Fracturing device for exploitation of coal bed methane in low-permeability zone

Abstract

The invention discloses a fracturing device for exploitation of coal bed methane in a low-permeability zone. According to the device, a fracturing controller is used for controlling the fracturing condition of a fracturing pipe and the hole sealing condition of a segmented hole sealing mechanism for fracturing respectively, and the fracturing condition in a fracturing hole can be effectively controlled. The segmented hole sealing mechanism for fracturing of the device can separate all segments of the fracturing pipe in the fracturing hole in a separated sealed manner, and segmented fracturingoperation is realized by utilizing each segment of the fracturing pipe, so that the uniformity and completeness of fracturing are effectively improved, and the fracturing capacity is ensured. When hole sealing operation is carried out on each section, the hole sealing effect of each section can be ensured, the hole sealing efficiency is ensured, the fracturing capacity of each section of fracturing is improved, and the fracturing effect is guaranteed.

Description

technical field [0001] The invention relates to a fracturing device, in particular to a fracturing device for coal bed methane development in a low-permeability area. Background technique [0002] At present, for coal seams in low-permeability areas, in the exploitation of coalbed methane, it is generally necessary to use special fracturing equipment to perform fracturing operations on coal seams so that the permeability in the coal seams can reach the required value and facilitate the extraction of coalbed methane. freed. The current fracturing equipment generally performs fracturing on the entire fracturing hole. Although this fracturing method is simple, due to the long fracturing hole, it is difficult to achieve a better effect of fracturing pressure during fracturing. Moreover, in the process of fracturing, if there are many voids in a certain part or there are cavities such as air leakage, the problem of fracturing inhomogeneity is prone to occur during fracturing. Fo...

AI Technical Summary

Problems solved by technology

The current fracturing equipment generally performs fracturing on the entire fracturing hole. Although this fracturing method is simple, due to the long fracturing hole, it is difficult to achieve a better effect of fracturing pressure during fracturing. Moreover, in the process of fracturing, if there are many voids in a certain part or there are cavities such as air leakage, the problem of fracturing inhomogeneity is prone to occur during fracturing. For low-permeability positions, it is still difficult to achieve very Good fracturing, but the fracturing is more serious for the position with large voids, which leads to the imbalance of fracturing and it is difficult to achieve the balance of fracturing

Images