Fracturing nipple and fracturing string comprising fracturing nipple

Abstract

The invention provides a fracturing nipple and a fracturing string comprising the fracturing nipple. The fracturing nipple comprises an outer barrel, an inner sliding sleeve, a fracturing sleeve, and a supporting body; a fracturing hole capable of communicating the inside and the outside is formed in the wall of the outer barrel; the inner sliding sleeve is arranged in the inner cavity of the outer barrel and can close the fracturing hole; the inner sliding sleeve can move relative to the outer barrel so as to release the closing of the fracturing hole; the fracturing sleeve is arranged on the outer wall of the outer barrel, can block the fracturing hole and can be damaged under the action of pressure; and the fracturing hole is filled with the supporting body which is used for supporting the fracturing sleeve and can fall off under the action of pressure. According to the fracturing nipple and the fracturing string comprising the fracturing nipple, impurities in a shaft are effectively prevented from entering the inner sliding sleeve, cement paste is effectively prevented from entering the inner sliding sleeve from the fracturing hole in the well cementation and paste replacement process, and then normal and smooth opening of the inner sliding sleeve is protected.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well completion, and in particular relates to a fracturing short joint and a fracturing pipe string containing it. Background technique [0002] With the deepening of oil and gas development, the sliding sleeve has become one of the key tools for communicating the annulus of the oil sleeve and realizing stratified fracturing during the fracturing process. [0003] In the process of oil and gas well completion and gas testing, the oil casing annulus is connected through the opening action of the sliding sleeve to realize circulation, fluid replacement, sand fracturing and other operations. Multi-layer segmental construction requires multiple sliding sleeves to be connected in series on one string, and one stage is opened from bottom to top during construction, and one layer is fractured. With the deepening of the exploration and development of tight gas reservoirs, the horizontal sections of h...

AI Technical Summary

Problems solved by technology

However, in the actual production process, the problem that the sliding sleeve cannot be opened smoothly often occurs, which affects the construction process

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