Sand blasting device allowing fracturing sliding sleeve to be fished

Abstract

Disclosed is a sand blasting device allowing a fracturing sliding sleeve to be fished. The sand blasting device aims at overcoming defects that the liquid flow is unsmooth and construction operations for oil well sand production cannot be performed through a conventional sand flushing technology caused by retention of injected balls and sliding grooves in pipe strings after the fracturing construction operation. The device comprises a body, a sliding sleeve and a ball. The upper and lower ends of the body are provided with threads connected with a completion pipe string and a matched tool, an inner hole of the body is a big-end-up stepped hole, a straight hole longer than the sliding sleeve is formed in the middle, a radial through hole is formed in the upper end of the straight hole, and an inner boss of the lower end of the body is a limit face. The sliding sleeve is disposed in the straight hole in the middle of the body, the sliding sleeve and the body are radially fixed through a shear pin, and the radial through hole of the body is closed by the upper end of the sliding sleeve. An inner boss of the lower end of the sliding sleeve is a ball seat. The device has the advantages that the device is simple and reasonable in structure, easy to operate and safe and reliable; the inner sliding sleeve and the ball in a down-hole pipe string can be taken out through a conventional fishing technology, the inner drift diameter of a down-hole tool is guaranteed, convenience is provided for later construction operations, the operation cycle is shortened, and operation costs are reduced.

Description

technical field [0001] The invention relates to a downhole fracturing sliding sleeve for oil and gas development, in particular to a sand blasting device for a fishable fracturing sliding sleeve. Background technique [0002] In order to improve the comprehensive benefits of oilfield exploration and development, the use of horizontal well technology is an important way, especially for horizontal wells in low-porosity and low-permeability oil and gas reservoirs and complex structural wells whose production cannot meet the requirements of economic development, fracturing and stimulation measures will be adopted. The fracturing process of flat wells is complicated, and the performance requirements of downhole tools are high. At present, the multi-stage fracturing reconstruction of horizontal wells in oil and gas fields generally adopts oil layer special drilling technology and hanging packers, sliding sleeves, open hole packers and supporting tools to realize multi-stage fractu...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of existing fracturing operations such as balls and sliding sleeves remaining in the pipe string, resulting in poor liquid flow in the pipe string and the inability to use conventional sand washing technology to carry out construction operations for sand production in oil wells, the present invention provides a Retrieve Fracturing Sleeve Sandblasting Device

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