Thermal-ignition high-energy gas pulse fracturing device

Abstract

The invention discloses a thermal-ignition high-energy gas pulse fracturing device. The thermal-ignition high-energy gas pulse fracturing device is formed by connecting an oil transmission or cable ignition joint component, a fire transmission joint component, one or more airtight thermal ignition device components, one or more fracturing main charge components, one or more series-connected joint components and a gun breech in series, wherein the airtight thermal ignition device components are ignited by using ignition tubes; the ignition tubes ignite high-heat micro-air gunpowder or airless high-heat explosives in the airtight thermal ignition devices; the airtight thermal ignition devices are sealed systems and keep a complete structure before and after ignition; main charges are ignited by heat transmitted from the airtight thermal ignition devices; and the main charges combust and quickly generate a great amount of fuel gas. A plurality of devices are connected in series by using ignition joints, the number of the devices connected in series is not limited, and the instant or delayed ignition tubes are filled in the ignition joints, so that the combustion transmission of multi-level devices is realized. The thermal-ignition high-energy gas pulse fracturing device solves the problems that a deflagration state is difficult to control, pressure in mineshafts is superposed and sleeves are damaged, and a great amount of debris pollutant and blockage exist after deflagration in the prior art.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a high-energy gas fracturing device, in particular to a thermal ignition high-energy gas pulse fracturing device. Background technique [0002] High-energy gas fracturing technology uses a large amount of high-temperature and high-pressure gas generated by the deflagration of gunpowder in oil and gas reservoirs to rapidly expand and fracture the formation, so that a number of radial fractures that are not controlled by in-situ stress are generated near the wellbore, thereby improving the permeability and conductivity of the formation , to achieve the purpose of increasing production of oil and gas wells and increasing injection of water wells. [0003] The current high-energy gas fracturing device basically uses a detonator or an electric detonator to trigger the explosion of the detonating cord, the detonating index triggers the ignition device, and the ignition dev...

AI Technical Summary

Problems solved by technology

The above technologies or devices have the advantages of fast boosting rate and high peak pressure, and are widely used in oil and gas well fracturing stimulation, and have achieved good production and injection effects. less than 1000ms), the peak pressure is difficult to control, the effect is difficult to measure, and even pressure superposition in the wellbore occurs, and sometimes casing damage occurs

Some devices produce a large amount of debris after deflagration, causing wellbore pollution, and even blockage of downhole injection and production equipment.

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