Throwing type high energy gas fracturing device

Abstract

The invention relates to an expendable fracturing machine with high-energy air, belonging to increasing technology for oil and gas well, comprising ignition device, fracturing bomb connected with the ignition device. The ignition device comprises piston for firing pin in the cylinder and exciting device. The piston for firing pin is connected with the cylinder by radial fixed pin. The detonator or artillery primer of fracturing bomb is set at the bottom of cylinder and is corresponding to firing pin. The special feature of invention is that said exciting device for firing pin comprises pilot valve controlled by spring to open; the inlet of pilot valve is connected with outside, the first port of connecting pipe is located at the position of outlet of pilot valve and the second port of connecting pipe is connected with sealing hollow cavity at the tail of the piston for firing pin. Because the spring is used to control the open of pilot valve so as to guide the fluid in well to the piston for firing pin, it is provided with quick respond, high control accuracy, reliably running and high success rate of work.

Description

technical field [0001] The invention belongs to oil and gas well stimulation technology, in particular to a drop-in high-energy gas fracturing device. Background technique [0002] For production wells or old wells in oilfields, with the increase of production time, the geological conditions around the original perforated section of the oil layer will continue to change. In addition to the potential pollution to the formation caused by the drilling and completion process before putting into production, after the oil well is put into production, the crude oil in the oil layer enters the perforation tunnel through rock pores, natural fractures or artificial fractures. During this process, organic matter, polymers, and downhole microorganisms and bacteria in the oil layer will gradually accumulate to block the pores and fractures near the wellbore, resulting in poor permeability of the near wellbore, resulting in a gradual decrease in oil production and shutdown the result of....

AI Technical Summary

Problems solved by technology

This process has the following defects: 1) The high-temperature and high-pressure gas formed after the fracturing bomb is burned causes the cable to be ablated; 2) The cable is lifted up and knotted, especially for the oil pipeline transportation operation, and the cable knot has a great impact on the construction ; 3) Construction operations need to be equipped with equipment such as cable cars and positioning instruments, and the construction cost increases

The launch type fracturing device determines the fracturing at the predetermined position through the relationship between the fluid pressure in the well and the shear resistance of the piston fixing pin, but in fact, due to the influence of processing, assembly and material itself, each fixing pin It is difficult to achieve accurate control of the shear resistance, and it is even more difficult to cut several fixed pins at the same time. Once several fixed pins are sheared at inconsistent times or the error of the accumulated shear force is large, this The method of using the shear resistance of fixed pins to control the location of fracturing will lose its meaning

In addition, the shearing process time of the fixed pin is also relatively long

Therefore, the response speed of this delivery type fracturing device is slow, the precision is low, the error is large, and it is easy to fail

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