mechanism includes one or two combined gearboxes, each combined gearbox is equipped with 2-10 motor gearbox assemblies, the output shafts of the multiple motor gearbox assemblies are connected to multiple input shafts on the corresponding combined gearboxes via couplings, and the output shafts of the multiple motor gearbox assemblies are circumferentially distributed around the output shaft of the combined gearbox.

[0007] The aforementioned motor-gearbox assembly consists of a motor and a gearbox integrated into one unit;

[0008] The aforementioned reducer includes a housing with an end cover on the outside. Inside the housing are an output gear shaft and multiple input gear shafts distributed around the circumference of the output gear shaft. The input gears on the output gear shaft mesh with the output gears on the output gear shaft. The inner end of the output gear shaft connects to a pump hydraulic end assembly, and the telescopic end of the pump hydraulic end assembly is connected to a crankshaft. The outer ends of the input gear shaft and the output gear shaft are movably connected to the end cover via bearings. The inner end of the input gear shaft is connected to the motor gearbox assembly via a coupling.

[0009] When one combined reduction gearbox is used, the combined reduction gearbox is located on one side of the rear end of the mud pump, and the motor gearbox assembly is located inside the combined reduction gearbox and distributed around the periphery of the rear end of the mud pump; when two combined reduction gearboxes are used, the two combined reduction gearboxes are located on the left and right sides of the rear end of the mud pump, respectively, and the motor gearbox assembly is located inside each combined reduction gearbox and distributed around the periphery of the rear end of the mud pump.

[0010] The aforementioned gearbox also has an idler shaft inside, which is located between the input gear shaft and the output gear shaft. The idler shaft is located between the input gear and the output gear, and the two ends of the idler shaft are movably connected to the housing and end cover through bearings.

[0011] The motor is an automotive-grade high-speed permanent magnet synchronous motor, and the output shaft of the motor is connected to the input end of the gearbox via a coupling, splined shaft or shrink sleeve.

[0012] The combined reduction gearbox and motor gearbox assembly are all integrated and installed on the mud pump base for overall transportation.

[0013] This utility model has the following effects:

[0014] 1) The crankshaft of the mud pump is directly driven by multiple motors through mechanical coupling via a force box. The overall structure is compact, small in size and light in weight, and the crankshaft manufacturing process is simple.

[0015] 2) It adopts automotive-grade liquid-cooled high-speed permanent magnet motor and multi-speed gearbox assembly products. By adjusting the gears under different strokes, the motor can keep working in the high-efficiency range, resulting in high operating efficiency.

[0016] 3) For different specifications of drilling rigs, different numbers of the same model of motors and gearboxes are used to match them, which has good versatility, low motor power, low price, and significantly reduces spare parts costs; when a motor or gearbox fails, the drilling rig can still work normally by reducing power (stopping one unit), without affecting the drilling operation process, and can be replaced or repaired after the operation is completed. Attached Figure Description

[0017] Figure 1 This is the front view of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the resultant box of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of a single force distribution box used in this utility model. Figure 1 ;

[0021] Figure 5 This is a schematic diagram of the installation structure of a single force distribution box used in this utility model. Figure 2 ;

[0022] Figure 6 This is a schematic diagram of the installation structure of the present invention using two combiner boxes;

[0023] Figure 7 This is a schematic diagram of the structure of the resultant box of this utility model, which has an idler wheel inside. Detailed Implementation

[0024] like Figure 1 and Figure 2 As shown, this utility model includes a base 1, on which pump hydraulic end groups are arranged, and also includes a multi-power speed change drive mechanism, which is located on the base 1 and on the side of the mud pump 2.

[0025] The multi-power transmission drive mechanism includes one or two combined reduction gearboxes 3. Each combined reduction gearbox 3 is equipped with 2-6 motor shift gearboxes 4-2 assemblies 4. The output shafts of the multiple motor shift gearboxes 4-2 assemblies 4 are connected to multiple input shafts on the corresponding combined reduction gearbox 3 through couplings. The output shafts of the multiple motor shift gearboxes 4-2 assemblies 4 are circumferentially distributed around the output shaft of the combined reduction gearbox 3.

[0026] The motor shift box 4-2 assembly 4 consists of a motor 4-1 and a shift box 4-2 integrated together; the shift box has at least two gears. The motor shift box 4-2 assembly 4 is connected to the reducer 3 via a universal joint or as an integrated unit. That is, the output shaft of the shift box 4-2 is driven to the reducer 3, and the connection method can be a coupling, splined shaft, shrink sleeve, or integrated design. The motor 4-1 is an automotive-grade high-speed permanent magnet synchronous motor 4-1, and the output shaft of the motor 4-1 is connected to the input end of the shift box via a coupling, splined shaft, or shrink sleeve.

[0027] In this utility model, the direction of the outer edge of the base 1 outward is defined as the "outer" and the direction of the inner circumference of the base 1 inward is defined as the "inner".

[0028] like Figure 3 As shown, the combined force reduction gearbox 3 includes a housing 3-1, an end cover 3-2 on the outer side of the housing 3-1, an output gear shaft 3-3 and multiple input gear shafts 3-4 distributed around the circumference of the output gear shaft 3-3 inside the housing 3-1, an output gear 3-5 on the output gear shaft 3-3 meshing with an output gear 3-6 on the input gear shaft 3-4, an inner end of the output gear shaft 3-3 connecting to a pump hydraulic end assembly, an extension end of the pump hydraulic end assembly connecting to a crankshaft 5, and outer ends of the input gear shafts 3-4 and the output gear shaft 3-3 being movably connected to the end cover 3-2 via bearings 7; and an inner end of the input gear shaft 3-4 being connected to the motor shift box 4-2 assembly 4 via a coupling.

[0029] When one reducer 3 is used, the reducer 3 is located on one side of the rear end of the mud pump 2. At least two motor shift boxes 4-2 assemblies 4 are matched and installed. The motor shift boxes 4-2 assemblies 4 are located inside the reducer 3 and are distributed around the periphery of the rear end of the mud pump 2.

[0030] When two combined reduction gearboxes 3 are used, the two combined reduction gearboxes 3 are located on the left and right sides of the rear end of the mud pump 2, respectively. Each combined reduction gearbox 3 is matched with at least two motor shift boxes 4-2 assemblies 4. The motor shift boxes 4-2 assemblies 4 are located inside each combined reduction gearbox 3 and are distributed around the periphery of the rear end of the mud pump 2.

[0031] The combined force reduction gearbox 3 is also provided with an idler shaft 3-7 inside. The idler shaft 3-7 is located between the input gear shaft 3-4 and the output gear shaft 3-3. The idler wheel 3-8 on the idler shaft 3-7 is located between the input gear 3-5 and the output gear 3-6. The two ends of the idler shaft 3-7 are movably connected to the gearbox body 3-1 and the end cover 3-2 through bearings 7.

[0032] The combined reduction gearbox 3 and the motor 4-1 reduction gearbox assembly are both integrated and installed on the base 1 of the mud pump 2, and transported as a whole.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model comprises an integrated design of multiple motor shift boxes 4-2 assemblies 4 fixed on a combined reduction gearbox 3. The input gear shaft 3-4 of the combined reduction gearbox 3 is fixed to the housing 3-1 and end cover 3-2 via bearings 7. The output gear 3-6 is fixed to the output gear shaft 3-3, which is also fixed to the housing 3-1 and end cover 3-2 via bearings 7. The output gear shaft 3-3 is connected to the hydraulic end assembly of the pump. The telescopic end of the hydraulic end assembly is connected to the crankshaft 5, driving its rotation and thus driving the mud pump 2. All the above equipment is fixed on the base 1 of the mud pump 2. Due to the compact installation and distribution of the various components, the overall volume is reduced, meeting the requirements for overall transportation. This allows for overall transportation, facilitating the tedious on-site installation work and reducing resource waste.

[0035] like Figure 4 and Figure 5 As shown, when one unit of the combined force reduction gearbox 3 is used, the combined force reduction gearbox 3 is located on one side of the rear end of the mud pump 2. At least four or three motor shift boxes 4-2 assemblies 4 are matched and installed. The motor shift boxes 4-2 assemblies 4 are located inside the combined force reduction gearbox 3 and are distributed around the outer periphery of the rear end of the mud pump 2. For example... Figure 6 As shown, when two combined reduction gearboxes 3 are used, the two combined reduction gearboxes 3 are located on the left and right sides of the rear end of the mud pump 2, respectively. Each combined reduction gearbox 3 is matched with three motor shift boxes 4-2 assemblies 4. The motor shift boxes 4-2 assemblies 4 are located inside each combined reduction gearbox 3 and are distributed around the outer periphery of the rear end of the mud pump 2.

[0036] The aforementioned distribution design of the combined force reduction gearbox 3 and the motor shift gearbox 4-2 assembly 4, combined with the structure of the mud pump 2 itself, distributes the motor shift gearbox 4-2 assembly 4 around the rear periphery of the mud pump 2 on one hand, and around the circumference of the output gear shaft 3-3 on the other, maximizing space utilization and making the overall structure more compact. Furthermore, this utility model integrates the motor shift gearbox 4-2 assembly 4 with the combined force gearbox, not only reducing installation steps but also making the equipment more compact and rational.

[0037] like Figure 7As shown, the reducer 3 also includes an idler shaft 3-7, located between the input gear shaft 3-4 and the output gear shaft 3-3. An idler wheel 3-8 on the idler shaft 3-7 is positioned between the input gear 3-5 and the output gear 3-6. Both ends of the idler shaft 3-7 are movably connected to the housing 3-1 and the end cover 3-2 via bearings 7. The idler wheel 3-8, when structurally necessary, can provide more space for the installation of the motor gearbox assembly on the input shaft.

[0038] This invention employs multiple low-power, vehicle-rail grade high-speed permanent magnet synchronous motors 4-1 as the power input source, enabling large annual production, easy purchase and replacement, and low cost. The input shaft, gear pair, and crankshaft 5 gear ring of the existing mud pump 2 are eliminated, simplifying the structural design of the mud pump 2 and significantly reducing the size and weight of the pump body. Parallel gear transmission is used, resulting in high transmission efficiency, a compact structure, and light weight. Multi-speed function ensures that large displacement low pump pressure or small displacement high pump pressure output can be achieved without replacing the cylinder liner, meeting the operating conditions of the mud pump 2, improving work efficiency, and reducing the labor intensity of workers. When a motor 4-1 fails, redundancy is achieved by reducing power operation (stopping one motor). The entire mud pump 2 is more than 30% lighter than the existing electrically driven mud pump 2, with a smaller size, allowing for overall vehicle transport. This invention solves a problem that has been sought to be addressed in this field, and has significant economic and social benefits.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-power driven mud pump, comprising a base, on which pump hydraulic end assemblies are arranged, characterized in that: It also includes a multi-power transmission drive mechanism, which is mounted on the base and located on the side of the mud pump; the multi-power transmission drive mechanism includes one or two combined gearboxes, each combined gearbox is equipped with 2-6 motor gearbox assemblies, the output shafts of the multiple motor gearbox assemblies are connected to multiple input shafts on the corresponding combined gearbox through couplings, and the output shafts of the multiple motor gearbox assemblies are circumferentially distributed around the output shaft of the combined gearbox; The aforementioned motor-gearbox assembly consists of a motor and a gearbox integrated into one unit; The aforementioned reducer includes a housing with an end cover on the outside. Inside the housing are an output gear shaft and multiple input gear shafts distributed around the circumference of the output gear shaft. The input gears on the output gear shaft mesh with the output gears on the output gear shaft. The inner end of the output gear shaft connects to a pump hydraulic end assembly, and the telescopic end of the pump hydraulic end assembly is connected to a crankshaft. The outer ends of the input gear shaft and the output gear shaft are movably connected to the end cover via bearings. The inner end of the input gear shaft is connected to the motor gearbox assembly via a coupling. When one combined reduction gearbox is used, the combined reduction gearbox is located on one side of the rear end of the mud pump, and the motor gearbox assembly is located inside the combined reduction gearbox and distributed around the periphery of the rear end of the mud pump; when two combined reduction gearboxes are used, the two combined reduction gearboxes are located on the left and right sides of the rear end of the mud pump, respectively, and the motor gearbox assembly is located inside each combined reduction gearbox and distributed around the periphery of the rear end of the mud pump.

2. The multi-power driven mud pump according to claim 1, characterized in that: The aforementioned gearbox also has an idler shaft inside, which is located between the input gear shaft and the output gear shaft. The idler shaft is located between the input gear and the output gear, and the two ends of the idler shaft are movably connected to the housing and end cover through bearings.

3. The multi-power driven mud pump according to claim 1, characterized in that: The motor is an automotive-grade high-speed permanent magnet synchronous motor, and the output shaft of the motor is connected to the input end of the gearbox via a coupling, splined shaft or shrink sleeve.

4. The multi-power driven mud pump according to claim 1, characterized in that: The combined reduction gearbox and motor gearbox assembly are all integrated and installed on the mud pump base for overall transportation.

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