Self-packing dual-channel fluid control stepless fracture sliding sleeve device

Abstract

The invention belongs to the technical field of a petrol engineering technology, and discloses a self-packing dual-channel fluid control stepless fracture sliding sleeve device. The self-packing dual-channel fluid control stepless fracture sliding sleeve device comprises an upper flow distribution joint, an inner center pipe connected with the upper flow distribution joint, an outer center pipe, an outer sleeve cylinder, an upper pressing ring at the lower part of the outer sleeve cylinder, a piston between the upper pressing ring and the outer center pipe, a lock ring stopping ring at the lower part of the outer sleeve cylinder, a lock ring on the piston, and a separating ring, a rubber cylinder, a lower pressing ring, a slide sleeve, a lower joint and a flow distribution sleeve cylinder; the separating ring, the rubber cylinder, the lower pressing ring, the slide sleeve, the lower joint and the flow distribution sleeve cylinder are arranged beneath the upper pressing ring orderly; the lower pressing ring is connected to the middle of the outer center pipe and the flow distribution sleeve cylinder, and the slide sleeve is connected to the middle of the lower end of the inner center pipe and the flow distribution sleeve cylinder; the lower joint is connected to the lower end of the flow distribution sleeve cylinder. The technical scheme has the advantages of realizing the integrated design of a packer and the slide sleeve, reducing connection between tools, improving the tool reliability, saving construction cost, and improving the multi-grade segmental cracking efficiency; except for a regular oil flow channel with large drift diameter, the device is further provided with an independent second fluid control channel, thus the hydraulic control of underground tools at the well head is realized and the normal conveying of the oil fluid is not influenced.

Description

technical field [0001] The invention relates to the technical field of petroleum engineering, and relates to a self-sealing double-channel hydraulically controlled stepless fracturing sliding sleeve device, which realizes stepless segmental fracturing, reduces fracturing costs, and improves the reliability of fracturing operations. Background technique [0002] The existing multi-stage staged fracturing process is mainly to connect the packer and the ball-throwing sleeve, and set the packer and open the sleeve by putting fracturing balls into the fracturing string and pressing the sleeve, so as to realize the separation of different oil layers. This multi-stage staged fracturing process not only needs to connect the packer and the ball-pitching sleeve through the tubing, but also requires the injection of fracturing balls to open the sleeve, which has low reliability and is easy to cause Downhole tool connection failure, limited number of sections, high operating cost, high ...

AI Technical Summary

Problems solved by technology

[0002] The existing multi-stage staged fracturing process is mainly to connect the packer and the ball-throwing sleeve, and set the packer and open the sleeve by putting fracturing balls into the fracturing string and pressing the sleeve, so as to realize the separation of different oil layers. This multi-stage staged fracturing process not only needs to connect the packer and the ball-pitching sleeve through the tubing, but also requires the injection of fracturing balls to open the sleeve, which has low reliability and is easy to cause Downhole tool connection failure, limited number of sections, high operating costs, high risks, etc.

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