Controllable pulse gas energy pressure cracking device

Abstract

The invention relates to a controllable pulse gas energy pressure cracking device used in mining of an oil and gas well, which comprises a gas energy pressure cracking device and igniters or exploders and tail plugs, wherein the igniters or exploders and the tail plugs are respectively arranged at two ends of the gas energy pressure cracking device, and the gas energy pressure cracking device comprises a gas energy pressure cracking assembly. The igniters or exploders and inner grains in the gas energy pressure cracking assembly are connected together through ignition channels. The gas energypressure cracking assembly comprises a center pipe, the inner grains filled into the center pipe and an outer cartridge arranged at the outer part of the center pipe. The pipe wall of the center pipeis provided with a pressure release fire transmission channel and a channel sealing cover. The invention solves the problem of low capacity caused by uncontrollability of the pressure cracking process and ineffective communication between stratum and a mineshaft in the prior art. The invention can form effectively outstretched communication between the net-shaped multi-crack construction and the mineshaft at the immediate vicinity of wellbore in the target bed through controlling the rate of pressure rise, peak pressure, pressure platform and total energy of the gas energy pressure cracking, thereby greatly improving the capacity of the oil and gas well.

Description

technical field [0001] The invention relates to a fracturing device used in the exploration and exploitation of underground oil, gas, water, etc., in particular to a controllable pulse gas energy fracturing device especially suitable for the exploitation of oil and gas wells. Background technique [0002] The key to improving the productivity of oil and gas wells lies in the degree of connectivity between the wellbore and the formation. [0003] High-energy gas fracturing technology is one of the stimulation measures for oil and gas wells. Its function is to form a network multi-fracture pattern in the zone near the wellbore of the target layer, so that the wellbore and the formation can form a high conductivity connection. High-energy gas fracturing technology is mainly divided into two categories: high-energy gas fracturing with shell and high-energy gas fracturing without shell. [0004] The structure of the existing shelled high-energy gas fracturing device limits the c...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a controllable pulse gas energy fracturing device, which solves the technical problems in the prior art that the fracturing process is uncontrollable, and the effective communication between the formation and the wellbore cannot be realized, resulting in low production capacity.

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