发明授权
US09500066B2 System and method for activating a down hole tool 有权
用于激活井下工具的系统和方法

System and method for activating a down hole tool
摘要:
One disclosed sleeve assembly disposed within a base pipe includes a first sleeve portion having a first shear resistance for resisting movement of the sleeve assembly with respect to the base pipe, and a second sleeve portion moveable with respect the first sleeve portion and having a second shear resistance for resisting movement of the second sleeve portion with respect to the first sleeve portion, the second shear resistance being greater than the first shear resistance.
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