Patent ID: 9562419
Date: 2017-02-07
CPC Classifications: E21B

Claim:
1. A downhole tool adapted for use in a tubular string to selectively treat one or more hydrocarbon production zones, comprising: an upper end and a lower end adapted for interconnection to the tubular string; a catch mechanism positioned proximate to said lower end and adapted to selectively catch or release a ball traveling through said tubular string; a sleeve which travels in a longitudinal direction between a first position and a second position, and which is actuated based on an internal pressure in said tubular string, said sleeve preventing a flow of a treatment fluid in a lateral direction into an annulus of a wellbore while in said first position, and permitting the flow of said treatment fluid in the lateral direction through at least one port in said second position; a flange interconnected to the sleeve and comprising a weep hole, the weep hole configured to allow fluid flow to either an upper fluid reservoir and a lower fluid reservoir, wherein the lower fluid reservoir has a greater diameter than the upper fluid reservoir, said weep hole further configured to travel between a first position adjacent the upper fluid reservoir and a second position adjacent the lower fluid reservoir, wherein said sleeve travels at an increased rate when the flange is positioned adjacent the lower fluid reservoir: and a locking mechanism positioned proximate to said catch mechanism, wherein when said catch mechanism is engaged with said locking mechanism, said sleeve is in said second position and said treatment fluid cannot be pumped downstream of said catch mechanism in said tubular string.