Patent ID: 8869898

Claim:
A downhole tool comprising: a housing having a housing outer wall surface, a housing inner wall surface defining a housing bore and a port, the port being in fluid communication with the housing bore and the housing outer wall surface; a sleeve in sliding engagement with the housing inner wall surface, the sleeve comprising a sleeve inner wall surface defining a sleeve bore, a sleeve outer wall surface, and a seat disposed on an upper end of the sleeve, the sleeve outer wall surface and the housing inner wall surface defining a chamber, the chamber being in fluid communication with the port, wherein the chamber is initially isolated from the housing bore; an acid initially disposed and maintained within the chamber prior to downward movement of the sleeve; and a plug element adapted to be disposed into the housing bore, the plug element landing on the seat and blocking fluid flow through the sleeve bore to enable fluid pressure to be applied to the housing bore for downward movement of the sleeve, the downward movement of the sleeve causing the acid to be forced through the port and out of the downhole tool.