Fixed-point quantitative grouting device and system

Abstract

The invention provides a fixed-point quantitative grouting device and system. The fixed-point quantitative grouting system comprises the fixed-point quantitative grouting device. The fixed-point quantitative grouting device sequentially comprises a drilling rod, a cylinder body and a one-way valve from top to bottom; the upper end of the drilling rod is used for being connected with a pressure pump, and the lower end of the drilling rod is connected with the cylinder body through a reducer joint; the cylinder body is of a cylindrical structure, the upper end and the lower end of the cylinder body are open, the one-way valve is detachably connected with the lower end of the cylinder body, a piston is arranged in the cylinder body, and the piston is limited by the reducer joint and the one-way valve when moving up and down along the inner wall of the cylinder body; a cavity is formed in the one-way valve, the upper end of the cavity is open to communicate with the interior of the cylinder body, the bottom of the cavity is sealed, and slurry outlets are formed in the cavity wall of the cavity; and a ball valve is connected with the bottom of the cavity through an elastic piece, and the ball valve is located at the slurry outlets under supporting of the elastic piece so as to partition the slurry outlets and the cavity. The fixed-point quantitative grouting device and system have the beneficial effect that fixed-point quantitative grouting is achieved.

Description

technical field [0001] The invention relates to the technical field of drilling and cementing, in particular to a fixed-point quantitative grouting device and a system. Background technique [0002] During drilling and drilling construction, due to reasons such as drilling lost formations, well wall collapse, or cementing and isolation of a certain formation, it is necessary to inject a certain amount of grout at a certain depth in the wellbore. The traditional treatment method is to pour the grouting fluid into the wellbore through the drill pipe, and form a relatively stable hole wall after it solidifies, then re-drill, and re-form the wellbore by drilling and sweeping the hole. However, this method is labor-intensive and material-intensive. [0003] In actual operation, if too little grouting fluid is injected, the optimal grouting effect cannot be achieved; if too much grouting fluid is injected, there will be residual grouting fluid left in the drill pipe or wellbore r...

AI Technical Summary

Problems solved by technology

[0003] In actual operation, if too little grouting fluid is injected, the optimal grouting effect cannot be achieved; if too much grouting fluid is injected, there will be residual grouting fluid left in the drill pipe or wellbore re-drilling Major problems, increased construction complexity, and poor economic benefits

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