Whole path and infinite stage segmented fracturing tool and use method thereof

Abstract

The invention discloses a whole path and infinite stage segmented fracturing tool and a use method thereof. The whole path and infinite stage segmented fracturing tool comprises a casing pipe, a casing pipe outer open hole packer component and a bottom packer component, wherein the casing pipe is provided with a plurality of liquid outlets; the casing pipe outer open hole packer component comprises a plurality of pipe outer packers and a bottom circulation assembly; the plurality of pipe outer packers are sheathed out of the casing pipe; in addition, the upper part and the lower part of each liquid outlet are independently provided with the pipe outer packer; the bottom circulation assembly is installed on the bottom of the casing pipe; the bottom packer component is sheathed in the casingpipe and comprises a continuous oil pipe, a perforation spray gun and the bottom packer, wherein the perforation spray gun is installed on the continuous oil pipe and communicates with the continuousoil pipe; and the bottom packer is fixedly installed on the bottom of the continuous oil pipe. According to the whole path and infinite stage segmented fracturing tool disclosed by the invention, theproblem of an unstable well wall of open hole completion is solved, meanwhile, an inner whole path of the casing pipe is realized, the minimum inner diameter of a shaft after fracturing is the innerdiameter of the casing pipe, and an enough space is provided for operations, including later-period production, well repairing and the like.

Description

technical field [0001] The invention belongs to the field of increasing production of oil and natural gas, and in particular relates to a full-bore, infinitely staged staged fracturing tool and a use method thereof. Background technique [0002] In modern oil and gas exploitation, staged fracturing technology is a very effective way to increase production in horizontal well development technology. It is currently widely carried out all over the world and has achieved good results. In particular, the 300-stage fracturing technology of the ball sliding sleeve combined with the open hole packer completion and fracturing integrated casing plays an important role in the development of horizontal wells. In this technology, the ball is thrown from the ground to the tubing. The ball is seated on the ball seat and then blocked. The surface is pumped with fracturing fluid to pressurize the sliding sleeve to open the sliding sleeve. The well fluid transmits the pressure to the producti...

AI Technical Summary

Problems solved by technology

However, this technology has gradually shown some defects in the application process.

[0003] 1. To open the sliding sleeve, the ball seat must be blocked by the fracturing ball and then pressurized to open, so limited by the size of the ball and the size of the tubing, the ball seat must be designed as the part with the smallest inner diameter in the entire fracturing casing 300, so During the fracturing process, a throttling pressure difference will be formed at the ball seat, increasing friction; even when the throttling pressure difference is too large, the sliding sleeve may be opened in advance

[0004] 2. Due to the size limitation of tubing and balls, the number of staged fracturing stages is limited

[0005] 3. Due to the limitation of the tubing size and the inner diameter of the ball seat, the inner diameter of the entire production casing 300 becomes smaller, making it difficult to carry out workover operations in the later production process

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