Fracturing transmission and high-pressure discharging system

Abstract

The invention relates to a fracturing transmission and high-pressure discharging system. The fracturing transmission and high-pressure discharging system comprises a chassis and is characterized in that a high-power engine, a transfer case, a plurality of variable displacement plunger pumps and a double-acting fracturing pump are arranged on the chassis, the output end of the high-power engine is connected with the input end of the transfer case, the output end of the transfer case comprises a plurality of power take-off ports, and each power take-off port is connected with one variable displacement plunger pump; the variable displacement plunger pumps drive the double-acting fracturing pump through a hydraulic system. The fracturing transmission and high-pressure discharging system further comprises a system radiator and a heat dissipation plunger pump used for driving the system radiator, and the heat dissipation plunger pump is connected with one power take-off port of the transfer case. The power take-off ports of the transfer case and the variable displacement plunger pumps are arranged annularly. The fracturing transmission and high-pressure discharging system has the advantages that hydraulic driving replaces mechanical transmission, and working vibration is reduced; the layout space of a whole vehicle is saved, and meanwhile, operating efficiency and the stability of the whole vehicle are improved.

Description

technical field [0001] The invention relates to the technical field of oilfield equipment, in particular to a fracturing transmission and high-pressure discharge system. Background technique [0002] Fracturing technology is an important operation method in the current oil and gas industry, especially in the current shale gas development at home and abroad. Fracturing fluid, when the pumped pressure exceeds the opening pressure of the formation, will form larger cracks in the oil and gas layer, thereby improving the seepage capacity of the formation and increasing the production of oil and gas. Therefore, fracturing equipment generally requires high-power engines and large displacement. , High pressure fracturing pumps. [0003] At present, the transmission system of commonly used fracturing vehicles mainly adopts mechanical transmission, which drives the conventional fracturing pump through the engine, gearbox and transmission shaft to realize the pumping operation of frac...

AI Technical Summary

Problems solved by technology

[0003] At present, the transmission system of commonly used fracturing vehicles mainly adopts mechanical transmission, which drives the conventional fracturing pump through the engine, gearbox and transmission shaft to realize the pumping operation of fracturing fluid. The overall performance of this transmission scheme is relatively stable, but due to the gearbox, The size of the key transmission parts such as the drive shaft is large, which limits the flexibility of the layout to a certain extent. More importantly, the crankshaft of the fracturing pump generally drives the connecting rod to realize the reciprocating movement of the plunger pump. The higher the number, the higher the construction pressure and power. When the output power is required to be large, due to the large inertia and high speed of the internal power end, relatively large vibrations will be generated during high-pressure operations, which will affect the stability of the entire vehicle. sex and reliability

[0004] In addition, the current displacement control of fracturing operations mainly depends on the gear change of the gearbox and the selection of different fracturing pump plunger specifications. When a large displacement operation is required, it is necessary to select a plunger with a high speed or a large specification. Higher requirements are placed on the service life and transmission system of fracturing pumps

[0005] In addition, in the current commonly used schemes, the heat generated by the gearbox and the large pump due to gear meshing and high-speed rotation during operation requires the assistance of a lubrication and cooling system, and a professional radiator is required for heat dissipation, and the radiator and the supporting lubrication and cooling system It often takes up a large vehicle layout space, which is not conducive to reducing the weight of the vehicle

Images