Ball-throwing type high energy gas fracturing device

Abstract

The invention belongs to a coal seam gas well fracturing technology, and provides a ball-throwing type high energy gas fracturing device aiming to solve the problem that the proportion of rupture cracks formed by a hydraulic fracturing method is low, and the coal seam methane is difficult to be effectively exploited. The ball-throwing type high energy gas fracturing device comprises an upper sealing unit, a vibration trigger unit, an energy releasing unit, a pressure recording unit, a lower sealing unit and a guide shoe which are connected from the top to bottom in sequence; and the vibration trigger unit completes vibration of a pitching sealing ball, the energy releasing unit completes release of high energy gas generated by burst of the sealing ball, and the top of the upper sealing unit is connected with a ground fracturing truck pumper through a succession oil pipe. The vibration trigger unit of the device can realize an effect of shocking and trigger of the sealing ball, the high energy released by the sealing ball explosion can enter a target coal reservoir through a pressure relief hole of the energy releasing unit, vibration of the area near a well is conducted, an abnormal micro fracturing network system can be developed in coal matrix and communicate with original fracture, the permeability of the coal reservoir is improved, the reservoir is transformed, and increased production is achieved.

Description

technical field [0001] The invention belongs to coal bed gas well fracturing technology, in particular to a ball-pitching high-energy gas fracturing device. Background technique [0002] Hydraulic fracturing still plays a dominant role in the fracturing and stimulation measures of coalbed methane wells, but water molecules are relatively large, making it difficult to enter the matrix micropore system where coalbed methane is located, and the proportion of conventional fracture fractures formed is low, so coalbed methane is very large. It is difficult to mine effectively, and the effect of increasing production is limited. [0003] In view of the fact that nitrogen vibration fracturing is widely used in Canada, it is considered to be a relatively effective measure to increase coalbed methane production. Therefore, after investigating the current nitrogen vibration fracturing process, we have an in-depth understanding of the use of the entire nitrogen vibration fracturing tool...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the proportion of fractured fissures formed by hydraulic fracturing is low, it is difficult to effectively exploit

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