A fracturing sliding sleeve that can be opened and closed multiple times

Abstract

The invention relates to the technical field of oil and gas field horizontal well multi-step fracturing, in particular to a fracturing slide sleeve capable of being opened and closed for many times. The fracturing slide sleeve comprises a fracturing ball, an upper joint, a set screw, a fracturing sleeve, an O-shaped ring, a sand-preventing ring, a striking-off ring, a vulcanization sealing ring, an upper internal slide sleeve, a ball seat, a lower internal slide sleeve, a key, a baffle ring, a locating ring, a shearing ring, a shearing pin, a protecting sleeve and a lower joint. The fracturing slide sleeve is mainly used in the oil and gas field horizontal well section and multistage fracturing, pipe columns of single trip are converted into production pipe columns after ball throwing and fracturing in a multilayer and step-by-step mode. A continuous oil pipe is used for drilling and removing a cast iron ball seat and a composite fracturing ball seat in a one-time mode, and the larger drift diameter is reserved. The internally-arranged groove structure and a matched switch tool can achieve the objective that a fracturing channel of any layer can be opened or closed for many times, and the vulcanized rubber seal structure ensures that the fracturing slide sleeve resists the high temperature and the high pressure.

Description

technical field [0001] The invention relates to the technical field of multi-stage fracturing of horizontal wells in oil and gas fields, in particular to a fracturing sliding sleeve that can be opened and closed multiple times. Background technique [0002] Horizontal well multi-stage fracturing stimulation technology plays an important role in improving the development effect of low permeability and low porosity oil and gas reservoirs, increasing single well production and ultimate recovery, and is one of the effective means of increasing production and injection in oilfields. It has downhole tools Less, highly targeted operations, low construction costs and other advantages. [0003] In the staged fracturing process of horizontal wells, various well-connected well sliding sleeve tools are used. The purpose is to use packers and sliding sleeves to isolate the horizontal well section into several sections according to the needs of oil and gas reservoir development. During t...

AI Technical Summary

Problems solved by technology

In this method, the sliding sleeve remains open after the fracturing operation is completed. However, during the production of horizontal wells, it is easy to see water and gas in the wellbore prematurely, which has a very adverse impact on productivity. The sliding sleeve currently used cannot Implement effective control in well sections with severe water and gas breakthrough

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