Rotary control stepless ball fracturing sliding sleeve

Abstract

The invention relates to the technical field of ball fracturing sliding sleeves, in particular to a rotary control stepless ball fracturing sliding sleeve. The rotary control stepless ball fracturing sliding sleeve comprises an upper connector, a sliding sleeve body, a lower connector, an inner sliding sleeve and a rotary control sliding sleeve. The outer side of the lower portion of the upper connector and the inner side of the upper portion of the sliding sleeve body are fixedly installed together. The inner side of the lower portion of the sliding sleeve body and the outer side of the upper portion of the lower connector are fixedly installed together. The lower portion of the inner sliding sleeve and the sliding sleeve body are fixedly installed together through shear pins. Two or more internal fracturing holes are distributed in the upper portion of the inner sliding sleeve along the circumference. The rotary control stepless ball fracturing sliding sleeve is reasonable and compact in structure and convenient to use, stepless ball fracturing is achieved, technical support is provided for opening all fracturing reservoirs through fracturing balls in the same size, the number of fracturing layers is not restrained by the diameters of fracturing balls, pressure loss at ball seats with different diameters in the existing fracturing operation process is reduced, ball seat grinding and milling procedures are omitted, fracturing efficiency is improved, fracturing cost is reduced, and the rotary control stepless ball fracturing sliding sleeve can be applied to underground fracturing production increase operation.

Description

technical field [0001] The invention relates to the technical field of ball-pitching fracturing sleeves, and relates to a rotation-controlled stepless ball-pitching fracturing sleeve. Background technique [0002] At present, advanced fracturing methods such as coiled tubing method and dart throwing method are mainly used in foreign countries for downhole stepless fracturing. However, there are still the following main problems in domestic ball-pitching fracturing sleeves: 1. Using balls with increasing diameters to carry out fracturing from bottom to top, limited by the diameter of the plugging balls, the number of fracturing layers is limited; 2. Due to the gradual decrease in diameter Small impact, the fracturing of the lower layer needs to overcome the resistance loss of the upper sliding sleeve, when the number of fracturing layers is large, it may lead to a huge friction loss, reducing fracturing efficiency and energy consumption; 3. In the domestic ball-ball fracturin...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a rotation-controlled stepless ball-pitching fracturing sleeve, which overcomes the deficiencies of the prior art and can effectively solve the problem that the number of fracturing layers existing in the actual use of the existing ball-pitching fracturing sleeve is limited by the diameter of the ball. limit problem

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