Fracturing device used for oil-gas pipe column

Abstract

The invention relates to a fracturing device used for an oil-gas pipe column. The device comprises a cylindrical assembly connected with the oil-gas pipe column in series and used for defining buffer space for receiving fluid in the oil-gas pipe column, a sliding sleeve fixedly arranged on the inner wall of the cylindrical assembly through a cutting unit and an actuating mechanism capable of pushing the sliding sleeve. When the actuating mechanism pushes the sliding sleeve to force the cutting unit to lose efficiency, the sliding sleeve enters the buffer space and performs buffer motion under the combined effect of the buffer space and the fluid. The fracturing device used for the oil-gas pipe column has following beneficial effects: due to the fact that the e fracturing device used for the oil-gas pipe column can timely buffer movement of the sliding sleeve, friction loss and collision damage to the sliding sleeve, an outer cylinder and related parts can be greatly reduced so that service life of the fracturing device is prolonged.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resource exploitation, and in particular relates to a fracturing device for oil and gas pipe strings. Background technique [0002] As one of the important devices for the exploitation of unconventional oil and gas resources, fracturing devices are widely used in various oil and gas wells. In other words, people can use fracturing devices to implement fracturing technology on oil-bearing formation geology, thereby increasing the production of oil and gas wells. [0003] The existing fracturing device comprises an outer cylinder with a fracturing hole, a sliding sleeve fixed in the outer cylinder by shear pins, and a ball seat arranged in the sliding sleeve. When the pressure-suppressing ball falls into the ball seat, the fluid in the oil and gas pipe string will force the sliding sleeve to cut the shear nails under the blocking action of the pressure-suppressing ball and the ball seat, so tha...

AI Technical Summary

Problems solved by technology

[0004] However, at the moment when the shear nails are cut off, the fluid exerts a great force on the sliding sleeve, forcing the sliding sleeve to move rapidly to the position where the fracturing hole is opened.

During the rapid movement of the sliding sleeve, the sliding sleeve and the outer cylinder inevitably need to withstand severe friction and severe impact, resulting in serious damage to the structure of the two

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