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Hydraulic drive fracturing pump

A fracturing pump and high-pressure cylinder technology, applied in the field of hydraulically driven fracturing pumps, can solve the problems of only tens of hours of service life, low working efficiency, short life of wearing parts, etc., to improve effective suction efficiency and simple structure , the effect of improving life expectancy

Active Publication Date: 2018-08-21
阿奥艾斯能源科技成都有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned crankshaft type plunger pump, the stroke is short (such as the stroke of the five-cylinder plunger pump is about 200mm), the number of reversing times is large, the plunger moves frequently, and the life of the wearing parts is short, for example, the valve seat of the fluid end, The service life of valves and valve rubbers is only tens of hours; in addition, the output pressure and flow coverage of this crankshaft plunger pump is relatively narrow. To improve the coverage, it is necessary to replace the liquid end with a different cylinder diameter; in addition, When the plunger changes direction frequently and quickly, the fracturing fluid will be discharged before it is fully sucked in, resulting in low suction efficiency and low work efficiency; in addition, the fracturing pump is integrated with a crankshaft, power input gear, connecting rod, and hydraulic pump. The box body and seat body at the end have complex structure, high manufacturing cost, and inconvenient disassembly and maintenance; in addition, the power input gear rotates at high speed and heavy load, which has high requirements for lubrication and cooling, and it is necessary to arrange a complex lubrication system and corresponding cooling. system

Method used

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  • Hydraulic drive fracturing pump
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  • Hydraulic drive fracturing pump

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Embodiment Construction

[0026] see Figure 1-3, which is a preferred embodiment of the present invention, the present invention provides a hydraulically driven fracturing pump, which is provided with an oil inlet P, an oil return port T, a liquid inlet V, and a high-pressure liquid outlet H, which includes a booster cylinder and pilot-operated hydraulic control reversing valve; the booster cylinder includes a low-pressure cylinder 4, a low-pressure piston 6, a left high-pressure plunger 5b, a right high-pressure plunger 5a, a left high-pressure cylinder 3b and a right high-pressure cylinder 3a, and the low-pressure piston 6 is slidably set at the low pressure In the cylinder 4, a left piston chamber 4b and a right piston chamber 4a are respectively formed at its left and right ends, and its left and right ends are respectively slidably arranged with the left high pressure plunger 5b in the left high pressure cylinder 3b and the right piston chamber 4a in the right high pressure cylinder 3a. The high-...

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Abstract

The invention discloses a hydraulic drive fracturing pump. The pump is provided with an oil inlet P, an oil return port P, a liquid inlet V and a high pressure oil outlet H. The pump includes a pressure cylinder and a pilot operated directional control valve. The pressure cylinder includes a low pressure cylinder, a low pressure piston, a left high pressure plunger, a right high pressure plunger,a left high pressure cylinder and a right high pressure cylinder; when the low pressure piston moves left to the position where the low pressure piston fully covers a first through runner, the pilot operated directional control valve is triggered to reverse, and the low pressure piston is braked by a closed left piston cavity; when the low pressure piston moves right to the position where the lowpressure piston completely covers a second through runner, the pilot operated directional control valve is triggered to reverse, and the low pressure piston is braked by a closed right piston cavity;the fracturing pump has the advantages of simple structure, no need of electric control, and low noise.

Description

technical field [0001] The invention relates to the technical field of oil and gas fracturing, in particular to a hydraulically driven fracturing pump. Background technique [0002] Fracturing operation is one of the important means to transform oil and gas reservoirs. For low permeability oil and gas wells, fracturing operations are generally required to achieve the purpose of stabilizing and increasing production. The fracturing pump is the main engine of the fracturing vehicle and the most direct execution equipment to realize the purpose of the fracturing process. It is mainly composed of power end assembly and hydraulic end assembly and other components. [0003] In the prior art, the fracturing pump used as the delivery mechanism generally adopts the crankshaft type plunger pump, Figure 4 It is a schematic diagram of the structure of this crankshaft plunger pump, such as Figure 4 As shown, the crankshaft plunger pump 1' includes a crankshaft 11', a plurality of conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26F04B9/10F04B53/10
Inventor 邵玉刚
Owner 阿奥艾斯能源科技成都有限公司
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