Laser-liquid nitrogen abrasive jet combined rock breaking test device

Abstract

The invention relates to a laser-liquid nitrogen abrasive jet combined rock breaking test device which comprises an erosion kettle, a switching structure, a clamping structure, an abrasive mixing seat, an abrasive tank, a laser generator, an overflow valve, a second stop valve and a third stop valve. When a test is carried out, grinding materials are added into the grinding material tank firstly, then the rear cover is opened, a rock sample to be tested is clamped by the clamping structure according to the test design target distance and adjusted to the design target distance, the rear cover is installed, and then the overflow value of the overflow valve is adjusted according to the hydrostatic pressure value at the stratum depth needing to be simulated by the test. After the test confining pressure is changed, the first stop valve and the second stop valve are closed, the third stop valve is opened, the plunger pump is started to inject liquid nitrogen into the erosion kettle until the pressure reaches the required confining pressure, and then the erosion test can be carried out.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a laser-liquid nitrogen abrasive jet combined rock breaking test device. Background technique [0002] Oil and natural gas are important energy resources and the source of economic and social development. With the progress of exploration and development, my country's shallow oil and gas fields generally enter the middle and late stages of exploitation, with insufficient stamina of production capacity, and the difficulty of stabilizing production increases year by year; while most of the oil and gas resources to be developed are deep oil reservoirs, which need to be drilled deep wells for production, but the in-situ stress conditions Problems such as complexity, poor formation drillability, and high rock hardness restrict the pace of deep drilling speed increase, seriously affecting the drilling cycle and cost. Therefore, it is urgent to explore a cost-effective r...

AI Technical Summary

Problems solved by technology

With the progress of exploration and development, my country's shallow oil and gas fields generally enter the middle and late stages of exploitation, with insufficient stamina of production capacity, and the difficulty of stabilizing production increases year by year; while most of the oil and gas resources to be developed are deep oil reservoirs, which need to be drilled deep wells for production, but the in-situ stress conditions Problems such as complexity, poor drillability of the formation, and high rock hardness restrict the pace of deep drilling speed increase, seriously affecting the drilling cycle and cost

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