Fracturing pressure determining device and method for carbon dioxide fracturing device

Abstract

The invention discloses a fracturing pressure determining device and method for a carbon dioxide fracturing device. The device comprises an energy leaking cover, a pressure sensor and a signal collecting unit, the energy leaking cover is of a barrel-shaped structure with openings in two ends, the energy leaking cover is installed on an energy leaking head of the fracturing device through an open cover at one end in an opposite-fixation mode, and the pressure sensor is attached to the inner wall of the energy leaking cover and is in signal connection with the signal collecting unit. Through the pressure sensor, during high-speed gasification of liquefied carbon dioxide, a fracturing pressure signal of the fracturing device is measured and transmitted to the signal collecting unit. The fracturing pressure determining device is mainly used for accurately measuring the fracturing pressure of the carbon dioxide fracturing device. The device carries out an experiment conveniently, is easy to operate and accurate and reliable in measurement result, provides possibility for accurate calibration of the liquefied carbon dioxide, and not only can provide reliable data for designing and producing of fracturing devices of different dimensions, but also can analyze and research the change relation between fracturing pressure and distance, so that the utilization rate of energy is increased.

Description

technical field [0001] The present invention relates to a cracking pressure measurement device and method of a carbon dioxide cracker, in particular to a method for directly measuring the impact of high-pressure gas on the surrounding space or during the process of instantaneous gasification of liquid carbon dioxide and high-speed release from the energy release hole of the cracker. A device and method for the magnitude of the pressure of a substance. Background technique [0002] Carbon dioxide phase change fracturing technology was originally developed by the United Kingdom in the 1950s. It was mainly used as a coal and rock crushing method for high-gas wells to replace explosives, increase the lump coal rate, and avoid gas explosions. Later, due to the advent of large-scale fully mechanized mining equipment, safe and efficient non-explosive coal mining operations were realized and gradually replaced CO 2 Disguised blasting technology; since then, this technology has been...

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Problems solved by technology

[0004] In addition, phase change fracturing technology is a new type of physical blasting technology. Compared with traditional blasting technology, it has the advantages of no pollution, low price, low noise, small vibration, safety and reusability. It can be used in urban demolition blasting, subway Blasting, tunneling blasting, and mining blasting have great room for development, but there are few special studies on carbon dioxide fracture pressure. Generally, some empirical values ​​are obtained according to conventional on-site detection methods, while conventional in-hole detection The method is based on an ideal environment and does not consider the influence of geological structure and rock properties, which makes the measured data ambiguous and does not have an exact value, which seriously affects the fragmentation effect and energy utilization rate of carbon dioxide phase change fracturing technology.

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