Device and method of electromagnet control intelligent ball injection for horizontal well multistage fracturing

Abstract

The invention discloses a device and method of electromagnet control intelligent ball injection for horizontal well multistage fracturing. The device comprises an annular pipeline, a ball injection module, a ball injection detecting device (6) and a fluid collecting device (14). The annular pipeline comprises a fracturing fluid main pipeline, a special-shaped connecting pipe (4), an annular connecting pipe (18) and a straight connecting pipe (17), and the special-shaped connecting pipe (4), the annular connecting pipe (18) and the straight connecting pipe (17) are sequentially communicated to form a U-shaped through pipe. The fracturing fluid main pipeline comprises a fracturing fluid main pipeline large-diameter segment (9) and a fracturing fluid main pipeline small-diameter segment (10), one side of the fracturing fluid main pipeline large-diameter segment (9) is communicated with the special-shaped connecting pipe (4), and the special-shaped connecting pipe (4) is communicated with the fluid collecting device (14). The ball injection module is arranged above the special-shaped connecting pipe (4). The device and method have the advantages that under the condition of not stopping a pump, remote control and ball injection sequence adjustment of multiple times of ball injection in multistage fracturing are achieved, the success rate of ball injection is high, use is convenient, and the device can be repeatedly used.

Description

technical field [0001] The invention relates to a ball throwing device, in particular to an electromagnet-controlled intelligent ball throwing device and method for multi-stage fracturing of a horizontal well. Background technique [0002] Since the 1990s, with the increasing demand for oil and gas resources and the advancement of science and technology, staged fracturing technology has been developed rapidly and widely used. The ball launcher is an indispensable equipment in the staged fracturing process. In the fracturing process using the intelligent sliding sleeve as the downhole intelligent switch, the opening and closing of the intelligent sliding sleeve is controlled by putting in the tag ball to realize the fracturing of the target formation. [0003] At present, the pitching process can be divided into pump-off pitching and pressurized pitching. The traditional process of stopping the pump and throwing the ball is to remove the plug at the ball hole at the wellhea...

AI Technical Summary

Problems solved by technology

[0004] 1. The requirements for bearing pressure are high, and the volume of the space is large. Since the ball chamber is directly connected to the main channel of fracturing due to the work under pressure, the pressure bearing design requirements for the device are very high;

[0005] 2. The efficiency of pitching is low. The existing ball chambers arranged vertically under pressure are designed for steel balls. When new low-density electronic tagged balls appear, the probability of tagged balls entering the fracturing pipeline is low;

[0006] 3. The function of preventing misoperation of pitching is lacking;

[0007] 4. The installation steps of the label ball are cumbersome

Images