Self-triggered liquid carbon dioxide staged fracturing tube

Abstract

The utility model discloses a self -triggering liquid carbon dioxide grading fracturing pipe, including the liquid storage pipe of vertical setting, and the upper end port and lower end port of liquid storage pipe are equipped with upper bung and lower bung respectively, be equipped with injection valve, injection head, excitation pipe and wiring hole on the upper bung, and the lower end of injection head is communicated with the inside of liquid storage pipe, and the upper end of injection head is connected with the lower end of injection valve, and the wiring hole is established in the center of upper bung, and the wiring end of excitation pipe is located in the wiring hole, and the lower part of excitation pipe is inserted into the inside of liquid storage pipe, and the inside of liquid storage pipe is equipped with multiple chambers separated from top to bottom in proper order, and the pipe wall of liquid storage pipe is opened and is equipped with multiple energy -releasing structures communicated with every chamber respectively. The utility model constructs grading self -triggering device based on gas delivery law and memory alloy material, provides a kind of liquid carbon dioxide single-point excitation, multistage self -triggering grading fracturing method, solves the problem of liquid carbon dioxide fracturing single pipe power shortage, multichannel wiring complex.

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