Multi-level sliding sleeve
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United States of America Patent
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Jun 14, 2016
Grant Date -
Jul 3, 2014
app pub date -
Sep 5, 2013
filing date -
Dec 28, 2012
priority date (Note) -
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Abstract
A multi-level sliding sleeve including an outer cylinder, an inner sliding sleeve, a combined ball socket, a guider, an expander, an upper gland, a lower gland, and a ball. The outer cylinder includes internal threads in an upper end and external threads in a lower end, and the outer cylinder including an external wall including a plurality of drainage holes along the peripheral direction. The inner sliding sleeve is mounted to an inner wall of the outer cylinder through shear pins. The inner sliding sleeve includes a plurality of square holes in the middle along the peripheral direction, each of which is equipped with a ball socket inside. The ball sockets combine together to form a combined ball socket. The combined ball socket is equipped with the guider in the upper end and the expander in the lower end.
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