Fracturing devices used in tubing strings

Abstract

The invention relates to a fracturing device used in a tubular column. The fracturing device used in the tubular column comprises a tube body, a sliding sleeve and a driving mechanism, wherein the tube body is connected in the tubular column; a fracturing opening and a guiding component are arranged on the tube body; the sliding sleeve is embedded in the tube body; a trajectory groove used for accommodating the guiding component is arranged in the peripheral surface of the sliding sleeve; the driving mechanism is used for actuating the sliding sleeve. The trajectory groove is constructed, when the driving mechanism pushes the sliding sleeve to move towards an upstream direction or a downstream direction in the tube body, to be capable of actuating the sliding sleeve to rotate via the guiding component, and to enable the sliding sleeve to selectively open, partially open or close the fracturing opening. According to the fracturing device used in the tubular column, which is provided by the invention, not only can the own fracturing opening be effectively closed, but also an open extent of the fracturing opening can be adjusted; an oil extraction rate of each stratum section can be effectively controlled; the reasonable and efficient oil extraction is facilitated.

Description

technical field [0001] The invention belongs to the technical field of petroleum well completion and cementing, and in particular relates to a fracturing device used in a pipe string. Background technique [0002] Sliding sleeve staged fracturing technology is an important reservoir stimulation technology, which is widely used in open hole completion and reservoir stimulation construction of unconventional oil and gas resources such as shale gas, low-permeability sandstone and coalbed methane. The staged fracturing technology mainly relies on tools such as fracturing devices and open hole packers, among which the fracturing device is one of the core devices in the staged fracturing technology. [0003] In the field construction, the completion string composed of the above tools is lowered into the open hole section of the oil and gas well, and the open hole packer is used to isolate and segment the well section by throwing balls to suppress the pressure. Suppress the pressu...

AI Technical Summary

Problems solved by technology

[0004] At present, the main problem of the existing fracturing device is that after the fracturing is completed, the fracturing device cannot close the fracturing opening, so that the oil reservoir may have water in the later stage of production, resulting in the well Unable to mine normally

At the same time, the sliding sleeve of the existing fracturing device cannot partially open the fracturing opening, so that the opening degree of the fracturing opening cannot be adjusted in the later stage of oil production, and the oil recovery rate cannot be effectively controlled, which is very unfavorable for oil recovery

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