A hydraulically driven high-pressure pulse fluid output device and its operating method

Abstract

The invention discloses a hydraulically-driven high-pressure pulse fluid output device. The hydraulically-driven high-pressure pulse fluid output device comprises a pump source device, a fracturing fluid supplying device, two sets of fluid pulse generators which are arranged in parallel and are of the same structure, and a servo control system. The pump source device is used for storing water andproviding pressure for the water so as to simulate the deep medium-pressure large-flow hydraulic conditions. The fracturing fluid supplying device is used for providing continuous low-pressure fracturing fluid. The fluid pulse generators utilize the medium-pressure large-flow water output by the pump source device as a power source to convert the continuous low-pressure fracturing fluid into high-pressure pulse fluid to be output. The servo control system is electrically connected with the two fluid pulse generators so as to control the two fluid pulse generators to work alternately. The pulsegenerators of the hydraulically-driven high-pressure pulse fluid output device are provided with two sets of pulse superchargers for alternating output of the high-pressure pulse fluid, thus the output demand of high and low frequency pulse fluid within a large range can be met; and the pulse output process is controlled by a servo controller in a servo mode, and the frequency accuracy of the pulse fluid output process is ensured.

Description

technical field [0001] The invention belongs to the technical field of deep mining and hydraulic fracturing, and in particular relates to a hydraulically driven high-pressure pulse fluid output device and an operating method thereof. Background technique [0002] With the increasing demand for mineral resources in my country and the continuous consumption of shallow resources, the mining of mineral resources and energy will continue to advance to the deep in the future. With the increase in the scale and depth of resource and energy mining, how to achieve effective fracturing of hard rocks and improve the efficiency of resource mining; how to transform deep harmful conditions into favorable resources and realize green mining of resources is the current limiting resource and energy development. technical problems. Hydraulic fracturing technology, as an effective means of fracturing rock mass and increasing permeability, has played an important role in the fields of assisting...

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Problems solved by technology

However, the existing pulse hydraulic fracturing devices still have performance defects: for example, the performance of the pulse conversion device is single, and the pulse fluid is formed by disturbing the flow of a simple excitation chamber, the fluid pulse pressure amplitude is small, and the pulse fluid is unstable; The device forms pulsed fluid by periodically changing the fluid interface, and its pulse frequency is uncontrollable, and only the non-submerged jet has a better edge breaking effect; the pulse pump is used to directly output pulsed fluid, its pulse frequency is controllable but the frequency control range is small, and the pulse waveform is single , the flow output is unstable

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