CN111441923A - High-power five-cylinder plunger pump - Google Patents

Abstract

The invention discloses a high-power five-cylinder plunger pump, wherein the stroke of the high-power five-cylinder plunger pump is 10in, the cylinder spacing is 11.5in, and the braking power is 5000 HP. Has the advantages that: high power and large discharge capacity; the method can be suitable for electric drive fracturing and turbine fracturing; the integral power end assembly or the split power end assembly can be selected according to specific operation conditions, so that the arrangement mode of the fracturing units or fracturing trucks is better realized; the cylinder spacing is sized for long stroke 5000HP brake power stable operation safety drive.

Description

High-power five-cylinder plunger pump

technical field

The invention relates to the technical field of plunger pumps, in particular to a high-power five-cylinder plunger pump.

Background technique

With the continuous development of ultra-high pressure, ultra-deep wells and horizontal wells in oil and gas fields, their operating conditions are getting worse and worse, requiring fracturing equipment to operate at high pressure and large displacement, and some well sites also require long-term continuous operation. Under the condition that the total pressure of the well site is constant, the smaller the power displacement of a single fracturing equipment, the more fracturing equipment the well site needs to meet the demand of total pressure.

At present, the area of the well site for oil and gas exploitation is required to be smaller and smaller, and reducing the number of fracturing equipment is one of the effective means; the actual well site access is also more rugged. The longer the well site layout time, the more time-consuming and laborious has become more and more urgent.

The plunger pump is the core component of fracturing equipment. At present, the common plunger pumps on the market mainly include 2800HP five-cylinder plunger pump, 3000HP triplex plunger pump, 3300HP five-cylinder plunger pump and 4000HP triplex plunger pump; The 2800HP five-cylinder plunger pump is mainly configured on the 2500-type fracturing equipment truck, (currently the 2500-type fracturing truck is the most commonly used and more fracturing equipment in fracturing operations); the 4000HP triplex plunger pump is configured on the 3100HP On the fracturing equipment car, but the 4000HP plunger pump is a triplex pump, and its displacement is much lower than that of the 2800HP five-cylinder pump. Under the same plunger specification and the same sprint, its displacement is only 82.54% of the 2800HP five-cylinder pump; In recent years, the emerging electric drive fracturing operation, that is, the fracturing operation form using electric motor as the power source, the electric motor can choose a large power, for example: the rated power can reach 3000kw, 4000kw, 5000kw, 6000kw, etc., but the plunger pump has not yet With such a large size, if the 2800HP plunger pump and the 4000HP plunger pump are configured on the electric drive fracturing equipment, it will not reflect the advantages of electric drive fracturing, which is equivalent to a large horse-drawn trolley.

In addition, turbo fracturing is also the development trend of recent fracturing operations (turbo fracturing is a fracturing operation that uses a turbine engine as a power source), but the output rotation direction of the turbine engine cannot match the input rotation direction of the existing plunger pump. Therefore, the reversing mechanism is usually added before the input rotation direction of the plunger pump, but this will increase the overall weight of the turbo fracturing equipment, increase the risk of failure, and increase the maintenance cost.

Therefore, there is an urgent need for a high-power, large-displacement plunger pump that can meet the requirements of different operating conditions and can also meet the requirements of different fracturing operations.

SUMMARY OF THE INVENTION

The purpose of the present invention overcomes the deficiencies of the prior art, and provides a high-power five-cylinder plunger pump with high power and large displacement; it can be applied to electric drive fracturing and turbo fracturing; the integral type can be selected according to specific operating conditions The power end assembly or the split power end assembly can better realize the arrangement of the fracturing unit or the fracturing truck; the size of the cylinder spacing ensures the stable operation of the long-stroke 5000HP braking power.

The purpose of the present invention is achieved by the following technical measures: a high-power five-cylinder plunger pump, the stroke of the high-power five-cylinder plunger pump is 10 inches, the cylinder spacing is 11.5 inches, and the braking power is 5000HP.

Further, the high-power five-cylinder plunger pump includes a power end assembly, a hydraulic end assembly and a reduction box assembly, and the hydraulic end assembly and the reduction box assembly are respectively connected to the power end assembly, so The reduction gear box assembly includes a parallel stage reduction box and a planetary stage reduction box, one end of the planetary stage reduction box is connected to the parallel stage reduction box, and the other end of the planetary stage reduction box is connected to the power end assembly.

Further, the reduction ratio of the reduction box assembly is 12.2-12.5.

Further, the reduction ratio of the parallel-stage reduction box is 2.1-2.5, and the reduction ratio of the planetary-stage reduction box is 5-5.8.

Further, the reduction ratio of the reduction box assembly is suitable for the fracturing operation using the electric motor as the power source.

Further, the reduction ratio of the reduction box assembly is 9.4-9.6.

Further, the reduction ratio of the parallel-stage reduction box is 1.6-1.8, and the reduction ratio of the planetary-stage reduction box is 5.3-6.3.

Further, the reduction ratio of the reduction box assembly is suitable for the fracturing operation using the turbine engine as the power source.

Further, the reduction box assembly is installed at the left end or the right end of the power end assembly according to actual use requirements.

Further, when the high-power five-cylinder plunger pump is used in the fracturing operation with an electric motor as the power source, the reduction box assembly is installed on the left or right end of the power end assembly. When the high-power five-cylinder plunger pump is used During the fracturing operation using the turbine engine as the power source, the reduction box assembly is installed at the right end of the power end assembly.

Further, the power end assembly adopts an integral power end assembly or a split power end assembly according to actual use requirements.

Further, the power end assembly includes a power end housing, a crosshead support box and a cage, and the power end shell, the crosshead support box and the cage are arranged in sequence, and it is regarded as an integral power end assembly. When the power end housing and the crosshead support box are integral, when it is a split power end assembly, the power end housing and the crosshead support box are independent structures, and the power end housing and the crosshead support box are independent structures. The body is fixed by bolts.

Compared with the prior art, the present invention has the beneficial effects that the stroke of 10 inches ensures a large displacement, that is, a large power is ensured, and the operation efficiency is improved. The 11.5in cylinder spacing increases the bearing area of the connecting rod crosshead assembly (connecting rod, crosshead and bearing bush), providing sufficient bearing capacity for the 5000HP five-cylinder plunger pump and ensuring its stable large displacement Output, the power of the five-cylinder plunger pump is increased, that is, the fracturing capacity of a single fracturing equipment is improved, so that it can reduce the total number of fracturing equipment in the well site, effectively solving the problem of small well site area and more fracturing equipment It can also save time and effort and quickly complete the well site layout. The two transmission ratios solve the problem that there is no high-power plunger pump to match the existing high-power power source in electric fracturing and turbo fracturing. Matching turbine engine and selected electric motor. Under the premise of not adding a reversing mechanism, the biggest problem is solved only at the smallest cost, that is, the right end of the reduction box assembly is installed, so that the output rotation direction of the turbine engine matches the input rotation direction of the crankshaft, so as to make the turbo fracturing equipment The drive of the five-cylinder plunger pump is realized without increasing the weight, without increasing the risk of failure, and without increasing the maintenance cost. Integral power end assembly or split power end assembly can be selected according to specific operating conditions, so as to better realize the arrangement of fracturing units or fracturing vehicles.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Figure 1 is a schematic diagram of the structure of the high-power five-cylinder plunger pump (installed at the right end).

Figure 2 is a schematic structural diagram of the high-power five-cylinder plunger pump (installed at the left end).

FIG. 3 is a cross-sectional view of the high-power five-cylinder plunger pump.

Figure 4 is a schematic diagram of the power end assembly split structure.

FIG. 5 is a schematic diagram of the integrated structure of the power end assembly.

FIG. 6 is a schematic structural diagram of a connecting rod crosshead assembly.

FIG. 7 is a schematic diagram of the structure of the crankshaft.

FIG. 8 is a schematic structural diagram of the reduction box assembly.

FIG. 9 is a schematic structural diagram of a parallel-stage reduction gearbox.

Figure 10 is a schematic diagram of the structure of the planetary gear box.

Among them, 1. Power end assembly, 2. Hydraulic end assembly, 3. Gearbox assembly, 4. Input flange, 5. Power end housing, 6. Bearing, 7. Crankshaft, 8. Connecting rod cross Head assembly, 9. Crank neck, 10. Crank crank, 11. Plunger, 12. Valve box, 13. Cross head support box, 14. Cage, 15. Connecting bolt, 16. Parallel stage reduction box, 17 . Planetary gear box, 18. Big gear, 19. Small gear, 20. Planetary gear, 21. Gear ring, 22. Sun gear.

Detailed ways

As shown in Figures 1 to 10, the high-power five-cylinder plunger pump has a stroke of 10 inches, a cylinder spacing of 11.5 inches, and a braking power of 5000 HP. The 10in stroke ensures a large displacement, which ensures high power and improves work efficiency. The 11.5in cylinder spacing increases the bearing area of the connecting rod crosshead assembly 8 (connecting rod, crosshead and bearing bush), providing enough bearing capacity for the 5000HP five-cylinder plunger pump to ensure its stable large discharge The output of the five-cylinder plunger pump is increased, that is, the fracturing capacity of a single fracturing equipment is improved, so that it can reduce the total number of fracturing equipment in the well site, and effectively solve the problem of the small well site area and the comparison of fracturing equipment. It also saves time and effort to quickly complete the well site layout.

The high-power five-cylinder plunger pump includes a power end assembly 1, a hydraulic end assembly 2 and a reduction box assembly 3, and the hydraulic end assembly 2 and the reduction box assembly 3 are respectively connected with the power end assembly 1. The hydraulic end assembly 2 is connected with the power end assembly 1 through the connecting bolts 15; the reduction box assembly 3 is connected with the power end assembly 1 through bolts, and the reduction box assembly 3 is provided with an external input Flange 4, external power source through input flange 4. The reduction box assembly 3 includes a parallel stage reduction box 16 and a planetary stage reduction box 17, one end of the planetary stage reduction box 17 is connected to the parallel stage reduction box 16, and the other end of the planetary stage reduction box 17 is connected to the power End assembly 1 connection. The input angle of the reduction box assembly 3 can be adjusted according to the input requirements, which can meet the multi-angle adjustment required for the transmission of the five-cylinder plunger pump in the fracturing equipment. The reduction box assembly 3 adopts helical gear meshing, and the planetary reduction box 17 includes a sun gear 22, four planetary gears 20 and a gear ring 21. The four planetary gears 20 form a planetary gear mechanism, and the planetary gear mechanism Located inside the gear ring 21, the sun gear 22 is located in the center of the planetary gear mechanism; the parallel-stage reduction box 16 includes a large gear 18 and a pinion 19, the pinion 19 is connected to the input flange 4, and the large gear 18 is connected to the planetary stage. The sun gear 22 of the reduction box 17 is coaxially connected; the input speed of the input flange 4 is transmitted to the large gear 18 through the pinion gear 19 to achieve a first-level deceleration, and is transmitted to the sun gear 22 through the large gear 18, and the sun gear 22 is transmitted to the planetary gear 20 Realize two-stage reduction, so as to obtain a large transmission ratio. The liquid end assembly 2 includes a valve box 12 and a plunger 11 , and the plunger 11 is arranged inside the valve box 12 .

The reduction ratio of the reduction box assembly 3 is 12.2-12.5. The reduction ratio of the parallel-stage reduction box 16 is 2.1-2.5, and the reduction ratio of the planetary-stage reduction box 17 is 5-5.8. The reduction ratio of the reduction box assembly 3 is suitable for the fracturing operation using the electric motor as the power source, that is, electric drive fracturing. The reduction ratio of the reduction box assembly 3 is 9.4-9.6. The reduction ratio of the parallel-stage reduction box 16 is 1.6-1.8, the reduction ratio of the planetary-level reduction box 17 is 5.3-6.3, and the reduction ratio of the reduction box assembly 3 is suitable for the fracturing operation with the turbine engine as the power source , namely turbo fracturing. The two transmission ratios solve the problem that there is no high-power plunger pump to match the existing high-power power source in electric fracturing and turbo fracturing. Matching turbine engine and selected electric motor.

Through the setting of different reduction ratios, the applicability of the 5000HP high-power five-cylinder plunger pump is increased, which can be applied to both electric drive fracturing operations and turbo fracturing operations. The displacement output of a single electric-driven fracturing equipment and a single turbo fracturing equipment has been increased, which has solved the technical problem that the current "small well site" is difficult to perform large-scale operations.

The reduction box assembly 3 is installed at the left end or the right end of the power end assembly 1 according to actual use requirements. Compared with the existing five-cylinder plunger pump, the connection mode of the right end is added, that is, the reduction box assembly 3 is connected to the right end of the crankshaft 7 in the power end assembly 1 .

When the high-power five-cylinder plunger pump is used in the fracturing operation with the electric motor as the power source, the reduction box assembly 3 is installed on the left or right end of the power end assembly 1. Because the output rotation direction of the electric motor is adjustable, so Regardless of whether the reduction box assembly 3 is installed at the left or right end of the power end assembly 1 , it is only necessary to adjust the output rotation direction of the motor according to the input rotation direction of the crankshaft 7 . When the high-power five-cylinder plunger pump is used in the fracturing operation with the turbine engine as the power source, the reduction box assembly 3 is installed at the right end of the power end assembly 1 . Under the premise of not adding a reversing mechanism, the biggest problem can be solved only at the minimum cost, that is, the right end of the reduction box assembly 3 is installed, so that the output rotation direction of the turbine engine matches the input rotation direction of the crankshaft 7, so that the turbo pressure The cracking equipment realizes the drive of the five-cylinder plunger pump without increasing the weight, increasing the risk of failure, and increasing the maintenance cost.

The power end assembly 1 adopts an integral power end assembly 1 or a split power end assembly 1 according to actual use requirements. The integral power end assembly 1 is suitable for high-pressure continuous operation of well site fracturing due to its high rigidity, strong bearing capacity and stable structure, and is suitable for the installation and arrangement of the whole skid. The split power end assembly 1 is lighter in weight than the integral power end assembly 1, and is suitable for intermittent operation of well site fracturing, and can provide more carrier forms for fracturing equipment, such as vehicle-mounted, semi-trailer, and skid-mounted. and other forms. The two power-end assemblies 1 can better meet the different job requirements and carrying requirements on site.

The power end assembly 1 includes a power end housing 5, a crosshead support box 13 and a retainer 14, and the power end housing 5, the crosshead support box 13 and the retainer 14 are arranged in sequence, and are integral. When the power end assembly 1 is used, the power end housing 5 and the crosshead support box 13 are integral; when the split power end assembly 1 is used, the power end housing 5 and the crosshead support box 13 are independent structures , the power end housing 5 and the crosshead support box 13 are fixed by bolts. A crankshaft assembly is arranged in the power end housing 5, a connecting rod crosshead assembly 8 is arranged in the crosshead support box 13, the crankshaft assembly is connected with one end of the connecting rod crosshead assembly 8, and the connecting rod crosshead assembly 8 The other end of the valve drives the plunger 11 to reciprocate in the valve box 12 through the transmission of the pull rod, so as to realize the suction of low-pressure liquid and the discharge of high-pressure liquid. The crankshaft assembly includes a crankshaft 7 and a bearing 6. The crankshaft 7 is connected to the power end housing 5 through the bearing 6. The crankshaft 7 includes six crankshafts 9 and five crankshafts 10, two adjacent crankshafts. A crank 10 is set between 9, and the distance between the crank 10 and the rotation center of the crankshaft 7 is 5 inches, and the bearing 6 is a cylindrical roller bearing.

Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (12)

1. The high-power five-cylinder plunger pump is characterized in that: the stroke of the high-power five-cylinder plunger pump is 10in, the cylinder spacing is 11.5in, and the braking power is 5000HP. 2. The high-power five-cylinder plunger pump according to claim 1, wherein the high-power five-cylinder plunger pump comprises a power end assembly, a hydraulic end assembly and a reduction box assembly, and the hydraulic The force end assembly and the reduction box assembly are respectively connected with the power end assembly, the reduction box assembly includes a parallel stage reduction box and a planetary stage reduction box, and one end of the planetary stage reduction box is connected with the parallel stage reduction box, The other end of the planetary gear box is connected with the power end assembly. 3. The high-power five-cylinder plunger pump according to claim 2, wherein the reduction ratio of the reduction box assembly is 12.2-12.5. 4. The high-power five-cylinder plunger pump according to claim 3, wherein the reduction ratio of the parallel-stage reduction box is 2.1-2.5, and the reduction ratio of the planetary-stage reduction box is 5-5.8. 5. The high-power five-cylinder plunger pump according to claim 3 or 4, wherein the reduction ratio of the reduction box assembly is suitable for the fracturing operation using the electric motor as the power source. 6 . The high-power five-cylinder plunger pump according to claim 2 , wherein the reduction ratio of the reduction box assembly is 9.4-9.6. 7 . 7 . The high-power five-cylinder plunger pump according to claim 6 , wherein the reduction ratio of the parallel stage reduction box is 1.6-1.8, and the reduction ratio of the planetary stage reduction box is 5.3-6.3. 8 . 8. The high-power five-cylinder plunger pump according to claim 2 or 6, wherein the reduction ratio of the reduction box assembly is suitable for fracturing operations using a turbine engine as a power source. 9 . The high-power five-cylinder plunger pump according to claim 1 , wherein the reduction gearbox assembly is installed on the left end or the right end of the power end assembly according to actual use requirements. 10 . 10. The high-power five-cylinder plunger pump according to claim 9, characterized in that: when the high-power five-cylinder plunger pump is used in a fracturing operation with an electric motor as a power source, the reduction box assembly is installed in the On the left or right end of the power end assembly, when the high-power five-cylinder plunger pump is used in the fracturing operation with the turbine engine as the power source, the reduction box assembly is installed on the right end of the power end assembly. 11 . The high-power five-cylinder plunger pump according to claim 1 , wherein the power end assembly adopts an integral power end assembly or a split power end assembly according to actual use requirements. 12 . 12. The high-power five-cylinder plunger pump according to claim 11, wherein the power end assembly comprises a power end housing, a crosshead support box and a cage, the power end housing, a crosshead The head support box and the cage are arranged in sequence. When it is an integral power end assembly, the power end shell and the cross head support box are integral, and when it is a split power end assembly, the power end shell and the cross The head support box is an independent structure, and the power end shell and the cross head support box are fixed by bolts.

Images