Bridge plug with low pumping friction resistance for horizontal well, and using method thereof

Abstract

The invention discloses a bridge plug with low pumping friction resistance for a horizontal well, and a using method thereof. The bridge plug comprises a ball seat, a sealing rubber cylinder, a setting cylinder, idler wheels, a slip and a salvage base; the lower end face of the ball seat is connected with the sealing rubber cylinder; the upper end face of the setting cylinder is sleeved with the sealing rubber cylinder, and the lower end face of the setting cylinder is sleeved with the slip; the idler wheels are arranged on the outer wall of the setting cylinder; the lower end face of the slipis connected with the salvage base; and a through hole penetrates through the centers of the ball seat, the sealing rubber cylinder, the setting cylinder, the slip and the salvage base. The bridge plug is simple in structure, and an operating method is simple and convenient; through the idler wheels on the setting cylinder, moving of the bridge plug on the horizontal section is changed from large-friction-resistance transverse sliding into low-friction-resistance idler wheel rolling, thus the good effect of lowering the pumping friction resistance is achieved, and the pumping efficiency of the bridge plug can be improved; and certain passing capacity to resist casing deformation is achieved, and the risk of tripping in of the bridge plug due to casing deformation is reduced.

Description

technical field [0001] The invention relates to the technical field of downhole delamination tools for fracturing horizontal wells in oil and gas fields, in particular to a low-pump injection friction bridge plug for horizontal wells and a method for using the same. Background technique [0002] The single well production of tight oil and gas and shale oil and gas horizontal wells depends on the volume of the reservoir stimulation. The application proportion of the fracturing process is gradually increasing. This process is the main technology for the development of horizontal wells in unconventional oil and gas reservoirs in North America, with an application rate of more than 80%. key technologies. [0003] At present, in the horizontal well bridge plug staged fracturing process, after the bridge plug is lowered to the predetermined position through the cable (the pressure difference generated by pumping the liquid through the wellhead is lowered to the predetermined posi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art above, to provide a low-pump injection friction bridge plug for horizontal wells and its use method, which overcomes 1 in the prior art: the horizontal movement friction of the bridge plug is high, the bridge The speed of plug running is limited. 2: In wells with slight deformation of the casing, the irregularity of the casing will lead to the risk of running the bridge plug. 3: The fixation of the bridge plug is unstable, and the plugging is not complete, etc.

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