A high-power hydraulically driven fracturing pump

Abstract

The invention relates to a high-power hydraulic drive fracturing pump which can meet the requirements of high-power fracturing operation. The problem that a fracturing truck set is difficult to arrange in a well site due to the fact that the number of trucks is too large can be solved, and the problems that a fracturing pump is short in service life and the weight of the single truck and the weight of a single axle exceed the national standard weight are solved by means of the high-power hydraulic drive fracturing pump. According to the technical scheme, pump cylinders are connected with an oil cylinder in series and are arranged at the two ends of the oil cylinder; the two ends of the oil cylinder are connected with a valve box B and a valve box C respectively, and the valve box B and the valve box C are connected to a steering assembly of a hydraulic system through hydraulic pipes; a valve box A and a valve box D are installed at the ends of the pump cylinders, an inlet of the valve box A and an inlet of the valve box D are connected to a fracturing fluid inlet through a pipeline, an outlet of the valve box B and an outlet of the valve box C are connected to a fracturing fluid outlet through a pipeline, the valve box A and the valve box C are connected through a pull rod, and the valve box B and the valve box D are connected through a pull rod. According to the high-power hydraulic drive fracturing pump, the power of each single fracturing pump truck can be increased by four to seven times; the frequency of stroke of the fracturing pump is reduced through the increase of the stroke of the pump, and therefore the service life of the fracturing pump is prolonged.

Description

technical field [0001] The invention relates to an operation equipment for oil and gas field development, in particular to a high-power hydraulically driven fracturing pump. Background technique [0002] The fracturing crew consists of a fracturing pump truck, a sand mixing truck, an instrument truck, a manifold truck and a sand transport truck. In foreign countries, a complete supporting system of auxiliary equipment for fracturing operation has been formed, including continuous sand delivery, liquid distribution, tools and liquid treatment systems, etc. Oil and gas well fracturing, especially large-scale fracturing, requires large displacement and high pump pressure. Usually, the displacement of fracturing operations reaches 3-16m 3 / min, the working pressure is 30-130MPa, the construction fluid volume reaches the level of 10,000 cubic meters, and the sand volume reaches the level of 1,000 cubic meters. A single fracturing pump truck is difficult to meet the needs, so th...

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Problems solved by technology

[0004] The existing fracturing pump trucks all use the crankshaft-connecting rod mechanism to drive the plunger. Due to the weight and space limitations of the vehicle, the effective stroke of the plunger is generally within 120mm. In the design, the flow rate can only be increased by increasing the number of strokes. However, the increase in the number of strokes will also accelerate the fatigue damage of the fracturing pump and reduce the service life of the fracturing pump

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