Patent ID: 8567509
Filing Date: 2013-10-29
Classification: E21B

Abstract:
1. A downhole tool, wherein the downhole tool is configured to provide a flow path from an inner bore thereof to a wellbore annulus after at least two pressure cycles, wherein the downhole tool comprises: a. an outer housing having a first flow port formed therethrough; b. an inner housing having a second flow port formed therethrough; c. a first sleeve disposed between the inner housing and the outer housing, wherein the first sleeve has a first portion and a second portion, wherein a force generating device is disposed between the first portion and the second portion, wherein the first portion has a diameter that is smaller than the second portion, and wherein a third flow port is formed through the second portion; and d. a second sleeve disposed within the inner bore of the inner housing, wherein the second sleeve is temporarily attached with the inner housing with a release mechanism, and wherein the second sleeve blocks the second flow port formed through the inner housing.