Pulse generating device
A technology of a pulse generating device and a main cavity is applied in the field of hydraulic fracturing tools, and can solve the problems of limited application and promotion of vibration oil recovery technology, limited hydraulic wave amplitude and frequency characteristics, and limited effect.
Active Publication Date: 2021-05-14
YANGTZE UNIVERSITY
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Problems solved by technology
[0003] Hydraulic fracturing devices use self-oscillating nozzles to form pressure pulses or generate pressure pulses by changing the flow area, and the amplitude and frequency characteristics of the generated hydraulic waves are greatly restricted. Limited, resulting in limited application and popularization of vibration recovery technology
Method used
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[0046] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0047] Such as Figure 1 to Figure 2 As shown, a pulse generating device includes: a tubular main cavity 1, the main cavity 1 is provided with a fluid inlet 2; a transmission mechanism 3 is installed inside the main cavity 1, and the transmission mechanism 3 enters the main cavity 1 Driven by the fluid inside; the booster chamber 4 installed inside the main cavity 1, the booster chamber 4 communicates with the main cavity 1, the transmission mechanism 3 acts on the booster chamber 4, and when the transmission mechanism 3 is working, the booster can be adjusted. The volume of the pressure chamber 4 ; the outside of the main cavity 1 is communicated with the inside of the pressure chamber 4 through the jet channel 5 ....
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The invention relates to a pulse generation device. The pulse generation device comprises a tubular main cavity and a pressurizing chamber installed in the main cavity, and the main cavity is provided with a fluid inlet; a transmission mechanism is installed in the main cavity and driven by fluid entering the main cavity; the pressurizing chamber communicates with the interior of the main cavity, the transmission mechanism acts on the pressurizing chamber, and the volume of the pressurizing chamber is adjusted when the transmission mechanism is in a working state; and the exterior of the main cavity communicates with the interior of the pressurizing chamber through a jet flow channel. The transmission mechanism is driven by fluid to work so as to adjust the volume of the pressurizing chamber, and pressurizing of the fluid in the pressurizing chamber is achieved by reducing the volume of the pressurizing chamber so as to increase the amplitude of hydraulic waves.
Description
technical field [0001] The invention relates to the technical field of hydraulic fracturing tools, in particular to a pulse generating device. Background technique [0002] Hydraulic fracturing is an oil and gas well stimulation measure with wide application prospects. It uses high-speed and high-pressure fluid to carry sand bodies for jet flow. After opening the channel between the formation and the wellbore, the fluid displacement is increased, thereby opening fractures in the formation. To improve the seepage conditions of low-permeability formations and achieve increased production and injection. [0003] Hydraulic fracturing devices use self-oscillating nozzles to form pressure pulses or generate pressure pulses by changing the flow area. The amplitude and frequency characteristics of the generated hydraulic waves are greatly restricted, and the effect is limited, which limits the application and promotion of vibration oil recovery technology. Contents of the inventio...
Claims
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IPC IPC(8): E21B43/26E21B28/00
CPCE21B43/26E21B28/00
Inventor 严梁柱魏凯
Owner YANGTZE UNIVERSITY