Fracturing sliding sleeve

Abstract

The invention discloses a fracturing sliding sleeve, and belongs to the technical field of petroleum and gas mining equipment. The fracturing sliding sleeve comprises an upper joint, an upper pipe body, a lower pipe body, a transition pipe body, a lower joint, a counting sliding sleeve, a sliding sleeve spindle, a ball collection elastic claw, an elastic claw base and a blocking ball; the counting sliding sleeve is located in the upper pipe body and can axially move; multiple first positioning grooves are formed in the inner surface of the upper pipe body in the axial direction, and first positioning claws matched with the first positioning grooves are arranged on the outer surface of the counting sliding sleeve; the upper end of the ball collection elastic claw is located at the lower end inside the lower pipe body, and the lower end of the ball collection elastic claw is located at the upper end inside the transition pipe body and can axially move; the elastic claw base is located under the ball collection elastic claw, and the ball collection elastic claw can enter the elastic claw base; the initial inner diameter of the ball collection elastic claw is larger than the diameter of the blocking ball, and the inner diameter of the ball collection elastic claw entering the elastic claw base is smaller than the diameter of the blocking ball. By adopting the fracturing sliding sleeve, different levels of underground sliding sleeves can be opened layer by layer through the blocking balls with the same size, and then full bore perforating of underground pipe strings is achieved.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation equipment, in particular to a fracturing sliding sleeve. Background technique [0002] In the process of oil and gas exploitation, fracturing operation is a very effective production stimulation method, especially layered stimulation technology has become an important means of production stimulation in low permeability oil and gas reservoirs, and has been widely used in Chuanzhong Xuer, Moxi Leiyi and Carboniferous system in eastern Sichuan. The fracturing sleeve is a downhole tool used to open and close the annulus of the oil casing in horizontal well open hole production or fracturing, and is an important part of horizontal well open hole staged reservoir stimulation. [0003] The ball-pitching sleeve is a commonly used fracturing sleeve, mainly including: upper joint, lower joint, body, sliding sleeve mandrel and ball seat. The upper joint and the lower joint are respectively...

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Problems solved by technology

[0004] To sum up, in the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: using the existing fracturing sleeves to carry out layered reconstruction of the open hole of the horizontal well will make the inner diameter of the downhole pipe string more and more It is not conducive to later production logging; and due to the limitation of the diameter of the tubing and the requirements of the diameter, the number of stages of layered stimulation is limited

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